let the user forbid android from taking screenshots

2 files changed, 27 insertions, 0 deletions

diff --git a/src/main/java/de/pixart/messenger/ui/ActionBarActivity.java b/src/main/java/de/pixart/messenger/ui/ActionBarActivity.java
index bc0557f1f..cab311d58 100644
--- a/src/main/java/de/pixart/messenger/ui/ActionBarActivity.java
+++ b/src/main/java/de/pixart/messenger/ui/ActionBarActivity.java
@@ -1,8 +1,14 @@
 package de.pixart.messenger.ui;
 
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
+import android.support.annotation.BoolRes;
 import android.support.v7.app.ActionBar;
 import android.support.v7.app.AppCompatActivity;
 import android.view.MenuItem;
+import android.view.WindowManager;
+
+import de.pixart.messenger.R;
 
 public abstract class ActionBarActivity extends AppCompatActivity {
     public static void configureActionBar(ActionBar actionBar) {
@@ -25,4 +31,24 @@ public abstract class ActionBarActivity extends AppCompatActivity {
         }
         return super.onOptionsItemSelected(item);
     }
+
+    void initializeScreenshotSecurity() {
+        if (isScreenSecurityEnabled()) {
+            getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
+        } else {
+            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
+        }
+    }
+
+    public boolean isScreenSecurityEnabled() {
+        return getBooleanPreference("screen_security", R.bool.screen_security);
+    }
+
+    protected SharedPreferences getPreferences() {
+        return PreferenceManager.getDefaultSharedPreferences(getApplicationContext());
+    }
+
+    protected boolean getBooleanPreference(String name, @BoolRes int res) {
+        return getPreferences().getBoolean(name, getResources().getBoolean(res));
+    }
 }
diff --git a/src/main/java/de/pixart/messenger/ui/XmppActivity.java b/src/main/java/de/pixart/messenger/ui/XmppActivity.java
index ee606395a..06ee2692d 100644
--- a/src/main/java/de/pixart/messenger/ui/XmppActivity.java
+++ b/src/main/java/de/pixart/messenger/ui/XmppActivity.java
@@ -1028,6 +1028,7 @@ public abstract class XmppActivity extends ActionBarActivity {
     @Override
     public void onResume() {
         super.onResume();
+        initializeScreenshotSecurity();
     }
 
     protected int findTheme() {