Android BroadcastRecevier广播消息

代码注册Receiver

 @Override    protected void onCreate(Bundle savedInstanceState) {        IntentFilter intentFilter = new IntentFilter();        intentFilter.addAction("");        MyBroadcast myBroadcast = new MyBroadcast();        registerReceiver(myBroadcast, intentFilter);    }

AndroidManifest.xml

    <receiver android:name=".MyBroadcast">            <intent-filter>                <action android:name="shortcut.song.com.myapplication.MY_BROADCAST"/>            </intent-filter>        </receiver>

MyBroadcast .java

package shortcut.song.com.myapplication;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.widget.Toast;/** * Created by Administrator on 2017/8/16 0016. */public class MyBroadcast extends BroadcastReceiver {    @Override    public void onReceive(Context context, Intent intent) {        Toast.makeText(context, "接收到的Intent Action为："+intent.getAction() +                        " \n  消息内容:"+intent.getStringExtra("msg")                        , Toast.LENGTH_SHORT).show();    }}

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="shortcut.song.com.myapplication.BroadcastTestActivity">    <Button        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="SendBroadcast"        android:onClick="sendBroadCast"/></LinearLayout>

package shortcut.song.com.myapplication;import android.content.Intent;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;public class BroadcastTestActivity extends AppCompatActivity {    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_broadcast_test);    }    public void sendBroadCast(View v) {        Intent intent = new Intent();        intent.setAction("shortcut.song.com.myapplication.MY_BROADCAST");        intent.putExtra("msg", "简单的消息");        //发送广播        sendBroadcast(intent);    }}