用于JobScheduler的Android-setPeriodic无法正常工作 [英] Android- setPeriodic for JobScheduler won't work
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问题描述
我编写了一个使用本地SqliteDatabase创建和提醒任务的应用程序. 我编写了一个jobScheduler服务，以检查设备时间和日期以及数据库中的任务，如果匹配则显示推送通知. 我还想要的是在后台运行的服务，每5秒检查一次数据. 但是当我写
I've wrote an app for creating and reminding task which uses local SqliteDatabase. I wrote a jobScheduler service to check the device time and date with tasks on the database and if matches shows a push notification. What I want also is service to run in background and check the data every 5 seconds . but when I write
builder.setPeriodic(5000); builder.setPersisted(true);
builder.setPeriodic(5000); builder.setPersisted(true);
该服务停止检查数据.
这是我的代码
MainActivity
public class MainActivity extends AppCompatActivity {
ImageButton plusImageBtn;
DatabaseHelper databaseHelper;
BottomNavigationView navigation;
Toolbar toolbar;
private ComponentName mServiceComponent;
private int jobId=0;
private static final String TAG = MainActivity.class.getSimpleName();
public static final String WORK_DURATION_KEY =
BuildConfig.APPLICATION_ID + ".WORK_DURATION_KEY";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
navigation = (BottomNavigationView) findViewById(R.id.navigation);
plusImageBtn = (ImageButton) findViewById(R.id.plusImagBtn);
toolbar= (Toolbar) findViewById(R.id.toolbar_main);
setSupportActionBar(toolbar);
mServiceComponent = new ComponentName(this, JobSchedulerService.class);
databaseHelper= new DatabaseHelper(this);
navigation.setOnNavigationItemSelectedListener
(new BottomNavigationView.OnNavigationItemSelectedListener() {
@Override
public boolean onNavigationItemSelected(@NonNull MenuItem item) {
Fragment selectedFragment = null;
switch (item.getItemId()) {
case R.id.navigation_calendar:
selectedFragment = new CalendarFragment();
break;
case R.id.navigation_home:
selectedFragment = new ViewListContents();
break;
}
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame_layout, selectedFragment);
transaction.commit();
return true;
}
});
FragmentTransaction transaction =
getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.frame_layout,new ViewListContents());
transaction.commit();
scheduleJob();
}
@Override
protected void onStart() {
super.onStart();
// Start service and provide it a way to communicate with this class.
Intent startServiceIntent = new Intent(this, JobSchedulerService.class);
startService(startServiceIntent);
}
@Override
protected void onStop() {
stopService(new Intent(this,JobSchedulerService.class));
super.onStop();
}
public void scheduleJob() {
JobInfo.Builder builder = new JobInfo.Builder(jobId++, mServiceComponent);
// builder.setPeriodic(5000);
// builder.setPersisted(true);
builder.setMinimumLatency(1000);
builder.setOverrideDeadline(1000);
// Extras, work duration.
PersistableBundle extras = new PersistableBundle();
extras.putLong("",5000);
builder.setExtras(extras);
// Schedule job
Log.d(TAG, "Scheduling job");
JobScheduler tm = (JobScheduler) getSystemService(Context.JOB_SCHEDULER_SERVICE);
tm.schedule(builder.build());
Toast.makeText(this, "Scheduling job ", Toast.LENGTH_SHORT).show();
}}
JobSchedulerService
public class JobSchedulerService extends JobService {
int id;
String stringId;
String date;
String taskDate,taskTitle,taskTime,sepYear,sepMonth,
sepDay,convert,DeviceDate;
Cursor taskDateCursor;
DatabaseHelper databaseHelper;
Roozh roozh;
String[] seperatedString;
int iYear,iMonth, iDay;
SimpleDateFormat dateFormat, timeFormat;
private static final String TAG = JobSchedulerService.class.getSimpleName();
@Override
public void onCreate() {
super.onCreate();
Log.i(TAG, "Service created");
}
@Override
public void onDestroy() {
super.onDestroy();
Log.i(TAG, "Service destroyed"); }
@Override
public boolean onStartJob(final JobParameters params) {
stringId = String.valueOf(params.getJobId());
id = params.getJobId();
final long duration = params.getExtras().getLong(WORK_DURATION_KEY);
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
@Override
public void run() {
databaseHelper= new DatabaseHelper(getApplicationContext());
taskDateCursor=databaseHelper.getDateForNotification();
if (taskDateCursor.moveToFirst()){
do {
taskTitle=taskDateCursor.getString(taskDateCursor.getColumnIndex(DatabaseHelper.COL2));
taskDate=taskDateCursor.getString(taskDateCursor.getColumnIndex(DatabaseHelper.COL3));
taskTime=taskDateCursor.getString(taskDateCursor.getColumnIndex(DatabaseHelper.COL4));
roozh= new Roozh();
seperatedString=taskDate.split("/");
sepYear= seperatedString[0];
sepMonth= seperatedString[1];
sepDay= seperatedString[2].trim();
iYear= Integer.parseInt(sepYear);
iMonth= Integer.parseInt(sepMonth);
iDay= Integer.parseInt(sepDay);
roozh.PersianToGregorian(iYear,iMonth,iDay);
convert= roozh.toString();
dateFormat= new SimpleDateFormat(
"yyyy-MM-dd", Locale.getDefault());
DeviceDate= dateFormat.format(new Date());
timeFormat=new SimpleDateFormat("HH:m",Locale.getDefault());
String deviceTime=timeFormat.format(new Date());
RemoteViews remoteViews= new RemoteViews(getPackageName(),R.layout.notification);
remoteViews.setImageViewResource(R.id.notif_image, R.mipmap.ic_launcher);
remoteViews.setTextViewText(R.id.title,taskTitle);
remoteViews.setTextViewText(R.id.text,taskTime);
if (DeviceDate.equals(convert) && deviceTime.equals(taskTime) ){
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(getApplicationContext())
.setSmallIcon(R.drawable.drawable_circle)
.setContent(remoteViews)
.setPriority(NotificationCompat.PRIORITY_DEFAULT)
.setColor(ContextCompat.getColor(getApplication(), R.color.primaryDarkColor))
.setShowWhen(true)
.setAutoCancel(true);
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(getApplicationContext());
notificationManager.notify(0, mBuilder.build());
}
Log.i(TAG, "data " + DeviceDate+ "task" + convert+ " " + "dd" + " "+ taskTime + "dt" + "" + deviceTime);
}while (taskDateCursor.moveToNext());
} }
}, duration);
Log.i(TAG, "on start job: " + params.getJobId());
return true; }
@Override
public boolean onStopJob(JobParameters params) {
Log.i(TAG, "on stop job: " + params.getJobId());
return true; }
推荐答案
我认为您的问题是您希望执行工作的频率.在标准AOSP中，最短工作时间为15分钟.因此，它可能不是适合您的API.警报管理器可能是您想要的，但是每5秒设置一个警报非常昂贵. Google还在每个版本中越来越多地限制后台服务.只是要记住一点.
I think your problem is the frequency you would like to execute your job. The minimum period for a job is 15 minutes in the standard AOSP. So it probably isn't the right API for you. Alarm Manager would probably be what you want, but setting an alarm for every 5 seconds is expensive. Google has also been restricting background services more and more with each release. Just something to keep in mind.
请参阅: JobScheduler不重复工作
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