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Here is source code of the Program to Set an Activity in Potrait Mode in Andorid. The program is successfully compiled and run on a Windows system using Eclipse Ide. The program output is also shown below.

MainActivity.java

package com.example.d_indicator;
 
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;
import android.widget.Toast;
 
public class MainActivity extends Activity implements OnClickListener {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
 
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
 
}

Activity_main.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"
    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" >
 
    <ImageButton
        android:id="@+id/taxi"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/metro"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/metro"
        android:layout_marginTop="33dp"
        android:src="@drawable/taxixx" />
 
    <ImageButton
        android:id="@+id/auto"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/taxi"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/taxi"
        android:layout_marginTop="31dp"
        android:src="@drawable/autoxx" />
 
    <ImageButton
        android:id="@+id/movies"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/auto"
        android:layout_alignRight="@+id/auto"
        android:layout_below="@+id/auto"
        android:layout_marginTop="36dp"
        android:src="@drawable/moviesxx" />
 
    <ImageButton
        android:id="@+id/metro"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="40dp"
        android:src="@drawable/metroxx" />
 
</RelativeLayout>

AndoridManifest.xml

Here is source code of the Program to Change of an Activity’s Icon in Andorid. The program is successfully compiled and run on a Windows system using Eclipse Ide. The program output is also shown below.

MainActivity.java

package com.example.d_indicator;
 
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
 
public class MainActivity extends Activity implements OnCheckedChangeListener {
 
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        // setting our activity to be full screen
        setContentView(R.layout.activity_main);
 
    }
 
}

Activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" 
    android:background="@drawable/taxi_back1">
 
    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/taxi_result"
        android:layout_alignParentLeft="true"
        android:layout_marginBottom="27dp"
        android:text="Your Total Fare"
        android:textColor="@android:color/black"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:textSize="20dp" />
 
    <EditText
        android:id="@+id/taxi__distance"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/textView2"
        android:layout_alignParentLeft="true"
        android:layout_marginBottom="26dp"
        android:ems="10" />
 
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/taxi__distance"
        android:layout_alignParentLeft="true"
        android:text="Enter Distance"
        android:textColor="@android:color/black"
        android:textAppearance="?android:attr/textAppearanceLarge" />
 
    <EditText
        android:id="@+id/taxi_result"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_above="@+id/taxi_button"
        android:layout_alignParentLeft="true"
        android:layout_marginBottom="36dp"
        android:ems="10" >
 
        <requestFocus />
    </EditText>
 
    <Button
        android:id="@+id/taxi_button"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_alignParentLeft="true"
        android:layout_alignRight="@+id/textView2"
        android:layout_marginBottom="36dp"
        android:background="@android:color/darker_gray"
        android:text="CALCULATE"
        android:textAlignment="viewStart"
        android:textColor="@android:color/black"
        android:textSize="15dp" />
 
    <Button
        android:id="@+id/taxi_reset"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_below="@+id/taxi_result"
        android:layout_toRightOf="@+id/taxi_result"
        android:background="@android:color/darker_gray"
        android:text="RESET"
        android:textAlignment="viewStart"
        android:textColor="@android:color/black"
        android:textSize="15dp" />
 
    <ImageButton
        android:id="@+id/taxi_phone"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:src="@drawable/phone" />
 
    <LinearLayout
        android:id="@+id/linearLayout1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/taxi_phone"
        android:orientation="horizontal"
        android:paddingBottom="40px"
        android:weightSum="2" >
 
        <RadioGroup
            android:id="@+id/taxi_rg1"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical" >
 
            <RadioButton
                android:id="@+id/taxi_day"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="DAY" />
 
            <RadioButton
                android:id="@+id/taxi_night"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="NIGHT" />
        </RadioGroup>
 
        <RadioGroup
            android:id="@+id/taxi_rg2"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:orientation="vertical"
            android:paddingLeft="70px" >
 
            <RadioButton
                android:id="@+id/taxi_ac"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="AC" />
 
            <RadioButton
                android:id="@+id/taxi_nonac"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="NON-AC" />
        </RadioGroup>
    </LinearLayout>
 
    <ImageButton
        android:id="@+id/taxi_arrow"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_toRightOf="@+id/taxi__distance"
        android:src="@drawable/arrow" />
 
</RelativeLayout>

AndoridManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.d_indicator"
    android:versionCode="1"
    android:versionName="1.0" >
 
    <uses-sdk
        android:minSdkVersion="16"
        android:targetSdkVersion="17" />
 
    <uses-feature
        android:glEsVersion="0x00020000"
        android:required="true" />
 
    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
      <!--to change icon specify the drawable in android:icon as shown -->
            <activity
            android:name="com.example.d_indicator.MainActivity"
            android:icon="@drawable/ic_launcher"
            android:label="@string/app_name"
            android:screenOrientation="portrait" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
 
</manifest>

Java Android Program to Set an Activity in Potrait Mode