Android演示如何接收广播消息

Android下面接收广播消息比较简单，主要实现步骤如下：

1. 在AndroidManifest.xml中添加receiver字段(里面有intent-filter过滤action)；
2. 从BroadcastReceiver扩展类，添加onReceive处理；

示例代码如下：

AndroidManifest.xml，这里演示的是监听来电事件

注意要先添加权限：

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

之后注册Receiver：

<receiver android:name="ReceiverBroadcast"><intent-filter ><action android:name="android.intent.action.PHONE_STATE" /></intent-filter></receiver>

ReceiverBroadcast.java代码中实现监听事件处理：

package com.freesoft.anttest;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.telephony.TelephonyManager;import android.util.Log;public class ReceiverBroadcast extends BroadcastReceiver {private static String TAG="BroadcastReceiver";public ReceiverBroadcast() {Log.i(TAG, "ReceiverBroadcast");}@Overridepublic void onReceive(Context arg0, Intent arg1) {Log.i(TAG, "onReceive");Bundle bundle = arg1.getExtras();          String phonenum= bundle.getString("incoming_number");          Log.i(TAG, "Phone Number is: "+phonenum);   }}