update:2021.03.19

fix:重新提交
add:

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

@@ -0,0 +1,141 @@
+/*
+ * 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.uiuios;
+
+import static com.android.uiuios.Utilities.SINGLE_FRAME_MS;
+import static com.android.uiuios.Utilities.postAsyncCallback;
+import static com.android.systemui.shared.recents.utilities.Utilities
+        .postAtFrontOfQueueAsynchronously;
+
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.AnimatorSet;
+import android.annotation.TargetApi;
+import android.os.Build;
+import android.os.Handler;
+
+import com.android.systemui.shared.system.RemoteAnimationRunnerCompat;
+import com.android.systemui.shared.system.RemoteAnimationTargetCompat;
+
+import androidx.annotation.BinderThread;
+import androidx.annotation.UiThread;
+
+@TargetApi(Build.VERSION_CODES.P)
+public abstract class LauncherAnimationRunner implements RemoteAnimationRunnerCompat {
+
+    private final Handler mHandler;
+    private final boolean mStartAtFrontOfQueue;
+    private AnimationResult mAnimationResult;
+
+    /**
+     * @param startAtFrontOfQueue If true, the animation start will be posted at the front of the
+     *                            queue to minimize latency.
+     */
+    public LauncherAnimationRunner(Handler handler, boolean startAtFrontOfQueue) {
+        mHandler = handler;
+        mStartAtFrontOfQueue = startAtFrontOfQueue;
+    }
+
+    @BinderThread
+    @Override
+    public void onAnimationStart(RemoteAnimationTargetCompat[] targetCompats, Runnable runnable) {
+        Runnable r = () -> {
+            finishExistingAnimation();
+            mAnimationResult = new AnimationResult(runnable);
+            onCreateAnimation(targetCompats, mAnimationResult);
+        };
+        if (mStartAtFrontOfQueue) {
+            postAtFrontOfQueueAsynchronously(mHandler, r);
+        } else {
+            postAsyncCallback(mHandler, r);
+        }
+    }
+
+    /**
+     * Called on the UI thread when the animation targets are received. The implementation must
+     * call {@link AnimationResult#setAnimation(AnimatorSet)} with the target animation to be run.
+     */
+    @UiThread
+    public abstract void onCreateAnimation(
+            RemoteAnimationTargetCompat[] targetCompats, AnimationResult result);
+
+    @UiThread
+    private void finishExistingAnimation() {
+        if (mAnimationResult != null) {
+            mAnimationResult.finish();
+            mAnimationResult = null;
+        }
+    }
+
+    /**
+     * Called by the system
+     */
+    @BinderThread
+    @Override
+    public void onAnimationCancelled() {
+        postAsyncCallback(mHandler, this::finishExistingAnimation);
+    }
+
+    public static final class AnimationResult {
+
+        private final Runnable mFinishRunnable;
+
+        private AnimatorSet mAnimator;
+        private boolean mFinished = false;
+        private boolean mInitialized = false;
+
+        private AnimationResult(Runnable finishRunnable) {
+            mFinishRunnable = finishRunnable;
+        }
+
+        @UiThread
+        private void finish() {
+            if (!mFinished) {
+                mFinishRunnable.run();
+                mFinished = true;
+            }
+        }
+
+        @UiThread
+        public void setAnimation(AnimatorSet animation) {
+            if (mInitialized) {
+                throw new IllegalStateException("Animation already initialized");
+            }
+            mInitialized = true;
+            mAnimator = animation;
+            if (mAnimator == null) {
+                finish();
+            } else if (mFinished) {
+                // Animation callback was already finished, skip the animation.
+                mAnimator.start();
+                mAnimator.end();
+            } else {
+                // Start the animation
+                mAnimator.addListener(new AnimatorListenerAdapter() {
+                    @Override
+                    public void onAnimationEnd(Animator animation) {
+                        finish();
+                    }
+                });
+                mAnimator.start();
+
+                // Because t=0 has the app icon in its original spot, we can skip the
+                // first frame and have the same movement one frame earlier.
+                mAnimator.setCurrentPlayTime(SINGLE_FRAME_MS);
+            }
+        }
+    }
+}