Android-Service开发步骤

Main

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);   
        } 
    }        
}

MyService

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;   
        }   
    } 
 }

布局

<?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>

添加注册

<?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>