Fixing multiwindow drag operation during with rotation.

> Finishing activity when rotation preference change. This ensures that
  any prefenrece change is immediately applied instead of waiting for resume
  as the new activity is always started with proper setting.
> Clearing task when starting drag in landscape mode. This ensures that a new
  activity instance is started in this case, which overrides previous locked
  rotation by launcher activity.
> Handling drag request in onCreate and enabling rotation based on it.
> Clearing any request from the launcher intent once the drag operation
  is complete

Bug: 36226746
Change-Id: I69f56c13827c25f3e1bc84935cb2acc59b6bd349

1 files changed, 12 insertions, 0 deletions

diff --git a/src/com/android/launcher3/dragndrop/AddItemActivity.java b/src/com/android/launcher3/dragndrop/AddItemActivity.java
index c2a4820c8..629f78ab3 100644
--- a/src/com/android/launcher3/dragndrop/AddItemActivity.java
+++ b/src/com/android/launcher3/dragndrop/AddItemActivity.java
@@ -23,6 +23,7 @@ import android.appwidget.AppWidgetManager;
 import android.content.ClipData;
 import android.content.ClipDescription;
 import android.content.Intent;
+import android.content.res.Configuration;
 import android.graphics.Canvas;
 import android.graphics.Point;
 import android.graphics.PointF;
@@ -40,6 +41,7 @@ import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherAppState;
 import com.android.launcher3.LauncherAppWidgetProviderInfo;
 import com.android.launcher3.R;
+import com.android.launcher3.Utilities;
 import com.android.launcher3.compat.AppWidgetManagerCompat;
 import com.android.launcher3.compat.PinItemRequestCompat;
 import com.android.launcher3.model.WidgetItem;
@@ -132,6 +134,16 @@ public class AddItemActivity extends BaseActivity implements OnLongClickListener
                 .setPackage(getPackageName())
                 .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
                 .putExtra(PinItemDragListener.EXTRA_PIN_ITEM_DRAG_LISTENER, listener);
+
+        if (!getResources().getBoolean(R.bool.allow_rotation) &&
+                !Utilities.isAllowRotationPrefEnabled(this) &&
+                (getResources().getConfiguration().orientation ==
+                        Configuration.ORIENTATION_LANDSCAPE && !isInMultiWindowMode())) {
+            // If we are starting the drag in landscape even though home is locked in portrait,
+            // restart the home activity to temporarily allow rotation.
+            homeIntent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
+        }
+
         startActivity(homeIntent,
                 ActivityOptions.makeCustomAnimation(this, 0, android.R.anim.fade_out).toBundle());