path: root/src/main/java/de/pixart/messenger/ui/XmppActivity.java

package de.pixart.messenger.ui;

import android.Manifest;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.app.PendingIntent;
import android.content.ActivityNotFoundException;
import android.content.ClipData;
import android.content.ClipboardManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.IntentSender.SendIntentException;
import android.content.ServiceConnection;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.res.Resources;
import android.content.res.TypedArray;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.Point;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.GradientDrawable;
import android.net.ConnectivityManager;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.PowerManager;
import android.os.SystemClock;
import android.preference.PreferenceManager;
import android.provider.Settings;
import android.text.InputType;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.Pair;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageView;
import android.widget.Spinner;
import android.widget.Toast;

import androidx.annotation.BoolRes;
import androidx.annotation.NonNull;
import androidx.annotation.StringRes;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatDelegate;
import androidx.core.content.ContextCompat;
import androidx.databinding.DataBindingUtil;

import net.java.otr4j.session.SessionID;

import java.io.File;
import java.io.IOException;
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.RejectedExecutionException;
import java.util.concurrent.atomic.AtomicInteger;

import de.pixart.messenger.Config;
import de.pixart.messenger.R;
import de.pixart.messenger.crypto.PgpEngine;
import de.pixart.messenger.databinding.DialogQuickeditBinding;
import de.pixart.messenger.entities.Account;
import de.pixart.messenger.entities.Contact;
import de.pixart.messenger.entities.Conversation;
import de.pixart.messenger.entities.Message;
import de.pixart.messenger.entities.Presences;
import de.pixart.messenger.services.AvatarService;
import de.pixart.messenger.services.BarcodeProvider;
import de.pixart.messenger.services.EmojiService;
import de.pixart.messenger.services.UpdateService;
import de.pixart.messenger.services.XmppConnectionService;
import de.pixart.messenger.services.XmppConnectionService.XmppConnectionBinder;
import de.pixart.messenger.ui.util.PresenceSelector;
import de.pixart.messenger.ui.util.SoftKeyboardUtils;
import de.pixart.messenger.utils.AccountUtils;
import de.pixart.messenger.utils.CryptoHelper;
import de.pixart.messenger.utils.ExceptionHelper;
import de.pixart.messenger.utils.MenuDoubleTabUtil;
import de.pixart.messenger.utils.ThemeHelper;
import de.pixart.messenger.xmpp.OnKeyStatusUpdated;
import de.pixart.messenger.xmpp.OnUpdateBlocklist;
import de.pixart.messenger.xmpp.XmppConnection;
import me.drakeet.support.toast.ToastCompat;
import pl.droidsonroids.gif.GifDrawable;
import rocks.xmpp.addr.Jid;

import static de.pixart.messenger.ui.SettingsActivity.ENABLE_OTR_ENCRYPTION;
import static de.pixart.messenger.ui.SettingsActivity.USE_BUNDLED_EMOJIS;
import static de.pixart.messenger.ui.SettingsActivity.USE_INTERNAL_UPDATER;

public abstract class XmppActivity extends ActionBarActivity {

    protected static final int REQUEST_ANNOUNCE_PGP = 0x0101;
    protected static final int REQUEST_INVITE_TO_CONVERSATION = 0x0102;
    protected static final int REQUEST_CHOOSE_PGP_ID = 0x0103;
    protected static final int REQUEST_BATTERY_OP = 0x49ff;
    protected static final int REQUEST_UNKNOWN_SOURCE_OP = 0x98ff;

    public static final String EXTRA_ACCOUNT = "account";

    public XmppConnectionService xmppConnectionService;
    public MediaBrowserActivity mediaBrowserActivity;
    public boolean xmppConnectionServiceBound = false;

    protected int mColorWarningButton;
    protected int mColorWarningText;
    protected int mColorDefaultButtonText;
    protected int mColorWhite;

    protected static final String FRAGMENT_TAG_DIALOG = "dialog";

    private boolean isCameraFeatureAvailable = false;

    protected int mTheme;
    protected boolean mUsingEnterKey = false;

    protected Toast mToast;
    protected Runnable onOpenPGPKeyPublished = () -> ToastCompat.makeText(XmppActivity.this, R.string.openpgp_has_been_published, Toast.LENGTH_SHORT).show();
    protected ConferenceInvite mPendingConferenceInvite = null;
    protected ServiceConnection mConnection = new ServiceConnection() {

        @Override
        public void onServiceConnected(ComponentName className, IBinder service) {
            XmppConnectionBinder binder = (XmppConnectionBinder) service;
            xmppConnectionService = binder.getService();
            xmppConnectionServiceBound = true;
            registerListeners();
            invalidateOptionsMenu();
            onBackendConnected();
        }

        @Override
        public void onServiceDisconnected(ComponentName arg0) {
            xmppConnectionServiceBound = false;
        }
    };
    private DisplayMetrics metrics;
    private long mLastUiRefresh = 0;
    private Handler mRefreshUiHandler = new Handler();
    private Runnable mRefreshUiRunnable = () -> {
        mLastUiRefresh = SystemClock.elapsedRealtime();
        refreshUiReal();
    };
    private UiCallback<Conversation> adhocCallback = new UiCallback<Conversation>() {
        @Override
        public void success(final Conversation conversation) {
            runOnUiThread(() -> {
                switchToConversation(conversation);
                hideToast();
            });
        }

        @Override
        public void error(final int errorCode, Conversation object) {
            runOnUiThread(() -> replaceToast(getString(errorCode)));
        }

        @Override
        public void userInputRequired(PendingIntent pi, Conversation object) {

