package com.lxt008;import android.app.Activity;import android.content.Context;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class Main extends Activity implements OnClickListener  {    private MyService  mMyService;       private TextView mTextView;       private Button startServiceButton;       private Button stopServiceButton;         private Context mContext;              public void onCreate(Bundle savedInstanceState) {           super.onCreate(savedInstanceState);           setContentView(R.layout.main);           setupViews();       }              public void setupViews(){                 mContext = Main.this;                 mTextView = (TextView)findViewById(R.id.text);                           startServiceButton = (Button)findViewById(R.id.startservice);           stopServiceButton = (Button)findViewById(R.id.stopservice);                    startServiceButton.setOnClickListener(this);           stopServiceButton.setOnClickListener(this);               }         public void onClick(View v) {                 if(v == startServiceButton){               Intent i  = new Intent();               i.setClass(Main.this, MyService.class);               mContext.startService(i);           }else if(v == stopServiceButton){               Intent i  = new Intent();               i.setClass(Main.this, MyService.class);               mContext.stopService(i);           }     }        }

package com.lxt008;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 {        // 定义个一个Tag标签    private static final String TAG = "MyService";       // 一个Binder类，用在onBind()有方法里，这样Activity那边可以获取到    private MyBinder mBinder = new MyBinder();         public IBinder onBind(Intent intent) {           Log.e(TAG, "start IBinder~~~");           return mBinder;       }          public void onCreate() {           Log.e(TAG, "start onCreate~~~");           super.onCreate();       }        public void onStart(Intent intent, int startId) {           Log.e(TAG, "start onStart~~~");           super.onStart(intent, startId);        }            public void onDestroy() {           Log.e(TAG, "start onDestroy~~~");           super.onDestroy();       }            public boolean onUnbind(Intent intent) {           Log.e(TAG, "start onUnbind~~~");           return super.onUnbind(intent);       }          public String getSystemTime(){                   Time t = new Time();           t.setToNow();           return t.toString();       }            public class MyBinder extends Binder{           MyService getService()           {               return MyService.this;           }       }  }

<?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" /></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"      package="com.lxt008"      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>　　　　<!-- 添加注册 -->        <service android:name=".MyService" android:exported="true"></service>       </application>    <uses-sdk android:minSdkVersion="7" /></manifest>