Service里发送广播实现Service实时向Activity传递数据案例

在Service组件中创建一个线程，该线程用来生产数值，每隔1秒数值自动加1并且方式广播到activity，activity里有个广播接收器，接受到数据，最后把更新后的数值在界面上实时显示。

新建一个Service类，用来实时生产数值，供界面实时显示。

package com.example.serviceandbroadcast;import android.app.Service;import android.content.Intent;import android.os.IBinder;import android.util.Log;public class CountService extends Service {private int count = 0;private boolean threadDisable = false;@Overridepublic void onCreate() {super.onCreate();new Thread(new Runnable() {@Overridepublic void run() {while (!threadDisable) {try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}count++;Log.v("CountService", "Count is " + count);// 发送广播Intent intent = new Intent();intent.putExtra("count", count);intent.setAction("com.ljq.activity.CountService");sendBroadcast(intent);}}}).start();}@Overridepublic IBinder onBind(Intent intent) {return null;}@Overridepublic void onDestroy() {super.onDestroy();count = 0;threadDisable = true;Log.v("CountService", "on destroy");}}

新建一个Activity类，定义一个广播接收器MyReceiver，接收数据，并在activity里显示数据。

package com.example.serviceandbroadcast;import android.app.Activity;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.os.Bundle;import android.widget.EditText;public class MainActivity extends Activity {private EditText editText = null;private MyReceiver receiver = null;@Overridepublic void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);editText = (EditText) findViewById(R.id.editText);// 启动服务startService(new Intent(MainActivity.this, CountService.class));// 动态注册广播接收器receiver = new MyReceiver();IntentFilter filter = new IntentFilter();filter.addAction("com.ljq.activity.CountService");MainActivity.this.registerReceiver(receiver, filter);}@Overrideprotected void onDestroy() {// 结束服务stopService(new Intent(MainActivity.this, CountService.class));super.onDestroy();}/** * 获取广播数据 *  * @author jiqinlin *  */public class MyReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {Bundle bundle = intent.getExtras();int count = bundle.getInt("count");editText.setText(count + "");}}}

main.xml布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent">    <EditText         android:layout_width="fill_parent"        android:layout_height="wrap_content"        android:cursorVisible="false"        android:editable="false"        android:id="@+id/editText"/> </LinearLayout>

清单文件

<span style="color:#4b4b4b;"><?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.example.serviceandbroadcast"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="8"        android:targetSdkVersion="21" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".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>                         </span><span style="color:#ff0000;"><service android:name ="com.example.serviceandbroadcast.CountService" /></span><span style="color:#4b4b4b;">    </application></manifest></span>