Client / Server Programming in Android

SDK
Install specific Android Versions through SDK Manager
Create / install an

Android Virtual Device (AVD)

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cotter

class EchoClientActivity extends Activity {
/** Called when the

activity is first created. */
private EditText portNumber;
private EditText hostName;
private EditText inputMsg;
private EditText resultMsg;
private InetAddress ia;
private Socket mySocket;
private InputStream isIn;
private PrintStream psOut;
private byte abIn[];

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setContentView(R.layout.main);
hostName = (EditText) findViewById(R.id.editText1);

portNumber = (EditText) findViewById(R.id.editText2);
resultMsg = (EditText) findViewById(R.id.editText3);
inputMsg = (EditText) findViewById(R.id.editText4);
}

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case R.id.button1: /* This is the connect button
String

sHostName = hostName.getText().toString();
int iPortNumber = Integer.parseInt(portNumber.getText().toString());
try {
ia = InetAddress.getByName(sHostName);
mySocket = new Socket (ia, iPortNumber); Toast.makeText(this,"We are now connected to: " + hostName + "\n", Toast.LENGTH_LONG).show();
} catch (Exception ex) {
Toast.makeText(this,"Connect to " + hostName + "failed. Exception" + ex + "\n", Toast.LENGTH_LONG).show();
}
break;

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*/
String sResponse, sTemp
String sInputMsg = inputMsg.getText().toString();
int iNumRead;
abIn

= new byte[1024];
try {
isIn = mySocket.getInputStream();
psOut = new PrintStream(mySocket.getOutputStream());
psOut.print(sInputMsg);
iNumRead = isIn.read(abIn,0,1024);
sTemp = new String(abIn, 0, iNumRead);
sResponse = "We got back: " + sTemp;
resultMsg.setText(sResponse);
} catch (Exception ex) {
Toast.makeText(this,"Send data failed. Exception" + ex + "\n",
Toast.LENGTH_LONG).show(); }
break;

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sTemp2;
try {
mySocket.close();
inputMsg.setText("");
sTemp2

= new String ("Goodbye ...");
resultMsg.setText(sTemp2);
} catch (Exception ex) {
Toast.makeText(this,"Close socket failed. Exception“
+ ex + "\n", Toast.LENGTH_LONG).show();
}
} //end of switch
} //end of myEchoHandler
} //end of EchoClientActivity

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class attr {
}
public static final class

color {
public static final int backgroundColor=0x7f050000;
}
public static final class drawable {
public static final int ic_launcher=0x7f020000;
}
public static final class layout {
public static final int main=0x7f030000;
}

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public static final int button1=0x7f060004;
public static

final int button2=0x7f060008;
public static final int button3=0x7f060009;
public static final int editText1=0x7f060001;
public static final int editText2=0x7f060003;
public static final int editText3=0x7f06000b;
public static final int editText4=0x7f060006;
public static final int linearLayout1=0x7f060007;
public static final int textView1=0x7f060000;
public static final int textView2=0x7f060002;
public static final int textView3=0x7f060005;
public static final int textView4=0x7f06000a;
}

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public static final int ConvertButton=0x7f040002;
public static

final int DefaultHost=0x7f040003;
public static final int DefaultPort=0x7f040004;
public static final int app_name=0x7f040001;
public static final int connectButton=0x7f040007;
public static final int hello=0x7f040000;
public static final int hostname=0x7f040005;
public static final int input=0x7f040008;
public static final int port=0x7f040006;
public static final int quit=0x7f04000b;
public static final int result=0x7f040009;
public static final int send=0x7f04000a;
}
}

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android:background="@color/backgroundColor"
android:orientation="vertical" >

android:id="@+id/textView1“ android:layout_width="wrap_content“
android:layout_height="wrap_content" android:text="@string/hostname"
android:textAppearance="?android:attr/textAppearanceMedium" />

android:id="@+id/editText1“ android:layout_width="201dp"
android:layout_height="wrap_content“
android:hint="@string/DefaultHost“ android:inputType="text" >

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android:layout_height="wrap_content"
android:text="@string/port"
android:textAppearance="?android:attr/textAppearanceMedium" />

android:id="@+id/editText2“ android:layout_width="73dp"
android:layout_height="wrap_content"
android:hint="@string/DefaultPort“ android:inputType="text"
android:width="100dp" />

android:id="@+id/button1"
android:layout_width="wrap_content“ android:layout_height="wrap_content"
android:onClick="myEchoHandler"
android:text="@string/connectButton" />

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android:layout_height="wrap_content"
android:text="@string/input"

android:textAppearance="?android:attr/textAppearanceMedium" />

android:id="@+id/editText4"
android:layout_width="match_parent"
android:inputType="text"
android:layout_height="wrap_content" />

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android:layout_height="wrap_content" >

android:id="@+id/button2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="myEchoHandler"
android:text="@string/send" />
android:id="@+id/button3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/quit" android:onClick="myEchoHandler"/>

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android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/result"

android:textAppearance="?android:attr/textAppearanceLarge" />

android:id="@+id/editText3"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:height="100dp"
android:inputType="textMultiLine" />

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name="app_name">Bob\'s EchoClient
#002864
Convert

name="DefaultHost">localhost
3456
Hostname
Port
Connect
User Input
Echo Results
Send Echo
Exit Echo

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>

android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
android:name=".EchoClientActivity"
android:label="@string/app_name" >

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is Java, with a full library of Android classes
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