This is my VerticalViewPager:
public class VerticalViewPager extends ViewPager {
public interface OnTouchListener {
void onTouchDown();
void onTouchUp();
void onTouchMove();
}
private OnTouchListener mListener;
public VerticalViewPager(Context context) {
super(context);
init();
}
public VerticalViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
// The majority of the magic happens here
setPageTransformer(true, new VerticalPageTransformer());
// The easiest way to get rid of the overscroll drawing that happens on the left and right
setOverScrollMode(OVER_SCROLL_NEVER);
}
public void setOnTouchListener(OnTouchListener listener) {
mListener = listener;
}
private class VerticalPageTransformer implements ViewPager.PageTransformer {
#Override
public void transformPage(View view, float position) {
if (position < -1) { // [-Infinity,-1)
// This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 1) { // [-1,1]
view.setAlpha(1);
// Counteract the default slide transition
view.setTranslationX(view.getWidth() * -position);
//set Y setNum to swipe in from top
float yPosition = position * view.getHeight();
view.setTranslationY(yPosition);
} else { // (1,+Infinity]
// This page is way off-screen to the right.
view.setAlpha(0);
}
}
}
/**
* Swaps the X and Y coordinates of your touch event.
*/
private MotionEvent swapXY(MotionEvent ev) {
float width = getWidth();
float height = getHeight();
float newX = (ev.getY() / height) * width;
float newY = (ev.getX() / width) * height;
ev.setLocation(newX, newY);
return ev;
}
#Override
public boolean onInterceptTouchEvent(MotionEvent ev){
boolean intercepted = super.onInterceptTouchEvent(swapXY(ev));
swapXY(ev); // return touch coordinates to original reference frame for any child views
return intercepted;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
switch (ev.getAction() & MotionEventCompat.ACTION_MASK) {
case MotionEvent.ACTION_DOWN:
mListener.onTouchDown();
break;
case MotionEvent.ACTION_UP:
mListener.onTouchUp();
break;
case MotionEvent.ACTION_MOVE:
mListener.onTouchMove();
break;
}
return super.onTouchEvent(swapXY(ev));
}
}
I put some fragments in this ViewPager. In the last fragment there is a ScrollView:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/white">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
...
<ScrollView
android:id="#+id/vertical_scrollview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="none">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:paddingBottom="#dimen/keyline_4">
....
</LinearLayout>
</ScrollView>
</LinearLayout>
</RelativeLayout>
In this last fragment I can scroll in this page normally. But if I want to slide to the previous page in the VerticalViewPager, I can't, nothing happens.
Thanks by advance guys!
Try using a NestedScrollView instead of the ScrollView.
Related
in my main activity i have a horizontal viewpager. Inside one of the fragment of the viewpager i have another vertical viewpager. Both works fine. But for the horizontal viewpager, i need to scroll from the edge of the screens. But i want it to be scrolled from anywhere in the screen.
my horizontal viewpager setup:
viewPager = (ViewPager) findViewById(R.id.viewpager);
adapterViewPager = new HorizontalViewPagerAdapter(getSupportFragmentManager());
viewPager.setAdapter(adapterViewPager);
viewPager.setCurrentItem(1);
horizontal viewpager adapter:
public class HorizontalViewPagerAdapter extends FragmentPagerAdapter {
private static int NUM_ITEMS = 3;
public HorizontalViewPagerAdapter(FragmentManager fm) {
super(fm);
}
#Override
public Fragment getItem(int position) {
switch (position) {
case 0:
return MoreFragment.newInstance("Fragment MoreFragment", "HA HA HA");
case 1:
return NewsFragment.newInstance("Fragment 1", "HA HA HA");
case 2:
return WebViewFragment.newInstance("Fragment Webview", "HA HA HA");
default:
return null;
}
}
#Override
public int getCount() {
return NUM_ITEMS;
}
#Override
public CharSequence getPageTitle(int position) {
return "Tab " + position;
}
}
in my news fragment i have another viewpager.
viewPager = view.findViewById(R.id.shortpager);
adapterViewPager = new VerticalPagerAdapter(getActivity().getSupportFragmentManager(), newsList);
viewPager.setAdapter(adapterViewPager);
My vertical viewpager class:
public class VerticalViewPager extends ViewPager {
public VerticalViewPager(Context context) {
super(context);
init();
}
public VerticalViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
// The majority of the magic happens here
setPageTransformer(true, new VerticalPageTransformer());
// The easiest way to get rid of the overscroll drawing that happens on the left and right
setOverScrollMode(OVER_SCROLL_NEVER);
}
/**
* Swaps the X and Y coordinates of your touch event.
