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我已经为某个进程创建了一个线程，并且我正在使用 Progress Dialog 同时运行这个线程。进程完成后，进度对话框将关闭。直到这没有问题，但是当用户按下手机的后退按钮两次时，活动将被破坏，我的进程应该停止。所以我已经停止了 onDestroy() 中的线程。但是应用程序在我的代码中崩溃mt.stop()并且错误日志如下所示。请给我任何解决方案，如果可能的话，我想要这背后的原因。使用标志，进程将仅在每次迭代开始时检查是否停止。我想显着地停止进程。

代码

Button b;
ProgressDialog pd = null;
MyThread mt;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    b = (Button) findViewById(R.id.btn_start);
    b.setOnClickListener(this);
}

public void onClick(View v) {
    pd = ProgressDialog.show(this, "one", "two", true, true);
    mt = new MyThread();
    mt.start();
}

class MyThread extends Thread {
    @Override
    public void run() {
        // assume this loop is my process.
        for (int i = 0; i < 10; i++) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            Log.v("log_tag", "" + i);
        }
        Log.v("log_tag", "process COmplited");
        pd.dismiss();
        super.run();
    }
}

@Override
protected void onDestroy() {
    Log.v("log_tag", "OnDestroy");
    pd.dismiss();
    mt.stop();
    super.onDestroy();
}

日志猫错误；

11-09 17:26:45.313: E/global(594): Deprecated Thread methods are not supported.
11-09 17:26:45.313: E/global(594): java.lang.UnsupportedOperationException
11-09 17:26:45.313: E/global(594):  at java.lang.VMThread.stop(VMThread.java:85)
11-09 17:26:45.313: E/global(594):  at java.lang.Thread.stop(Thread.java:1379)
11-09 17:26:45.313: E/global(594):  at java.lang.Thread.stop(Thread.java:1344)
11-09 17:26:45.313: E/global(594):  at com.example.threaddemo.MainActivity.onDestroy(MainActivity.java:53)
11-09 17:26:45.313: E/global(594):  at android.app.ActivityThread.performDestroyActivity(ActivityThread.java:3642)
11-09 17:26:45.313: E/global(594):  at android.app.ActivityThread.handleDestroyActivity(ActivityThread.java:3673)
11-09 17:26:45.313: E/global(594):  at android.app.ActivityThread.access$2900(ActivityThread.java:125)
11-09 17:26:45.313: E/global(594):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2066)
11-09 17:26:45.313: E/global(594):  at android.os.Handler.dispatchMessage(Handler.java:99)
11-09 17:26:45.313: E/global(594):  at android.os.Looper.loop(Looper.java:123)
11-09 17:26:45.313: E/global(594):  at android.app.ActivityThread.main(ActivityThread.java:4627)
11-09 17:26:45.313: E/global(594):  at java.lang.reflect.Method.invokeNative(Native Method)
11-09 17:26:45.313: E/global(594):  at java.lang.reflect.Method.invoke(Method.java:521)
11-09 17:26:45.313: E/global(594):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
11-09 17:26:45.313: E/global(594):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
11-09 17:26:45.313: E/global(594):  at dalvik.system.NativeStart.main(Native Method)
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1 回答 1

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请参考我的解决方案： android kill specific thread on action bar event

使用 TimerTask 代替线程的解决方案可以更好、更优化地为您服务。

即使取消也会起作用:)

PS：它也有信息为什么stop不适合你。

于 2012-11-10T05:10:14.320 回答