Android 最简单的测试UI卡顿

就两个类:

public class BlockDetectByPrinter {
    private static final String START = ">>>>> Dispatching";
    private static final String END = "<<<<< Finished";
    public static void start(){
        Looper.getMainLooper().setMessageLogging(new Printer() {
            @Override
            public void println(String x) {
                if(x.startsWith(START)){
                    LogMonitor.getsInstance().startMonitor();
                }
                if(x.startsWith(END)){
                    LogMonitor.getsInstance().startMonitor();
                }
            }
        });
    }
}

public class LogMonitor {
    private static LogMonitor sInstance = new LogMonitor();
    private HandlerThread mLogThread = new HandlerThread("log");
    private Handler mIoHandler;
    private static  final long TIME_BLOCK = 2000L;

    private LogMonitor(){
        mLogThread.start();
        mIoHandler = new Handler(mLogThread.getLooper());
    }
    private static Runnable mLogRunnable = new Runnable() {
        @Override
        public void run() {
            StringBuilder sb = new StringBuilder();
            StackTraceElement[] stackTrace = Looper.getMainLooper().getThread().getStackTrace();
            for(StackTraceElement s:stackTrace){
                sb.append(s.toString()+"\n");
            }
            LogUtil.e("LogMonitor",sb.toString());
        }
    };
    public static LogMonitor getsInstance(){
        return sInstance;
    }
//    public boolean isMonitor(){
//        return mIoHandler.hasCallbacks(mLogRunnable);
//    }
    public void startMonitor(){
         mIoHandler.postDelayed(mLogRunnable,TIME_BLOCK);
    }
    public void removeMonitor(){
        mIoHandler.removeCallbacks(mLogRunnable);
    }

}
然后在application的onCreate方法使用
BlockDetectByPrinter.start();