*/
private MotionEvent swapXY(MotionEvent ev) {
float width = getWidth();
float height = getHeight();
float newX = (ev.getY() / height) * width;
float newY = (ev.getX() / width) * height;
ev.setLocation(newX, newY);
return ev;
}
#Override
public boolean onInterceptTouchEvent(MotionEvent ev){
boolean intercepted = super.onInterceptTouchEvent(swapXY(ev));
swapXY(ev); // return touch coordinates to original reference frame for any child views
return intercepted;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
return super.onTouchEvent(swapXY(ev));
}
private class VerticalPageTransformer implements ViewPager.PageTransformer {
private static final float MIN_SCALE = 0.75f;
#Override
public void transformPage(View view, float position) {
if (position <= -1) { // [-Infinity,-1)
// This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 0) { // [-1,0]
// Use the default slide transition when moving to the left/top page
view.setAlpha(1);
ViewCompat.setElevation(view, 1);
// Counteract the default slide transition
view.setTranslationX(view.getWidth() * -position);
view.setTranslationY(0);
//set Y position to swipe in from top
float scaleFactor = MIN_SCALE + (1 - MIN_SCALE) * (1 - Math.abs(position));
view.setScaleX(scaleFactor);
view.setScaleY(scaleFactor);
} else if (position <= 1) { // [0,1]
view.setAlpha(1);
ViewCompat.setElevation(view, 2);
// Counteract the default slide transition
view.setTranslationX(view.getWidth() * -position);
view.setTranslationY(position * view.getHeight());
// Scale the page down (between MIN_SCALE and 1)
view.setScaleX(1);
view.setScaleY(1);
} else { // (1,+Infinity]
// This page is way off-screen to the right.
view.setAlpha(0);
}
}
}
}
vertical viewpager adapter:
public class VerticalPagerAdapter extends FragmentPagerAdapter {
private static int NUM_ITEMS = 3;
private final ArrayList<News> newsList;
public VerticalPagerAdapter(FragmentManager fm, ArrayList<News> newsList) {
super(fm);
this.newsList = newsList;
}
#Override
public Fragment getItem(int position) {
return ShortFragment.newInstance("Fragment 1", "HA HA HA", newsList.get(position));
}
#Override
public int getCount() {
return this.newsList.size();
}
#Override
public CharSequence getPageTitle(int position) {
return "Tab " + position;
}
}
Vertical viewpager scrolls smoothly. Currently for horizontal viewpager, i have to scroll from the edge of the screens. But i need to make it scrolled like the vertical one from anywhere in the screen.
Issue with your code is your VerticalViewPager
If you notice the code,
#Override
public boolean onInterceptTouchEvent(MotionEvent ev){
boolean intercepted = super.onInterceptTouchEvent(swapXY(ev));
swapXY(ev); // return touch coordinates to original reference frame for any child views
return intercepted;
}
Step-1, Call super with swapped gesture.
Step-2, Perform actions on vertical view pager with current gesture.
And if you specifically see the comment, // return touch coordinates to original reference frame for any child views this clearly tells that gesture is first consumed by child.
So in your vertical view pager since you are swapping the gestures, it is consuming the Horizontal Gesture even before passing it to the parent. Thats why your horizontal view pager do not get the gesture.
