服务概述

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服务的生命周期

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服务的两种启动方式-启动方式（startService）

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MainActivity.java

  1. package com.bluelesson.servicedemo;
  3. import android.content.Intent;
  4. import android.support.v7.app.AppCompatActivity;
  5. import android.os.Bundle;
  6. import android.view.View;
  8. public class MainActivity extends AppCompatActivity {
  10.     @Override
  11.     protected void onCreate(Bundle savedInstanceState) {
  12.         super.onCreate(savedInstanceState);
  13.         setContentView(R.layout.activity_main);
  14.     }
  16.     public void btnstart1(View view) {
  17.         //1.创建Intent
  18.         Intent intent=new Intent();
  19.         //2.设置信息
  20.         intent.setClass(this,MyService.class);
  21.         // 3.启动服务
  22.         startService(intent);
  23.     }
  25.     public void btnstop1(View view) {
  26.         //1.创建Intent
  27.         Intent intent=new Intent();
  28.         //2.设置信息
  29.         intent.setClass(this,MyService.class);
  30.         // 3.关闭服务
  31.         stopService(intent);
  32.     }
  33. }

MyService.java

  1. package com.bluelesson.servicedemo;
  3. import android.app.Service;
  4. import android.content.Intent;
  5. import android.os.IBinder;
  6. import android.util.Log;
  8. public class MyService extends Service {
  9.     public MyService() {
  10.     }
  12.     @Override
  13.     public IBinder onBind(Intent intent) {
  14.         // TODO: Return the communication channel to the service.
  15.         throw new UnsupportedOperationException("Not yet implemented");
  16.     }
  18.     @Override
  19.     public void onCreate() {
  20.         super.onCreate();
  21.         Log.d("15pb","MyService::onCreate");
  22.     }
  24.     @Override
  25.     public int onStartCommand(Intent intent, int flags, int startId) {
  26.         Log.d("15pb","MyService::onStartCommand");
  27.         return super.onStartCommand(intent, flags, startId);
  28.     }
  30.     @Override
  31.     public void onDestroy() {
  32.         Log.d("15pb","MyService::onDestroy");
  33.         super.onDestroy();
  34.     }
  35. }

startService方式实例-电话监听器

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关键代码

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AndroidManifest.xml

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activity_main.xml

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MainActivity.java

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MyService.java

  1. package com.bluelesson.servicedemo;
  3. import android.app.Service;
  4. import android.content.Context;
  5. import android.content.Intent;
  6. import android.os.IBinder;
  7. import android.telephony.PhoneStateListener;
  8. import android.telephony.TelephonyManager;
  9. import android.util.Log;
  11. public class MyService extends Service {
  12.     public MyService() {
  13.     }
  15.     @Override
  16.     public IBinder onBind(Intent intent) {
  17.         // TODO: Return the communication channel to the service.
  18.         throw new UnsupportedOperationException("Not yet implemented");
  19.     }
  20.     public class MyPhoneListener extends PhoneStateListener{
  21.         @Override
  22.         public void onCallStateChanged(int state, String incomingNumber) {
  23.             super.onCallStateChanged(state, incomingNumber);
  24.             switch (state){
  25.                 case TelephonyManager.CALL_STATE_IDLE:
  26.                     Log.d("15pb","MyService::电话空闲");
  27.                     break;
  28.                 case TelephonyManager.CALL_STATE_OFFHOOK:
  29.                     Log.d("15pb","MyService::电话接听");
  30.                     break;
  31.                 case TelephonyManager.CALL_STATE_RINGING:
  32.                     Log.d("15pb","MyService::电话响铃");
  33.                     break;
  34.             }
  35.         }
  36.     }
  38.     private TelephonyManager mTm;
  39.     private MyPhoneListener mListener;
  42.     @Override
  43.     public void onCreate() {
  44.         super.onCreate();
  45.         Log.d("15pb","MyService::onCreate");
  46.         //初始化
  47.         //1.获取电话管理器
  48.         mTm=(TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
  49.         //2.创建监听器
  50.         mListener=new MyPhoneListener();
  51.         //3.益听
  52.         mTm.listen(mListener,PhoneStateListener.LISTEN_CALL_STATE);
  53.     }
  55.     @Override
  56.     public int onStartCommand(Intent intent, int flags, int startId) {
  57.         Log.d("15pb","MyService::onStartCommand");
  58.         return super.onStartCommand(intent, flags, startId);
  59.     }
  61.     @Override
  62.     public void onDestroy() {
  63.         Log.d("15pb","MyService::onDestroy");
  64.         super.onDestroy();
  65.         //取消监听
  66.         mTm.listen(mListener,PhoneStateListener.LISTEN_NONE);
  67.     }
  68. }

