Petro123,
Да пробовал уже. Добавим сервис и ресивер.
Работает так:
MainReceiver запускает AlarmService в котором AlarmManager через 30 сек посылает вызов в NotifReceiver. NotifReceiver Делает пометку в SharedPreferences (timestamp) о том, что сообщение прибыло.
UI нужен только для того, что бы посмотреть в SharedPreferences обновился ли timestamp.
Весь код ниже.
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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.dmitres.myapplication">
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<receiver
android:name=".MainReceiver"
android:enabled="true"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>
<receiver
android:name=".NotifReceiver"
android:enabled="true"
android:exported="true" />
<service
android:name=".AlarmService"
android:enabled="true"
android:exported="true"/>
</application>
</manifest>
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public class AlarmService extends Service {
@Nullable
@Override
public IBinder onBind(Intent intent) {
return null;
}
@Override
public int onStartCommand(Intent intent, int flags, int startId) {
System.out.println("start command");
PendingIntent pi = PendingIntent.getBroadcast(getApplicationContext(), 1,
new Intent(getApplicationContext(), NotifReceiver.class), PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
am.setAndAllowWhileIdle(AlarmManager.RTC_WAKEUP,
System.currentTimeMillis() + TimeUnit.SECONDS.toMillis(30), pi);
return START_STICKY;
}
}
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public class NotifReceiver extends WakefulBroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
System.out.println("got alarm call!");
SharedPreferences p = context.getSharedPreferences("demo", Context.MODE_PRIVATE);
SharedPreferences.Editor editor = p.edit();
editor.putString("time", System.currentTimeMillis() + "");
editor.commit();
}
}
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public class MainReceiver extends WakefulBroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
System.out.println("main receiver");
context.startService(new Intent(context, AlarmService.class));
}
}
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public class MainActivity extends AppCompatActivity implements View.OnClickListener {
Button btnStart;
Button btnGet;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
btnStart = (Button) findViewById(R.id.btn_start);
btnStart.setOnClickListener(this);
btnGet = (Button) findViewById(R.id.btn_get);
btnGet.setOnClickListener(this);
}
@Override
public void onClick(View v) {
if (v == btnStart) {
System.out.println("start");
Intent intent = new Intent(
this, MainReceiver.class);
PendingIntent pi = PendingIntent.getBroadcast(this, 1, intent, PendingIntent.FLAG_UPDATE_CURRENT);
try {
pi.send();
} catch (PendingIntent.CanceledException e) {
e.printStackTrace();
}
}
if (v == btnGet) {
System.out.println("get");
SharedPreferences demo = getSharedPreferences("demo", MODE_PRIVATE);
String time = demo.getString("time", "?");
setTitle(time + " " + new Date().getTime());
}
}
}