If you are using Vertical View Pager with any conflicting gesture implementation like ScrollView, Lists, RecyclerView, ViewPager, etc. use the one as in the link below. It is deprecated but works with all Gesture Conflicting Views.
https://github.com/kaelaela/VerticalViewPager
I had this issue and I resolved it by wrapping the viewpager in a Scrollview
<ScrollView
android:id="#+id/nested_scroll"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.viewpager2.widget.ViewPager2
android:id="#+id/view_pager"
android:nestedScrollingEnabled="false"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</ScrollView>
I need to implement a viewpager that can do both horizontal and vertical paging. If the user switches the page vertically, a vertical PageTransformer should carry out the animation. Otherwise, the regular animation should happen.
I found a couple of libraries that attempt to solve this problem, but they run into problems when one of the views has a ScrollView inside.
If it's possible, I would like to implement it without third party libaries.
So far, all I have is the code for a vertical viewpager, but I can't figure out how to add the horizontal functionality as well:
public class VerticalViewPager extends ViewPager {
public VerticalViewPager(Context context) {
super(context);
init();
}
public VerticalViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
// The majority of the magic happens here
setPageTransformer(true, new VerticalPageTransformer());
// The easiest way to get rid of the overscroll drawing that happens on the left and right
setOverScrollMode(OVER_SCROLL_NEVER);
}
/**
* Swaps the X and Y coordinates of your touch event.
*/
private MotionEvent swapXY(MotionEvent ev) {
float width = getWidth();
float height = getHeight();
float newX = (ev.getY() / height) * width;
float newY = (ev.getX() / width) * height;
ev.setLocation(newX, newY);
return ev;
}
#Override
public boolean onInterceptTouchEvent(MotionEvent ev){
boolean intercepted = super.onInterceptTouchEvent(swapXY(ev));
swapXY(ev); // return touch coordinates to original reference frame for any child views
return intercepted;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
return super.onTouchEvent(swapXY(ev));
}
}
Just for reference, this is the my vertical PageTransformer:
public class VerticalPageTransformer implements ViewPager.PageTransformer {
#Override
public void transformPage(View view, float position) {
if (position < -1) { // [-Infinity,-1)
// This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 1) { // [-1,1]
view.setAlpha(1);
// Counteract the default slide transition
view.setTranslationX(view.getWidth() * -position);
//set Y position to swipe in from top
float yPosition = position * view.getHeight();
view.setTranslationY(yPosition);
} else { // (1,+Infinity]
// This page is way off-screen to the right.
view.setAlpha(0);
}
}
}
Any help would be appreciated
I have a custom vertical view pager that extends view pager. now i want to include pagerTabStrip. Now the thing is it can be align either on top or bottom. But for this customized viewpager i need vertical pagertabstrip as the pages/fragments scrolls verticall.
Here is the code of VerticalViewPager
public class VerticalViewPager extends ViewPager {
public VerticalViewPager(Context context) {
super(context);
init();
}
public VerticalViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
// The majority of the magic happens here
setPageTransformer(true, new VerticalPageTransformer());
// The easiest way to get rid of the overscroll drawing that happens on the left and right
setOverScrollMode(OVER_SCROLL_NEVER);
}
private class VerticalPageTransformer implements ViewPager.PageTransformer {
#Override
public void transformPage(View view, float position) {
if (position < -1) { // [-Infinity,-1)
// This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 1) { // [-1,1]
view.setAlpha(1);
// Counteract the default slide transition
view.setTranslationX(view.getWidth() * -position);
//set Y position to swipe in from top
float yPosition = position * view.getHeight();
view.setTranslationY(yPosition);
} else { // (1,+Infinity]
// This page is way off-screen to the right.
view.setAlpha(0);
}
}
}
/**
* Swaps the X and Y coordinates of your touch event.
