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>

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>