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java - Thread.Interrupt() 在 Android 中没有按预期工作？

问题描述

这是我的代码：

调用中断确实会停止线程，但只是一瞬间，线程立即继续，但为什么呢？我目前对这个问题的解决方案是使用 ArrayList 来管理线程，并遍历 ArrayList 来停止线程。虽然这行得通，但肯定不好。任何人都可以帮助我吗？

private Thread thread;
private static final String TAG = "StoragePresenter";

public void refreshVolumes(boolean isRunning) {
    if (isRunning) {
        Handler handler = new Handler();
        Runnable runnable = () -> {
            while (!thread.isInterrupted()) {
                Log.d(TAG, "refreshVolumes: thread.isInterrupted? above while " + thread.isInterrupted());
                try {
                    Thread.sleep(refreshDelay);
                    Log.d(TAG, "refreshVolumes: in TRY ---> " + Thread.currentThread().getName()); //Thread -> 9
                } catch (InterruptedException ignored) {
                }
                Log.d(TAG, "refreshVolumes: in runnable WHILE ---> " + Thread.currentThread().getName());
                handler.post(this::getVolumes);
            }
        };
        thread = new Thread(runnable);
        Log.d(TAG, "refreshVolumes: start thread's name -> " + thread.getName());
        thread.start(); // Thread -> 9 started
    } else {
        Log.d(TAG, "refreshVolumes: interrupt thread's name -> " + thread.getName());
        thread.interrupt(); // Thread -> 9 interrupted
        Log.d(TAG, "refreshVolumes: thread.isInterrupted? " + thread.isInterrupted());
        Log.d(TAG, "refreshVolumes: thread.isInterrupted? 2x " + thread.isInterrupted());
    }
}

日志输出：

        ////////////////////////////////////
        called refreshVolumes(true)
        ////////////////////////////////////
        08-09 17:41:29.687 924-1811/? I/ActivityManager: START u0 {cmp=com.xxxxxxxxx.android.dev/com.xxxxxxxxx.app.ui.main.settings.storage.StorageActivity} from uid 10293
        08-09 17:41:29.767 26451-26451/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: start thread's name -> Thread-9
        08-09 17:41:29.768 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: thread.isInterrupted? above while false
        08-09 17:41:29.927 924-995/? I/ActivityManager: Displayed com.xxxxxxxxx.android.dev/com.xxxxxxxxx.app.ui.main.settings.storage.StorageActivity: +210ms
        08-09 17:41:33.269 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in TRY ---> Thread-9
            refreshVolumes: in runnable WHILE ---> Thread-9
        08-09 17:41:33.271 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: thread.isInterrupted? above while false
        08-09 17:41:36.772 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in TRY ---> Thread-9
            refreshVolumes: in runnable WHILE ---> Thread-9
        08-09 17:41:36.773 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: thread.isInterrupted? above while false
        08-09 17:41:40.274 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in TRY ---> Thread-9
            refreshVolumes: in runnable WHILE ---> Thread-9
        08-09 17:41:40.275 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: thread.isInterrupted? above while false
        08-09 17:41:43.776 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in TRY ---> Thread-9
            refreshVolumes: in runnable WHILE ---> Thread-9
        08-09 17:41:43.777 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: thread.isInterrupted? above while false
        08-09 17:41:47.278 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in TRY ---> Thread-9
        08-09 17:41:47.279 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in runnable WHILE ---> Thread-9
        08-09 17:41:47.280 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: thread.isInterrupted? above while false
        08-09 17:41:50.780 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in TRY ---> Thread-9
            refreshVolumes: in runnable WHILE ---> Thread-9
            refreshVolumes: thread.isInterrupted? above while false
        ////////////////////////////////////
        called refreshVolumes(false)
        ////////////////////////////////////
        08-09 17:41:50.861 26451-26451/com.xxxxxxxxx.android.dev
D/StoragePresenter: refreshVolumes: interrupt thread's name -> Thread-9
        08-09 17:41:50.862 26451-26451/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: thread.isInterrupted? true
            refreshVolumes: thread.isInterrupted? 2x false
        08-09 17:41:50.862 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in runnable WHILE ---> Thread-9
            refreshVolumes: thread.isInterrupted? above while false
        08-09 17:41:54.362 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in TRY ---> Thread-9
        08-09 17:41:54.363 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in runnable WHILE ---> Thread-9
        08-09 17:41:54.376 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: thread.isInterrupted? above while false
        08-09 17:41:57.878 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in TRY ---> Thread-9
            refreshVolumes: in runnable WHILE ---> Thread-9
        08-09 17:41:57.879 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: thread.isInterrupted? above while false
        08-09 17:42:01.380 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in TRY ---> Thread-9
            refreshVolumes: in runnable WHILE ---> Thread-9
        08-09 17:42:01.381 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: thread.isInterrupted? above while false
        08-09 17:42:04.882 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in TRY ---> Thread-9
            refreshVolumes: in runnable WHILE ---> Thread-9
        08-09 17:42:04.883 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: thread.isInterrupted? above while false
        08-09 17:42:08.384 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in TRY ---> Thread-9
        08-09 17:42:08.385 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in runnable WHILE ---> Thread-9
            refreshVolumes: thread.isInterrupted? above while false
        08-09 17:42:11.886 26451-26676/com.xxxxxxxxx.android.dev D/StoragePresenter: refreshVolumes: in TRY ---> Thread-9

标签： javaandroidmultithreading

解决方案

Thread.sleep抛出时InterruptedException（由于在睡眠时被中断），它清除中断标志。如果您希望它以这种方式工作，您实际上应该处理InterruptedException并使用该catch块来跳出循环。

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