*/
private MotionEvent swapXY(MotionEvent ev) {
float width = getWidth();
float height = getHeight();
float newX = (ev.getY() / height) * width;
float newY = (ev.getX() / width) * height;
ev.setLocation(newX, newY);
return ev;
}
#Override
public boolean onInterceptTouchEvent(MotionEvent ev){
boolean intercepted = super.onInterceptTouchEvent(swapXY(ev));
swapXY(ev); // return touch coordinates to original reference frame for any child views
return intercepted;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
return super.onTouchEvent(swapXY(ev));
}
}
The Xml for the VewPager is
<com.mypackage.customViews.VerticalViewPager
android:id="#+id/view_pager"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="20dp"
android:scrollIndicators="top"
>
<android.support.v4.view.PagerTabStrip
android:id="#+id/pager_title_strip"
android:layout_width="match_parent"
android:layout_height="wrap_content"
layout_gravity="right"
android:paddingBottom="#dimen/padding8"
android:paddingTop="#dimen/padding8"
android:textColor="#color/link_color" />
</com.TCYonline.android.BetterThink.customViews.VerticalViewPager>
Please help me out.
link check this news app, i want to develop like this.
i want swipe up/down side effect..
i tried this code,but not correctly swiping as i want.
in this code when i swipe up/down,only the text is changing not a layout.
public class ArticlesActivity extends Activity implements GestureDetector.OnGestureListener{
ImageView image,imageArticle;
TextView tv1,tv2,tv3;
private GestureDetector gd;
LinearLayout layout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_articles);
//Creating GestureDetector Object
gd = new GestureDetector(this, this);
}
#Override
public boolean onTouchEvent(MotionEvent event) {
// TODO Auto-generated method stub
//Registering TouchEvent with GestureDetector
return gd.onTouchEvent(event);
}
#Override
public void onBackPressed() {
// TODO Auto-generated method stub
//Destroying Activity
finish();
}
#Override
public boolean onDown(MotionEvent arg0) {
// TODO Auto-generated method stub
return false;
}
#Override
public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
// TODO Auto-generated method stub
//Defining Sensitivity
float sensitivity = 50;
//Swipe Up Check
if(e1.getY() - e2.getY() > sensitivity){
//Setting Image Resource to Up_Arrow on Swipe Up
tv1.setText("Some Text");
tv2.setText("Some Text");
tv3.setText("Some Text");
image.setImageResource(R.drawable.logo);
imageArticle.setImageResource(R.drawable.ic_launcher);
return true;
}
//Swipe Down Check
else if(e2.getY() - e1.getY() > sensitivity){
//Setting Image Resource to Down_Arrow on Swipe Down
tv1.setText("Some Text");
tv2.setText("Some Text");
tv3.setText("Some Text");
image.setImageResource(R.drawable.ic_launcher);
imageArticle.setImageResource(R.drawable.logo);
return true;
}
else{
//If some error occurrs, setting again to Default_Image (Actually it will never happen in this case)
image.setImageResource(R.drawable.logo);
return true;
}
}
#Override
public void onLongPress(MotionEvent arg0) {
// TODO Auto-generated method stub
}
#Override
public boolean onScroll(MotionEvent arg0, MotionEvent arg1, float arg2,
float arg3) {
// TODO Auto-generated method stub
return false;
}
#Override
public void onShowPress(MotionEvent arg0) {
// TODO Auto-generated method stub
}
#Override
public boolean onSingleTapUp(MotionEvent arg0) {
// TODO Auto-generated method stub
return false;
}
}
This will work like inshorts app
main.xml
<com.cardviewanimation.VerticalViewPager
android:id="#+id/verticleViewPager"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
content_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.CardView
android:id="#+id/card_view"
android:layout_gravity="center"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_margin="5dp"
card_view:cardCornerRadius="2dp"
card_view:contentPadding="10dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="300dp"
android:src="#drawable/background"
android:scaleType="fitXY"/>
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"/>
</LinearLayout>
</android.support.v7.widget.CardView>
</LinearLayout>
VerticleViewPagerActivity.java
public class VerticleViewPagerActivity extends AppCompatActivity {
VerticalViewPager verticalViewPager;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
verticalViewPager = (VerticalViewPager) findViewById(R.id.verticleViewPager);
verticalViewPager.setAdapter(new VerticlePagerAdapter(this));
