Fixing launcher going to a different state when dragging an icon from different activity

Bug: 80191074
Change-Id: I45ea646dc2bd21627e8b724dac9c9fc23c18797d

quickstep/src/com/android/launcher3/LauncherAppTransitionManagerImpl.java

@@ -50,6 +50,7 @@ import android.graphics.Matrix;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.os.Build;
+import android.os.CancellationSignal;
 import android.os.Handler;
 import android.os.Looper;
 import android.util.Log;
@@ -236,8 +237,14 @@ public class LauncherAppTransitionManagerImpl extends LauncherAppTransitionManag
         return bounds;
     }
 
-    public void setRemoteAnimationProvider(RemoteAnimationProvider animationProvider) {
+    public void setRemoteAnimationProvider(final RemoteAnimationProvider animationProvider,
+            CancellationSignal cancellationSignal) {
         mRemoteAnimationProvider = animationProvider;
+        cancellationSignal.setOnCancelListener(() -> {
+            if (animationProvider == mRemoteAnimationProvider) {
+                mRemoteAnimationProvider = null;
+            }
+        });
     }
 
     /**

quickstep/src/com/android/launcher3/LauncherInitListener.java

@@ -20,6 +20,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.CancellationSignal;
 import android.os.Handler;
 
 import com.android.launcher3.states.InternalStateHandler;
@@ -48,10 +49,11 @@ public class LauncherInitListener extends InternalStateHandler implements Activi
 
             // Set a one-time animation provider. After the first call, this will get cleared.
             // TODO: Probably also check the intended target id.
+            CancellationSignal cancellationSignal = new CancellationSignal();
             appTransitionManager.setRemoteAnimationProvider((targets) -> {
 
                 // On the first call clear the reference.
-                appTransitionManager.setRemoteAnimationProvider(null);
+                cancellationSignal.cancel();
                 RemoteAnimationProvider provider = mRemoteAnimationProvider;
                 mRemoteAnimationProvider = null;
 
@@ -59,7 +61,7 @@ public class LauncherInitListener extends InternalStateHandler implements Activi
                     return provider.createWindowAnimation(targets);
                 }
                 return null;
-            });
+            }, cancellationSignal);
         }
         OverviewCallbacks.get(launcher).onInitOverviewTransition();
         return mOnInitListener.test(launcher, alreadyOnHome);

quickstep/src/com/android/launcher3/uioverrides/UiFactory.java

@@ -25,14 +25,19 @@ import static com.android.launcher3.LauncherState.NORMAL;
 import static com.android.launcher3.LauncherState.OVERVIEW;
 import static com.android.launcher3.allapps.DiscoveryBounce.HOME_BOUNCE_SEEN;
 import static com.android.launcher3.allapps.DiscoveryBounce.SHELF_BOUNCE_SEEN;
+import static com.android.systemui.shared.system.RemoteAnimationTargetCompat.MODE_CLOSING;
 
+import android.animation.AnimatorSet;
+import android.animation.ValueAnimator;
 import android.app.Activity;
 import android.content.Context;
+import android.os.CancellationSignal;
 import android.util.Base64;
 
 import com.android.launcher3.AbstractFloatingView;
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherAppTransitionManagerImpl;
 import com.android.launcher3.LauncherState;
 import com.android.launcher3.LauncherStateManager;
 import com.android.launcher3.LauncherStateManager.StateHandler;
@@ -41,6 +46,8 @@ import com.android.launcher3.anim.AnimatorPlaybackController;
 import com.android.launcher3.util.TouchController;
 import com.android.quickstep.OverviewInteractionState;
 import com.android.quickstep.RecentsModel;
+import com.android.quickstep.util.RemoteAnimationTargetSet;
+import com.android.quickstep.util.RemoteFadeOutAnimationListener;
 import com.android.quickstep.views.RecentsView;
 import com.android.systemui.shared.system.ActivityCompat;
 import com.android.systemui.shared.system.WindowManagerWrapper;
@@ -179,6 +186,23 @@ public class UiFactory {
         }
     }
 
+    public static void useFadeOutAnimationForLauncherStart(Launcher launcher,
+            CancellationSignal cancellationSignal) {
+        LauncherAppTransitionManagerImpl appTransitionManager =
+                (LauncherAppTransitionManagerImpl) launcher.getAppTransitionManager();
+        appTransitionManager.setRemoteAnimationProvider((targets) -> {
+
+            // On the first call clear the reference.
+            cancellationSignal.cancel();
+
+            ValueAnimator fadeAnimation = ValueAnimator.ofFloat(1, 0);
+            fadeAnimation.addUpdateListener(new RemoteFadeOutAnimationListener(targets));
+            AnimatorSet anim = new AnimatorSet();
+            anim.play(fadeAnimation);
+            return anim;
+        }, cancellationSignal);
+    }
+
     public static boolean dumpActivity(Activity activity, PrintWriter writer) {
         if (!Utilities.IS_DEBUG_DEVICE) {
             return false;

