Android发送广播Broadcast

<span style="font-size:14px;"><?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.leidong.broadcast">

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

<receiver android:name=".MyService">
<intent-filter >
<action android:name="com.example.leidong.action.MyReceiver"/>
</intent-filter>
</receiver>
</application>

</manifest></span>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#2b2b2b">

<Button
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="5pt"
android:layout_marginRight="5pt"
android:layout_marginTop="20pt"
android:text="S E N D"
android:textColor="#ffffff"
android:textStyle="bold"
android:id="@+id/send"
android:background="#696969"
android:layout_gravity="center_horizontal" />
</LinearLayout>

package com.example.leidong.broadcast;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

public class MainActivity extends Activity {
Button send;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);

//获取程序界面中的按钮
send = (Button)findViewById(R.id.send);
send.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//创建Intent
Intent intent = new Intent();
intent.setAction("com.example.leidong.action.MyReceiver");
intent.putExtra("msg", "简单的消息");
//发送广播
sendBroadcast(intent);
}
});
}
}

package com.example.leidong.broadcast;

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

/**
* Created by Lei Dong on 2016/09/05.
*/
public class MyReceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context,
"接收到的Intent的Action为：" + intent.getAction() + "\n 消息内容是：" + intent.getStringExtra("msg"),
Toast.LENGTH_LONG).show();
}
}