}
}
VerticlePagerAdapter.java
public class VerticlePagerAdapter extends PagerAdapter {
String mResources[] = {"To start off lets understand what exactly Android CardView is? Its a new widget for Android, which can be used to display a card sort of a layout in android. As you may know Android material design is inspired from paper and ink concept. Mostly it displays views on top of each other, with shadows. In simple terms, Android CardView is such a view which has all material design properties, most importantly showing shadows according the elevation. The best part about this view is that it extends FrameLayout and it can be displayed on all the platforms of android since it’s available through the Support v7 library. Lets have a look at some of its properties:","To start off lets understand what exactly Android CardView is? Its a new widget for Android, which can be used to display a card sort of a layout in android. As you may know Android material design is inspired from paper and ink concept. Mostly it displays views on top of each other, with shadows. In simple terms, Android CardView is such a view which has all material design properties, most importantly showing shadows according the elevation. The best part about this view is that it extends FrameLayout and it can be displayed on all the platforms of android since it’s available through the Support v7 library. Lets have a look at some of its properties:"};
Context mContext;
LayoutInflater mLayoutInflater;
public VerticlePagerAdapter(Context context) {
mContext = context;
mLayoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
#Override
public int getCount() {
return mResources.length;
}
#Override
public boolean isViewFromObject(View view, Object object) {
return view == ((LinearLayout) object);
}
#Override
public Object instantiateItem(ViewGroup container, int position) {
View itemView = mLayoutInflater.inflate(R.layout.content_main, container, false);
TextView label = (TextView) itemView.findViewById(R.id.textView);
label.setText(mResources[position]);
container.addView(itemView);
return itemView;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((LinearLayout) object);
}
}
VerticalViewPager.java
public class VerticalViewPager extends ViewPager {
public VerticalViewPager(Context context) {
super(context);
init();
}
public VerticalViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
// The majority of the magic happens here
setPageTransformer(true, new VerticalPageTransformer());
// The easiest way to get rid of the overscroll drawing that happens on the left and right
setOverScrollMode(OVER_SCROLL_NEVER);
}
private class VerticalPageTransformer implements ViewPager.PageTransformer {
private static final float MIN_SCALE = 0.75f;
#Override
public void transformPage(View view, float position) {
if (position < -1) { // [-Infinity,-1)
// This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 0) { // [-1,0]
// Use the default slide transition when moving to the left page
view.setAlpha(1);
// Counteract the default slide transition
view.setTranslationX(view.getWidth() * -position);
//set Y position to swipe in from top
float yPosition = position * view.getHeight();
view.setTranslationY(yPosition);
view.setScaleX(1);
view.setScaleY(1);
} else if (position <= 1) { // [0,1]
view.setAlpha(1);
// Counteract the default slide transition
view.setTranslationX(view.getWidth() * -position);
// Scale the page down (between MIN_SCALE and 1)
float scaleFactor = MIN_SCALE
+ (1 - MIN_SCALE) * (1 - Math.abs(position));
view.setScaleX(scaleFactor);
view.setScaleY(scaleFactor);
} else { // (1,+Infinity]
// This page is way off-screen to the right.
view.setAlpha(0);
}
}
}
/**
* Swaps the X and Y coordinates of your touch event.
*/
private MotionEvent swapXY(MotionEvent ev) {
float width = getWidth();
float height = getHeight();
float newX = (ev.getY() / height) * width;
float newY = (ev.getX() / width) * height;
ev.setLocation(newX, newY);
return ev;
}
#Override
public boolean onInterceptTouchEvent(MotionEvent ev){
boolean intercepted = super.onInterceptTouchEvent(swapXY(ev));
swapXY(ev); // return touch coordinates to original reference frame for any child views
return intercepted;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
return super.onTouchEvent(swapXY(ev));
}
}
I got the solution for your problem as inshorts app using vertical view pager. I am sharing some code that can serve your purpose.
