Android Example of ViewPager with custom PagerAdapter - By Naman Tiwari

Example of ViewPager with custom PagerAdapter

This example show how to implement ViewPager with custom PagerAdapter.

Modify activity_main.xml to include android.support.v4.view.ViewPager in layout.

<LinearLayout 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"
    android:orientation="vertical"
    tools:context="com.example.androidviewpagerapp.MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center_horizontal"
        android:autoLink="web"
        android:text="http://android-er.blogspot.com/"
        android:textStyle="bold" />
    
    <android.support.v4.view.ViewPager
        android:id="@+id/myviewpager"
        android:layout_width="match_parent"
        android:layout_height="match_parent"/>
        
</LinearLayout>

MainActivity.java

package com.example.androidviewpagerapp;

import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;
import android.app.Activity;
import android.graphics.Color;
import android.graphics.Typeface;
import android.os.Bundle;

public class MainActivity extends Activity {

 ViewPager viewPager;
 MyPagerAdapter myPagerAdapter;

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  viewPager = (ViewPager)findViewById(R.id.myviewpager);
  myPagerAdapter = new MyPagerAdapter();
  viewPager.setAdapter(myPagerAdapter);

 }
 
 private class MyPagerAdapter extends PagerAdapter{
  
  int NumberOfPages = 5;
  
  int[] res = { 
   android.R.drawable.ic_dialog_alert,
   android.R.drawable.ic_menu_camera,
   android.R.drawable.ic_menu_compass,
   android.R.drawable.ic_menu_directions,
   android.R.drawable.ic_menu_gallery};
  int[] backgroundcolor = { 
   0xFF101010,
   0xFF202020,
   0xFF303030,
   0xFF404040,
   0xFF505050};

  @Override
  public int getCount() {
   return NumberOfPages;
  }

  @Override
  public boolean isViewFromObject(View view, Object object) {
   return view == object;
  }

  @Override
  public Object instantiateItem(ViewGroup container, int position) {
   
      
      TextView textView = new TextView(MainActivity.this);
      textView.setTextColor(Color.WHITE);
      textView.setTextSize(30);
      textView.setTypeface(Typeface.DEFAULT_BOLD);
      textView.setText(String.valueOf(position));
      
      ImageView imageView = new ImageView(MainActivity.this);
      imageView.setImageResource(res[position]);
      LayoutParams imageParams = new LayoutParams(
        LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
      imageView.setLayoutParams(imageParams);
      
      LinearLayout layout = new LinearLayout(MainActivity.this);
      layout.setOrientation(LinearLayout.VERTICAL);
      LayoutParams layoutParams = new LayoutParams(
        LayoutParams.MATCH_PARENT,LayoutParams.MATCH_PARENT);
      layout.setBackgroundColor(backgroundcolor[position]);
      layout.setLayoutParams(layoutParams);
      layout.addView(textView);
      layout.addView(imageView);
      
      final int page = position;
      layout.setOnClickListener(new OnClickListener(){

    @Override
    public void onClick(View v) {
     Toast.makeText(MainActivity.this, 
      "Page " + page + " clicked", 
      Toast.LENGTH_LONG).show();
    }});
      
      container.addView(layout);
      return layout;
  }

  @Override
  public void destroyItem(ViewGroup container, int position, Object object) {
   container.removeView((LinearLayout)object);
  }

 }

}