quickstep/src/com/android/quickstep/util/RemoteFadeOutAnimationListener.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.quickstep.util;
+
+import static com.android.quickstep.util.RemoteAnimationProvider.prepareTargetsForFirstFrame;
+import static com.android.systemui.shared.system.RemoteAnimationTargetCompat.MODE_CLOSING;
+
+import android.animation.ValueAnimator;
+import android.animation.ValueAnimator.AnimatorUpdateListener;
+
+import com.android.systemui.shared.system.RemoteAnimationTargetCompat;
+import com.android.systemui.shared.system.TransactionCompat;
+
+/**
+ * Animation listener which fades out the closing targets
+ */
+public class RemoteFadeOutAnimationListener implements AnimatorUpdateListener {
+
+    private final RemoteAnimationTargetSet mTarget;
+    private boolean mFirstFrame = true;
+
+    public RemoteFadeOutAnimationListener(RemoteAnimationTargetCompat[] targets) {
+        mTarget = new RemoteAnimationTargetSet(targets, MODE_CLOSING);
+    }
+
+    @Override
+    public void onAnimationUpdate(ValueAnimator valueAnimator) {
+        TransactionCompat t = new TransactionCompat();
+        if (mFirstFrame) {
+            prepareTargetsForFirstFrame(mTarget.unfilteredApps, t, MODE_CLOSING);
+            mFirstFrame = false;
+        }
+
+        float alpha = 1 - valueAnimator.getAnimatedFraction();
+        for (RemoteAnimationTargetCompat app : mTarget.apps) {
+            t.setAlpha(app.leash, alpha);
+        }
+        t.apply();
+    }
+}

src/com/android/launcher3/dragndrop/BaseItemDragListener.java

@@ -159,7 +159,7 @@ public abstract class BaseItemDragListener extends InternalStateHandler implemen
         postCleanup();
     }
 
-    private void postCleanup() {
+    protected void postCleanup() {
         clearReference();
         if (mLauncher != null) {
             // Remove any drag params from the launcher intent since the drag operation is complete.

src/com/android/launcher3/dragndrop/PinItemDragListener.java

@@ -22,14 +22,17 @@ import android.content.pm.LauncherApps.PinItemRequest;
 import android.graphics.Rect;
 import android.os.Build;
 import android.os.Bundle;
+import android.os.CancellationSignal;
 import android.view.DragEvent;
 import android.view.View;
 import android.widget.RemoteViews;
 
 import com.android.launcher3.DragSource;
 import com.android.launcher3.ItemInfo;
+import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherAppWidgetProviderInfo;
 import com.android.launcher3.PendingAddItemInfo;
+import com.android.launcher3.uioverrides.UiFactory;
 import com.android.launcher3.userevent.nano.LauncherLogProto;
 import com.android.launcher3.widget.PendingAddShortcutInfo;
 import com.android.launcher3.widget.PendingAddWidgetInfo;
@@ -44,11 +47,13 @@ import com.android.launcher3.widget.WidgetAddFlowHandler;
 public class PinItemDragListener extends BaseItemDragListener {
 
     private final PinItemRequest mRequest;
+    private final CancellationSignal mCancelSignal;
 
     public PinItemDragListener(PinItemRequest request, Rect previewRect,
             int previewBitmapWidth, int previewViewWidth) {
         super(previewRect, previewBitmapWidth, previewViewWidth);
         mRequest = request;
+        mCancelSignal = new CancellationSignal();
     }
 
     @Override
@@ -59,6 +64,15 @@ public class PinItemDragListener extends BaseItemDragListener {
         return super.onDragStart(event);
     }
 
+    @Override
+    public boolean init(Launcher launcher, boolean alreadyOnHome) {
+        super.init(launcher, alreadyOnHome);
+        if (!alreadyOnHome) {
+            UiFactory.useFadeOutAnimationForLauncherStart(launcher, mCancelSignal);
+        }
+        return false;
+    }
+
     @Override
     protected PendingItemDragHelper createDragHelper() {
         final PendingAddItemInfo item;
@@ -95,6 +109,12 @@ public class PinItemDragListener extends BaseItemDragListener {
         targetParent.containerType = LauncherLogProto.ContainerType.PINITEM;
     }
 
+    @Override
+    protected void postCleanup() {
+        super.postCleanup();
+        mCancelSignal.cancel();
+    }
+
     public static RemoteViews getPreview(PinItemRequest request) {
         Bundle extras = request.getExtras();
         if (extras != null &&

src_ui_overrides/com/android/launcher3/uioverrides/UiFactory.java

@@ -18,6 +18,7 @@ package com.android.launcher3.uioverrides;
 
 import android.app.Activity;
 import android.content.Context;
+import android.os.CancellationSignal;
 
 import com.android.launcher3.Launcher;
 import com.android.launcher3.LauncherStateManager.StateHandler;
@@ -51,6 +52,9 @@ public class UiFactory {
 
     public static void onTrimMemory(Launcher launcher, int level) { }
 
+    public static void useFadeOutAnimationForLauncherStart(Launcher launcher,
+            CancellationSignal cancellationSignal) { }
+
     public static boolean dumpActivity(Activity activity, PrintWriter writer) {
         return false;
     }