Android简单实现BroadCastReceiver广播机制

时间：2023-03-09 04:29:56
Android简单实现BroadCastReceiver广播机制

Android中广播的作用是很明显的，当我们收到一条信息，可能我们的应用须要处理一些数据。可能我们开机。我们的应用也须要处理一些数据，这里都用到了广播机制，这里简单的实现了一个自己定义广播。看实例：

MyBroadcastReceiver.java

package com.example.broadcastreceiver;

import android.content.BroadcastReceiver;

import android.content.Context;

import android.content.Intent;

import android.widget.Toast;

public class MyBroadcastReceiver extends BroadcastReceiver {

@Override

public void onReceive(Context arg0, Intent arg1) {

// TODO Auto-generated method stub

Toast.makeText(arg0, "onReceive", Toast.LENGTH_SHORT).show();

}

}

MainActivity.java

package com.example.broadcastreceiver;

import android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

public class MainActivity extends Activity {

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Button btn = (Button)findViewById(R.id.button1);

btn.setOnClickListener(new OnClickListener(){

@Override

public void onClick(View arg0) {

// TODO Auto-generated method stub

Intent intent = new Intent();

intent.setAction("justsoso");

sendBroadcast(intent);

}});

}

@Override

public boolean onCreateOptionsMenu(Menu menu) {

// Inflate the menu; this adds items to the action bar if it is present.

getMenuInflater().inflate(R.menu.activity_main, menu);

return true;

}

}

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.example.broadcastreceiver"

android:versionCode="1"

android:versionName="1.0" >

<uses-sdk

android:minSdkVersion="8"

android:targetSdkVersion="16" />

<application

android:allowBackup="true"

android:icon="@drawable/ic_launcher"

android:label="@string/app_name"

android:theme="@style/AppTheme" >

<activity

android:name="com.example.broadcastreceiver.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=".MyBroadcastReceiver" >

<intent-filter>

<action android:name="justsoso" >

</action>

</intent-filter>

</receiver>

</application>

</manifest>

当点击按钮以后，就会返回广播触发的事件了

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