public class VerticalViewPager extends ViewPager {
public VerticalViewPager(Context context) {
this(context, null);
}
public VerticalViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
setPageTransformer(false, new DefaultTransformer());
}
private MotionEvent swapTouchEvent(MotionEvent event) {
float width = getWidth();
float height = getHeight();
float swappedX = (event.getY() / height) * width;
float swappedY = (event.getX() / width) * height;
event.setLocation(swappedX, swappedY);
return event;
}
#Override
public boolean onInterceptTouchEvent(MotionEvent event) {
boolean intercept = super.onInterceptTouchEvent(swapTouchEvent(event));
//If not intercept, touch event should not be swapped.
swapTouchEvent(event);
return intercept;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
return super.onTouchEvent(swapTouchEvent(ev));
}
}
As you can see the class above uses the DefaultTransformer class for transformation which implement ViewPager.PageTransformer for custom animation this class code is given below
public class DefaultTransformer implements ViewPager.PageTransformer {
#Override
public void transformPage(View view, float position) {
float alpha = 0;
if (0 <= position && position <= 1) {
alpha = 1 - position;
} else if (-1 < position && position < 0) {
alpha = position + 1;
}
System.out.println("alpha--" + alpha);
view.setAlpha(alpha);
System.out.println("position--" + position);
System.out.println("view.getWidth()--" + view.getWidth());
view.setTranslationX(view.getWidth() * -position);
float yPosition = position * view.getHeight();
System.out.println("yPosition---"+yPosition);
view.setTranslationY(yPosition);
}
}
and my activity code is like this
public class SwipeUpActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_swipe_layout);
setTitle("");
initViewPager();
}
private void initViewPager() {
VerticalViewPager viewPager = (VerticalViewPager) findViewById(R.id.vertical_viewpager);
//viewPager.setPageTransformer(false, new ZoomOutTransformer());
//viewPager.setPageTransformer(true, new StackTransformer());
String title = "ContentFragment";
viewPager.setAdapter(new ContentFragmentAdapter.Holder(getSupportFragmentManager())
.add(ContentFragment.newInstance(title, 1))
.add(ContentFragment.newInstance(title, 2))
.add(ContentFragment.newInstance(title, 3))
.add(ContentFragment.newInstance(title, 4))
.add(ContentFragment.newInstance(title, 5))
.set());
//If you setting other scroll mode, the scrolled fade is shown from either side of display.
viewPager.setOverScrollMode(View.OVER_SCROLL_NEVER);
}
The layout named activity_swipe_layout is like this
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:background="#A6000000"
android:layout_height="match_parent">
<gmaillogindemo.com.irk.transforms.VerticalViewPager
android:id="#+id/vertical_viewpager"
android:layout_width="match_parent"
android:layout_height="match_parent" />
and the result is looking like this:
after swipe up
I've tried to implement swiperefreshlayout in my code but it keeps refreshing the entire pager instead of just refreshing when i'm on the first Fragment i.e the 0th Fragment.
I tried setting refresh to false as shown, but the loader still appears, and doesn't reset when I go back to the 0th Fragment again.
On setting swiperefreshlayout.enable(false), I can't refresh it anywhere.
Can anyone suggest an alternative?
