bindService与startService区别

 1 package com.stone.test2;  2  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.Message;  9 import android.support.v7.app.ActionBarActivity;  10 import android.os.Bundle;  11 import android.view.Menu;  12 import android.view.MenuItem;  13 import android.view.View;  14 import android.widget.EditText;  15 import android.widget.TextView;  16  17 import java.util.logging.Handler;  18 import java.util.logging.LogRecord;  19  20  21 public class MainActivity extends ActionBarActivity implements View.OnClickListener, ServiceConnection {  22  23 private EditText edittext;  24 private TextView textview;  25 private MyService.MyBinder myBinder;  26  27  @Override  28 protected void onCreate(Bundle savedInstanceState) {  29 super.onCreate(savedInstanceState);  30  setContentView(R.layout.activity_main);  31 edittext= (EditText) findViewById(R.id.edittext);  32 textview= (TextView) findViewById(R.id.textview);  33 System.out.println("onCreate");  34 findViewById(R.id.btnStart).setOnClickListener(this);  35 findViewById(R.id.btnStop).setOnClickListener(this);  36 findViewById(R.id.btnBindService).setOnClickListener(this);  37 findViewById(R.id.btnUnbindService).setOnClickListener(this);  38 findViewById(R.id.btnSyn).setOnClickListener(this);  39  40  }  41  42  @Override  43 protected void onActivityResult(int requestCode, int resultCode, Intent data) {  44 super.onActivityResult(requestCode, resultCode, data);  45 textview.setText(data.getStringExtra("data"));  46  }  47  48  @Override  49 public boolean onCreateOptionsMenu(Menu menu) {  50 // Inflate the menu; this adds items to the action bar if it is present.  51  getMenuInflater().inflate(R.menu.menu_main, menu);  52 return true;  53  54  }  55  56  @Override  57 public boolean onOptionsItemSelected(MenuItem item) {  58 // Handle action bar item clicks here. The action bar will  59 // automatically handle clicks on the Home/Up button, so long  60 // as you specify a parent activity in AndroidManifest.xml.  61 int id = item.getItemId();  62  63 //noinspection SimplifiableIfStatement  64 if (id == R.id.action_settings) {  65 return true;  66  }  67  68 return super.onOptionsItemSelected(item);  69  }  70  71  @Override  72 public void onClick(View v) {  73 switch (v.getId()) {  74 case R.id.btnStart:  75 // System.out.println("who are you");  76 Intent intent = new Intent(this,MyService.class); //starService通过intent把数据传给MyService  77 intent.putExtra("data",edittext.getText().toString());  78  startService(intent);  79 break;  80 case R.id.btnStop: //stopService  81 stopService(new Intent(this, MyService.class));  82 break;  83 case R.id.btnBindService: //binService，通过实现ServiceConnection，将数据传给MyService  84 bindService(new Intent(this,MyService.class),this, Context.BIND_AUTO_CREATE);  85 break;  86 case R.id.btnUnbindService:  87 unbindService(this);  88 break;  89 case R.id.btnSyn: //同步数据，将数据传给MyService  90 if (myBinder!=null){  91  myBinder.setData(edittext.getText().toString());  92  }  93 break;  94  }  95  }  96  97  @Override  98 public void onServiceConnected(ComponentName name, IBinder service) {  99 myBinder = (MyService.MyBinder) service; //同步数据，将数据传给MyService 100 myBinder.getService().setCallback(new MyService.callBack() { //获取MyService传来的数据 101  @Override 102 public void onDataChange(String data) { //因为在MyService中是在另一个线程中调用onDataChange，所以通过handler将数据传送给UI线程 103 Message msg = new Message(); 104 Bundle bundle = new Bundle(); 105 bundle.putString("data",data); 106  msg.setData(bundle); 107  handler.sendMessage(msg); 108  } 109  }); 110  } 111 112  @Override 113 public void onServiceDisconnected(ComponentName name) { 114 115  } 116 117 private android.os.Handler handler = new android.os.Handler(){ //通过Handler获取工作线程传来的数据，并显示在TextView中 118  @Override 119 public void handleMessage(Message msg) { 120 super.handleMessage(msg); 121 textview.setText(msg.getData().getString("data")); 122  } 123  }; 124 }

 1 package com.stone.test2;  2  3 import android.app.Service;  4 import android.content.Intent;  5 import android.os.Binder;  6 import android.os.IBinder;  7  8 public class MyService extends Service {  9 private String data; 10 private boolean running; 11 12 public MyService() { 13  } 14 15  @Override 16 public IBinder onBind(Intent intent) { 17 return new MyBinder(); 18  } 19 20 public class MyBinder extends Binder{ 21 22 public void setData(String data){ //bindservice方式获取Activity传送来的数据 23 MyService.this.data=data; 24  } 25 26 public MyService getService(){ //返回MyService 27 return MyService.this; 28  } 29  } 30 31  @Override 32 public int onStartCommand(Intent intent, int flags, int startId) { 33 data = intent.getStringExtra("data"); //startService方式获取Activity传送来的数据 34 return super.onStartCommand(intent, flags, startId); 35  } 36 37  @Override 38 public void onCreate() { 39 super.onCreate(); 40 running = true; 41 new Thread(){ 42  @Override 43 public void run() { 44 super.run(); 45 int i = 0; 46 // System.out.println("fucking"); 47 while (running) { 48 i++; 49 String str=i+":" + data; 50 if (callback!=null) { 51  callback.onDataChange(str); 52  } 53  System.out.println(str); 54 try { 55 sleep(1000); 56 } catch (InterruptedException e) { 57  e.printStackTrace(); 58  } 59  } 60  } 61  }.start(); 62 63  } 64 65  @Override 66 public void onDestroy() { 67 super.onDestroy(); 68 running = false; 69  } 70 71 private callBack callback = null; 72 73 public void setCallback(callBack callback){ 74 this.callback = callback; 75  } 76 77 public callBack getCallback(){ 78 return callback; 79  } 80 81 public static interface callBack{ //bindService通过回调函数将数据传送给Activity 82 void onDataChange(String data); 83  } 84 }