有序广播与无序广播案例

1、通过一个案例来讲解有序广播与无序广播的使用。
无序广播博是完全异步的，发送广播时所有监听设广播的广播接受者都会接收到此消息，但接收的顺序不确定。
有序广播，会按接受者的优先级接收，只有一个广播接受者能接收消息，在此广播接受者中逻辑执行完毕，才会继续传递。
案例效果图如下

activity_main.xml

 

 

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:tools="http://schemas.android.com/tools"

    android:id="@+id/activity_main"

    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"

    android:background="@drawable/stitch_one"

    tools:context="cn.edu.bzu.orderedbroadcast.MainActivity">

 

    <Button        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_centerHorizontal="true"

        android:layout_marginTop="80dp"

        android:onClick="send"

        android:text="发送有序广播"

        android:paddingLeft="5dp"

        android:paddingRight="5dp"

        android:background="#FBFBFF"

        android:textSize="20sp"/>

</RelativeLayout>

MainActivity

 

package cn.edu.bzu.orderedbroadcast;import android.content.Intent;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.view.View;

public class MainActivity extends AppCompatActivity {

 

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

    public void send(View view){

        Intent intent=new Intent();

        intent.setAction("Intercept_Stitch");

        sendOrderedBroadcast(intent,null);

    }

}

MyBroadcastReceiverOne.java

 

package cn.edu.bzu.orderedbroadcast;

import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.util.Log;

public class MyBroadcastReceiverOne extends BroadcastReceiver {

    public MyBroadcastReceiverOne() {

    }

 

    @Override

    public void onReceive(Context context, Intent intent) {

        Log.i("MyBroadcastReceiverOne","自定义的广播接收者One,接受到了");

    }

}

 

MyBroadcastReceiverTwo

 

 

 

package cn.edu.bzu.orderedbroadcast;

import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.util.Log;

public class MyBroadcastReceiverTwo extends BroadcastReceiver {

    public MyBroadcastReceiverTwo() {

    }

 

    @Override

    public void onReceive(Context context, Intent intent) {

        Log.i("MyBroadcastReceiverOne","自定义的广播接收者Two,接受到了");

    }

}

 

 

 

MyBroadcastReceiverThree

package cn.edu.bzu.orderedbroadcast;

import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.util.Log;

public class MyBroadcastReceiverThree extends BroadcastReceiver {

    public MyBroadcastReceiverThree() {

    }

 

    @Override

    public void onReceive(Context context, Intent intent) {

        Log.i("MyBroadcastReceiverOne","自定义的广播接收者Three,接受到了");

    }

}

 

清单文件

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="cn.edu.bzu.orderedbroadcast">

 

    <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>

        <!--注册广播接收者-->

        <receiver            android:name=".MyBroadcastReceiverOne"

            android:enabled="true"

            android:exported="true">

            <intent-filter android:priority="1000">

                <action android:name="Intercept_Stitch"></action>

            </intent-filter>

        </receiver>

        <receiver            android:name=".MyBroadcastReceiverTwo"

            android:enabled="true"

            android:exported="true">

            <intent-filter android:priority="200">

                <action android:name="Intercept_Stitch"></action>

            </intent-filter>

        </receiver>

        <receiver            android:name=".MyBroadcastReceiverThree"

            android:enabled="true"

            android:exported="true">

            <intent-filter android:priority="600">

                <action android:name="Intercept_Stitch"></action>

            </intent-filter>

        </receiver>

    </application>

</manifest>