        }
    };

    public boolean mSkipBackgroundBinding = false;

    public static boolean cancelPotentialWork(Message message, ImageView imageView) {
        final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);

        if (bitmapWorkerTask != null) {
            final Message oldMessage = bitmapWorkerTask.message;
            if (oldMessage == null || message != oldMessage) {
                bitmapWorkerTask.cancel(true);
            } else {
                return false;
            }
        }
        return true;
    }

    private static BitmapWorkerTask getBitmapWorkerTask(ImageView imageView) {
        if (imageView != null) {
            final Drawable drawable = imageView.getDrawable();
            if (drawable instanceof AsyncDrawable) {
                final AsyncDrawable asyncDrawable = (AsyncDrawable) drawable;
                return asyncDrawable.getBitmapWorkerTask();
            }
        }
        return null;
    }

    protected void hideToast() {
        if (mToast != null) {
            mToast.cancel();
        }
    }

    protected void replaceToast(String msg) {
        replaceToast(msg, true);
    }

    protected void replaceToast(String msg, boolean showlong) {
        hideToast();
        mToast = ToastCompat.makeText(this, msg, showlong ? Toast.LENGTH_LONG : Toast.LENGTH_SHORT);
        mToast.show();
    }

    public final void refreshUi() {
        final long diff = SystemClock.elapsedRealtime() - mLastUiRefresh;
        if (diff > Config.REFRESH_UI_INTERVAL) {
            mRefreshUiHandler.removeCallbacks(mRefreshUiRunnable);
            runOnUiThread(mRefreshUiRunnable);
        } else {
            final long next = Config.REFRESH_UI_INTERVAL - diff;
            mRefreshUiHandler.removeCallbacks(mRefreshUiRunnable);
            mRefreshUiHandler.postDelayed(mRefreshUiRunnable, next);
        }
    }

    abstract protected void refreshUiReal();

    @Override
    protected void onStart() {
        super.onStart();
        if (!xmppConnectionServiceBound) {
            if (this.mSkipBackgroundBinding) {
                Log.d(Config.LOGTAG, "skipping background binding");
            } else {
                connectToBackend();
            }
        } else {
            this.registerListeners();
            this.onBackendConnected();
        }
    }

    public void connectToBackend() {
        Intent intent = new Intent(this, XmppConnectionService.class);
        intent.setAction("ui");
        try {
            startService(intent);
        } catch (IllegalStateException e) {
            Log.w(Config.LOGTAG, "unable to start service from " + getClass().getSimpleName());
        }
        bindService(intent, mConnection, Context.BIND_AUTO_CREATE);
    }

    @Override
    protected void onStop() {
        super.onStop();
        if (xmppConnectionServiceBound) {
            this.unregisterListeners();
            unbindService(mConnection);
            xmppConnectionServiceBound = false;
        }
    }

    public boolean hasPgp() {
        return xmppConnectionService.getPgpEngine() != null;
    }

    public void showInstallPgpDialog() {
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(getString(R.string.openkeychain_required));
        builder.setIconAttribute(android.R.attr.alertDialogIcon);
        builder.setMessage(getText(R.string.openkeychain_required_long));
        builder.setNegativeButton(getString(R.string.cancel), null);
        builder.setNeutralButton(getString(R.string.restart),
                (dialog, which) -> {
                    if (xmppConnectionServiceBound) {
                        unbindService(mConnection);
                        xmppConnectionServiceBound = false;
                    }
                    stopService(new Intent(XmppActivity.this,
                            XmppConnectionService.class));
                    finish();
                });
        builder.setPositiveButton(getString(R.string.install),
                (dialog, which) -> {
                    Uri uri = Uri
                            .parse("market://details?id=org.sufficientlysecure.keychain");
                    Intent marketIntent = new Intent(Intent.ACTION_VIEW,
                            uri);
                    PackageManager manager = getApplicationContext()
                            .getPackageManager();
                    List<ResolveInfo> infos = manager
                            .queryIntentActivities(marketIntent, 0);
                    if (infos.size() > 0) {
                        startActivity(marketIntent);
                    } else {
                        uri = Uri.parse("http://www.openkeychain.org/");
                        Intent browserIntent = new Intent(Intent.ACTION_VIEW, uri);
                        startActivity(browserIntent);
                        overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
                    }
                    finish();
                });
        builder.create().show();
    }

    abstract void onBackendConnected();

    protected void registerListeners() {
        if (this instanceof XmppConnectionService.OnConversationUpdate) {
            this.xmppConnectionService.setOnConversationListChangedListener((XmppConnectionService.OnConversationUpdate) this);
        }
        if (this instanceof XmppConnectionService.OnAccountUpdate) {
            this.xmppConnectionService.setOnAccountListChangedListener((XmppConnectionService.OnAccountUpdate) this);
        }
        if (this instanceof XmppConnectionService.OnCaptchaRequested) {
            this.xmppConnectionService.setOnCaptchaRequestedListener((XmppConnectionService.OnCaptchaRequested) this);
        }
        if (this instanceof XmppConnectionService.OnRosterUpdate) {
            this.xmppConnectionService.setOnRosterUpdateListener((XmppConnectionService.OnRosterUpdate) this);
        }
        if (this instanceof XmppConnectionService.OnMucRosterUpdate) {
            this.xmppConnectionService.setOnMucRosterUpdateListener((XmppConnectionService.OnMucRosterUpdate) this);
        }
        if (this instanceof OnUpdateBlocklist) {
            this.xmppConnectionService.setOnUpdateBlocklistListener((OnUpdateBlocklist) this);
        }
        if (this instanceof XmppConnectionService.OnShowErrorToast) {
            this.xmppConnectionService.setOnShowErrorToastListener((XmppConnectionService.OnShowErrorToast) this);
        }
        if (this instanceof OnKeyStatusUpdated) {
            this.xmppConnectionService.setOnKeyStatusUpdatedListener((OnKeyStatusUpdated) this);
        }
    }

    protected void unregisterListeners() {
        if (this instanceof XmppConnectionService.OnConversationUpdate) {
            this.xmppConnectionService.removeOnConversationListChangedListener((XmppConnectionService.OnConversationUpdate) this);
        }
        if (this instanceof XmppConnectionService.OnAccountUpdate) {
            this.xmppConnectionService.removeOnAccountListChangedListener((XmppConnectionService.OnAccountUpdate) this);
        }
        if (this instanceof XmppConnectionService.OnCaptchaRequested) {
            this.xmppConnectionService.removeOnCaptchaRequestedListener((XmppConnectionService.OnCaptchaRequested) this);
        }
        if (this instanceof XmppConnectionService.OnRosterUpdate) {
            this.xmppConnectionService.removeOnRosterUpdateListener((XmppConnectionService.OnRosterUpdate) this);
        }
        if (this instanceof XmppConnectionService.OnMucRosterUpdate) {
            this.xmppConnectionService.removeOnMucRosterUpdateListener((XmppConnectionService.OnMucRosterUpdate) this);
        }
        if (this instanceof OnUpdateBlocklist) {
            this.xmppConnectionService.removeOnUpdateBlocklistListener((OnUpdateBlocklist) this);
        }
        if (this instanceof XmppConnectionService.OnShowErrorToast) {
            this.xmppConnectionService.removeOnShowErrorToastListener((XmppConnectionService.OnShowErrorToast) this);
        }
        if (this instanceof OnKeyStatusUpdated) {
            this.xmppConnectionService.removeOnNewKeysAvailableListener((OnKeyStatusUpdated) this);
        }
    }

