BroadcastReceiver 广播机制

实现一个BroadcastReceiver
public class MyAndroidReceiver extends BroadcastReceiver
override onReceive(Context context, Intents Intents)

注册BroadcastReceiver
在AndroidManifest.xml文件当中进行注册

 <receiver Android:name=“MyAndroidReceiver">
  <Intents-filter>
      <action Android:name=”com.great.action.NEW_BROADCAST”/>
    </Intents-filter>
</receiver>

 

在代码当中直接进行注册

 IntentsFilter filter = new IntentsFilter(NEW_BROADCAST );
MyAndroidReceiver MyAndroidReceiver = new MyAndroidReceiver();
registerReceiver(MyAndroidReceiver , filter);

 

1.XML注册

<receiver android:name="BroadcastReceiver_Demo1">
            <intent-filter>
                <action android:name="com.great.action.myaction"/>
            </intent-filter>
 </receiver> 

 

实现广播继承类

public class BroadcastReceiver_Demo1 extends BroadcastReceiver
{
    public BroadcastReceiver_Demo1()
    {
        System.out.println("BroadcastReceiver_Demo1  --> 构造函数！！！");
    }


    @Override
    public void onReceive(Context context, Intent intent)
    {
        System.out.println("BroadcastReceiver_Demo1  --> onReceive！！！");
        Bundle bundle = intent.getExtras();
        if(bundle != null)
        {
            Object[] arrObj = bundle.keySet().toArray();
            System.out.println("=====接收广播内容(开始)=====");
            for(int i = 0; i < arrObj.length; i++)  
            {
                String strKey = arrObj[i].toString();
                System.out.println("key=" + strKey + "  value=" + String.valueOf(bundle.get(strKey)));
            }
            System.out.println("=====接收广播内容(结束)=====");
        }
    }
}

广播发送类

//注册广播接收器，注册方法二：在代码中注册
//创建一个 BroadcastReceiver_Demo1对象，然后我们就要对他进行设置了
BroadcastReceiver_Demo1    bcr = new BroadcastReceiver_Demo1();  
//创建一个IntentFilter的对象，这就和上个例子中的intent-filter标签一样，我们要往里面添加过滤器
IntentFilter intentFilter = new IntentFilter();
//添加一个的 intent action，用来接收当时区改变的消息
//intentFilter.addAction(Intent.ACTION_TIMEZONE_CHANGED);

//添加一个的 intent action，用来接收自定义的消息
intentFilter.addAction("com.great.action.myaction");
//添加完过滤器后，就要将 BroadcastReceiver 对象和相应的过滤器注册在 Activity 上
BroadcastDemo1_Activity.this.registerReceiver(bcr, intentFilter); 
Toast.makeText(BroadcastDemo1_Activity.this, "注册广播接收器成功！！！", Toast.LENGTH_LONG).show();


//取消注册广播接收器，但带来的好处是，用户可以自己控制开关广播接收器，可控是一个比较大的优势。
//注销 BroadcastReceiver 的注册 
BroadcastDemo1_Activity.this.unregisterReceiver(bcr);

//发送广播
btnSendBroadcast.setOnClickListener(new OnClickListener()
{
    @Override
    public void onClick(View v)
    {
        Intent intent = new Intent();
        //实例化 Bundle 对象
        Bundle bundle = new Bundle();
        //设置 Bundle 对象的数据
        bundle.putString("ID", "1000");
        bundle.putString("Name", "张三");
        //在 Intent 对象中放入 Bundle 对象
        intent.putExtras(bundle);
        intent.setAction("com.great.action.myaction");
        sendBroadcast(intent);
    }
});