java - OutOfMemoryError 通过使用 java.util.Timer

Question

Timer mTimer;

void scheduleSyncIn(int aSeconds){
    if (mTimer != null) {
        mTimer.cancel();
        mTimer = null;
    }
    mTimer = new Timer();
    TimerTask task = new TimerTask() {

        @Override
        public void run() {
           handleTimeout();
         }
    };

    if (request) {
        mTimer.schedule(task, aSeconds * 1000);
    }
}

定时器任务调用的方法

void handleTimeout(){
    Handler mainHandler = new Handler(mContext.getMainLooper());
    Runnable runnable = new Runnable(){

            @Override
            public void run() {
                sync(); //call the sync
            }
        };
        mainHandler.post(runnable);
    }

由此我从 Play 商店获得了以下报告

java.lang.OutOfMemoryError: pthread_create (stack size 16384 bytes) failed: Try again
at java.lang.VMThread.create(Native Method)
at java.lang.Thread.start(Thread.java:1029)
at java.util.Timer$TimerImpl.<init>(Timer.java:192)
at java.util.Timer.<init>(Timer.java:367)
at java.util.Timer.<init>(Timer.java:387)
at java.util.Timer.<init>(Timer.java:394)
at com.example.Manager.scheduleSyncIn(Manager.java:66)
at com.example.Manager.scheduleSync(Manager.java:56)
at com.example.Manager.RequestDone(Manager.java:180)
com.example.Manager.Remote$GetMetaData.onPostExecute(Remote.java:338)
at com.example.Manager.Remote$GetMetaData.onPostExecute(Remote.java:1)
at android.os.AsyncTask.finish(AsyncTask.java:632)
at android.os.AsyncTask.access$600(AsyncTask.java:177)
at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:645)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5137)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:795)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:611)
at dalvik.system.NativeStart.main(Native Method)

现在我不知道为什么在每次初始化前取消计时器并为 GC 释放计时器时出现此错误。谢谢你的帮助。

Answer 1

我建议在 android 中使用 Handler 而不是 Timer，因为它会导致 memory leaks在您的应用程序中。

示例:

  Handler mHandler;
  Runnable mRunnable;
  void scheduleSyncIn(int aSeconds){
      mHandler = new Handler();
      mRunnable = new Runnable() {

            @Override
            public void run() {
              mHandler.postDelayed(mRunnable, aSeconds);
            }
          };
      mHandler.postDelayed(mRunnable, aSeconds);

  }