    @Override
    public boolean onOptionsItemSelected(final MenuItem item) {
        switch (item.getItemId()) {
            case R.id.action_create_issue:
                createIssue();
                break;
            case R.id.action_settings:
                startActivity(new Intent(this, SettingsActivity.class));
                overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
                break;
            case R.id.action_accounts:
                if (xmppConnectionServiceBound && this.xmppConnectionService.getAccounts().size() == 1 && !this.xmppConnectionService.multipleAccounts()) {
                    final Intent intent = new Intent(getApplicationContext(), EditAccountActivity.class);
                    Account mAccount = xmppConnectionService.getAccounts().get(0);
                    intent.putExtra("jid", mAccount.getJid().asBareJid().toString());
                    intent.putExtra("init", false);
                    startActivity(intent);
                    overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
                } else {
                    AccountUtils.launchManageAccounts(this);
                    overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
                }
                break;
            case android.R.id.home:
                finish();
                break;
            case R.id.action_show_qr_code:
                showQrCode();
                break;
        }
        return super.onOptionsItemSelected(item);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.mTheme = findTheme();
        setTheme(this.mTheme);
        metrics = getResources().getDisplayMetrics();
        ExceptionHelper.init(getApplicationContext());
        new EmojiService(this).init(getPreferences().getBoolean(USE_BUNDLED_EMOJIS, getResources().getBoolean(R.bool.use_bundled_emoji)));
        this.isCameraFeatureAvailable = getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA);
        if (isDarkTheme()) {
            mColorWarningButton = ContextCompat.getColor(this, R.color.warning_button_dark);
            mColorWarningText = ContextCompat.getColor(this, R.color.warning_button);
        } else {
            mColorWarningButton = ContextCompat.getColor(this, R.color.warning_button);
            mColorWarningText = ContextCompat.getColor(this, R.color.warning_button_dark);
        }
        mColorDefaultButtonText = ContextCompat.getColor(this, R.color.realwhite);
        mColorWhite = ContextCompat.getColor(this, R.color.white70);
        this.mUsingEnterKey = usingEnterKey();
    }

    protected boolean isCameraFeatureAvailable() {
        return this.isCameraFeatureAvailable;
    }

    public boolean isDarkTheme() {
        return ThemeHelper.isDark(mTheme);
    }

    public boolean isOrangeTheme() {
        return getStringPreference("theme_color", R.string.theme_color).equals("orange");
    }

    public String getThemeColor() {
        return getStringPreference("theme_color", R.string.theme_color);
    }

    public boolean unicoloredBG() {
        return getBooleanPreference("unicolored_chatbg", R.bool.use_unicolored_chatbg);
    }

    public boolean enableOTR() {
        return getBooleanPreference(ENABLE_OTR_ENCRYPTION, R.bool.enable_otr);
    }

    public void setBubbleColor(final View v, final int backgroundColor, final int borderColor) {
        GradientDrawable shape = (GradientDrawable) v.getBackground();
        shape.setColor(backgroundColor);
        if (borderColor != -1) {
            shape.setStroke(2, borderColor);
        }
        v.setBackground(shape);
    }

    public int getThemeResource(int r_attr_name, int r_drawable_def) {
        int[] attrs = {r_attr_name};
        TypedArray ta = this.getTheme().obtainStyledAttributes(attrs);

        int res = ta.getResourceId(0, r_drawable_def);
        ta.recycle();

        return res;
    }

    protected boolean isOptimizingBattery() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            PowerManager pm = (PowerManager) getSystemService(POWER_SERVICE);
            return !pm.isIgnoringBatteryOptimizations(getPackageName());
        } else {
            return false;
        }
    }

    protected boolean isAffectedByDataSaver() {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
            ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
            return cm.isActiveNetworkMetered()
                    && cm.getRestrictBackgroundStatus() == ConnectivityManager.RESTRICT_BACKGROUND_STATUS_ENABLED;
        } else {
            return false;
        }
    }

    protected boolean usingEnterKey() {
        return getBooleanPreference("display_enter_key", R.bool.display_enter_key);
    }

    public boolean useInternalUpdater() {
        return getBooleanPreference(USE_INTERNAL_UPDATER, R.bool.use_internal_updater);
    }

    public SharedPreferences getPreferences() {
        return PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
    }

    protected boolean getBooleanPreference(String name, @BoolRes int res) {
        return getPreferences().getBoolean(name, getResources().getBoolean(res));
    }

    protected String getStringPreference(String name, int res) {
        return getPreferences().getString(name, getResources().getString(res));
    }

    public void switchToConversation(Conversation conversation) {
        switchToConversation(conversation, null);
    }

    public void switchToConversationAndQuote(Conversation conversation, String text, String user) {
        switchToConversation(conversation, text, true, user, false, false);
    }

    public void switchToConversation(Conversation conversation, String text) {
        switchToConversation(conversation, text, false, null, false, false);
    }

    public void switchToConversationDoNotAppend(Conversation conversation, String text) {
        switchToConversation(conversation, text, false, null, false, true);
    }

    public void highlightInMuc(Conversation conversation, String nick) {
        switchToConversation(conversation, null, false, nick, false, false);
    }

    public void privateMsgInMuc(Conversation conversation, String nick) {
        switchToConversation(conversation, null, false, nick, true, false);
    }

    private void switchToConversation(Conversation conversation, String text, boolean asQuote, String nick, boolean pm, boolean doNotAppend) {
        Intent intent = new Intent(this, ConversationsActivity.class);
        intent.setAction(ConversationsActivity.ACTION_VIEW_CONVERSATION);
        intent.putExtra(ConversationsActivity.EXTRA_CONVERSATION, conversation.getUuid());
        if (text != null) {
            intent.putExtra(Intent.EXTRA_TEXT, text);
            if (asQuote) {
                intent.putExtra(ConversationsActivity.EXTRA_AS_QUOTE, true);
                intent.putExtra(ConversationsActivity.EXTRA_USER, nick);
            }
        }
        if (nick != null && !asQuote) {
            intent.putExtra(ConversationsActivity.EXTRA_NICK, nick);
            intent.putExtra(ConversationsActivity.EXTRA_IS_PRIVATE_MESSAGE, pm);
        }
        if (doNotAppend) {
            intent.putExtra(ConversationsActivity.EXTRA_DO_NOT_APPEND, true);
        }
        intent.setFlags(intent.getFlags() | Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);
        overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
        finish();
    }

