创建具有广播接收器和AlarmManager

我试图创建一个使用AlarmManager和广播接收器的通知的通知。（API 19，KitkKat）创建具有广播接收器和AlarmManager

我下面的步骤教程https://www.youtube.com/watch?v=gm5n_hRIR-c （开始于10:51）

但我不能让应用程序正常运行。没有投掷通知。：/ 帮助，这里是我的代码。

我的MainActivity

public class MainActivity extends AppCompatActivity { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

Button btnN = (Button) findViewById(R.id.btnalarm); 
btnN.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View v) { 
Long alertOfTime = new GregorianCalendar().getTimeInMillis() + 5 * 1000; 

    Intent alertIntent = new Intent(this, Alert.class); 

    AlarmManager aManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); 

    aManager.set(AlarmManager.RTC_WAKEUP,alertOfTime, 
      PendingIntent.getBroadcast(this,1,alertIntent,PendingIntent.FLAG_UPDATE_CURRENT)); 

     } 
    }); 
}

我班警报

public class Alert extends BroadcastReceiver { 


@Override 
public void onReceive(Context context, Intent intent) { 

      createNotification (context,"NATURE TIP","When","Alert"); 

} 

public void createNotification (Context context ,String msgg ,String msgAlert,String msgText){ 
PendingIntent pendIntentTwo = PendingIntent.getActivity(context,0, 
      new Intent(context,MainActivity.class),0); 

NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context) 
      .setSmallIcon(R.drawable.tree_24_24) 
      .setContentTitle(msgg) 
      .setTicker(msgAlert) 
      .setContentText(msgText); 

mBuilder.setContentIntent(pendIntentTwo); 

    mBuilder.setDefaults(NotificationCompat.DEFAULT_SOUND); 

    mBuilder.setAutoCancel(true); 

NotificationManager nNotifManager =(NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE);// 

    nNotifManager.notify(1,mBuilder.build()); 

} 
}

弥MainLayout

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" 
android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin" 
android:paddingRight="@dimen/activity_horizontal_margin" 
android:paddingTop="@dimen/activity_vertical_margin" 
android:paddingBottom="@dimen/activity_vertical_margin" tools:context=".MainActivity" 
android:background="@drawable/backk"> 

<Button 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:text="Alarm Notif" 
    android:id="@+id/btnalarm" 
    android:layout_centerVertical="true" 
    android:layout_centerHorizontal="true" 
    /> 

</RelativeLayout>

和我Manifiest

<?xml version="1.0" encoding="utf-8"?>

<uses-permission android:name="com.android.alarm.permission.SET_ALARMY"/> 
<application 
    android:allowBackup="true" 
    android:icon="@drawable/icon" 
    android:label="App Nature" 
    android:theme="@style/Theme.AppCompat.Light" 
    > 
<activity 
     android:name=".MainActivity" 
     android:label="App Nature" > 
     <intent-filter> 
      <action android:name="android.intent.action.MAIN" /> 

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

</application> 


</manifest>

来源

2015-11-04 Christian Escobar F

你的警报类不在清单，你需要添加'<接收机器人：名字=“ui.activity.Alert。” 机器人：启用=‘真’ 机器人：出口=‘真’> ' – EnduroDave

我认为你是对的，谢谢。但我想问一下，因为当我想到Alert类时，不是创建了.XML？出于这个原因，我无法将其包含在Manifiest。 PD（我是新至Android）@Drdavidpier –

@Drdavidpier帮助 –