仅在特定设备上的SurfaceView中的ANR - 唯一的解决方法是睡眠时间短

在我的Android应用程序中，我使用a来绘制东西。它在数千台设备上工作正常 - 除了现在用户开始在以下设备上报告ANR：SurfaceView

• LG G4
  • 安卓 5.1
  • 3 GB 内存
  • 5.5 英寸显示屏
  • 2560 x 1440 px 分辨率
• 索尼Xperia Z4
  • 安卓5.0
  • 3 GB 内存
  • 5，2“ 显示屏
  • 1920 x 1080 px 分辨率
• 华为昇腾伴侣7
  • 安卓 5.1
  • 3 GB 内存
  • 6.0 英寸显示屏
  • 1920 x 1080 px 分辨率
• 宏达电 M9
  • 安卓 5.1
  • 3 GB 内存
  • 5.0“ 显示屏
  • 1920 x 1080 px 分辨率

所以我买了一台LG G4，并且确实能够验证这个问题。它与 .SurfaceView

现在猜猜经过数小时的调试后，是什么解决了问题？它正在取代...

mSurfaceHolder.unlockCanvasAndPost(c);

...跟。。。

mSurfaceHolder.unlockCanvasAndPost(c);
System.out.println("123"); // THIS IS THE FIX

这怎么可能？

以下代码是我的渲染线程，除上述设备外，它一直工作正常：

import android.graphics.Canvas;
import android.view.SurfaceHolder;

public class MyThread extends Thread {

    private final SurfaceHolder mSurfaceHolder;
    private final MySurfaceView mSurface;
    private volatile boolean mRunning = false;

    public MyThread(SurfaceHolder surfaceHolder, MySurfaceView surface) {
        mSurfaceHolder = surfaceHolder;
        mSurface = surface;
    }

    public void setRunning(boolean run) {
        mRunning = run;
    }

    @Override
    public void run() {
        Canvas c;
        while (mRunning) {
            c = null;
            try {
                c = mSurfaceHolder.lockCanvas();
                if (c != null) {
                    mSurface.doDraw(c);
                }
            }
            finally { // when exception is thrown above we may not leave the surface in an inconsistent state
                if (c != null) {
                    try {
                        mSurfaceHolder.unlockCanvasAndPost(c);
                    }
                    catch (Exception e) { }
                }
            }
        }
    }

}

该代码部分来自Android SDK中的示例，更具体地说。LunarLanderLunarView.java

更新代码以匹配 Android 6.0（API 级别 23）中的改进示例，将产生以下结果：

import android.graphics.Canvas;
import android.view.SurfaceHolder;

public class MyThread extends Thread {

    /** Handle to the surface manager object that we interact with */
    private final SurfaceHolder mSurfaceHolder;
    private final MySurfaceView mSurface;
    /** Used to signal the thread whether it should be running or not */
    private boolean mRunning = false;
    /** Lock for `mRunning` member */
    private final Object mRunningLock = new Object();

    public MyThread(SurfaceHolder surfaceHolder, MySurfaceView surface) {
        mSurfaceHolder = surfaceHolder;
        mSurface = surface;
    }

    /**
     * Used to signal the thread whether it should be running or not
     *
     * @param running `true` to run or `false` to shut down
     */
    public void setRunning(final boolean running) {
        // do not allow modification while any canvas operations are still going on (see `run()`)
        synchronized (mRunningLock) {
            mRunning = running;
        }
    }

    @Override
    public void run() {
        while (mRunning) {
            Canvas c = null;

            try {
                c = mSurfaceHolder.lockCanvas(null);
                synchronized (mSurfaceHolder) {
                    // do not allow flag to be set to `false` until all canvas draw operations are complete
                    synchronized (mRunningLock) {
                        // stop canvas operations if flag has been set to `false`
                        if (mRunning) {
                            mSurface.doDraw(c);
                        }
                    }
                }
            }
            // if an exception is thrown during the above, don't leave the view in an inconsistent state
            finally {
                if (c != null) {
                    mSurfaceHolder.unlockCanvasAndPost(c);
                }
            }
        }
    }

}

但是，此类仍然不适用于上述设备。我出现黑屏，应用程序停止响应。

唯一（我发现的）解决问题的是添加调用。在循环结束时添加较短的睡眠时间，结果结果显示相同的结果：System.out.println("123")

try {
    Thread.sleep(10);
}
catch (InterruptedException e) { }

但这些都不是真正的解决方案，不是吗？这不是很奇怪吗？

（根据我对代码所做的更改，我还能够在错误日志中看到异常。有许多开发人员遇到同样的问题，但不幸的是，没有人为我（特定于设备）的情况提供解决方案。

你能帮忙吗？