mars老师[Android开发视频教学] 01_22 广播机制（2）

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello"
/>
<Button
android:id="@+id/register"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="绑定监听器"
/>
<Button
android:id="@+id/unregister"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="解除监听器绑定"
/>

</LinearLayout>

package mars.testbc2;

import android.app.Activity;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;

public class TestBC2Activity extends Activity {
/** Called when the activity is first created. */
private Button registerButton = null;
private Button unregisterButton = null;
private SMSReceiver smsReceiver = null;

private static final String SMS_ACTION = "android.provider.Telephony.SMS_RECEIVED";
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
registerButton = (Button)findViewById(R.id.register);
registerButton.setOnClickListener(new RegisterReceiverListener());
unregisterButton = (Button)findViewById(R.id.unregister);
unregisterButton.setOnClickListener(new UnRegisterReceiverListener());
}

class RegisterReceiverListener implements OnClickListener{

@Override
public void onClick(View v) {
//生成一个BroiadcastReceiver对象
smsReceiver = new SMSReceiver();
//生成一个IntentFilter对象
IntentFilter filter = new IntentFilter();
//为IntentFilter添加一个Action
filter.addAction(SMS_ACTION);
//将BroadcastReceiver对象注册到系统当中
TestBC2Activity.this.registerReceiver(smsReceiver, filter);
}

}

class UnRegisterReceiverListener implements OnClickListener{

@Override
public void onClick(View v) {
//解除BroadcastReceiver对象的注册
TestBC2Activity.this.unregisterReceiver(smsReceiver);
}

}
}

package mars.testbc2;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.telephony.SmsMessage;

public class SMSReceiver extends BroadcastReceiver{

@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
System.out.println("receive message");

//接受Intent对象当中的数据
Bundle bundle = intent.getExtras();
//在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[] myOBJpdus = (Object[]) bundle.get("pdus");
//创建一个SmsMessage类型的数组
SmsMessage[] messages = new SmsMessage[myOBJpdus.length];
System.out.println(messages.length);
for (int i = 0; i<myOBJpdus.length; i++)
{
//使用Object数组当中的对象创建SmsMessage对象
messages[i] = SmsMessage.createFromPdu((byte[]) myOBJpdus[i]);
//调用SmsMessage对象的getDisppalyMessageBody()方法，就可以得到消息的内容
System.out.println(messages[i].getDisplayMessageBody());
}
}

}

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