    public void switchToContactDetails(Contact contact) {
        switchToContactDetails(contact, null);
    }

    public void switchToContactDetails(Contact contact, String messageFingerprint) {
        Intent intent = new Intent(this, ContactDetailsActivity.class);
        intent.setAction(ContactDetailsActivity.ACTION_VIEW_CONTACT);
        intent.putExtra(EXTRA_ACCOUNT, contact.getAccount().getJid().asBareJid().toString());
        intent.putExtra("contact", contact.getJid().toString());
        intent.putExtra("fingerprint", messageFingerprint);
        startActivity(intent);
        overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
    }

    public void switchToAccount(Account account, String fingerprint) {
        switchToAccount(account, false, fingerprint);
    }

    public void switchToAccount(Account account) {
        switchToAccount(account, false, null);
    }

    public void switchToAccount(Account account, boolean init, String fingerprint) {
        Intent intent = new Intent(this, EditAccountActivity.class);
        intent.putExtra("jid", account.getJid().asBareJid().toString());
        intent.putExtra("init", init);
        if (init) {
            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK | Intent.FLAG_ACTIVITY_NO_ANIMATION);
        }
        if (fingerprint != null) {
            intent.putExtra("fingerprint", fingerprint);
        }
        startActivity(intent);
        overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
        if (init) {
            overridePendingTransition(0, 0);
        }
    }

    protected void delegateUriPermissionsToService(Uri uri) {
        Intent intent = new Intent(this, XmppConnectionService.class);
        intent.setAction(Intent.ACTION_SEND);
        intent.setData(uri);
        intent.setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        try {
            startService(intent);
        } catch (Exception e) {
            Log.e(Config.LOGTAG, "unable to delegate uri permission", e);
        }
    }

    protected void inviteToConversation(Conversation conversation) {
        startActivityForResult(ChooseContactActivity.create(this, conversation), REQUEST_INVITE_TO_CONVERSATION);
    }

    protected void announcePgp(final Account account, final Conversation conversation, Intent intent, final Runnable onSuccess) {
        if (account.getPgpId() == 0) {
            choosePgpSignId(account);
        } else {
            String status = null;
            if (manuallyChangePresence()) {
                status = account.getPresenceStatusMessage();
            }
            if (status == null) {
                status = "";
            }
            xmppConnectionService.getPgpEngine().generateSignature(intent, account, status, new UiCallback<String>() {

                @Override
                public void userInputRequired(PendingIntent pi, String signature) {
                    try {
                        startIntentSenderForResult(pi.getIntentSender(), REQUEST_ANNOUNCE_PGP, null, 0, 0, 0);
                    } catch (final SendIntentException ignored) {
                    }
                }

                @Override
                public void success(String signature) {
                    account.setPgpSignature(signature);
                    xmppConnectionService.databaseBackend.updateAccount(account);
                    xmppConnectionService.sendPresence(account);
                    if (conversation != null) {
                        conversation.setNextEncryption(Message.ENCRYPTION_PGP);
                        xmppConnectionService.updateConversation(conversation);
                        refreshUi();
                    }
                    if (onSuccess != null) {
                        runOnUiThread(onSuccess);
                    }
                }

                @Override
                public void error(int error, String signature) {
                    if (error == 0) {
                        account.setPgpSignId(0);
                        account.unsetPgpSignature();
                        xmppConnectionService.databaseBackend.updateAccount(account);
                        choosePgpSignId(account);
                    } else {
                        displayErrorDialog(error);
                    }
                }
            });
        }
    }

    @SuppressWarnings("deprecation")
    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    protected void setListItemBackgroundOnView(View view) {
        int sdk = android.os.Build.VERSION.SDK_INT;
        if (sdk < android.os.Build.VERSION_CODES.JELLY_BEAN) {
            view.setBackgroundDrawable(getResources().getDrawable(R.drawable.greybackground));
        } else {
            view.setBackground(getResources().getDrawable(R.drawable.greybackground));
        }
    }

    protected void choosePgpSignId(Account account) {
        xmppConnectionService.getPgpEngine().chooseKey(account, new UiCallback<Account>() {
            @Override
            public void success(Account account1) {
            }

            @Override
            public void error(int errorCode, Account object) {

            }

            @Override
            public void userInputRequired(PendingIntent pi, Account object) {
                try {
                    startIntentSenderForResult(pi.getIntentSender(),
                            REQUEST_CHOOSE_PGP_ID, null, 0, 0, 0);
                } catch (final SendIntentException ignored) {
                }
            }
        });
    }

    protected void displayErrorDialog(final int errorCode) {
        runOnUiThread(() -> {
            final AlertDialog.Builder builder = new AlertDialog.Builder(XmppActivity.this);
            builder.setIconAttribute(android.R.attr.alertDialogIcon);
            builder.setTitle(getString(R.string.error));
            builder.setMessage(errorCode);
            builder.setNeutralButton(R.string.accept, null);
            builder.create().show();
        });

    }

    public void showAddToRosterDialog(final Conversation conversation) {
        showAddToRosterDialog(conversation.getContact());
    }

    public void showAddToRosterDialog(final Contact contact) {
        if (contact == null) {
            return;
        }
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(contact.getJid().toString());
        builder.setMessage(getString(R.string.not_in_roster));
        builder.setNegativeButton(getString(R.string.cancel), null);
        builder.setPositiveButton(getString(R.string.add_contact), (dialog, which) -> xmppConnectionService.createContact(contact, true));
        builder.create().show();
    }

    private void showAskForPresenceDialog(final Contact contact) {
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(contact.getJid().toString());
        builder.setMessage(R.string.request_presence_updates);
        builder.setNegativeButton(R.string.cancel, null);
        builder.setPositiveButton(R.string.request_now,
                (dialog, which) -> {
                    if (xmppConnectionServiceBound) {
                        xmppConnectionService.sendPresencePacket(contact
                                .getAccount(), xmppConnectionService
                                .getPresenceGenerator()
                                .requestPresenceUpdatesFrom(contact));
                    }
                });
        builder.create().show();
    }

    private void warnMutalPresenceSubscription(final Conversation conversation,
                                               final OnPresenceSelected listener) {
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(conversation.getContact().getJid().toString());
        builder.setMessage(R.string.without_mutual_presence_updates);
        builder.setNegativeButton(R.string.cancel, null);
        builder.setPositiveButton(R.string.ignore, (dialog, which) -> {
            conversation.setNextCounterpart(null);
            if (listener != null) {
                listener.onPresenceSelected();
            }
        });
        builder.create().show();
    }

    protected void quickEdit(String previousValue, @StringRes int hint, OnValueEdited callback) {
        quickEdit(previousValue, callback, hint, false, false);
    }

    protected void quickEdit(String previousValue, @StringRes int hint, OnValueEdited callback, boolean permitEmpty) {
        quickEdit(previousValue, callback, hint, false, permitEmpty);
    }

    protected void quickPasswordEdit(String previousValue, OnValueEdited callback) {
        quickEdit(previousValue, callback, R.string.password, true, false);
    }

