increase cursor window size on Android P when restoring messages

3 files changed, 25 insertions, 5 deletions

diff --git a/src/main/java/de/pixart/messenger/Config.java b/src/main/java/de/pixart/messenger/Config.java
index 19af8b31b..0a9c2d513 100644
--- a/src/main/java/de/pixart/messenger/Config.java
+++ b/src/main/java/de/pixart/messenger/Config.java
@@ -112,7 +112,7 @@ public final class Config {
     public static final boolean PUT_AUTH_TAG_INTO_KEY = true;
 
     public static final int MAX_DISPLAY_MESSAGE_CHARS = 4096;
-    public static final int MAX_STORAGE_MESSAGE_CHARS = 1024 * 1024; //1MB
+    public static final int MAX_STORAGE_MESSAGE_CHARS = 2 * 1024 * 1024; //2MB
 
     public static final boolean ExportLogs = true; // automatically export logs
     public static final int ExportLogs_Hour = 4; //Time - hours: valid values from 0 to 23
diff --git a/src/main/java/de/pixart/messenger/persistance/DatabaseBackend.java b/src/main/java/de/pixart/messenger/persistance/DatabaseBackend.java
index 44e78015f..9f78b631c 100644
--- a/src/main/java/de/pixart/messenger/persistance/DatabaseBackend.java
+++ b/src/main/java/de/pixart/messenger/persistance/DatabaseBackend.java
@@ -51,6 +51,7 @@ import de.pixart.messenger.entities.Roster;
 import de.pixart.messenger.entities.ServiceDiscoveryResult;
 import de.pixart.messenger.services.ShortcutService;
 import de.pixart.messenger.utils.CryptoHelper;
+import de.pixart.messenger.utils.CursorUtils;
 import de.pixart.messenger.utils.FtsUtils;
 import de.pixart.messenger.utils.Resolver;
 import de.pixart.messenger.xmpp.InvalidJid;
@@ -793,12 +794,10 @@ public class DatabaseBackend extends SQLiteOpenHelper {
                     null, null, Message.TIME_SENT + " DESC",
                     String.valueOf(limit));
         }
+        CursorUtils.upgradeCursorWindowSize(cursor);
         while (cursor.moveToNext()) {
             try {
-                final Message message = Message.fromCursor(cursor, conversation);
-                if (message != null && !message.isMessageDeleted()) {
-                    list.add(0, message);
-                }
+                list.add(0, Message.fromCursor(cursor, conversation));
             } catch (Exception e) {
                 Log.e(Config.LOGTAG, "unable to restore message");
             }
diff --git a/src/main/java/de/pixart/messenger/utils/CursorUtils.java b/src/main/java/de/pixart/messenger/utils/CursorUtils.java
new file mode 100644
index 000000000..39b4df908
--- /dev/null
+++ b/src/main/java/de/pixart/messenger/utils/CursorUtils.java
@@ -0,0 +1,21 @@
+package de.pixart.messenger.utils;
+
+import android.database.AbstractWindowedCursor;
+import android.database.Cursor;
+import android.database.CursorWindow;
+import android.database.sqlite.SQLiteCursor;
+
+public class CursorUtils {
+
+    public static void upgradeCursorWindowSize(final Cursor cursor) {
+        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.P) {
+            if (cursor instanceof AbstractWindowedCursor) {
+                final AbstractWindowedCursor windowedCursor = (AbstractWindowedCursor) cursor;
+                windowedCursor.setWindow(new CursorWindow("8k", 8 * 1024 * 1024));
+            }
+            if (cursor instanceof SQLiteCursor) {
+                ((SQLiteCursor) cursor).setFillWindowForwardOnly(true);
+            }
+        }
+    }
+}
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