ViewPager with previous and next page boundaries
AndroidAndroid ViewpagerViewflipperViewanimatorAndroid Problem Overview
I'm designing a view with multiple pages. I want edges of previous and next pages to be show like below and implement a 2 finger swipe to switch between pages.
I tried using ViewPager with negative page margin as suggested here but that only shows one of the edges on the screen, not both simultaneously.
Alternatively, is there any way i can position part of my view outside screen and then animate it giving it a ViewPager type effect.
How should I go about it ? Thanks !
Android Solutions
Solution 1 - Android
I have a similar solution:
On the viewpager set left and right padding, e.g. 20dp. Do also set the page margin on the viewpager, e.g. half of the pager padding. And do not forget to disable clip padding.
tilePager.setPadding(defaultGap, 0, defaultGap, 0);
tilePager.setClipToPadding(false);
tilePager.setPageMargin(halfGap);
Solution 2 - Android
Quoting myself from a blog post on this subject:
> The third approach comes from Dave Smith, co-author of the well-regarded book Android Recipes. He went in a very different direction, using a custom container that disabled children clipping to show more than one page at a time.
>
> His published sample code shows the whole thing in action. His container (com.example.pagercontainer.PagerContainer) wraps the ViewPager and calls setClipChildren(false); on itself, so even though the ViewPager is focused on one selected page, other pages that have coordinates beyond the ViewPager bounds are still visible, so long as they fit within the PagerContainer. By sizing the ViewPager to be smaller than the PagerContainer, the ViewPager can size its pages to that size, leaving room for other pages to be seen. PagerContainer, though, needs to help out a bit with touch events, as ViewPager will only handle swipe events on its own visible bounds, ignoring any pages visible to the sides.
Solution 3 - Android
-
Set left and right padding for whole item view. Example xml (page_item.xml):
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:paddingLeft="20dp" android:paddingRight="20dp"/> <TextView android:id="@+id/text1" android:text="Large Text" android:textAppearance="?android:attr/textAppearanceLarge" /> </LinearLayout> -
Then set negative page margin for
PageViewequal to 2*(previous view padding)int margin = (int)TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 20*2, getResources().getDisplayMetrics()); mViewPager.setPageMargin(-margin); -
Optional. Set zero left padding for first item and zero right padding to last item to hide empty edges. You may do this in the
PageAdapterorPagefragment class.
Solution 4 - Android
To show preview of left and right pages set the following two values
viewpager.setClipToPadding(false)
viewpager.setPadding(left,0,right,0)
If you need space between two pages in the viewpager then add viewpager.setPageMargin(int)
Solution 5 - Android
if someone still looking for solution, I had customized the ViewPage to achieve it without using negative margin, find a sample project here https://github.com/44kksharma/Android-ViewPager-Carousel-UI
it should work in most cases but you can still define page margin with
mPager.setPageMargin(margin in pixel);
https://imgflip.com/gif/2557e5"><img src="https://i.imgflip.com/2557e5.gif" title="made at imgflip.com"/>
Solution 6 - Android
Download the source code from here(ViewPager with previous and next page boundaries)
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;
}
}
Solution 7 - Android
Sometime ago I needed such feature and prepared a tiny library which uses RecyclerView with PagerSnapHelper (added in version 25.1.0 of the v7 support library) instead of classic ViewPager:
MetalRecyclerPagerView - you can find all the code along with examples there.
Mainly it consists of a single class file: MetalRecyclerViewPager.java (and two xmls: attrs.xml and ids.xml).
Hope it helps somebody :)
Solution 8 - Android
Carousel ViewPager fragment
ViewPager viewPager = findViewById(R.id.viewPager);
TabPagerAdapter tabPagerAdapter = new TabPagerAdapter(this,getSupportFragmentManager());
viewPager.setAdapter(tabPagerAdapter);
// Disable clip to padding
viewPager.setClipToPadding(false);
// set padding manually, the more you set the padding the more you see of prev & next page
viewPager.setPadding(40, 0, 40, 0);
// sets a margin b/w individual pages to ensure that there is a gap b/w them
viewPager.setPageMargin(20);