    @SuppressLint("InflateParams")
    private void quickEdit(final String previousValue,
                           final OnValueEdited callback,
                           final @StringRes int hint,
                           boolean password,
                           boolean permitEmpty) {
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        DialogQuickeditBinding binding = DataBindingUtil.inflate(getLayoutInflater(), R.layout.dialog_quickedit, null, false);
        if (password) {
            binding.inputEditText.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
        }
        builder.setPositiveButton(R.string.accept, null);
        if (hint != 0) {
            binding.inputLayout.setHint(getString(hint));
        }
        binding.inputEditText.requestFocus();
        if (previousValue != null) {
            binding.inputEditText.getText().append(previousValue);
        }
        builder.setView(binding.getRoot());
        builder.setNegativeButton(R.string.cancel, null);
        final AlertDialog dialog = builder.create();
        dialog.setOnShowListener(d -> SoftKeyboardUtils.showKeyboard(binding.inputEditText));
        dialog.show();
        View.OnClickListener clickListener = v -> {
            String value = binding.inputEditText.getText().toString();
            if (!value.equals(previousValue) && (!value.trim().isEmpty() || permitEmpty)) {
                String error = callback.onValueEdited(value);
                if (error != null) {
                    binding.inputLayout.setError(error);
                    return;
                }
            }
            SoftKeyboardUtils.hideSoftKeyboard(binding.inputEditText);
            dialog.dismiss();
        };
        dialog.getButton(DialogInterface.BUTTON_POSITIVE).setOnClickListener(clickListener);
        dialog.getButton(DialogInterface.BUTTON_NEGATIVE).setOnClickListener((v -> {
            SoftKeyboardUtils.hideSoftKeyboard(binding.inputEditText);
            dialog.dismiss();
        }));
        dialog.setCanceledOnTouchOutside(false);
        dialog.setOnDismissListener(dialog1 -> {
            SoftKeyboardUtils.hideSoftKeyboard(binding.inputEditText);
        });
    }

    protected boolean hasStoragePermission(int requestCode) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED && checkSelfPermission(Manifest.permission.READ_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.READ_EXTERNAL_STORAGE}, requestCode);
                return false;
            } else {
                return true;
            }
        } else {
            return true;
        }
    }

    public boolean hasMicPermission(int requestCode) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (checkSelfPermission(Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
                requestPermissions(new String[]{Manifest.permission.RECORD_AUDIO}, requestCode);
                return false;
            } else {
                return true;
            }
        } else {
            return true;
        }
    }

    public boolean hasLocationPermission(int requestCode) {
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
            if (checkSelfPermission(Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED || checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, requestCode);
                requestPermissions(new String[]{Manifest.permission.ACCESS_COARSE_LOCATION}, requestCode);
                return false;
            } else {
                return true;
            }
        } else {
            return true;
        }
    }

    public void selectPresence(final Conversation conversation, final PresenceSelector.OnPresenceSelected listener) {
        final Contact contact = conversation.getContact();

        if (conversation.hasValidOtrSession()) {
            SessionID id = conversation.getOtrSession().getSessionID();
            Jid jid;
            try {
                jid = Jid.of(id.getAccountID() + "/" + id.getUserID());
            } catch (IllegalArgumentException e) {
                jid = null;
            }
            conversation.setNextCounterpart(jid);
            listener.onPresenceSelected();
        } else if (!contact.showInRoster()) {
            showAddToRosterDialog(conversation);
        } else {
            final Presences presences = contact.getPresences();
            if (presences.size() == 0) {
                if (!contact.getOption(Contact.Options.TO)
                        && !contact.getOption(Contact.Options.ASKING)
                        && contact.getAccount().getStatus() == Account.State.ONLINE) {
                    showAskForPresenceDialog(contact);
                } else if (!contact.getOption(Contact.Options.TO)
                        || !contact.getOption(Contact.Options.FROM)) {
                    PresenceSelector.warnMutualPresenceSubscription(this, conversation, listener);
                } else {
                    conversation.setNextCounterpart(null);
                    listener.onPresenceSelected();
                }
            } else if (presences.size() == 1) {
                String presence = presences.toResourceArray()[0];
                try {
                    conversation.setNextCounterpart(Jid.of(contact.getJid().getLocal(), contact.getJid().getDomain(), presence));
                } catch (IllegalArgumentException e) {
                    conversation.setNextCounterpart(null);
                }
                listener.onPresenceSelected();
            } else {
                PresenceSelector.showPresenceSelectionDialog(this, conversation, listener);
            }
        }
    }

    private void showPresenceSelectionDialog(Presences presences, final Conversation conversation, final OnPresenceSelected listener) {
        final Contact contact = conversation.getContact();
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle(getString(R.string.choose_presence));
        final String[] resourceArray = presences.toResourceArray();
        Pair<Map<String, String>, Map<String, String>> typeAndName = presences.toTypeAndNameMap();
        final Map<String, String> resourceTypeMap = typeAndName.first;
        final Map<String, String> resourceNameMap = typeAndName.second;
        final String[] readableIdentities = new String[resourceArray.length];
        final AtomicInteger selectedResource = new AtomicInteger(0);
        for (int i = 0; i < resourceArray.length; ++i) {
            String resource = resourceArray[i];
            if (resource.equals(contact.getLastResource())) {
                selectedResource.set(i);
            }
            String type = resourceTypeMap.get(resource);
            String name = resourceNameMap.get(resource);
            if (type != null) {
                if (Collections.frequency(resourceTypeMap.values(), type) == 1) {
                    readableIdentities[i] = PresenceSelector.translateType(this, type);
                } else if (name != null) {
                    if (Collections.frequency(resourceNameMap.values(), name) == 1
                            || CryptoHelper.UUID_PATTERN.matcher(resource).matches()) {
                        readableIdentities[i] = PresenceSelector.translateType(this, type) + "  (" + name + ")";
                    } else {
                        readableIdentities[i] = PresenceSelector.translateType(this, type) + " (" + name + " / " + resource + ")";
                    }
                } else {
                    readableIdentities[i] = PresenceSelector.translateType(this, type) + " (" + resource + ")";
                }
            } else {
                readableIdentities[i] = resource;
            }
        }
        builder.setSingleChoiceItems(readableIdentities,
                selectedResource.get(),
                (dialog, which) -> selectedResource.set(which));
        builder.setNegativeButton(R.string.cancel, null);
        builder.setPositiveButton(R.string.ok, (dialog, which) -> {
            try {
                Jid next = Jid.of(contact.getJid().getLocal(), contact.getJid().getDomain(), resourceArray[selectedResource.get()]);
                conversation.setNextCounterpart(next);
            } catch (IllegalArgumentException e) {
                conversation.setNextCounterpart(null);
            }
            listener.onPresenceSelected();
        });
        builder.create().show();
    }

