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

来源：互联网发布：日系进口厨刀知多少编辑：程序博客网时间：2024/05/16 04:44

上一篇简单介绍了广播的发送，这篇主要介绍下，有序广播的发送。

设置完相关属性的时候，广播就会按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。

代码如下：

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;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);button = (Button) findViewById(R.id.button1);button.setOnClickListener(new View.OnClickListener() {@Overridepublic 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 {@Overridepublic 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 {@Overridepublic 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 {@Overridepublic 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(很关键)：

<?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>

需要源码的读者可以到我的资源中下载。

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