Android中的java工作线程
你好,我正在尝试在Android中模拟一个工作线程进行测试。 该活动有一个按钮,通过工作线程调用notify(),我希望它在bucle的10次迭代后进入睡眠状态
这是我的代码和错误的堆栈跟踪。我怎样才能解决它?谢谢
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
t= new Thread(){
public void run(){
int i=0;
while(true){
if (i%10==9){
//Simulated end of data until notified again
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
Log.d("Test",""+i);
SystemClock.sleep(1000);
}
}
};
t.start();
findViewById(R.id.button1).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
t.notify();
}
});
}
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): FATAL EXCEPTION: main
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): java.lang.IllegalMonitorStateException: object not locked by thread before notify()
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at java.lang.Object.notify(Native Method)
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at com.example.memorycrash.MemoryCrashTestActivity$2.onClick(MemoryCrashTestActivity.java:51)
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at 安卓.view.View.performClick(View.java:2538)
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at 安卓.view.View$PerformClick.run(View.java:9152)
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at 安卓.os.Handler.handleCallback(Handler.java:587)
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at 安卓.os.Handler.dispatchMessage(Handler.java:92)
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at 安卓.os.Looper.loop(Looper.java:130)
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at 安卓.app.ActivityThread.main(ActivityThread.java:3687)
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at java.lang.reflect.Method.invokeNative(Native Method)
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at java.lang.reflect.Method.invoke(Method.java:507)
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at com.安卓.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:842)
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at com.安卓.internal.os.ZygoteInit.main(ZygoteInit.java:600)
08-06 05:39:45.320: ERROR/AndroidRuntime(4480): at dalvik.system.NativeStart.main(Native Method)
# 1 楼答案
这就是你的解决方案。 答案已经在StackOverflow上了
要在对象上调用wait()、notify()或notifyAll(),必须首先拥有要调用该方法的对象的监视器,因此在runnable中,您需要这样做:
要通知runnable,还必须有监视器