uandisolution

How to change Background color by selecting color from Listview

activitymain.xml file::>

<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="com.example.listviewexample.Second"
    android:id="@+id/rel1"

     >

</RelativeLayout>

Java File code

MainACtivity.java

package com.example.listviewexample;

import java.util.ArrayList;

import android.support.v7.app.ActionBarActivity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Adapter;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.ListView;

public class MainActivity extends ActionBarActivity {
ListView l1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        ArrayList<String> color=new ArrayList<String>();
        color.add("YELLOW");
        color.add("BLUE");
        color.add("RED");
        color.add("BLACK");
        color.add("GREEN");


        ArrayAdapter<String> ad=new ArrayAdapter<String>(getApplicationContext(), android.R.layout.simple_list_item_1, color);

    l1=(ListView) findViewById(R.id.listView1);
    l1.setAdapter(ad);
    l1.setOnItemClickListener(new OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
                long arg3) {
            // TODO Auto-generated method stub
            String col;
            col= arg0.getItemAtPosition(arg2).toString();
            Intent i=new Intent(getApplicationContext(),Second.class);
            i.putExtra("color", col);
            startActivity(i);

        }
    });

    }


}

SecondActivity.java

package com.example.listviewexample;

import android.R.integer;
import android.support.v7.app.ActionBarActivity;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Color;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.RelativeLayout;
import android.widget.TextView;

public class Second extends ActionBarActivity {
   TextView txt1;
   RelativeLayout r1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);
        r1= (RelativeLayout) findViewById(R.id.rel1);
        Intent i= getIntent();
        String colr=i.getStringExtra("color");


    //txt1.setText("YOUR SELECTED COLOR IS "+colr);
    // int colc= Integer.parseInt(colr);


    // r1.setBackgroundColor(Color.BLACK);
    if(colr.equals("BLACK"))
    {
        r1.setBackgroundColor(Color.BLACK);
    }
    else if(colr.equals("BLUE"))
    {
        r1.setBackgroundColor(Color.BLUE);

    }
    else if(colr.equals("YELLOW"))
    {
        r1.setBackgroundColor(Color.YELLOW);

    }
    else if(colr.equals("GREEN"))
    {
        r1.setBackgroundColor(Color.GREEN);

    }
    else if(colr.equals("RED"))
    {
        r1.setBackgroundColor(Color.RED);

    }
    else
    {
        r1.setBackgroundColor(Color.CYAN);

    }

    }


}

Simple example of Polymorphisam in java

interface a{

    String CompanyName=null;
    public void set();
    public void get();
}

class b{

    public static void display()
    {
        System.out.println("THIS IS CLASS B");
    }
}
public class PolymorphisomExample extends b implements a{

    public static void main(String Dx[]){

        PolymorphisomExample PlEx=new PolymorphisomExample();
        b b1=new b();
        b.display();

    }

    @Override
    public void set() {
        // TODO Auto-generated method stub

    }

    @Override
    public void get() {
        // TODO Auto-generated method stub

    }
}

how to create Interface example in java

interface cars{
    String CarName=null;
    int CarModelNo=0;
    public void display();

}
public class InterFaceExample implements cars{

    String CarName="Maruti";
    @Override
    public void display() {
        // TODO Auto-generated method stub
        System.out.println("Car Name :"+CarName);
    }
    public static void main(String Dx[])
    {

        InterFaceExample IntEx=new InterFaceExample();
        IntEx.display();
    }

}

Simple Encapsulation example in java

class test
{
String Name=null;
int age;
String occupation=null;
public void set(String name,int age1,String occ)
{
    Name=name;
    age=age1;
    occupation=occ;
}
public void get()
{

    System.out.println("-------YOUR PERSONAL INFORMATION------");
    System.out.println("NAME :"+Name);
    System.out.println("AGE :"+age);
    System.out.println("OCCUPATION :"+occupation);

}

}
public class EncapsulationExample extends test{
    public static void main(String Dx[])
    {
        test t1=new test();
        t1.set("Dx Panchal",23,"TRAINEE");
        t1.get();

    }

}

How to create abstract class in java

abstract class NewCars{
    String CarsName=null;
    public void display(String CN)
    {
        this.CarsName=CN;
        System.out.println("CarName :"+CarsName);
    }

}
public class AbstractionExample extends NewCars{

    public static void main(String Dx[])
    {
        AbstractionExample absEx=new AbstractionExample();

        absEx.display("New i30");

    }
}

How to use TreeSet in java

import java.util.ArrayList;
import java.util.Iterator;
import java.util.TreeSet;

public class TreeSetExample {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        TreeSet<String> name=new TreeSet<>();
        name.add("Dx");
        name.add("Ravi");
        name.add("mitul");
        name.add("Dhaval");
        name.add("Bittu");

        Iterator<String> it=name.iterator();
        while(it.hasNext())
        {
            System.out.println(it.next());
        }
    }

}

How to use simple String array in java

import java.util.*;
public class SimpleArray {

    public static void main(String[] Dx) {
        // TODO Auto-generated method stub

        String[] name = new String[5];
        name[0]="Dx ";
        name[1]="RAvi ";
        name[2]="Mitul";
        name[3]="Brijesh";
        name[4]="Dhaval";


        for(int i=0;i<5;i++)
        {
        System.out.println(" "+name[i]);

        }
    }
}

Thursday 22 January 2015