i had a pageView, i use a code from dave to have some views on the same screen, like gallery widget, but the problem its seems its kind slow, not sure how to modify the ontouch event, what can i do to make fast scrollig i had this PageScroll code
public class PagerContainer extends FrameLayout implements ViewPager.OnPageChangeListener {
private ViewPager mPager;
boolean mNeedsRedraw = false;
public PagerContainer(Context context) {
super(context);
init();
}
public PagerContainer(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public PagerContainer(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
//Disable clipping of children so non-selected pages are visible
setClipChildren(false);
//Child clipping doesn't work with hardware acceleration in Android 3.x/4.x
//You need to set this value here if using hardware acceleration in an
// application targeted at these releases.
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
#Override
protected void onFinishInflate() {
try {
mPager = (ViewPager) getChildAt(0);
mPager.setOnPageChangeListener(this);
} catch (Exception e) {
throw new IllegalStateException("The root child of PagerContainer must be a ViewPager");
}
}
public ViewPager getViewPager() {
return mPager;
}
private Point mCenter = new Point();
private Point mInitialTouch = new Point();
#Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
mCenter.x = w / 2;
mCenter.y = h / 2;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
//We capture any touches not already handled by the ViewPager
// to implement scrolling from a touch outside the pager bounds.
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mInitialTouch.x = (int)ev.getX();
mInitialTouch.y = (int)ev.getY();
default:
ev.offsetLocation(mCenter.x - mInitialTouch.x, mCenter.y - mInitialTouch.y);
break;
}
return mPager.dispatchTouchEvent(ev);
}
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
//Force the container to redraw on scrolling.
//Without this the outer pages render initially and then stay static
if (mNeedsRedraw) invalidate();
}
#Override
public void onPageSelected(int position) { }
#Override
public void onPageScrollStateChanged(int state) {
mNeedsRedraw = (state != ViewPager.SCROLL_STATE_IDLE);
}
}
and this its the web where i take the code:
PageView code and this is the image of what i get since Gallery its depreacted this should be used, and gallery throws me outofmemory exception because im using images (i tried asyntask and a lot of things) Thanks
Related
I have a problem about the topic and now my situation is i have a viewpager inside scrollview and these inside emilsjolander FlipView, the structure look like:
<FlipView>
<ScrollView>
<ViewPager>
</ViewPager>
</ScrollView>
</FlipView>
And Because some issue of viewpager cannot detect touch so i just implement the custom Viewpager.
after i implemented the custom Viewpager, the touch issue is fixed but the viewpager has a problem about the animation.
when i swipe the viewpager, sometimes it work perfect but sometimes the viewpager just change the item without animation and it seem the first item change to Sec Item must cause this case. So i just put some log into startScroll method of ScrollerCustomDuration class and i found that when the viewpager change without animation, the startScroll method of ScrollerCustomDuration is not call.
So sorry for my poor english and thank you for all help, please let me know if u need me to provide more detail for this problem.
CustomViewPager Class:
public class CustomViewPager extends ViewPager {
private ScrollerCustomDuration mScroller = null;
public CustomViewPager(Context context) {
super(context);
postInitViewPager();
}
public CustomViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
postInitViewPager();
}
#Override
public boolean onInterceptTouchEvent(MotionEvent event) {
Log.e("onInterceptTouchEvent",event.toString());
switch (event.getAction()) {
case MotionEvent.ACTION_MOVE:
this.getParent().requestDisallowInterceptTouchEvent(true);
break;
case MotionEvent.ACTION_UP:
case MotionEvent.ACTION_CANCEL:
this.getParent().requestDisallowInterceptTouchEvent(false);
break;
}
return super.onInterceptTouchEvent(event);
}
private void postInitViewPager() {
try {
Class<?> viewpager = ViewPager.class;
Field scroller = viewpager.getDeclaredField("mScroller");
scroller.setAccessible(true);
Field interpolator = viewpager.getDeclaredField("sInterpolator");
interpolator.setAccessible(true);
mScroller = new ScrollerCustomDuration(getContext(),
(Interpolator) interpolator.get(null));
scroller.set(this, mScroller);
} catch (Exception e) {
Log.e("MyPager", e.getMessage());
}
}
public void setScrollDurationFactor(double scrollFactor) {
mScroller.setScrollDurationFactor(scrollFactor);
}}
ScrollerCustomDuration Class :
public class ScrollerCustomDuration extends Scroller {
private double mScrollFactor = 1;
public ScrollerCustomDuration(Context context) {
super(context);
}
public ScrollerCustomDuration(Context context, Interpolator interpolator) {
super(context, interpolator);
}
#SuppressLint("NewApi")
public ScrollerCustomDuration(Context context, Interpolator interpolator, boolean flywheel) {
super(context, interpolator, flywheel);
}
/**
* Set the factor by which the duration will change
*/
public void setScrollDurationFactor(double scrollFactor) {
mScrollFactor = scrollFactor;
}
#Override
public void startScroll(int startX, int startY, int dx, int dy, int duration) {
Log.e("##### FIX flash issue",""+startX);
Log.e("##### FIX flash issue",""+startY);
Log.e("##### FIX flash issue",""+dx);
Log.e("##### FIX flash issue",""+dy);
Log.e("##### FIX flash issue",""+duration);
super.startScroll(startX, startY, dx, dy, (int) (duration * mScrollFactor));
}
}
i just fixed the problem.