    protected void onActivityResult(int requestCode, int resultCode, final Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == REQUEST_INVITE_TO_CONVERSATION && resultCode == RESULT_OK) {
            mPendingConferenceInvite = ConferenceInvite.parse(data);
            if (xmppConnectionServiceBound && mPendingConferenceInvite != null) {
                if (mPendingConferenceInvite.execute(this)) {
                    mToast = ToastCompat.makeText(this, R.string.creating_conference, Toast.LENGTH_LONG);
                    mToast.show();
                }
                mPendingConferenceInvite = null;
            }
        }
    }

    public int getWarningButtonColor() {
        return this.mColorWarningButton;
    }

    public int getWarningTextColor() {
        return this.mColorWarningText;
    }

    public int getDefaultButtonTextColor() {
        return this.mColorDefaultButtonText;
    }

    public int getPixel(int dp) {
        DisplayMetrics metrics = getResources().getDisplayMetrics();
        return ((int) (dp * metrics.density));
    }

    public boolean copyTextToClipboard(String text, int labelResId) {
        ClipboardManager mClipBoardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
        String label = getResources().getString(labelResId);
        if (mClipBoardManager != null) {
            ClipData mClipData = ClipData.newPlainText(label, text);
            mClipBoardManager.setPrimaryClip(mClipData);
            return true;
        }
        return false;
    }

    protected boolean manuallyChangePresence() {
        return getBooleanPreference(SettingsActivity.MANUALLY_CHANGE_PRESENCE, R.bool.manually_change_presence);
    }

    protected String getShareableUri() {
        return getShareableUri(false);
    }

    protected String getShareableUri(boolean http) {
        return null;
    }

    public void inviteUser() {
        if (!xmppConnectionServiceBound) {
            ToastCompat.makeText(this, R.string.not_connected_try_again, Toast.LENGTH_SHORT).show();
            return;
        }
        if (xmppConnectionService.getAccounts() == null) {
            ToastCompat.makeText(this, R.string.no_accounts, Toast.LENGTH_SHORT).show();
            return;
        }
        if (!xmppConnectionService.multipleAccounts()) {
            Account mAccount = xmppConnectionService.getAccounts().get(0);
            String user = Jid.ofEscaped(mAccount.getJid()).getLocal();
            String domain = Jid.ofEscaped(mAccount.getJid()).getDomain();
            String inviteURL;
            try {
                inviteURL = new getAdHocInviteUri(mAccount.getXmppConnection(), mAccount).execute().get();
            } catch (ExecutionException e) {
                e.printStackTrace();
                inviteURL = Config.inviteUserURL + user + "/" + domain;
            } catch (InterruptedException e) {
                e.printStackTrace();
                inviteURL = Config.inviteUserURL + user + "/" + domain;
            }
            if (inviteURL == null) {
                inviteURL = Config.inviteUserURL + user + "/" + domain;
            }
            Log.d(Config.LOGTAG, "Invite uri = " + inviteURL);
            String inviteText = getString(R.string.InviteText, user);
            Intent intent = new Intent(android.content.Intent.ACTION_SEND);
            intent.setType("text/plain");
            intent.putExtra(Intent.EXTRA_SUBJECT, user + " " + getString(R.string.inviteUser_Subject) + " " + getString(R.string.app_name));
            intent.putExtra(Intent.EXTRA_TEXT, inviteText + "\n\n" + inviteURL);
            startActivity(Intent.createChooser(intent, getString(R.string.invite_contact)));
            overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
        } else {
            final AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle(R.string.chooce_account);
            final View dialogView = this.getLayoutInflater().inflate(R.layout.choose_account_dialog, null);
            final Spinner spinner = dialogView.findViewById(R.id.account);
            builder.setView(dialogView);
            List<String> mActivatedAccounts = new ArrayList<>();
            for (Account account : xmppConnectionService.getAccounts()) {
                if (account.getStatus() != Account.State.DISABLED) {
                    if (Config.DOMAIN_LOCK != null) {
                        mActivatedAccounts.add(account.getJid().getLocal());
                    } else {
                        mActivatedAccounts.add(account.getJid().asBareJid().toString());
                    }
                }
            }
            StartConversationActivity.populateAccountSpinner(this, mActivatedAccounts, spinner);
            builder.setPositiveButton(R.string.ok,
                    (dialog, id) -> {
                        String selection = spinner.getSelectedItem().toString();
                        Account mAccount = xmppConnectionService.findAccountByJid(Jid.of(selection).asBareJid());
                        String user = Jid.of(mAccount.getJid()).getLocal();
                        String domain = Jid.of(mAccount.getJid()).getDomain();
                        String inviteURL;
                        try {
                            inviteURL = new getAdHocInviteUri(mAccount.getXmppConnection(), mAccount).execute().get();
                        } catch (ExecutionException e) {
                            e.printStackTrace();
                            inviteURL = Config.inviteUserURL + user + "/" + domain;
                        } catch (InterruptedException e) {
                            e.printStackTrace();
                            inviteURL = Config.inviteUserURL + user + "/" + domain;
                        }
                        if (inviteURL == null) {
                            inviteURL = Config.inviteUserURL + user + "/" + domain;
                        }
                        Log.d(Config.LOGTAG, "Invite uri = " + inviteURL);
                        String inviteText = getString(R.string.InviteText, user);
                        Intent intent = new Intent(Intent.ACTION_SEND);
                        intent.setType("text/plain");
                        intent.putExtra(Intent.EXTRA_SUBJECT, user + " " + getString(R.string.inviteUser_Subject) + " " + getString(R.string.app_name));
                        intent.putExtra(Intent.EXTRA_TEXT, inviteText + "\n\n" + inviteURL);
                        startActivity(Intent.createChooser(intent, getString(R.string.invite_contact)));
                        overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
                    });
            builder.setNegativeButton(R.string.cancel, null);
            builder.create().show();
        }
    }

    private class getAdHocInviteUri extends AsyncTask<XmppConnection, Account, String> {

        private XmppConnection connection;
        private Account account;

        public getAdHocInviteUri(XmppConnection c, Account a) {
            this.connection = c;
            this.account = a;
        }

