android 广播 android Service 开机启动的Service
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android 广播 android Service 开机启动的Service
- package com.webabcd.service;
- import android.app.Activity;
- import android.content.BroadcastReceiver;
- import android.content.ComponentName;
- import android.content.Context;
- import android.content.Intent;
- import android.content.IntentFilter;
- import android.content.ServiceConnection;
- import android.os.Bundle;
- import android.os.IBinder;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.TextView;
- /*
- * startService() 和 bindService() 的区别
- * startService() - 正常理解就好
- * bindService() - 使当前上下文对象(本例中就是 Activity)通过一个 ServiceConnection 对象邦定到指定的 Service 。这样,如果上下文对象销毁了的话,那么其对应的 Service 也会被销毁
- */
- public class Main extends Activity implements OnClickListener {
- private TextView txtMsg;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- setTitle("android 之 service");
- this.findViewById(R.id.btnStart).setOnClickListener(this);
- this.findViewById(R.id.btnStop).setOnClickListener(this);
- this.findViewById(R.id.btnBind).setOnClickListener(this);
- this.findViewById(R.id.btnUnbind).setOnClickListener(this);
- txtMsg = (TextView)this.findViewById(R.id.txtMsg);
- // 实例化自定义的 BroadcastReceiver
- receiver = new UpdateReceiver();
- IntentFilter filter = new IntentFilter();
- // 为 BroadcastReceiver 指定 action ,使之用于接收同 action 的广播
- filter.addAction("com.webabcd.service.msg");
- // 以编程方式注册 BroadcastReceiver 。就是在代码中注册
- //配置方式注册 BroadcastReceiver 的例子见 AndroidManifest.xml 文件
- // 一般在 OnStart 时注册,在 OnStop 时取消注册
- this.registerReceiver(receiver, filter);
- // this.unregisterReceiver(receiver);
- }
- @Override
- public void onClick(View v) {
- Intent intent = new Intent(Main.this, MyService.class);
- switch (v.getId()) {
- case R.id.btnStart:
- this.startService(intent);
- break;
- case R.id.btnStop:
- this.stopService(intent);
- break;
- case R.id.btnBind:
- this.bindService(intent, conn, Context.BIND_AUTO_CREATE);
- break;
- case R.id.btnUnbind:
- this.unbindService(conn);
- break;
- }
- }
- // bindService() 所需的 ServiceConnection 对象
- private ServiceConnection conn = new ServiceConnection() {
- @Override
- public void onServiceConnected(ComponentName className, IBinder service) {
- }
- @Override
- public void onServiceDisconnected(ComponentName className) {
- }
- };
- private String msg="";
- private UpdateReceiver receiver;
- // 实现一个 BroadcastReceiver,用于接收指定的 Broadcast
- public class UpdateReceiver extends BroadcastReceiver{
- @Override
- public void onReceive(Context context, Intent intent) {
- msg = intent.getStringExtra("msg");
- txtMsg.append(msg + "/n");
- }
- }
- }
- package com.webabcd.service;
- import android.content.BroadcastReceiver;
- import android.content.Context;
- import android.content.Intent;
- import android.util.Log;
- public class MyBootReceiver extends BroadcastReceiver {
- // 用于接收满足条件的 Broadcast(相应的 Broadcast 的注册信息详见 AndroidManifest.xml ,当系统启动完毕后会调用这个广播接收器)
- //当开机的时候就会启动这个Service
- @Override
- public void onReceive(Context arg0, Intent arg1) {
- Log.d("MyDebug", "onReceive");
- // 启动服务
- Intent service = new Intent(arg0, MyService.class);
- arg0.startService(service);
- }
- }
- package com.webabcd.service;
- import android.app.Service;
- import android.content.Intent;
- import android.os.IBinder;
- import android.util.Log;
- // 演示 Service 的生命周期。具体信息运行程序后在 LogCat 中查看
- public class MyService extends Service {
- @Override
- public IBinder onBind(Intent intent) {
- Log.d("MyDebug", "onBind");
- sendMsg("onBind");
- // TODO Auto-generated method stub
- return null;
- }
- @Override
- public void onCreate() {
- // TODO Auto-generated method stub
- super.onCreate();
- Log.d("MyDebug", "onCreate");
- sendMsg("onCreate");
- }
- @Override
- public void onDestroy() {
- // TODO Auto-generated method stub
- super.onDestroy();
- Log.d("MyDebug", "onDestroy");
- sendMsg("onDestroy");
- }
- @Override
- public void onRebind(Intent intent) {
- // TODO Auto-generated method stub
- super.onRebind(intent);
- Log.d("MyDebug", "onRebind");
- sendMsg("onRebind");
- }
- @Override
- public void onStart(Intent intent, int startId) {
- super.onStart(intent, startId);
- Log.d("MyDebug", "onStart");
- sendMsg("onStart");
- }
- @Override
- public boolean onUnbind(Intent intent) {
- Log.d("MyDebug", "onUnbind");
- sendMsg("onUnbind");
- // TODO Auto-generated method stub
- return super.onUnbind(intent);
- }
- // 发送广播信息
- private void sendMsg(String msg){
- // 指定广播目标的 action (注:指定了此 action 的 receiver 会接收此广播)
- Intent intent = new Intent("com.webabcd.service.msg");
- // 需要传递的参数
- intent.putExtra("msg", msg);
- // 发送广播
- this.sendBroadcast(intent);
- }
- }
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- <?xml version="1.0" encoding="utf-8"?>
- <manifest xmlns:android="http://schemas.android.com/apk/res/android"
- package="com.webabcd.service" android:versionCode="1"
- android:versionName="1.0">
- <application android:icon="@drawable/icon" android:label="@string/app_name">
- <activity android:name=".Main" android:label="@string/app_name">
- <intent-filter>
- <action android:name="android.intent.action.MAIN" />
- <category android:name="android.intent.category.LAUNCHER" />
- </intent-filter>
- </activity>
- <!--
- 如果有需要用到的 service ,则都要在这里做相应的配置
- -->
- <service android:name=".MyService"></service>
- <!--
- 注册一个 BroadcastReceiver
- 其 intent-filter 为 android.intent.action.BOOT_COMPLETED(用于接收系统启动完毕的 Broadcast)
- -->
- <receiver android:name=".MyBootReceiver">
- <intent-filter>
- <action android:name="android.intent.action.BOOT_COMPLETED" />
- </intent-filter>
- </receiver>
- </application>
- <!--
- 接受系统启动完毕的 Broadcast 的权限
- -->
- <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
- <uses-sdk android:minSdkVersion="3" />
- </manifest>
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