it seem the problem is not about ontouch.
i just refresh the flipview when flipview flip
the below code fixed my problem
fv.setOnFlipListener(new FlipView.OnFlipListener() {
#Override
public void onFlippedToPage(FlipView v, int position, long id) {
((BaseAdapter)fv.getAdapter()).notifyDataSetChanged();
}
});
I need to create the following layout to my viewpager:
I'm using PageContainer:
public class PagerContainer extends FrameLayout implements ViewPager.OnPageChangeListener{
private ViewPager mPager;
boolean mNeedsRedraw = false;
public PagerContainer(Context context)
{
super(context);
init();
}
public PagerContainer(Context context, AttributeSet attrs)
{
super(context, attrs);
init();
}
public PagerContainer(Context context, AttributeSet attrs, int defStyle)
{
super(context, attrs, defStyle);
init();
}
private void init()
{
// Disable clipping of children so non-selected pages are visible
setClipChildren(false);
// Child clipping doesn't work with hardware acceleration in Android
// 3.x/4.x
// You need to set this value here if using hardware acceleration in an
// application targeted at these releases.
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
#Override
protected void onFinishInflate()
{
try
{
mPager = (ViewPager) getChildAt(0);
mPager.setOnPageChangeListener(this);
} catch (Exception e)
{
throw new IllegalStateException("The root child of PagerContainer must be a ViewPager");
}
}
public ViewPager getViewPager()
{
return mPager;
}
private Point mCenter = new Point();
private Point mInitialTouch = new Point();
#Override
protected void onSizeChanged(int w, int h, int oldw, int oldh)
{
mCenter.x = w / 2;
mCenter.y = h / 2;
}
#Override
public boolean onTouchEvent(MotionEvent ev)
{
// We capture any touches not already handled by the ViewPager
// to implement scrolling from a touch outside the pager bounds.
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mInitialTouch.x = (int) ev.getX();
mInitialTouch.y = (int) ev.getY();
default:
ev.offsetLocation(mCenter.x - mInitialTouch.x, mCenter.y - mInitialTouch.y);
break;
}
return mPager.dispatchTouchEvent(ev);
}
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels)
{
// Force the container to redraw on scrolling.
// Without this the outer pages render initially and then stay static
if (mNeedsRedraw)
invalidate();
}
#Override
public void onPageSelected(int position)
{}
#Override
public void onPageScrollStateChanged(int state)
{
mNeedsRedraw = (state != ViewPager.SCROLL_STATE_IDLE);
}
`
And seting like this:
PagerContainer mContainer = (PagerContainer) mainView.findViewById(R.id.pagerContainer);
pager = mContainer.getViewPager();
pager.setOffscreenPageLimit(pagerAdapter.getCount());
pager.setPageMargin(getPx(20));
pager.setClipChildren(false);
But the side pages has the same size of the active page.
I've tried to use pager.setPageMargin but only sets margim between pages.
Can someone help me?
you need a PageTransfomer for that the changes the scale of the page on the left and on the right of the central one. When you implement the interface you'll be forced to implement the
public void transformPage (View page, float position) {
}
page is the current ViewPager's page, while float position is the position of page relative to the current center position of the pager. What you probably want is to change the scaleX and scaleY of page, when position is grater then 1 or less then -1. E.g.
public void transformPage (View page, float position) {
if (position > 1 || position < -1) {
ViewCompat.scaleX(page, 0.75f * paget.getWidth());
ViewCompat.scaleY(page, 0.75f * paget.getHeight());
} else if (position == 0) {
ViewCompat.scaleX(page, 1f);
ViewCompat.scaleY(page, 1f);
}
}
I have not the possibility to try it out so, please check for typo/cast.
