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1、广播接收者注册
一旦应用部署,广播接收者就生效了,直到用户手动停止应用或者应用被删除
需要广播接收者运行时,使用代码注册,不需要时,可以使用代码解除注册
特殊广播接收者,必须代码注册。电量改变、屏幕开关,必须使用代码注册
2、注册广播接收者
//创建广播接收者对象
receiver = new ScreenOnOffReceiver();
//通过IntentFilter对象指定广播接收者接收什么类型的广播
IntentFilter filter = new IntentFilter();
filter.addAction(Intent.ACTION_SCREEN_OFF);
filter.addAction(Intent.ACTION_SCREEN_ON);
//注册广播接收者
registerReceiver(receiver, filter);
* 解除注册广播接收者
unregisterReceiver(receiver);
* 解除注册之后,广播接收者将失去作用
1 package com.itheima.register; 2 3 import android.content.BroadcastReceiver; 4 import android.content.Context; 5 import android.content.Intent; 6 7 public class ScreenOnOFFReceiver extends BroadcastReceiver { 8 9 @Override 10 public void onReceive(Context context, Intent intent) { 11 12 String action = intent.getAction(); 13 if(Intent.ACTION_SCREEN_ON.equals(action)){ 14 System.out.println("屏幕开啦啦"); 15 } 16 else if(Intent.ACTION_SCREEN_OFF.equals(action)){ 17 System.out.println("屏幕关哇哇"); 18 } 19 20 } 21 22 }
1 package com.itheima.register; 2 3 import android.app.Service; 4 import android.content.Intent; 5 import android.content.IntentFilter; 6 import android.os.IBinder; 7 8 public class RegisterService extends Service { 9 10 private ScreenOnOFFReceiver receiver; 11 12 @Override 13 public IBinder onBind(Intent intent) { 14 // TODO Auto-generated method stub 15 return null; 16 } 17 18 @Override 19 public void onCreate() { 20 super.onCreate(); 21 //1.创建广播接收者对象 22 receiver = new ScreenOnOFFReceiver(); 23 //2.创建意图过滤器对象 24 IntentFilter filter = new IntentFilter(); 25 //指定接收什么广播 26 filter.addAction(Intent.ACTION_SCREEN_OFF); 27 filter.addAction(Intent.ACTION_SCREEN_ON); 28 //3.注册广播接收者 29 registerReceiver(receiver, filter); 30 31 } 32 33 @Override 34 public void onDestroy() { 35 super.onDestroy(); 36 //反注册广播接收者 37 unregisterReceiver(receiver); 38 } 39 40 }
1 package com.itheima.register; 2 3 import android.os.Bundle; 4 import android.app.Activity; 5 import android.content.Intent; 6 import android.view.Menu; 7 import android.view.View; 8 9 public class MainActivity extends Activity { 10 11 @Override 12 protected void onCreate(Bundle savedInstanceState) { 13 super.onCreate(savedInstanceState); 14 setContentView(R.layout.activity_main); 15 } 16 17 18 public void start(View v){ 19 Intent intent = new Intent(this, RegisterService.class); 20 startService(intent); 21 } 22 public void stop(View v){ 23 Intent intent = new Intent(this, RegisterService.class); 24 stopService(intent); 25 } 26 27 }
服务注册广播
3、服务的分类
远程服务
1 package com.itheima.remoteservice; 2 3 import com.itheima.remoteservice.PublicBusiness.Stub; 4 5 import android.app.Service; 6 import android.content.Intent; 7 import android.os.Binder; 8 import android.os.IBinder; 9 10 public class RemoteService extends Service{ 11 12 @Override 13 public IBinder onBind(Intent intent) { 14 System.out.println("绑定"); 15 return new FengMiShu(); 16 } 17 18 class FengMiShu extends Stub{ 19 20 @Override 21 public void qianXian() { 22 // TODO Auto-generated method stub 23 remoteBanZheng(); 24 } 25 26 } 27 28 @Override 29 public boolean onUnbind(Intent intent) { 30 System.out.println("解绑"); 31 return super.onUnbind(intent); 32 } 33 34 @Override 35 public void onCreate() { 36 System.out.println("创建"); 37 super.onCreate(); 38 } 39 40 @Override 41 public int onStartCommand(Intent intent, int flags, int startId) { 42 System.out.println("开始"); 43 return super.onStartCommand(intent, flags, startId); 44 } 45 46 @Override 47 public void onDestroy() { 48 System.out.println("摧毁"); 49 super.onDestroy(); 50 } 51 52 public void remoteBanZheng(){ 53 System.out.println("苗领导在国外远程办证"); 54 } 55 56 }
