Android研究(3)

import android.content.Context; 
import android.content.Intent; 
 
public class MyBroadCastReceiver extends BroadcastReceiver{ 
    public MyBroadCastReceiver(){ 
        System.out.println("constructed!"); 
    } 
    @Override 
    public void onReceive(Context arg0, Intent arg1) { 
        // TODO Auto-generated method stub 
            System.out.println("OK"); 
    } 
 
} 
当系统收到短信信后就会输出OK，也就是执行上面的onReceive方法

 

方法二：通过代码注册广播

Java代码 
package cn.edu.design; 
 
import android.app.Activity; 
import android.content.IntentFilter; 
import android.os.Bundle; 
import cn.edu.subclass.MyBroadCastReceiver; 
 
public class AndroidBroadCastActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
     
     
    public void onCreate(Bundle savedInstanceState) { 
        super.onCreate(savedInstanceState); 
        setContentView(R.layout.main); 
         
        MyBroadCastReceiver my=new MyBroadCastReceiver(); 
        IntentFilter filter=new IntentFilter(); 
        filter.addAction("android.provider.Telephony.SMS_RECEIVED"); 
        this.registerReceiver(my, filter); 
 
         
    } 
} 
Java代码 
package cn.edu.subclass; 
 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 
 
public class MyBroadCastReceiver extends BroadcastReceiver{ 
    public MyBroadCastReceiver(){ 
        System.out.println("constructed!"); 
    } 
    @Override 
    public void onReceive(Context arg0, Intent arg1) { 
        // TODO Auto-generated method stub 
            System.out.println("OK");