android 广播的总结

一.广播的发送:

     //发送广播        Intent intent = new Intent();        //广播的标记        intent.setAction("hello");        //传递的信息.        intent.putExtra("msg", "nihao");        sendBroadcast(intent);

二.广播接受者静态注册,清单文件

1.定义一个类继承BroadCastReceiver,重写recevier方法

public class MyRecevier extends BroadcastReceiver {    private static final String TAG = "MyRecevier";    @Override    public void onReceive(Context context, Intent intent) {        System.out.println(intent.getAction() + "=====" + intent.getStringExtra("msg"));    }}

2.清单文件注册,其中intentFilter中的aciton可以是自定义发送广播的acttion内容,也可以是系统广播的action

三.动态注册广播,通过代码实现,优先级大于清单文件

    public void regresiter(View view) {        IntentFilter filter = new IntentFilter();        filter.addAction("hello");        registerReceiver(mDemoReceiver, filter);    }    private class DemoReceiver extends BroadcastReceiver {        @Override        public void onReceive(Context context, Intent intent) {            System.out.println(intent.getAction() + "regresiter" + intent.getStringExtra("msg"));        }    }

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