I am using ViewPager with FragmentStatePageAdapter to show a number of views where user can go through. With current implementation only one page is changed at any single swipe. Instead I want to flip through multiple views based on user swipe. If swipe is long/fast i need to flip through multiple views and vice versa.
here is my current code
public class MyAdapter extends FragmentStatePagerAdapter
{
public MyAdapter(FragmentManager fragmentManager) {
super(fragmentManager);
}
#Override
public int getCount() {
return 10;
}
#Override
public Fragment getItem(int position) {
return ItemFragment.init(position);
}
}
PageContainer class
public class PagerContainer extends FrameLayout implements ViewPager.OnPageChangeListener {
private ViewPager mPager;
boolean mNeedsRedraw = false;
public PagerContainer(Context context) {
super(context);
init();
}
public PagerContainer(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public PagerContainer(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
//Disable clipping of children so non-selected pages are visible
setClipChildren(false);
//Child clipping doesn't work with hardware acceleration in Android 3.x/4.x
//You need to set this value here if using hardware acceleration in an
// application targeted at these releases.
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
#Override
protected void onFinishInflate() {
try {
mPager = (ViewPager) getChildAt(0);
mPager.setOnPageChangeListener(this);
} catch (Exception e) {
throw new IllegalStateException("The root child of PagerContainer must be a ViewPager");
}
}
public ViewPager getViewPager() {
return mPager;
}
private Point mCenter = new Point();
private Point mInitialTouch = new Point();
#Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
mCenter.x = w / 2;
mCenter.y = h / 2;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
//We capture any touches not already handled by the ViewPager
// to implement scrolling from a touch outside the pager bounds.
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mInitialTouch.x = (int)ev.getX();
mInitialTouch.y = (int)ev.getY();
default:
ev.offsetLocation(mCenter.x - mInitialTouch.x, mCenter.y - mInitialTouch.y);
break;
}
return mPager.dispatchTouchEvent(ev);
}
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
//Force the container to redraw on scrolling.
//Without this the outer pages render initially and then stay static
if (mNeedsRedraw) invalidate();
}
#Override
public void onPageSelected(int position) { }
#Override
public void onPageScrollStateChanged(int state) {
mNeedsRedraw = (state != ViewPager.SCROLL_STATE_IDLE);
}
}
How can I do this in android?
Thanks
You can change the view by calling:
ViewPager.setCurrentItem(int index)
ViewPager.setCurrentItem(int index, bool animation)
You must handle the sliding commands yourself, but on a certain slide you cloud call setCurrentItem of the ViewPager. The setCurrentItem method also allows you to enable or disable animations.
I have developed a kind of rolling mechanism for choosing staff in the application. It's Custom View Pager that allows to present more then one item on screen at each time (3 in my case) and surrounded with shadow from both sides.
Here is how it should look and works like this on devices like the Nexus 5, Nexus 4, Galaxy S3:
But on some devices like (Sony Xperia, and different kinds of Motorola) the rendering looks bad, here is the result:
Regarding the code I refereed to this blog post by #Commonsware:
http://commonsware.com/blog/2012/08/20/multiple-view-viewpager-options.html
And the third option there which code you could find here.
Here is my relevant code:
PagerContainer:
public class PagerContainer extends FrameLayout implements ViewPager.OnPageChangeListener {
private ViewPager mPager;
boolean mNeedsRedraw = false;
public PagerContainer(Context context) {
super(context);
init();
}
public PagerContainer(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public PagerContainer(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
//Disable clipping of children so non-selected pages are visible
setClipChildren(false);
//Child clipping doesn't work with hardware acceleration in Android 3.x/4.x
//You need to set this value here if using hardware acceleration in an
// application targeted at these releases.
if (Build.VERSION.SDK_INT >= 11 && Build.VERSION.SDK_INT < 19)
{
setLayerType(View.LAYER_TYPE_SOFTWARE, null);
}
}
#Override
protected void onFinishInflate() {
try {
mPager = (ViewPager) getChildAt(0);
mPager.setOnPageChangeListener(this);
} catch (Exception e) {
throw new IllegalStateException("The root child of PagerContainer must be a ViewPager");
}
}
public ViewPager getViewPager() {
return mPager;
}
private Point mCenter = new Point();
private Point mInitialTouch = new Point();
#Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
mCenter.x = w / 2;
mCenter.y = h / 2;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
//We capture any touches not already handled by the ViewPager
// to implement scrolling from a touch outside the pager bounds.
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mInitialTouch.x = (int)ev.getX();
mInitialTouch.y = (int)ev.getY();
default:
ev.offsetLocation(mCenter.x - mInitialTouch.x, mCenter.y - mInitialTouch.y);
break;
}
return mPager.dispatchTouchEvent(ev);
}
#Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
//Force the container to redraw on scrolling.
