我是 android 新手,我正在尝试使用广播接收器做一个应用程序,当设备上的墙纸发生变化时,它会将消息发送到通知栏。它已成功安装在设备上,但未按预期工作。这是代码
WallPagerNotificationReceiver.java
import android.app.Notification;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.util.Log;
import android.widget.Toast;
public class WallPaperNotificationReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
this.sendNotification(context, "You have changed Wallpaper");
}
private void sendNotification(Context ctx, String message)
{
//Get the notification manager
String ns = Context.NOTIFICATION_SERVICE;
NotificationManager nm =
(NotificationManager)ctx.getSystemService(ns);
//Create Notification Object
int icon = R.drawable.ic_launcher;
CharSequence tickerText = "Hello";
long when = System.currentTimeMillis();
Notification notification =
new Notification(icon, tickerText, when);
//Set ContentView using setLatestEvenInfo
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setData(Uri.parse("http://www.google.com"));
PendingIntent pi = PendingIntent.getActivity(ctx, 0, intent, 0);
notification.setLatestEventInfo(ctx, "Intimation", message, pi);
//Send notification
nm.notify(1, notification);
Toast.makeText(ctx,"Hello Nawin",Toast.LENGTH_LONG).show();
}
}
清单.xlm
<xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="in.ac.srmuniv"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="15" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<receiver android:name=".WallPaperNotificationReceiver">
<intent-filter>
<action android:name="android.intent.action.WALLPAPER_CHANGED" />
</intent-filter>
</receiver>
</application>
</manifest>
这是使用广播接收器的正确方法吗?如果是这样,请帮助我在哪里做错了?
提前致谢。
PS:我没有使用活动或服务。根据进程生命周期,我们可以通过托管广播接收器来拥有前台进程http://developer.android.com/guide/components/processes-and-threads.html#Threads