startService方式实例-计时器

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关键代码

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activity_main.xml

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MainActivity.java

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TimerService.java

  1. package com.bluelesson.servicedemo;
  3. import android.app.Service;
  4. import android.content.Intent;
  5. import android.os.IBinder;
  6. import android.util.Log;
  8. import java.util.Timer;
  9. import java.util.TimerTask;
  11. public class TimerService extends Service {
  12.     public TimerService() {
  13.     }
  15.     @Override
  16.     public IBinder onBind(Intent intent) {
  17.         // TODO: Return the communication channel to the service.
  18.         throw new UnsupportedOperationException("Not yet implemented");
  19.     }
  20.     private Timer mTimer;
  21.     private int mCount=0;
  22.     private String mShowText="当前计时:0";
  23.     @Override
  24.     public void onCreate() {
  25.         super.onCreate();
  26.         //1.创建定时器
  27.         mTimer=new Timer();
  28.         //2.创建定时器任务
  29.         TimerTask timerTask = new TimerTask() {
  30.             @Override
  31.             public void run() {
  33.                 Log.d("15pb",mShowText+mCount);
  35.                 //发送广播
  36.                 Intent intent=new Intent();
  37.                 intent.setAction("MyTimer");
  38.                 intent.putExtra("time",mCount);
  39.                 sendBroadcast(intent);
  40.                 mCount++;
  41.             }
  42.         };
  43.         //3.给定时器指定定时器任务
  44.         mTimer.schedule(timerTask,0,1000);
  46.     }
  48.     @Override
  49.     public int onStartCommand(Intent intent, int flags, int startId) {
  50.         mCount=0;//重置
  51.         return super.onStartCommand(intent, flags, startId);
  52.     }
  54.     @Override
  55.     public void onDestroy() {
  56.         super.onDestroy();
  57.         //取消定时器
  58.         if(mTimer!=null)
  59.         mTimer.cancel();
  60.         mTimer=null;
  61.     }
  62. }


服务的两种启动方式-绑定方式（bindService）

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绑定方式（bindService）实例-本地人员查询系统

实例

BindService.zip
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关键代码

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main_activity.xml

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IPersonListener.java

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MyBindService.java

  1. package com.bluelesson.bindservice;
  3. import android.app.Service;
  4. import android.content.Intent;
  5. import android.os.Binder;
  6. import android.os.IBinder;
  7. import android.util.Log;
  9. public class MyBindService extends Service {
  10.     public MyBindService() {
  11.     }
  13.     String strings[] = {"齐天大圣","猪八戒","沙和尚","白龙马"};
  14.     public class MyBinder extends Binder implements IPersonListener{
  16.         @Override
  17.         public String queryNameById(int id) {
  18.             if(id<0|| id>3) {
  19.                 return "唐 僧";
  20.             }
  21.             return strings[id];
  22.         }
  23.     }
  25.     public MyBinder myBinder;
  26.     @Override
  27.     public void onCreate() {
  28.         super.onCreate();
  29.         myBinder = new MyBinder();
  30.         Log.d("15pb","MyBindService::onCreate");
  31.     }
  32.     @Override
  33.     public IBinder onBind(Intent intent) {
  34.         // TODO: Return the communication channel to the service.
  35.         Log.d("15pb","MyBindService::onBind");
  36.         return myBinder;
  37.     }
  41.     @Override
  42.     public boolean onUnbind(Intent intent) {
  43.         Log.d("15pb","MyBindService::onUnbind");
  44.         if(myBinder!=null){
  45.             myBinder=null;
  46.         }
  47.         return super.onUnbind(intent);
  48.     }
  50.     @Override
  51.     public void onDestroy() {
  52.         super.onDestroy();
  53.     }
  54. }

