Android ViewPager (SWIPE)

Hi guys Today I am going to show you how to use ViewPager as a image slide gallery. In this example you can swipe left or right to view image.
ViewPagers have built-in swipe gestures to transition through pages, and they display screen slide animations by default. ViewPagers  use PagerAdapters as a supply for new pages to display. 
I simply put the images to drawable folder and display on it ViewPager
Swipe Image Gallery By ViewPager:

 





















First you need to create the PagerAdapter.

ImageAdapter.java 

import android.content.Context;

import android.support.v4.view.PagerAdapter;

import android.support.v4.view.ViewPager;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ImageView;



public class ImageAdapter extends PagerAdapter {

    Context context;

    private int[] GalImages = new int[] {

        R.drawable.a,

        R.drawable.b,

        R.drawable.c,

        R.drawable.d,

        R.drawable.e,



    };

    ImageAdapter(Context context){

        this.context=context;

    }

    @Override

    public int getCount() {

      return GalImages.length;

    }



    @Override

    public boolean isViewFromObject(View view, Object object) {

      return view == ((ImageView) object);

    }



    @Override

    public Object instantiateItem(ViewGroup container, int position) {

      ImageView imageView = new ImageView(context);

      //int padding = context.getResources().getDimensionPixelSize(R.dimen.padding_medium);

      //imageView.setPadding(padding, padding, padding, padding);

      //imageView.setScaleType(ImageView.ScaleType.CENTER_INSIDE);

      imageView.setImageResource(GalImages[position]);

      ((ViewPager) container).addView(imageView, 0);

      return imageView;

    }



    @Override

    public void destroyItem(ViewGroup container, int position, Object object) {

      ((ViewPager) container).removeView((ImageView) object);

    }

  }

Then create the xml file and add the ViewPager in layout.

<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=".MainActivity" >
   
          <android.support.v4.view.ViewPager
          android:id="@+id/view_pager"
          android:layout_width="match_parent"
          android:layout_height="match_parent" />

</RelativeLayout> 

Then create main Activity and create the instance of ViewPager

import android.app.Activity;

import android.os.Bundle;

import android.support.v4.view.ViewPager;



public class MainActivity extends Activity {

  @Override

  public void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_main);



    ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager);

    ImageAdapter adapter = new ImageAdapter(this);

    viewPager.setAdapter(adapter);

  }

 
}

Stay Tune for next session happy coding :)