This is my XML file:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/parentLinearLayout"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/swipe_refresh_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ScrollView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:fillViewport="true">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<lbbdapp.littleblackbook.com.littleblackbook.Support.VerticalViewPager
android:id="#+id/verticalViewPager"
android:layout_width="fill_parent"
android:layout_height="wrap_content" />
</LinearLayout>
</ScrollView>
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>
And this is my activity:
public class FeedActivity extends ActionBarActivity {
PageAdapter mPageAdapter;
ProgressBar mProgressBar;
ProgressDialog prog;
ViewPager pager;
String article_id;
private float x1, x2;
SwipeRefreshLayout mSwipeRefreshLayout;
ArrayList<FragmentObject> mObjectsDataList;
ArrayList<ArticleObject> mArticleDataList=new ArrayList<ArticleObject>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.feed_layout);
mObjectsDataList = new ArrayList<FragmentObject>();
DataFetcherTask myTask = new DataFetcherTask();
myTask.execute();
mSwipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipe_refresh_layout);
mSwipeRefreshLayout.setColorScheme(android.R.color.holo_blue_bright,
android.R.color.holo_blue_dark,
android.R.color.holo_purple,
android.R.color.darker_gray);
pager=(ViewPager)findViewById(R.id.verticalViewPager);
mSwipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
#Override
public void onRefresh() {
if(pager.getCurrentItem()==0) {
Log.wtf("current item is 0", "0");
mSwipeRefreshLayout.setRefreshing(true);
Log.wtf("Swiping", "Refreshing");
(new Handler()).postDelayed(new Runnable() {
#Override
public void run() {
mSwipeRefreshLayout.setRefreshing(false);
DataFetcherTask myTask = new DataFetcherTask();
myTask.execute();
}
}, 3000);
}
else{
mSwipeRefreshLayout.setRefreshing(false);
}
}
});
}
This is my vertical ViewPager:
public class VerticalViewPager extends ViewPager {
public VerticalViewPager(Context context) {
super(context);
init();
}
public VerticalViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
private void init() {
// The majority of the magic happens here
setPageTransformer(true, new VerticalPageTransformer());
// The easiest way to get rid of the overscroll drawing that happens on the left and right
setOverScrollMode(OVER_SCROLL_NEVER);
}
private class VerticalPageTransformer implements ViewPager.PageTransformer {
#Override
public void transformPage(View view, float position) {
if (position < -1) { // [-Infinity,-1)
// This page is way off-screen to the left.
view.setAlpha(0);
} else if (position <= 1) { // [-1,1]
view.setAlpha(1);
// Counteract the default slide transition
view.setTranslationX(view.getWidth() * -position);
//set Y position to swipe in from top
float yPosition = position * view.getHeight();
view.setTranslationY(yPosition);
} else { // (1,+Infinity]
// This page is way off-screen to the right.
view.setAlpha(0);
}
}
}
/**
* Swaps the X and Y coordinates of your touch event.
*/
private MotionEvent swapXY(MotionEvent ev) {
float width = getWidth();
float height = getHeight();
float newX = (ev.getY() / height) * width;
float newY = (ev.getX() / width) * height;
ev.setLocation(newX, newY);
return ev;
}
#Override
public boolean onInterceptTouchEvent(MotionEvent ev){
boolean intercepted = super.onInterceptTouchEvent(swapXY(ev));
swapXY(ev); // return touch coordinates to original reference frame for any child views
return intercepted;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
return super.onTouchEvent(swapXY(ev));
}
}
Instead of extending SwipeRefesh over ViewGroup use it inside the each Fragment of ViewPager.
Once this is resolved now you need to check scroll down gesture of ViewPager and SwipeRefresh.
public class NEWSwipeRefresh extends SwipeRefreshLayout {
private View mTargetView;
public NEWSwipeRefresh(Context context) {
this(context, null);
}
public NEWSwipeRefresh(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void setTarget(View view) {
mTargetView = view;
}
#Override
public boolean canChildScrollUp() {
if (mTargetView instanceof YOURVIEW) {
final StaggeredGridView absListView = (YOURVIEW)mTargetView;
return absListView.getChildCount() > 0
&& (absListView.getFirstVisiblePosition() > 0 || absListView
.getChildAt(0).getTop() < absListView
.getPaddingTop());
} else {
return super.canChildScrollUp();
}
}
}
Normally swipe refresh returns -1 and it gives swipe gesture to it's parent now I have overridden it here for listview/gridview so that it can check for visible items, if it is on top then it will give swipe to parent or otherwise it will give it to children.
Well, I was trying to figure this out since few days and it's quite simple. Just put the SwipeRefreshLayout as the parent element of ViewPager and just disable the SwipeRefreshLayout on the particular fragment using OnPageChangeListener as follows:
// viewpager change listener
OnPageChangeListener viewPagerPageChangeListener = new OnPageChangeListener() {
#Override
public void onPageSelected(int position) {
//for the 0th pos disable SwipeRefreshLayout;
if(position != 0){
swipeRefreshLayout.setEnabled(false);
}else swipeRefreshLayout.setEnabled(true);
}
#Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
}
#Override
public void onPageScrollStateChanged(int arg0) {
}};