1 package com.itheima.remoteservice; 2 3 import android.os.Bundle; 4 import android.app.Activity; 5 import android.view.Menu; 6 7 public class MainActivity extends Activity { 8 9 @Override 10 protected void onCreate(Bundle savedInstanceState) { 11 super.onCreate(savedInstanceState); 12 setContentView(R.layout.activity_main); 13 } 14 15 16 @Override 17 public boolean onCreateOptionsMenu(Menu menu) { 18 // Inflate the menu; this adds items to the action bar if it is present. 19 getMenuInflater().inflate(R.menu.main, menu); 20 return true; 21 } 22 23 }
1 <?xml version="1.0" encoding="utf-8"?> 2 <manifest xmlns:android="http://schemas.android.com/apk/res/android" 3 package="com.itheima.remoteservice" 4 android:versionCode="1" 5 android:versionName="1.0" > 6 7 <uses-sdk 8 android:minSdkVersion="8" 9 android:targetSdkVersion="17" /> 10 11 <application 12 android:allowBackup="true" 13 android:icon="@drawable/ic_launcher" 14 android:label="@string/app_name" 15 android:theme="@style/AppTheme" > 16 <activity 17 android:name="com.itheima.remoteservice.MainActivity" 18 android:label="@string/app_name" > 19 <intent-filter> 20 <action android:name="android.intent.action.MAIN" /> 21 22 <category android:name="android.intent.category.LAUNCHER" /> 23 </intent-filter> 24 </activity> 25 <service android:name="com.itheima.remoteservice.RemoteService"> 26 <intent-filter > 27 <action android:name="com.itheima.remote"/> 28 </intent-filter> 29 </service> 30 </application> 31 32 </manifest>
调用远程服务操作
package com.itheima.runremoteservice; public interface PublicBusiness { void qianXian(); }
1 package com.itheima.runremoteservice; 2 3 import android.os.Bundle; 4 import android.os.IBinder; 5 import android.app.Activity; 6 import android.content.ComponentName; 7 import android.content.Intent; 8 import android.content.ServiceConnection; 9 import android.view.Menu; 10 import android.view.View; 11 12 public class MainActivity extends Activity { 13 14 public PublicBusiness pb; 15 private MyConn conn; 16 17 @Override 18 protected void onCreate(Bundle savedInstanceState) { 19 super.onCreate(savedInstanceState); 20 setContentView(R.layout.activity_main); 21 22 conn = new MyConn(); 23 } 24 25 26 public void start(View v){ 27 Intent intent = new Intent(); 28 intent.setAction("com.itheima.remote"); 29 startService(intent); 30 } 31 public void stop(View v){ 32 Intent intent = new Intent(); 33 intent.setAction("com.itheima.remote"); 34 stopService(intent); 35 } 36 public void bind(View v){ 37 Intent intent = new Intent(); 38 intent.setAction("com.itheima.remote"); 39 bindService(intent, conn, BIND_AUTO_CREATE); 40 } 41 42 public void unbind(View v){ 43 unbindService(conn); 44 } 45 class MyConn implements ServiceConnection{ 46 47 @Override 48 public void onServiceConnected(ComponentName name, IBinder service) { 49 pb = (PublicBusiness) service; 50 51 } 52 53 @Override 54 public void onServiceDisconnected(ComponentName name) { 55 // TODO Auto-generated method stub 56 57 } 58 59 } 60 61 public void banZheng(View v){ 62 pb.qianXian(); 63 } 64 }
4、服务的分类
才
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原文地址:http://www.cnblogs.com/ecollab/p/5912656.html