【移動應用開發(fā)技術(shù)】Android中怎么使用本地廣播

這篇文章給大家介紹Android中怎么使用本地廣播，內(nèi)容非常詳細，感興趣的小伙伴們可以參考借鑒，希望對大家能有所幫助。MainActivity代碼package

com.example.luobo.mybroadcastreceiver;

import

android.content.BroadcastReceiver;

import

android.content.Context;

import

android.content.Intent;

import

android.content.IntentFilter;

import

android.support.v4.content.LocalBroadcastManager;

import

android.support.v7.app.AppCompatActivity;

import

android.os.Bundle;

import

android.view.View;

import

android.widget.Button;

import

android.widget.Toast;

public

class

MainActivity

extends

AppCompatActivity

implements

View.OnClickListener{

private

Button

button;

private

IntentFilter

intentFilter;

private

LocalBroadcastManager

localBroadcastManager

;

private

LocalReceiver

localReciiver;

@Override

protected

void

onCreate(Bundle

savedInstanceState)

{

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

button

=

(Button)findViewById(R.id.send_button);

button.setOnClickListener(this);

localBroadcastManager

=

LocalBroadcastManager.getInstance(this);//使用

intentFilter

=

new

IntentFilter();

intentFilter.addAction("com.example.luobo.mybroadcastreceiver.LOCAL_BROADCAST");

localReciiver

=

new

LocalReceiver();

localBroadcastManager.registerReceiver(localReciiver,intentFilter);

}

@Override

protected

void

onDestroy()

{

super.onDestroy();

localBroadcastManager.unregisterReceiver(localReciiver);

}

@Override

public

void

onClick(View

view)

{

Intent

intent

=

new

Intent("com.example.luobo.mybroadcastreceiver.LOCAL_BROADCAST");

localBroadcastManager.sendBroadcast(intent);

}

class

LocalReceiver

extends

BroadcastReceiver{

@Override

public

void

onReceive(Context

context,

Intent

intent)

{

Toast.makeText(context,"received

local

broadcast",Toast.LENGTH_SHORT).show();

}

}

}首先通過LocalBroadcastManager（本地廣播管理類）的getInstance(this)方法獲取實例，注冊廣播消息時是調(diào)用localBroadcastManager實例的registerReceiver(參數(shù)1,參數(shù)2)方法注冊（參數(shù)1是本地廣播接受者，參數(shù)2是過濾器只選擇接收特定的廣播消息），調(diào)用localBroadcastManager實例的sendBroadcast（Initentinitent）方法發(fā)送廣播消息。MyRecevitypackage

com.example.luobo.mybroadcastreceiver;

import

android.content.BroadcastReceiver;

import

android.content.Context;

import

android.content.Intent;

import

android.widget.Toast;

public

class

MyReceiver

extends

BroadcastReceiver

{

@Override

public

void

onReceive(Context

context,

Intent

intent)

{

Toast.makeText(context,"Received

in

MyBroadCastReceiver",Toast.LENGTH_SHORT).show();

abortBroadcast();

}

}activity_main.xml<?xml

version="1.0"

encoding="utf-8"?>

<android.support.constraint.ConstraintLayout

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

xmlns:app="/apk/res-auto"

xmlns:tools="/tools"

android:layout_width="match_parent"

android:layout_height="match_parent"

tools:context="com.example.luobo.mybroadcastreceiver.MainActivity">

<Button

android:id="@+id/send_button"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:text="發(fā)送廣播"/>

</android.support.constraint.ConstraintLayout>AndroidMainfest.aml<?xml

version="1.0"

encoding="utf-8"?>

<manifest

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

package="com.example.luobo.mybroadcastreceiver">

<application

android:allowBackup="true"

android:icon="@mipmap/ic_launcher"

android:label="@string/app_name"

android:roundIcon="@mipmap/ic_launcher_round"

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="100">

<action

android:name="co