Android学习笔记(二十)

Android广播机制(二)

BroadcastReceiverActivity

package org.wp.activity;import android.app.Activity;import android.content.IntentFilter;import android.os.Bundle;import android.view.View;import android.widget.Button;public class BroadcastReceiverActivity extends Activity {private Button registerButton;private Button unregisterButton;private SMSBroadcastReceiver smsReceiver;private static final String SMS_ACTION = "android.provider.Telephony.SMS_RECEIVED";@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.main);registerButton = (Button) this.findViewById(R.id.registerButton);unregisterButton = (Button) this.findViewById(R.id.unregisterButton);registerButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// 生成一个BroadcastReceiver对象smsReceiver = new SMSBroadcastReceiver();// 生成一个IntentFilter对象IntentFilter filter = new IntentFilter();// 为IntentFilter添加一个Actionfilter.addAction(SMS_ACTION);// 注册BroadcastReceiverBroadcastReceiverActivity.this.registerReceiver(smsReceiver,filter);}});unregisterButton.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {// 解除BroadcastReceiver对象的注册BroadcastReceiverActivity.this.unregisterReceiver(smsReceiver);}});}}

SMSBroadcastReceiver

package org.wp.activity;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.telephony.SmsMessage;import android.util.Log;public class SMSBroadcastReceiver extends BroadcastReceiver {private static final String TAG = "SMSBroadcastReceiver";@Overridepublic void onReceive(Context context, Intent intent) {Log.i(TAG, "onReceive()");// 接收Intent对象当中的数据Bundle bundle = intent.getExtras();// Bundle对象当中有一个属性名为pdus，这个属性的值是一个Object数组Object[] objects = (Object[]) bundle.get("pdus");// 创建一个SmsMessage类型的数组SmsMessage[] messages = new SmsMessage[objects.length];for (int i = 0; i < messages.length; i++) {// 使用Object数组当中的对象创建SmsMessage对象messages[i] = SmsMessage.createFromPdu((byte[]) objects[i]);// 调用SmsMessage对象的getDisplayMessageBody()方法，就可以得到消息的内容Log.i(TAG, messages[i].getDisplayMessageBody());}}}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"package="org.wp.activity" android:versionCode="1" android:versionName="1.0"><application android:icon="@drawable/icon" android:label="@string/app_name"><activity android:name=".BroadcastReceiverActivity"android:label="@string/app_name"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity></application><uses-permission android:name="android.permission.RECEIVE_SMS" /><uses-sdk android:minSdkVersion="4" /></manifest>

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