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/*
* Copyright (C) 2019 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.launcher3.graphics;
import android.annotation.TargetApi;
import android.app.Activity;
import android.app.Application;
import android.app.Application.ActivityLifecycleCallbacks;
import android.content.Context;
import android.graphics.Canvas;
import android.os.Build.VERSION_CODES;
import android.os.Bundle;
import android.os.Handler;
import android.util.Log;
import android.view.View;
import android.view.View.OnAttachStateChangeListener;
import android.view.ViewTreeObserver.OnDrawListener;
import com.android.launcher3.Utilities;
import com.android.launcher3.icons.GraphicsUtils;
/**
* Utility class to check bitmap creation during draw pass.
*/
public class BitmapCreationCheck {
private static final String TAG = "BitmapCreationCheck";
public static final boolean ENABLED = false;
/**
* Starts tracking bitmap creations during {@link View#draw(Canvas)} calls
*/
public static void startTracking(Context context) {
MyTracker tracker = new MyTracker();
((Application) context.getApplicationContext()).registerActivityLifecycleCallbacks(tracker);
GraphicsUtils.sOnNewBitmapRunnable = tracker::onBitmapCreated;
}
@TargetApi(VERSION_CODES.Q)
private static class MyTracker
implements ActivityLifecycleCallbacks, OnAttachStateChangeListener {
private final ThreadLocal<Boolean> mCurrentThreadDrawing =
ThreadLocal.withInitial(() -> false);
@Override
public void onActivityCreated(Activity activity, Bundle bundle) {
activity.getWindow().getDecorView().addOnAttachStateChangeListener(this);
}
@Override
public void onActivityStarted(Activity activity) { }
@Override
public void onActivityResumed(Activity activity) { }
@Override
public void onActivityPaused(Activity activity) { }
@Override
public void onActivityStopped(Activity activity) { }
@Override
public void onActivitySaveInstanceState(Activity activity, Bundle bundle) { }
@Override
public void onActivityDestroyed(Activity activity) { }
@Override
public void onViewAttachedToWindow(View view) {
view.getViewTreeObserver().addOnDrawListener(new MyViewDrawListener(view.getHandler()));
}
@Override
public void onViewDetachedFromWindow(View view) { }
private class MyViewDrawListener implements OnDrawListener, Runnable {
private final Handler mHandler;
MyViewDrawListener(Handler handler) {
mHandler = handler;
}
@Override
public void onDraw() {
mCurrentThreadDrawing.set(true);
Utilities.postAsyncCallback(mHandler, this);
}
@Override
public void run() {
mCurrentThreadDrawing.set(false);
}
}
private void onBitmapCreated() {
if (mCurrentThreadDrawing.get()) {
Log.e(TAG, "Bitmap created during draw pass", new Exception());
}
}
}
}
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