Android BroadcastReceiver实例Demo（有序广播的发送）

上一篇简介了广播的发送，这篇主要介绍下，有序广播的发送。

设置完相关属性的时候，广播就会依照有序的方式进行发送：

发送顺序：

先发送第二条广播；

再发送第一条广播；

最后发送第三条广播。

代码例如以下：

布局文件：

activity_main(一个Button)：

<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"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context=".MainActivity" >
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:text="点击发送有序广播" />
</RelativeLayout>

MainActivity：

package com.android_broadcasereceiverdemo2;
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 {
private Button button;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setAction("myaction");
intent.putExtra("name", "梅西");
sendOrderedBroadcast(intent, null);
}
});
}
}

FirstBroadcast：

package com.android_broadcasereceiverdemo2;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
public class FirstBroadcast extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String name = intent.getStringExtra("name");
Toast.makeText(context, "第一条广播已发送..."+name, Toast.LENGTH_SHORT).show();
//
abortBroadcast();//当加上这条代码的时候，广播发送到此结束，即第三条广播不会再收到。
}
}

SecondBroadcast：

package com.android_broadcasereceiverdemo2;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
public class SecondBroadcast extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String name = intent.getStringExtra("name");
Toast.makeText(context, "第二条广播已发送..."+name, Toast.LENGTH_SHORT).show();
}
}

ThirdBroadcast：

package com.android_broadcasereceiverdemo2;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.widget.Toast;
public class ThirdBroadcast extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
String name = intent.getStringExtra("name");
Toast.makeText(context, "第三条广播已发送..."+name, Toast.LENGTH_SHORT).show();
}
}

AndroidManifest.xml(非常关键)：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.android_broadcasereceiverdemo2"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="11"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.android_broadcasereceiverdemo2.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".FirstBroadcast" >
<!-- 有序广播中，priority数值越大，优先级越大，也就越先发送！！ -->
<intent-filter android:priority="99">
<action android:name="myaction" />
</intent-filter>
</receiver>
<receiver android:name=".SecondBroadcast" >
<intent-filter android:priority="100">
<action android:name="myaction" />
</intent-filter>
</receiver>
<receiver android:name=".ThirdBroadcast" >
<intent-filter android:priority="98">
<action android:name="myaction" />
</intent-filter>
</receiver>
</application>
</manifest>

须要源代码的读者能够到我的资源中下载。