我正在开发 10 秒后执行后台任务并检查设备是否空闲的应用程序,但它如何每 10 秒触发一次而不检查设备是否空闲。
MainActivity.java
private static final int JOB_ID = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mJobScheduler = (JobScheduler) getSystemService(this.JOB_SCHEDULER_SERVICE);
construct_job();
}
private void construct_job(){
JobInfo.Builder builder = new JobInfo.Builder(JOB_ID, new ComponentName(getPackageName(), MyJobService.class.getName()))
.setPeriodic(10000).setRequiresDeviceIdle(true);
int code = mJobScheduler.schedule(builder.build());
if( code <= 0 ) {
//If something goes wrong
Log.v("SOMETHING", "GOES WRONG");
}
}
MyJobService.java
public class MyJobService extends JobService {
@Override
public boolean onStartJob(JobParameters params) {
Log.v("OnStart", "onStartJob-h");
//Job Will Be Started Here
mJobHandler.sendMessage( Message.obtain( mJobHandler, 1, params ) );
return true;
}
@Override
public boolean onStopJob(JobParameters params) {
Log.v("JOB","STOPPED");
mJobHandler.removeMessages( 1 );
return false;
}
private Handler mJobHandler = new Handler(new Handler.Callback() {
@Override
public boolean handleMessage( Message msg ) {
Toast.makeText( getApplicationContext(),
"JobService task running", Toast.LENGTH_SHORT )
.show();
jobFinished( (JobParameters) msg.obj, false );
return true;
}
});
}
AndroidManifest.xml
<service
android:name=".MyJobService"
android:permission="android.permission.BIND_JOB_SERVICE"
android:exported="true"/>
有人知道我做错了什么吗?请帮忙?
添加 .setRequirementsEnforced(true) 可能会解决您的问题。
请参阅文档:
可以为作业设置多项要求,但是底层 {@link JobApi} 并不需要考虑所有要求。如果强制执行要求,则会在作业运行之前检查设备状态。如果至少有一项要求未得到满足,则该作业将被重新安排并且不会运行。
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