1.新建工程ServiceDemo

2.設定main.xml

 <?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" > <TextView android:id="@+id/text" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" /> <Button android:id="@+id/startservice" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="startService" /> <Button android:id="@+id/stopservice" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="stopService" /> <Button android:id="@+id/bindservice" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="bindService" /> <Button android:id="@+id/unbindservice" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="unbindService" /> </LinearLayout>

 3.新建MyService.java

package com.tutor.servicedemo; import android.app.Service; import android.content.Intent; import android.os.Binder; import android.os.IBinder; import android.text.format.Time; import android.util.Log; public class MyService extends Service { //定義個一個Tag標籤 private static final String TAG = "MyService"; //這裡定義吧一個Binder類，用在onBind()有方法裡，這樣Activity那邊可以獲取到 private MyBinder mBinder = new MyBinder(); @Override public IBinder onBind(Intent intent) { Log.e(TAG, "start IBinder~~~"); return mBinder; } @Override public void onCreate() { Log.e(TAG, "start onCreate~~~"); super.onCreate(); } @Override public void onStart(Intent intent, int startId) { Log.e(TAG, "start onStart~~~"); super.onStart(intent, startId); } @Override public void onDestroy() { Log.e(TAG, "start onDestroy~~~"); super.onDestroy(); } @Override public boolean onUnbind(Intent intent) { Log.e(TAG, "start onUnbind~~~"); return super.onUnbind(intent); } //這裡我寫了一個獲取當前時間的函式，不過沒有格式化就先這麼著吧 public String getSystemTime(){ Time t = new Time(); t.setToNow(); return t.toString(); } public class MyBinder extends Binder{ MyService getService() { return MyService.this; } } }

4.修改ServiceDemo.java

package com.tutor.servicedemo; import android.app.Activity; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.ServiceConnection; import android.os.Bundle; import android.os.IBinder; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.TextView; public class ServiceDemo extends Activity implements OnClickListener{ private MyService mMyService; private TextView mTextView; private Button startServiceButton; private Button stopServiceButton; private Button bindServiceButton; private Button unbindServiceButton; private Context mContext; //這裡需要用到ServiceConnection在Context.bindService和context.unBindService()裡用到 private ServiceConnection mServiceConnection = new ServiceConnection() { //當我bindService時，讓TextView顯示MyService裡getSystemTime()方法的返回值 public void onServiceConnected(ComponentName name, IBinder service) { // TODO Auto-generated method stub mMyService = ((MyService.MyBinder)service).getService(); mTextView.setText("I am frome Service :" + mMyService.getSystemTime()); } public void onServiceDisconnected(ComponentName name) { // TODO Auto-generated method stub } }; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); setupViews(); } public void setupViews(){ mContext = ServiceDemo.this; mTextView = (TextView)findViewById(R.id.text); startServiceButton = (Button)findViewById(R.id.startservice); stopServiceButton = (Button)findViewById(R.id.stopservice); bindServiceButton = (Button)findViewById(R.id.bindservice); unbindServiceButton = (Button)findViewById(R.id.unbindservice); startServiceButton.setOnClickListener(this); stopServiceButton.setOnClickListener(this); bindServiceButton.setOnClickListener(this); unbindServiceButton.setOnClickListener(this); } public void onClick(View v) { // TODO Auto-generated method stub if(v == startServiceButton){ Intent i = new Intent(); i.setClass(ServiceDemo.this, MyService.class); mContext.startService(i); }else if(v == stopServiceButton){ Intent i = new Intent(); i.setClass(ServiceDemo.this, MyService.class); mContext.stopService(i); }else if(v == bindServiceButton){ Intent i = new Intent(); i.setClass(ServiceDemo.this, MyService.class); mContext.bindService(i, mServiceConnection, BIND_AUTO_CREATE); }else{ mContext.unbindService(mServiceConnection); } } }

5.在AndroidManifest.xml中註冊Servie

<service android:name=".MyService" android:exported="true"></service>