在特定时间显示通知

Question

我想在特定时间和日常活动（即早上 8 点）显示通知。我正在使用广播接收器、alarmmanager 来显示通知。但问题是，我没有收到移动设备上显示的通知。我还在清单文件中添加了唤醒锁定权限。请帮帮我谢谢

MainActivity.java

public class MainActivity extends ActionBarActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Calendar calendar = Calendar.getInstance();
    calendar.set(Calendar.HOUR_OF_DAY, 8);
    calendar.set(Calendar.MINUTE, 00);
    calendar.set(Calendar.SECOND, 0);

    Intent notificationmassage = new Intent(getApplicationContext(),NotificationClass.class);

  //This is alarm manager
  PendingIntent pi = PendingIntent.getService(this, 0 , notificationmassage, PendingIntent.FLAG_UPDATE_CURRENT);
  AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
  am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
          AlarmManager.INTERVAL_DAY, pi);

  Toast.makeText(this, "Start Alarm", Toast.LENGTH_LONG).show();

}

NotificationClass.java

public class NotificationClass extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        // TODO Auto-generated method stub

        PendingIntent contentIntent = PendingIntent.getActivity(context, 0,
                new Intent(context, MainActivity.class), 0);

        NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context)
                                                .setSmallIcon(R.drawable.ic_launcher)
                                                .setContentTitle("Text1")
                                                .setContentText("Text2 ");
        mBuilder.setContentIntent(contentIntent);
        mBuilder.setDefaults(Notification.DEFAULT_SOUND);
        mBuilder.setAutoCancel(true);
        NotificationManager mNotificationManager ;
        mNotificationManager= (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
        mNotificationManager.notify(1,mBuilder.build());

    }
}

清单：

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="21" />

<uses-permission android:name="android.permission.WAKE_LOCK"/>


<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="@string/app_name"
    android:theme="@style/AppTheme" >
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <receiver android:name=".NotificationClass">
        </receiver>
</application>

更新：- 现在的问题是每当我打开应用程序时都会出现通知。例如：闹钟设置为 8.AM，每当我在早上 8 点后打开应用程序时，通知就会出现……即使当前时间 > 早上 8 点。如何解决？

Answer 1

     public void getNotification(Context context,String Message){     
          int icon = R.drawable.appicon;
            int when =(int) System.currentTimeMillis();
            NotificationManager notificationManager = (NotificationManager)
                    context.getSystemService(Context.NOTIFICATION_SERVICE);
            Notification notification = new Notification(icon, Message, when);

            String title = context.getString(R.string.app_name);

            Intent notificationIntent = new Intent(context, MainActivity.class);

            // set intent so it does not start a new activity
             notificationIntent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP |Intent.FLAG_ACTIVITY_CLEAR_TASK);
            PendingIntent intent =PendingIntent.getActivity(context, 0, notificationIntent, 0);
            notification.setLatestEventInfo(context, title,Message, intent);
            notification.flags |= Notification.FLAG_AUTO_CANCEL;

            // Play default notification sound
            notification.defaults |= Notification.DEFAULT_SOUND;

            // Vibrate if vibrate is enabled
            notification.defaults |= Notification.DEFAULT_VIBRATE;
            notificationManager.notify(0, notification); 

    }

Answer 2

在你的activity下面替换

    PendingIntent pi = PendingIntent.getService(this, 0, notificationmassage, PendingIntent.FLAG_UPDATE_CURRENT);

和

    PendingIntent pi = PendingIntent.getBroadcast(this, 0, notificationmassage, PendingIntent.FLAG_UPDATE_CURRENT);

在特定时间显示通知

Display notifications on a particular time

notifications

android

broadcastreceiver

alarmmanager