【移动应用开发技术】Android 中怎么在有序广播中添加自定义权限

【移动应用开发技术】Android中怎么在有序广播中添加自定义权限

这篇文章给大家介绍Android中怎么在有序广播中添加自定义权限，内容非常详细，感兴趣的小伙伴们可以参考借鉴，希望对大家能有所帮助。Android中在有序广播中添加自定义权限的实例有序广播说明：有序广播因为要处理消息的处理结果，所以要复杂一些。*sendOrderedBroadcast(Intentintent,StringreceiverPermission,BroadcastReceiverresultReceiver,Handlerscheduler,intinitialCode,StringinitialData,BundleinitialExtras);如果只是想让广播可以按优先级来收取，并不在意处理的结果，可以用下面的版本：*sendOrderedBroadcast(Intentintent,StringreceiverPermission);同样，在多用户环境下，也可以选择给哪个用户发广播：*sendOrderedBroadcastAsUser(Intentintent,UserHandleuser,StringreceiverPermission,BroadcastReceiverresultReceiver,Handlerscheduler,intinitialCode,StringinitialData,BundleinitialExtras);首先我们要在AndroidManifest.xml中自定义一个权限,格式参考系统自带的权限,Android.permission.XXXXX,只要是xxx.peimission.XXXXXX就行,如果不按照这个格式,那么这个权限可能没法使用。<?xml

version="1.0"

encoding="utf-8"?>

<manifest

xmlns:android="/apk/res/android"

package="com.example.lsj.broadcasttest">

<span

>

<permission

android:name="test.permission.TEST"

android:protectionLevel="normal"

></permission></span>

<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="ent.action.MAIN"

/>

<category

android:name="ent.category.LAUNCHER"

/>

</intent-filter>

</activity>

<receiver

android:name=".MyReceiver"

android:enabled="true"

android:exported="true">

<intent-filter

android:priority="20">

<action

android:name="hahaha"

/>

</intent-filter>

</receiver>

<receiver

android:name=".MyReceiver2"

android:enabled="true"

android:exported="true">

<intent-filter

android:priority="19">

<action

android:name="hahaha"

/>

</intent-filter>

</receiver>

</application>

<span

>

<uses-permission

android:name="test.permission.TEST"/></span>

</manifest>然后使用sendOrderedBroadcast(intent,"test.permission.TEST");就可以发送有序广播了,当然发送广播之前还要指定一下接受者的优先级,优先级越高,android:priority指定的数字就越大。取值的范围是:-1000~1000这个就不详细叙述了。public

class

MainActivity

extends

AppCompatActivity

{

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Button

send=

(Button)

findViewById(R.id.send);

send.setOnClickListener(new

View.OnClickListener()

{

@Override

public

void

onClick(View

v)

{

Intent

intent=new

Intent();

intent.setAction("hahaha");

intent.putExtra("msg","一个简单的消息");

sendOrderedBroadcast(intent,"test.permission.TEST");

}

});

}

}第一个BroadcastReceiver在接收到广播的时候,如果想要添加一些自己的东西进去,可以先创建一个Bundle对象,并且存入数据。然后通过setResultExtras(bundle),把这个bundle添加到原来的消息中,ublic

class

MyReceiver

extends

BroadcastReceiver

{

public

MyReceiver()

{

}

@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();

Bundle

bundle=new

Bundle();

bundle.putString("first","第一个BroadCast存入的消息!");

setResultExtras(bundle);

}

}下一个BroadcastReceiver通过getResultExtras可以将信息提取出来。ublic

class

MyReceiver2

extends

BroadcastReceiver

{

public

MyReceiver2()

{

}

@Override

public

void

onReceive(Context

context,

Intent

intent)

{

//

TODO:

This

method

is

called

when

the

BroadcastReceiver

is

receiving

Bundle

bundle=getResultExtras(true);

String

first=bundle.getS