Android BroadcastReceiver无法在应用程序关闭/关闭时显示通知
我的任务是设置一个警报,以触发接收器在特定时间显示通知 如果应用程序处于打开状态或仅在后台运行,则代码可以完美运行 在关闭应用程序时,执行警报时仍可以触发接收器 但是,没有显示任何通知 我能做什么 报警功能:Android BroadcastReceiver无法在应用程序关闭/关闭时显示通知,android,notifications,broadcastreceiver,alarm,android-broadcastreceiver,Android,Notifications,Broadcastreceiver,Alarm,Android Broadcastreceiver,我的任务是设置一个警报,以触发接收器在特定时间显示通知 如果应用程序处于打开状态或仅在后台运行,则代码可以完美运行 在关闭应用程序时,执行警报时仍可以触发接收器 但是,没有显示任何通知 我能做什么 报警功能: public static void makeAlarm(Context context,Date date) { Log.i("Alarm", "makeAlarm"); AlarmManager alarmMgr; PendingIntent alarmInte
public static void makeAlarm(Context context,Date date) {
Log.i("Alarm", "makeAlarm");
AlarmManager alarmMgr;
PendingIntent alarmIntent;
alarmMgr = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, AlarmReceiver.class);
alarmIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
alarmMgr.set(AlarmManager.RTC_WAKEUP,
date.getTime(), alarmIntent);
}
报警接收器
public class AlarmReceiver extends BroadcastReceiver {
public AlarmReceiver() {
}
@Override
public void onReceive(Context context, Intent intent) {
Log.i("Alarm", "onReceive");
android.support.v4.app.NotificationCompat.Builder mBuilder =
new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.app_logo)
.setContentTitle("Title")
.setContentText("Message");
Intent resultIntent = new Intent(context, MainActivity.class);
TaskStackBuilder stackBuilder = TaskStackBuilder.create(context);
stackBuilder.addParentStack(MainActivity.class);
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent =
stackBuilder.getPendingIntent(
0,
PendingIntent.FLAG_UPDATE_CURRENT
);
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
Random rand = new Random();
mNotificationManager.notify(rand.nextInt(), mBuilder.build());
}
}
Manifest.xml
<receiver
android:name=".receiver.AlarmReceiver"
android:enabled="true"
android:exported="true" />
当您使用-
alarmMgr.set(AlarmManager.RTC_WAKEUP,date.getTime(), alarmIntent);
我想您的date.getTIme()正在检索当前时间。因此,当尝试执行报警时,触发时间将已经过去。更好的是,你可以做一些延迟(比如说,五秒钟)来触发你的闹钟。用电话就行了-
alarmMgr.set(AlarmManager.RTC_WAKEUP,date.getTime() + 5*1000, alarmIntent);
请运行示例代码。我想它能按你的要求工作
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setUpAlarm(10 * 1000);
}
public void setUpAlarm(long triggerTimeInMS) {
AlarmManager alarmManager = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 1, intent, 0);
alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()+triggerTimeInMS , pendingIntent);
}
}
创建receiver类-
public class AlarmReceiver extends BroadcastReceiver {
private String TAG = "AlarmLog";
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Incoming Call Received", Toast.LENGTH_LONG).show();
showNotification(context);
}
private void showNotification(Context context) {
Uri soundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.alarm)
.setContentTitle("Notification!") // title for notification
.setContentText("Alarm Received")
.setSound(soundUri)// message for notification
.setAutoCancel(true); // clear notification after click
NotificationManager mNotificationManager =
(NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(0, mBuilder.build());
}
}
别忘了注册一下听筒。在manifest.xml中放入以下代码-
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
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="com.example.shajib.alarmtest.AlarmReceiver" />
</application>
@Seasons:r您确定从后台杀死应用程序时会调用onReceive()吗?@kevz我确定onReceive()会被触发,因为我可以看到onReceive()中的logstry to Toast消息,因为通知代码看起来不错。@kevz尝试过,但仍然没有toastalright,所以onReceive()不会被调用。需要检查Y报警是否未触发。不,这不是当前时间。日期时间设置为10秒后的未来时间