update:2021.03.19

fix:重新提交
add:

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

@@ -1,71 +0,0 @@
-/*
- * 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.uioverrides;
-
-import android.animation.Animator;
-import android.animation.AnimatorListenerAdapter;
-import android.animation.ValueAnimator;
-
-import com.android.uiuios.Launcher;
-import com.android.uiuios.LauncherState;
-import com.android.uiuios.LauncherStateManager;
-import com.android.uiuios.anim.AnimatorSetBuilder;
-import com.android.quickstep.OverviewInteractionState;
-
-public class BackButtonAlphaHandler implements LauncherStateManager.StateHandler {
-
-    private static final String TAG = "BackButtonAlphaHandler";
-
-    private final Launcher mLauncher;
-    private final OverviewInteractionState mOverviewInteractionState;
-
-    public BackButtonAlphaHandler(Launcher launcher) {
-        mLauncher = launcher;
-        mOverviewInteractionState = OverviewInteractionState.INSTANCE.get(mLauncher);
-    }
-
-    @Override
-    public void setState(LauncherState state) {
-        UiFactory.onLauncherStateOrFocusChanged(mLauncher);
-    }
-
-    @Override
-    public void setStateWithAnimation(LauncherState toState,
-            AnimatorSetBuilder builder, LauncherStateManager.AnimationConfig config) {
-        if (!config.playNonAtomicComponent()) {
-            return;
-        }
-        float fromAlpha = mOverviewInteractionState.getBackButtonAlpha();
-        float toAlpha = toState.hideBackButton ? 0 : 1;
-        if (Float.compare(fromAlpha, toAlpha) != 0) {
-            ValueAnimator anim = ValueAnimator.ofFloat(fromAlpha, toAlpha);
-            anim.setDuration(config.duration);
-            anim.addUpdateListener(valueAnimator -> {
-                final float alpha = (float) valueAnimator.getAnimatedValue();
-                mOverviewInteractionState.setBackButtonAlpha(alpha, false);
-            });
-            anim.addListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(Animator animation) {
-                    // Reapply the final alpha in case some state (e.g. window focus) changed.
-                    UiFactory.onLauncherStateOrFocusChanged(mLauncher);
-                }
-            });
-            builder.play(anim);
-        }
-    }
-}