简单的广播发送与接收

发送端：

 public class MainActivity extends Activity { //先在布局文件main.xml中定义一个Button

/*

  * 

  * <Button

  *  android:layout_width="fill_parent" 

  *  android:layout_height="wrap_content"

  *  android:text="@string/button_send"

  *  android:id="@+id/send_broadcast_button"

  *  />

  * 

  */





private Button send_broadcast_button; @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        send_broadcast_button = (Button) this.findViewById(R.id.send_broadcast_button);

        send_broadcast_button.setOnClickListener(new SendBroadcast());

    }

private class SendBroadcast implements View.OnClickListener {  @Override

  public void onClick(View v) {

   

   Intent intent = new Intent();

   intent.setAction("cn.abel.action.broadcast");

   

   //要发送的内容

   intent.putExtra("author", "Abel");

   

   //发送 一个无序广播

   MainActivity.this.sendBroadcast(intent);

  }

  

}

}

 

接收端：

public class MainActivity extends Activity {

    /** Called when the activity is first created. */

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.main);

        IntentFilter intentFilter = new IntentFilter();

        intentFilter.addAction("cn.abel.action.broadcast");

        this.registerReceiver(new MyBroadcastReciver(), intentFilter);

    }

    private class MyBroadcastReciver extends BroadcastReceiver {  @Override

  public void onReceive(Context context, Intent intent) {

   String action = intent.getAction();

   if(action.equals("cn.abel.action.broadcast")) {

    String author = intent.getStringExtra("author");

    

    //在控制台显示接收到的广播内容

    System.out.println("author==>"+author);

    

    //在android端显示接收到的广播内容

    Toast.makeText(MainActivity.this, author, 1).show();

    

    //在结束时可取消广播

    //MainActivity.this.unregisterReceiver(this);

   }

  }

     

    }

}