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
        }

        @Override
        protected String doInBackground(XmppConnection... params) {
            String uri = null;
            if (this.connection != null) {
                XmppConnection.Features features = this.connection.getFeatures();
                if (features != null && features.adhocinvite) {
                    int i = 0;
                    uri = this.connection.getAdHocInviteUrl(Jid.ofDomain(this.account.getJid().getDomain()));
                    try {
                        while (uri == null && i++ < 10) {
                            uri = this.connection.getAdHocInviteUrl(Jid.ofDomain(this.account.getJid().getDomain()));
                            Thread.sleep(1000);
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    } finally {
                        features.adhocinviteURI = null;
                    }
                }
            }
            return uri;
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
        }
    }

    private void createIssue() {
        String IssueURL = Config.ISSUE_URL;
        Intent intent = new Intent(Intent.ACTION_VIEW);
        intent.setData(Uri.parse(IssueURL));
        startActivity(intent);
        overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
    }

    protected void shareLink(boolean http) {
        String uri = getShareableUri(http);
        if (uri == null || uri.isEmpty()) {
            return;
        }
        Intent intent = new Intent(Intent.ACTION_SEND);
        intent.setType("text/plain");
        intent.putExtra(Intent.EXTRA_TEXT, getShareableUri(http));
        try {
            startActivity(Intent.createChooser(intent, getText(R.string.share_uri_with)));
            overridePendingTransition(R.animator.fade_in, R.animator.fade_out);
        } catch (ActivityNotFoundException e) {
            ToastCompat.makeText(this, R.string.no_application_to_share_uri, Toast.LENGTH_SHORT).show();
        }
    }

    protected void launchOpenKeyChain(long keyId) {
        PgpEngine pgp = XmppActivity.this.xmppConnectionService.getPgpEngine();
        try {
            startIntentSenderForResult(
                    pgp.getIntentForKey(keyId).getIntentSender(), 0, null, 0,
                    0, 0);
        } catch (Throwable e) {
            ToastCompat.makeText(XmppActivity.this, R.string.openpgp_error, Toast.LENGTH_SHORT).show();
        }
    }

    @Override
    public void onResume() {
        super.onResume();
        initializeScreenshotSecurity();
    }

    protected int findTheme() {
        return ThemeHelper.find(this);
    }

    @Override
    public void onPause() {
        super.onPause();
    }

    @Override
    public boolean onMenuOpened(int id, Menu menu) {
        if (id == AppCompatDelegate.FEATURE_SUPPORT_ACTION_BAR && menu != null) {
            MenuDoubleTabUtil.recordMenuOpen();
        }
        return super.onMenuOpened(id, menu);
    }

    protected void showQrCode() {
        showQrCode(getShareableUri());
    }

    protected void showQrCode(final String uri) {
        if (uri == null || uri.isEmpty()) {
            return;
        }
        Point size = new Point();
        getWindowManager().getDefaultDisplay().getSize(size);
        final int width = (size.x < size.y ? size.x : size.y);
        Bitmap bitmap = BarcodeProvider.create2dBarcodeBitmap(uri, width);
        ImageView view = new ImageView(this);
        view.setBackgroundColor(Color.WHITE);
        view.setImageBitmap(bitmap);
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setView(view);
        builder.create().show();
    }

    protected Account extractAccount(Intent intent) {
        String jid = intent != null ? intent.getStringExtra(EXTRA_ACCOUNT) : null;
        try {
            return jid != null ? xmppConnectionService.findAccountByJid(Jid.of(jid)) : null;
        } catch (IllegalArgumentException e) {
            return null;
        }
    }

    public AvatarService avatarService() {
        return xmppConnectionService.getAvatarService();
    }

    public void loadGif(File file, ImageView imageView) {
        GifDrawable gifDrawable = null;
        try {
            gifDrawable = new GifDrawable(file);
        } catch (IOException e) {
            e.printStackTrace();
        }
        imageView.setImageDrawable(gifDrawable);
    }

    public void loadBitmap(Message message, ImageView imageView) {
        Bitmap bm;
        try {
            bm = xmppConnectionService.getFileBackend().getThumbnail(message, (int) (metrics.density * 288), true);
        } catch (IOException e) {
            bm = null;
        }
        if (bm != null) {
            cancelPotentialWork(message, imageView);
            imageView.setImageBitmap(bm);
            imageView.setBackgroundColor(0x00000000);
        } else {
            if (cancelPotentialWork(message, imageView)) {
                imageView.setBackgroundColor(0xff333333);
                imageView.setImageDrawable(null);
                final BitmapWorkerTask task = new BitmapWorkerTask(imageView);
                final AsyncDrawable asyncDrawable = new AsyncDrawable(getResources(), null, task);
                imageView.setImageDrawable(asyncDrawable);
                try {
                    task.execute(message);
                } catch (final RejectedExecutionException ignored) {
                    ignored.printStackTrace();
                }
            }
        }
    }

    protected interface OnValueEdited {
        String onValueEdited(String value);
    }

    public interface OnPresenceSelected {
        void onPresenceSelected();
    }

    public static class ConferenceInvite {
        private String uuid;
        private List<Jid> jids = new ArrayList<>();

        public static ConferenceInvite parse(Intent data) {
            ConferenceInvite invite = new ConferenceInvite();
            invite.uuid = data.getStringExtra(ChooseContactActivity.EXTRA_CONVERSATION);
            if (invite.uuid == null) {
                return null;
            }
            invite.jids.addAll(ChooseContactActivity.extractJabberIds(data));
            return invite;
        }

        public boolean execute(XmppActivity activity) {
            XmppConnectionService service = activity.xmppConnectionService;
            Conversation conversation = service.findConversationByUuid(this.uuid);
            if (conversation == null) {
                return false;
            }
            if (conversation.getMode() == Conversation.MODE_MULTI) {
                for (Jid jid : jids) {
                    service.invite(conversation, jid);
                }
                return false;
            } else {
                jids.add(conversation.getJid().asBareJid());
                return service.createAdhocConference(conversation.getAccount(), null, jids, activity.adhocCallback);
            }
        }
    }

    static class BitmapWorkerTask extends AsyncTask<Message, Void, Bitmap> {
        private final WeakReference<ImageView> imageViewReference;
        private Message message = null;

        private BitmapWorkerTask(ImageView imageView) {
            this.imageViewReference = new WeakReference<>(imageView);
        }

