Service（一）----->简单计算

xml:

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     tools:context="com.zzw.server.MainActivity" >

     <EditText
         android:id="@+id/editText1"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignParentTop="true"
         android:layout_centerHorizontal="true"
         android:layout_marginTop="58dp"
         android:ems="10"
         android:inputType="number" >

         <requestFocus />
     </EditText>

     <EditText
         android:id="@+id/editText2"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignLeft="@+id/editText1"
         android:layout_below="@+id/editText1"
         android:layout_marginTop="68dp"
         android:ems="10"
         android:inputType="number" />

     <Button
         android:id="@+id/button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_alignParentBottom="true"
         android:layout_centerHorizontal="true"
         android:layout_marginBottom="85dp"
         android:text="相加" />

 </RelativeLayout>

activity_main.xml

MainActivity:

 package com.zzw.server;

 import android.app.Activity;
 import android.content.Intent;
 import android.os.Bundle;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.EditText;

 public class MainActivity extends Activity {
     EditText et1, et2;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
         findViewById(R.id.button).setOnClickListener(new OnClickListener() {

             @Override
             public void onClick(View v) {
                 init();
             }
         });
     }

     public void init() {
         et1 = (EditText) findViewById(R.id.editText1);
         et2 = (EditText) findViewById(R.id.editText2);
         Intent intent = new Intent(MainActivity.this, TestServer.class);
         int a = Integer.parseInt(et1.getText().toString());
         int b = Integer.parseInt(et2.getText().toString());
         int num[] = { a, b };
         intent.putExtra(Canshu.KEY, num);
         startService(intent);//开始

     }

     @Override
     protected void onDestroy() {
         super.onDestroy();
         Intent intent = new Intent(MainActivity.this, TestServer.class);
         stopService(intent);//结束
     }

 }

Server:

 package com.zzw.server;

 import android.app.Service;
 import android.content.Intent;
 import android.os.IBinder;
 import android.util.Log;
 import android.widget.Toast;

 public class TestServer extends Service {
     //开始只运行一次
     @Override
     public void onCreate() {
         Log.d("=========", "我开始了");
         super.onCreate();
     }

     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
         int num[] = intent.getIntArrayExtra(Canshu.KEY);
         int sum = num[0] + num[1];
         Toast.makeText(TestServer.this, sum + "", 1).show();
         return super.onStartCommand(intent, flags, startId);
     }

     @Override
     public IBinder onBind(Intent intent) {
         // TODO Auto-generated method stub
         return null;
     }

     @Override
     public void onDestroy() {
         Log.d("======", "我被干掉了");
         super.onDestroy();
     }

 }

AndroidManifest.xml：

 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.zzw.server"
     android:versionCode="1"
     android:versionName="1.0" >

     <uses-sdk
         android:minSdkVersion="14"
         android:targetSdkVersion="21" />

     <application
         android:allowBackup="true"
         android:icon="@drawable/ic_launcher"
         android:label="@string/app_name"
         android:theme="@style/AppTheme" >
         <activity
             android:name=".MainActivity"
             android:label="@string/app_name" >
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />

                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
         <!-- 注册服务器 -->
         <service android:name="com.zzw.server.TestServer" >
         </service>
     </application>

 </manifest>