Question

我正在尝试使用AlarmManager和BroadcastReceiver创建通知。（API 19，KitkKat）

我正在按照步骤教程https://www.youtube.com/watch?v=gm5n_hRIR-c （从10:51开始）

但我无法让应用程序运行。没有投掷通知。：/ 帮助，这是我的代码。

我的主要活动

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));

       }
    });
}

我的课程提醒

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());

}
}

Mi 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>

和我的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>

Answer 1

您没有在清单中注册广播。这就是它无法正常工作的原因。广播必须在使用前注册。因此，首先在清单中注册您的类警报，如果您正在使用任何操作，那么还要使用意图过滤器在清单文件中声明操作。

使用BroadcastReceiver和AlarmManager创建通知

1 个答案: