Monday, July 10, 2017

ViewPager with previous and next page boundaries

Video Demo:





Show the viewpager with the boundaries of previous and next page in android programmatically. In this example I am using viewpager with fragments to show the left and right boundaries.Download source code from here

android viewpager multiple pages on screen


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:background="#ffffff">

    <android.support.v4.view.ViewPager

        android:id="@+id/viewpager"
        android:layout_width="match_parent"
        android:layout_height="400dp"
        android:layout_centerInParent="true" />

</RelativeLayout>
MainActivity.java
package com.deepshikha.viewpager;

import android.content.Context;
import android.content.res.Configuration;
import android.os.Build;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.util.SparseArray;
import android.view.ViewGroup;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends FragmentActivity {

    ViewPager pager;
    MyPageAdapter obj_adapter;
    String str_device;

    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        init();


    }

    private void init() {
        pager = (ViewPager) findViewById(R.id.viewpager);
        differentDensityAndScreenSize(getApplicationContext());
        List<Fragment> fragments = getFragments();
        pager.setAdapter(obj_adapter);
        pager.setClipToPadding(false);


        if (str_device.equals("normal-hdpi")){
            pager.setPadding(160, 0, 160, 0);
        }else if (str_device.equals("normal-mdpi")){
            pager.setPadding(160, 0, 160, 0);
        }else if (str_device.equals("normal-xhdpi")){
            pager.setPadding(160, 0, 160, 0);
        }else if (str_device.equals("normal-xxhdpi")){
            pager.setPadding(180, 0, 180, 0);
        }else if (str_device.equals("normal-xxxhdpi")){
            pager.setPadding(180, 0, 180, 0);
        }else if (str_device.equals("normal-unknown")){
            pager.setPadding(160, 0, 160, 0);
        }else {

        }

        obj_adapter = new MyPageAdapter(getSupportFragmentManager(), fragments);
        pager.setPageTransformer(true, new ExpandingViewPagerTransformer());
        pager.setAdapter(obj_adapter);
    }

    class MyPageAdapter extends FragmentPagerAdapter {

        private List<Fragment> fragments;

        public MyPageAdapter(FragmentManager fm, List<Fragment> fragments) {

            super(fm);

            this.fragments = fragments;

        }

        @Override

        public Fragment getItem(int position) {

            return this.fragments.get(position);

        }

        @Override

        public int getCount() {

            return this.fragments.size();

        }

    }

    private List<Fragment> getFragments() {

        List<Fragment> fList = new ArrayList<Fragment>();

        fList.add(MyFragment.newInstance("Fragment 1",R.drawable.imags));
        fList.add(MyFragment.newInstance("Fragment 2",R.drawable.image1));
        fList.add(MyFragment.newInstance("Fragment 3",R.drawable.image2));
        fList.add(MyFragment.newInstance("Fragment 4",R.drawable.image3));
        fList.add(MyFragment.newInstance("Fragment 5",R.drawable.image4));

        return fList;

    }

    public int differentDensityAndScreenSize(Context context) {
        int value = 20;
        String str = "";
        if ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_SMALL) {
            switch (context.getResources().getDisplayMetrics().densityDpi) {
                case DisplayMetrics.DENSITY_LOW:
                    str = "small-ldpi";
                    // Log.e("small 1","small-ldpi");
                    value = 20;
                    break;
                case DisplayMetrics.DENSITY_MEDIUM:
                    str = "small-mdpi";
                    // Log.e("small 1","small-mdpi");
                    value = 20;
                    break;
                case DisplayMetrics.DENSITY_HIGH:
                    str = "small-hdpi";
                    // Log.e("small 1","small-hdpi");
                    value = 20;
                    break;
                case DisplayMetrics.DENSITY_XHIGH:
                    str = "small-xhdpi";
                    // Log.e("small 1","small-xhdpi");
                    value = 20;
                    break;
                case DisplayMetrics.DENSITY_XXHIGH:
                    str = "small-xxhdpi";
                    // Log.e("small 1","small-xxhdpi");
                    value = 20;
                    break;
                case DisplayMetrics.DENSITY_XXXHIGH:
                    str = "small-xxxhdpi";
                    //Log.e("small 1","small-xxxhdpi");
                    value = 20;
                    break;
                case DisplayMetrics.DENSITY_TV:
                    str = "small-tvdpi";
                    // Log.e("small 1","small-tvdpi");
                    value = 20;
                    break;
                default:
                    str = "small-unknown";
                    value = 20;
                    break;
            }

        } else if ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_NORMAL) {
            switch (context.getResources().getDisplayMetrics().densityDpi) {
                case DisplayMetrics.DENSITY_LOW:
                    str = "normal-ldpi";
                    // Log.e("normal-ldpi 1","normal-ldpi");
                    str_device = "normal-ldpi";
                    value = 82;
                    break;
                case DisplayMetrics.DENSITY_MEDIUM:
                    // Log.e("normal-mdpi 1","normal-mdpi");
                    str = "normal-mdpi";
                    value = 82;
                    str_device = "normal-mdpi";
                    break;
                case DisplayMetrics.DENSITY_HIGH:
                    // Log.e("normal-hdpi 1","normal-hdpi");
                    str = "normal-hdpi";
                    str_device = "normal-hdpi";
                    value = 82;
                    break;
                case DisplayMetrics.DENSITY_XHIGH:
                    //Log.e("normal-xhdpi 1","normal-xhdpi");
                    str = "normal-xhdpi";
                    str_device = "normal-xhdpi";
                    value = 90;
                    break;
                case DisplayMetrics.DENSITY_XXHIGH:
                    // Log.e("normal-xxhdpi 1","normal-xxhdpi");
                    str = "normal-xxhdpi";
                    str_device = "normal-xxhdpi";
                    value = 96;
                    break;
                case DisplayMetrics.DENSITY_XXXHIGH:
                    //Log.e("normal-xxxhdpi","normal-xxxhdpi");
                    str = "normal-xxxhdpi";
                    str_device = "normal-xxxhdpi";
                    value = 96;
                    break;
                case DisplayMetrics.DENSITY_TV:
                    //Log.e("DENSITY_TV 1","normal-mdpi");
                    str = "normal-tvdpi";
                    str_device = "normal-tvmdpi";
                    value = 96;
                    break;
                default:
                    // Log.e("normal-unknown","normal-unknown");
                    str = "normal-unknown";
                    str_device = "normal-unknown";
                    value = 82;
                    break;
            }
        } else if ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_LARGE) {
            switch (context.getResources().getDisplayMetrics().densityDpi) {
                case DisplayMetrics.DENSITY_LOW:
                    str = "large-ldpi";
                    // Log.e("large-ldpi 1","normal-ldpi");
                    value = 78;
                    break;
                case DisplayMetrics.DENSITY_MEDIUM:
                    str = "large-mdpi";
                    //Log.e("large-ldpi 1","normal-mdpi");
                    value = 78;
                    break;
                case DisplayMetrics.DENSITY_HIGH:
                    //Log.e("large-ldpi 1","normal-hdpi");
                    str = "large-hdpi";
                    value = 78;
                    break;
                case DisplayMetrics.DENSITY_XHIGH:
                    // Log.e("large-ldpi 1","normal-xhdpi");
                    str = "large-xhdpi";
                    value = 125;
                    break;
                case DisplayMetrics.DENSITY_XXHIGH:
                    //Log.e("large-ldpi 1","normal-xxhdpi");
                    str = "large-xxhdpi";
                    value = 125;
                    break;
                case DisplayMetrics.DENSITY_XXXHIGH:
                    // Log.e("large-ldpi 1","normal-xxxhdpi");
                    str = "large-xxxhdpi";
                    value = 125;
                    break;
                case DisplayMetrics.DENSITY_TV:
                    //Log.e("large-ldpi 1","normal-tvdpi");
                    str = "large-tvdpi";
                    value = 125;
                    break;
                default:
                    str = "large-unknown";
                    value = 78;
                    break;
            }

        } else if ((context.getResources().getConfiguration().screenLayout & Configuration.SCREENLAYOUT_SIZE_MASK) == Configuration.SCREENLAYOUT_SIZE_XLARGE) {
            switch (context.getResources().getDisplayMetrics().densityDpi) {
                case DisplayMetrics.DENSITY_LOW:
                    // Log.e("large-ldpi 1","normal-ldpi");
                    str = "xlarge-ldpi";
                    value = 125;
                    break;
                case DisplayMetrics.DENSITY_MEDIUM:
                    // Log.e("large-ldpi 1","normal-mdpi");
                    str = "xlarge-mdpi";
                    value = 125;
                    break;
                case DisplayMetrics.DENSITY_HIGH:
                    //Log.e("large-ldpi 1","normal-hdpi");
                    str = "xlarge-hdpi";
                    value = 125;
                    break;
                case DisplayMetrics.DENSITY_XHIGH:
                    // Log.e("large-ldpi 1","normal-hdpi");
                    str = "xlarge-xhdpi";
                    value = 125;
                    break;
                case DisplayMetrics.DENSITY_XXHIGH:
                    // Log.e("large-ldpi 1","normal-xxhdpi");
                    str = "xlarge-xxhdpi";
                    value = 125;
                    break;
                case DisplayMetrics.DENSITY_XXXHIGH:
                    // Log.e("large-ldpi 1","normal-xxxhdpi");
                    str = "xlarge-xxxhdpi";
                    value = 125;
                    break;
                case DisplayMetrics.DENSITY_TV:
                    //Log.e("large-ldpi 1","normal-tvdpi");
                    str = "xlarge-tvdpi";
                    value = 125;
                    break;
                default:
                    str = "xlarge-unknown";
                    value = 125;
                    break;
            }
        }

        return value;
    }
}

myfragment_layout.xml
<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:layout_width="250dp"
    android:layout_height="250dp"
    android:background="#EAEAEA"
    android:orientation="vertical">

    <TextView

        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"

        />

    <ImageView
        android:id="@+id/iv_image"
        android:scaleType="fitXY"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</RelativeLayout>
MyFragment.java
package com.deepshikha.viewpager;

import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.TextView;

/**
 * Created by deepshikha on 6/7/17.
 */
public class MyFragment extends Fragment {

    View view;
    ImageView iv_image;

    public static final String EXTRA_MESSAGE = "EXTRA_MESSAGE";
    public static final String IMAGE = "EXTRA_IMAGE";

    public static final MyFragment newInstance(String message, int int_image)

    {

        MyFragment f = new MyFragment();

        Bundle bdl = new Bundle(1);
        bdl.putString(EXTRA_MESSAGE, message);
        bdl.putInt(IMAGE, int_image);

        f.setArguments(bdl);

        return f;

    }

    @Override

    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {

        String message = getArguments().getString(EXTRA_MESSAGE);
        int int_image = getArguments().getInt(IMAGE);

        view = inflater.inflate(R.layout.myfragment_layout, container, false);

        TextView messageTextView = (TextView) view.findViewById(R.id.textView);

        ImageView iv_image = (ImageView) view.findViewById(R.id.iv_image);

        iv_image.setImageResource(int_image);
        messageTextView.setText(message);

        return view;

    }

}
ExpandingViewPagerTransformer.java:
package com.deepshikha.viewpager;

import android.os.Build;
import android.support.v4.view.ViewPager;
import android.view.View;

import android.os.Build;
import android.support.v4.view.ViewPager;
import android.view.View;

/**
 * Created by Qs on 16/5/30.
 */
public class ExpandingViewPagerTransformer implements ViewPager.PageTransformer {

    public static final float MAX_SCALE = 1.0f;
    public static final float MIN_SCALE = 0.8f;

    @Override
    public void transformPage(View page, float position) {

        position = position < -1 ? -1 : position;
        position = position > 1 ? 1 : position;

        float tempScale = position < 0 ? 1 + position : 1 - position;

        float slope = (MAX_SCALE - MIN_SCALE) / 1;
        float scaleValue = MIN_SCALE + tempScale * slope;
        page.setScaleX(scaleValue);
        page.setScaleY(scaleValue);
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT) {
            page.getParent().requestLayout();
        }
    }
}


3 comments:

  1. How to use viewpager for all images on SD card ?

    ReplyDelete
  2. Hello,

    First of all get the list of gallery images. Then pass that list in viewpager adapter. Then pass the instance of bundle in your fragment and change the images run time.

    Kind Regards,
    Deepshikha Puri

    ReplyDelete