广播接收器，通知 Android

Question

我有一个使用广播接收器的应用程序。

我想向用户发送通知，但有时它有效，有时无效。 以下代码在我的实现之上。

MANIFEST.XML

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />      
<application>
    <receiver android:name="com.polifrete.polifreteFunctions.MyReceiver" >
        <intent-filter>
            <action android:name="android.intent.action.BOOT_COMPLETED" />
            <action android:name="android.intent.action.QUICKBOOT_POWERON"/>
        </intent-filter>
    </receiver>
    <service
        android:name="com.polifrete.polifreteFunctions.NotificationService"
        android:launchMode="singleTask" >
    </service>
</application>

服务

package com.polifrete.polifreteFunctions;

import com.polifrete.polifreteandroid.MainActivity;

import android.app.NotificationManager;
import android.app.PendingIntent;
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.support.v4.app.NotificationCompat;
import android.util.Log;

public class NotificationService extends Service {

public static final int time = 60 * 1000;

@Override
public IBinder onBind(Intent arg0) {
    // TODO Auto-generated method stub
    return null;
}

@Override
public void onCreate() {
    Log.i("Script", "Passou SERVICE CREATE");
    super.onCreate();
}

@Override
public void onStart(Intent intent, int startId) {
    Log.i("Script", "Passou SERVICE START");
}

@Override
public void onDestroy() {
    Log.i("Script", "Passou SERVICE DESTROY");
    super.onDestroy();
}

@Override
public int onStartCommand(Intent intent, int flags, int startId) {
    Log.i("Script", "Passou SERVICE COMMAND");
    final Thread t = new Thread() {
        @Override
        public void run() {
            try {
                while(true){
                    Thread.sleep(time);
                    showNotification();
                }
            } catch (InterruptedException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    };
    t.start();
    return Service.START_STICKY;
}

public void showNotification() {

    Intent intent = new Intent(this, MainActivity.class);
    PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent,
            PendingIntent.FLAG_UPDATE_CURRENT);

    NotificationCompat.Builder n = new NotificationCompat.Builder(this)
            .setContentTitle("Test Notification")
            .setContentText("Test Notification.")
            .setSmallIcon(
                    com.polifrete.polifreteandroid.R.drawable.ic_actionbar)
            .setContentIntent(pIntent);

    NotificationManager notificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

    notificationManager.notify((int)(Math.random()*10000), n.build());

}

}

广播

package com.polifrete.polifreteFunctions;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.util.Log;

public class MyReceiver extends BroadcastReceiver {

@Override
public void onReceive(Context context, Intent intent) {
    // TODO Auto-generated method stub
    Log.i("Script", "Passou RECEIVER");
    Intent i = new Intent(context, NotificationService.class);
    context.startService(i);
}
}

Answer 1

首次安装应用程序后，除非用户手动打开，否则它将处于禁用状态。因此，在应用程序处于禁用状态之前，所有组件（如服务、广播接收器和活动）也将处于禁用状态。因此，除了手动干预之外，您的应用程序不会从任何外部事件中打开。因此，您需要至少手动打开一次应用程序才能接收这些启动完成的意图。