        @Override
        protected Bitmap doInBackground(Message... params) {
            if (isCancelled()) {
                return null;
            }
            message = params[0];
            try {
                final XmppActivity activity = find(imageViewReference);
                if (activity != null && activity.xmppConnectionService != null) {
                    return activity.xmppConnectionService.getFileBackend().getThumbnail(message, (int) (activity.metrics.density * 288), false);
                } else {
                    return null;
                }
            } catch (IOException e) {
                return null;
            }
        }

        @Override
        protected void onPostExecute(final Bitmap bitmap) {
            if (!isCancelled()) {
                final ImageView imageView = imageViewReference.get();
                if (imageView != null) {
                    imageView.setImageBitmap(bitmap);
                    imageView.setBackgroundColor(bitmap == null ? 0xff333333 : 0x00000000);
                }
            }
        }
    }

    private static class AsyncDrawable extends BitmapDrawable {
        private final WeakReference<BitmapWorkerTask> bitmapWorkerTaskReference;

        AsyncDrawable(Resources res, Bitmap bitmap,
                      BitmapWorkerTask bitmapWorkerTask) {
            super(res, bitmap);
            bitmapWorkerTaskReference = new WeakReference<>(
                    bitmapWorkerTask);
        }

        BitmapWorkerTask getBitmapWorkerTask() {
            return bitmapWorkerTaskReference.get();
        }
    }

    public static XmppActivity find(@NonNull WeakReference<ImageView> viewWeakReference) {
        final View view = viewWeakReference.get();
        return view == null ? null : find(view);
    }

    public static XmppActivity find(@NonNull final View view) {
        Context context = view.getContext();
        while (context instanceof ContextWrapper) {
            if (context instanceof XmppActivity) {
                return (XmppActivity) context;
            }
            context = ((ContextWrapper) context).getBaseContext();
        }
        return null;
    }

    protected boolean installFromUnknownSourceAllowed() {
        boolean installFromUnknownSource = false;
        final PackageManager packageManager = this.getPackageManager();
        int isUnknownAllowed = 0;
        if (Build.VERSION.SDK_INT >= 26) {
            /*
             * On Android 8 with applications targeting lower versions,
             * it's impossible to check unknown sources enabled: using old APIs will always return true
             * and using the new one will always return false,
             * so in order to avoid a stuck dialog that can't be bypassed we will assume true.
             */
            installFromUnknownSource = this.getApplicationInfo().targetSdkVersion < Build.VERSION_CODES.O
                    || packageManager.canRequestPackageInstalls();
        } else if (Build.VERSION.SDK_INT >= 17 && Build.VERSION.SDK_INT < 26) {
            try {
                isUnknownAllowed = Settings.Global.getInt(this.getApplicationContext().getContentResolver(), Settings.Global.INSTALL_NON_MARKET_APPS);
            } catch (Settings.SettingNotFoundException e) {
                isUnknownAllowed = 0;
                e.printStackTrace();
            }
            installFromUnknownSource = isUnknownAllowed == 1;
        } else {
            try {
                isUnknownAllowed = Settings.Secure.getInt(this.getApplicationContext().getContentResolver(), Settings.Secure.INSTALL_NON_MARKET_APPS);
            } catch (Settings.SettingNotFoundException e) {
                isUnknownAllowed = 0;
                e.printStackTrace();
            }
            installFromUnknownSource = isUnknownAllowed == 1;
        }
        Log.d(Config.LOGTAG, "Install from unknown sources for Android SDK " + Build.VERSION.SDK_INT + " allowed: " + installFromUnknownSource);
        return installFromUnknownSource;
    }

    protected void openInstallFromUnknownSourcesDialogIfNeeded(boolean showToast) {
        String ShowToast;
        if (showToast == true) {
            ShowToast = "true";
        } else {
            ShowToast = "false";
        }
        if (!installFromUnknownSourceAllowed() && xmppConnectionService.installedFrom() == null) {
            final AlertDialog.Builder builder = new AlertDialog.Builder(this);
            builder.setTitle(R.string.install_from_unknown_sources_disabled);
            builder.setMessage(R.string.install_from_unknown_sources_disabled_dialog);
            builder.setPositiveButton(R.string.next, (dialog, which) -> {
                Intent intent;
                if (android.os.Build.VERSION.SDK_INT >= 26) {
                    intent = new Intent(Settings.ACTION_MANAGE_UNKNOWN_APP_SOURCES);
                    Uri uri = Uri.parse("package:" + getPackageName());
                    intent.setData(uri);
                } else {
                    intent = new Intent(Settings.ACTION_SECURITY_SETTINGS);
                }
                Log.d(Config.LOGTAG, "Allow install from unknown sources for Android SDK " + Build.VERSION.SDK_INT + " intent " + intent.toString());
                try {
                    startActivityForResult(intent, REQUEST_UNKNOWN_SOURCE_OP);
                } catch (ActivityNotFoundException e) {
                    ToastCompat.makeText(XmppActivity.this, R.string.device_does_not_support_unknown_source_op, Toast.LENGTH_SHORT).show();
                } finally {
                    UpdateService task = new UpdateService(this, xmppConnectionService.installedFrom(), xmppConnectionService);
                    task.executeOnExecutor(UpdateService.THREAD_POOL_EXECUTOR, ShowToast);
                    Log.d(Config.LOGTAG, "AppUpdater started");
                }
            });
            builder.create().show();
        } else {
            UpdateService task = new UpdateService(this, xmppConnectionService.installedFrom(), xmppConnectionService);
            task.executeOnExecutor(UpdateService.THREAD_POOL_EXECUTOR, ShowToast);
            Log.d(Config.LOGTAG, "AppUpdater started");
        }
    }
}