Question

我在Nexus 5X（Android 8.0）上使用Google运行以下JobIntentService示例

public class SimpleJobIntentService extends JobIntentService {
   /**
    * Unique job ID for this service.
    */
   static final int JOB_ID = 1000;

  /**
   * Convenience method for enqueuing work in to this service.
   */
  static void enqueueWork(Context context, Intent work) {
    enqueueWork(context, SimpleJobIntentService.class, JOB_ID, work);
  }

  @Override
  protected void onHandleWork(Intent intent) {
    // We have received work to do.  The system or framework is already
    // holding a wake lock for us at this point, so we can just go.
    Log.i("SimpleJobIntentService", "Executing work: " + intent);
    String label = intent.getStringExtra("label");
    if (label == null) {
        label = intent.toString();
    }
    toast("Executing: " + label);
    for (int i = 0; i < 5; i++) {
        Log.i("SimpleJobIntentService", "Running service " + (i + 1)
                + "/5 @ " + SystemClock.elapsedRealtime());
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
        }
    }
    Log.i("SimpleJobIntentService", "Completed service @ " + SystemClock.elapsedRealtime());
 }

 @Override
 public void onDestroy() {
    super.onDestroy();
    Log.i(getClass().toString(), "JobIntentService destroyed");
 }
}

该服务已添加到AndroidManifest.xml，如下所示。

<service android:name=".SimpleJobIntentService "
             android:exported="true"
             android:permission="android.permission.BIND_JOB_SERVICE"/>

在正常情况下，服务按预期运行，在退出之前循环循环。

现在我运行了以下adb命令来测试Doze模式

adb shell dumpsys deviceidle force-idle

修改以下是服务启动时然后强制进入打盹模式的日志

12-14 12:11:18.587 24357-24396/<package-name> I/SimpleJobIntentService: after sleep
    12-14 12:11:18.588 24357-24396/<package-name> I/SimpleJobIntentService: Running service 2/5 @ 510158341
    12-14 12:11:18.588 24357-24396/<package-name> I/SimpleJobIntentService: before sleep
    12-14 12:11:19.629 24357-24396/<package-name> I/SimpleJobIntentService: after sleep
    12-14 12:11:19.629 24357-24396/<package-name> I/SimpleJobIntentService: Running service 3/5 @ 510159383
    12-14 12:11:19.629 24357-24396/<package-name> I/SimpleJobIntentService: before sleep
    12-14 12:11:20.593 24357-24357/<package-name> I/SimpleJobIntentService: JobIntentService destroyed
    12-14 12:11:20.670 24357-24396/<package-name> I/SimpleJobIntentService: after sleep
    12-14 12:11:20.670 24357-24396/<package-name> I/SimpleJobIntentService: Running service 4/5 @ 510160424
    12-14 12:11:20.670 24357-24396/<package-name> I/SimpleJobIntentService: before sleep
    12-14 12:11:21.708 24357-24396/<package-name> I/SimpleJobIntentService: after sleep
    12-14 12:11:21.709 24357-24396/<package-name> I/SimpleJobIntentService: Running service 5/5 @ 510161463
    12-14 12:11:21.709 24357-24396/<package-name> I/SimpleJobIntentService: before sleep
    12-14 12:11:22.750 24357-24396/<package-name> I/SimpleJobIntentService: after sleep
    12-14 12:11:22.750 24357-24396/<package-name> I/SimpleJobIntentService: Completed service @ 510162504

它清楚地调用onDestroy()，但稍后会继续循环循环。我知道系统会定期退出打盹模式，让应用程序执行延迟活动。在打盹模式下完成服务后，将运行以下adb命令以退出打盹模式

adb shell dumpsys deviceidle unforce

修改以下是执行上述adb命令时的日志

12-14 12:15:25.244 24357-24481/<package-name> I/class SimpleJobIntentService : work started
    12-14 12:15:25.244 24357-24481/<package-name> I/SimpleJobIntentService: Running service 1/5 @ 510404998
    12-14 12:15:25.244 24357-24481/<package-name> I/SimpleJobIntentService: before sleep
    12-14 12:15:26.285 24357-24481/<package-name> I/SimpleJobIntentService: after sleep
    12-14 12:15:26.285 24357-24481/<package-name> I/SimpleJobIntentService: Running service 2/5 @ 510406039
    12-14 12:15:26.285 24357-24481/<package-name> I/SimpleJobIntentService: before sleep
    12-14 12:15:27.326 24357-24481/<package-name> I/SimpleJobIntentService: after sleep
    12-14 12:15:27.327 24357-24481/<package-name> I/SimpleJobIntentService: Running service 3/5 @ 510407080
    12-14 12:15:27.327 24357-24481/<package-name> I/SimpleJobIntentService: before sleep
    12-14 12:15:28.367 24357-24481/<package-name> I/SimpleJobIntentService: after sleep
    12-14 12:15:28.368 24357-24481/<package-name> I/SimpleJobIntentService: Running service 4/5 @ 510408121
    12-14 12:15:28.368 24357-24481/<package-name> I/SimpleJobIntentService: before sleep
    12-14 12:15:29.408 24357-24481/<package-name> I/SimpleJobIntentService: after sleep
    12-14 12:15:29.409 24357-24481/<package-name> I/SimpleJobIntentService: Running service 5/5 @ 510409163
    12-14 12:15:29.409 24357-24481/<package-name> I/SimpleJobIntentService: before sleep
    12-14 12:15:30.446 24357-24481/<package-name> I/SimpleJobIntentService: after sleep
    12-14 12:15:30.446 24357-24481/<package-name> I/SimpleJobIntentService: Completed service @ 510410200
    12-14 12:15:30.457 24357-24357/<package-name> I/SimpleJobIntentService: JobIntentService destroyed

JobIntentService虽然早先完成，但会再次执行。这是可接受的行为吗？或者我错过了什么？帮助我理解JobIntentService的工作

退出打盹模式后，JobIntentService再次运行

0 个答案: