3

activity_main.xml:  //overover

<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"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/app1"
        android:layout_width="132dp"
        android:layout_height="wrap_content"
        android:text=" 发送APP1" />

    <Button
        android:id="@+id/app4"
        android:layout_width="132dp"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textview"
        android:layout_centerVertical="true"
        android:text=" 发送APP4" />

    <Button
        android:id="@+id/app3"
        android:layout_width="132dp"
        android:layout_height="wrap_content"
        android:layout_above="@+id/app4"
        android:layout_alignLeft="@+id/app4"
        android:layout_marginBottom="16dp"
        android:text=" 发送APP3" />

    <Button
        android:id="@+id/app2"
        android:layout_width="132dp"
        android:layout_height="wrap_content"
        android:layout_above="@+id/app3"
        android:layout_alignLeft="@+id/app3"
        android:layout_marginBottom="21dp"
        android:text=" 发送APP2" />

    <TextView
        android:id="@+id/textview"
        android:layout_width="132dp"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/app1"
        android:layout_below="@+id/app4"
        android:layout_marginTop="76dp" />

    <TextView
        android:layout_width="132dp"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/app4"
        android:layout_below="@+id/app4"
        android:layout_marginTop="26dp"
        android:text="收到的显示是: " />

</RelativeLayout>

AndroidManifest.xml: //overover

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

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="18" />

    <uses-permission android:name="android.permission.INTERNET" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name="com.example.sockettest.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>

        <service android:name="com.example.sockettest.DataService" >
            <intent-filter>
 
            </intent-filter>
        </service>
    </application>

</manifest>