BroadcastReceiver广播接收者(一)——利用代码注册广播接收者

MainActivity如下:

package cc.testbroadcasta;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.content.IntentFilter;
/**
 * Demo描述:
 * 在代码中注册广播接收者
 * 1 在onCreate()中注册广播接收者
 * 2 在onDestroy()中取消注册广播接收者
 */
public class MainActivity extends Activity {
    private BroadcastReceiverTest mBroadcastReceiverTest;
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		//注册一个广播接收者
		registerAReceiver();
		//发送一个广播
		sendABroadcast();
	}

	private void registerAReceiver(){
		mBroadcastReceiverTest=new BroadcastReceiverTest();
		//为广播接收者设置IntentFilter
		IntentFilter intentFilter=new IntentFilter();
		intentFilter.addAction("cc.test");
		registerReceiver(mBroadcastReceiverTest, intentFilter);
	}

	private void sendABroadcast(){
		Intent intent = new Intent();
		// 设置Action
		intent.setAction("cc.test");
		// 携带数据
		intent.putExtra("name", "周星驰");
		intent.putExtra("number", 9527);
		// 发送广播
		sendBroadcast(intent);
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();
		//取消广播接收者的注册
		if (mBroadcastReceiverTest!=null) {
			unregisterReceiver(mBroadcastReceiverTest);
		}
	}

}

BroadcastReceiverTest如下:

package cc.testbroadcasta;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;

public class BroadcastReceiverTest extends BroadcastReceiver {

	@Override
	public void onReceive(Context context, Intent intent) {
          String name=intent.getStringExtra("name");
          int number=intent.getIntExtra("number", 0);
          System.out.println("接收到广播 name="+name+",number="+number);
	}

	public static void main(String[] args) {

	}

}

main.xml如下:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
   >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="在代码中注册广播接收者"
        android:layout_centerInParent="true"/>

</RelativeLayout>