MainActivity.java

  1. package com.bluelesson.bindservice;
  3. import android.content.ComponentName;
  4. import android.content.Context;
  5. import android.content.Intent;
  6. import android.content.ServiceConnection;
  7. import android.os.IBinder;
  8. import android.support.v7.app.AppCompatActivity;
  9. import android.os.Bundle;
  10. import android.view.View;
  11. import android.widget.EditText;
  12. import android.widget.TextView;
  14. public class MainActivity extends AppCompatActivity {
  16.     @Override
  17.     protected void onCreate(Bundle savedInstanceState) {
  18.         super.onCreate(savedInstanceState);
  19.         setContentView(R.layout.activity_main);
  21.         myServiceConnection = new MyServiceConnection();
  23.     }
  25.     private MyServiceConnection myServiceConnection;
  26.     private MyBindService.MyBinder myBinder;
  27.     public class MyServiceConnection implements ServiceConnection{
  29.         @Override
  30.         public void onServiceConnected(ComponentName componentName,
  31.                                        IBinder iBinder) {
  32.             myBinder = (MyBindService.MyBinder)iBinder;
  34.         }
  36.         @Override
  37.         public void onServiceDisconnected(ComponentName componentName) {
  40.         }
  41.     }
  42.     public void btnBind(View view) {
  43.         Intent intent=new Intent(this, MyBindService.class);
  44.         bindService(intent, myServiceConnection, Context.BIND_AUTO_CREATE);
  45.     }
  47.     public void btnUnBind(View view) {
  48.         Intent intent=new Intent(this, MyBindService.class);
  49.         unbindService(myServiceConnection);
  50.         stopService(intent);
  51.     }
  53.     public void btnQuery(View view) {
  54.         EditText editText = findViewById(R.id.edit_query);
  55.         String string = editText.getText().toString();
  56.         int num = Integer.parseInt(string);
  57.         if(myBinder!=null) {
  58.             String name = myBinder.queryNameById(num);
  59.             TextView textView = findViewById(R.id.tv1);
  60.             textView.setText(name);
  61.         }
  62.     }
  63. }

绑定方式（bindService）实例-远程人员查询系统

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关键代码

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AIDL的app

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MyBindService.java

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AndroidManifest.xml

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TestBindService.app（注意要把aidl文件夹复制过来）

activity_main.xml

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Activity.java(注意)

  1. package com.bluelesson.testbindservice;
  3. import android.content.ComponentName;
  4. import android.content.Context;
  5. import android.content.Intent;
  6. import android.content.ServiceConnection;
  7. import android.os.IBinder;
  8. import android.os.RemoteException;
  9. import android.support.v7.app.AppCompatActivity;
  10. import android.os.Bundle;
  11. import android.util.Log;
  12. import android.view.View;
  13. import android.widget.EditText;
  14. import android.widget.TextView;
  16. import com.bluelesson.bindservice.IPersonListenerAIDL;
  18. public class MainActivity extends AppCompatActivity {
  20.     @Override
  21.     protected void onCreate(Bundle savedInstanceState) {
  22.         super.onCreate(savedInstanceState);
  23.         setContentView(R.layout.activity_main);
  24.         myServiceConnection = new MyServiceConnection();
  26.     }
  28.     private MyServiceConnection myServiceConnection;
  29.    // private MyBindService.MyBinder myBinder;
  30.     IPersonListenerAIDL aidl;
  31.     public class MyServiceConnection implements ServiceConnection {
  33.         @Override
  34.         public void onServiceConnected(ComponentName componentName,
  35.                                        IBinder iBinder) {
  36.            // myBinder = (MyBindService.MyBinder)iBinder;
  37.             Log.d("15pb", "MyServiceConnection:: onServiceConnected");
  38.             aidl = IPersonListenerAIDL.Stub.asInterface(iBinder);
  40.         }
  42.         @Override
  43.         public void onServiceDisconnected(ComponentName componentName) {
  46.         }
  47.     }
  48.     public void btnBind(View view) {
  49.         Intent intent=new Intent("MyBindService");
  50.         bindService(intent, myServiceConnection, Context.BIND_AUTO_CREATE);
  51.     }
  53.     public void btnUnBind(View view) {
  54.         Intent intent=new Intent("MyBindService");
  55.         unbindService(myServiceConnection);
  56.         stopService(intent);
  57.     }
  59.     public void btnQuery(View view) {
  60.         EditText editText = findViewById(R.id.edit_query);
  61.         String string = editText.getText().toString();
  62.         int num = Integer.parseInt(string);
  63.         if(aidl!=null) {
  64.             String name = null;
  65.             try {
  66.                 name = aidl.queryNameById(num);
  67.             } catch (RemoteException e) {
  68.                 e.printStackTrace();
  69.             }
  70.             TextView textView = findViewById(R.id.tv1);
  71.             textView.setText(name);
  72.         }
  73.     }
  74. }

绑定方式（bindService）实例-远程人员查询系统（升级版）

服务的两种启动方式-双剑合璧