//Without this the outer pages render initially and then stay static
if (mNeedsRedraw) invalidate();
}
#Override
public void onPageSelected(int position) {
invalidate();
}
#Override
public void onPageScrollStateChanged(int state) {
mNeedsRedraw = (state != ViewPager.SCROLL_STATE_IDLE);
}
}
Init part:
//Size View Pager:
//========================================
pagerSize = mContainerSize.getViewPager();
adapter = new MySizePagerAdapter();
pagerSize.setAdapter(adapter);
//Necessary or the pager will only have one extra page to show make this at least however many pages you can see
pagerSize.setOffscreenPageLimit(adapter.getCount());
//A little space between pages
pagerSize.setPageMargin(15);
//If hardware acceleration is enabled, you should also remove clipping on the pager for its children.
pagerSize.setClipChildren(false);
More research brought me to understand that this problem has something to do with the Hardware acceleration or the lack of it in some devices. But disabling it via code didn't helped me either.
I would try setting the layerType of the ViewPager and it's children to software render, instead of the parent frame layout.
You also might want to check out this blog post: http://udinic.wordpress.com/2013/09/16/viewpager-and-hardware-acceleration/
I have ended up using another implementation of a ViewPager that gave me the same result but the rendering problem was no where to be seen there, this is the code:
private class MyTypePagerAdapter extends PagerAdapter {
#Override
public Object instantiateItem(ViewGroup container, int position) {
TextView view = new TextView(getActivity());
view.setText(mTempBeverageList.get(position).getName().toUpperCase());
if (!wasTypeChanged && (!isLocaleHebrew && position == 1))
{
view.setTypeface(null, Typeface.BOLD);
view.setTextSize(19);
}
else
{
view.setTextSize(16);
}
view.setSingleLine();
view.setGravity(Gravity.CENTER);
view.setTextColor(getResources().getColor(R.color.cups_black));
view.setBackgroundColor(getResources().getColor(R.color.cups_cyan));
container.addView(view);
return view;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View)object);
}
#Override
public int getCount() {
return mTempBeverageList.size();
}
#Override
public float getPageWidth(int position) {
return (0.33333f);
}
#Override
public boolean isViewFromObject(View view, Object object) {
return (view == object);
}
}
And the initialization part:
pagerType= (ViewPager) view.findViewById(R.id.pagerType);
pagerType.setAdapter(new MyTypePagerAdapter());
pagerType.setOffscreenPageLimit(6);
I am trying to show horizontal scroll view with images to scroll in two directions.Previously for this i used Gallery View but galleryview is deprected ,i am using horizontal scroll view instead of gallery view but horizontal scroll view is different with gallery view.
Now i have to do two implementation
1) Scrolling in two directions continuously.
2) Center lock feature as same as gallery.
My screen looks like
you can use viewpager,
try this code and modify it as your need .
note : this not my code already found it on the net belong to:
( Dave Smith,#devunwired Date: 8/17/12 PagerActivity).
MainActivity:
public class MainActivity extends Activity{
PagerContainer mContainer;
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mContainer = (PagerContainer) findViewById(R.id.pager_container);
ViewPager pager = mContainer.getViewPager();
PagerAdapter adapter = new MyPagerAdapter();
pager.setAdapter(adapter);
// Necessary or the pager will only have one extra page to show
// make this at least however many pages you can see
pager.setOffscreenPageLimit(adapter.getCount());
// A little space between pages
pager.setPageMargin(15);}
// Nothing special about this adapter, just throwing up colored views for
// demo
private class MyPagerAdapter extends PagerAdapter{
#Override
public Object instantiateItem(ViewGroup container, int position){
TextView view = new TextView(MainActivity.this);
view.setText("Item " + position);
view.setGravity(Gravity.CENTER);
view.setBackgroundColor(Color.argb(255, position * 50,
position * 10, position * 50));
container.addView(view);
return view;
}
#Override
public void destroyItem(ViewGroup container, int position, Object object)
{
container.removeView((View) object);}
#Override
public int getCount(){
return 5;
}
#Override
public boolean isViewFromObject(View view, Object object)
{
return (view == object);
}}}
PagerContainer:
public class PagerContainer extends FrameLayout implements
ViewPager.OnPageChangeListener {
private ViewPager mPager;
boolean mNeedsRedraw = false;
public PagerContainer(Context context) {
super(context);
init();
}
public PagerContainer(Context context, AttributeSet attrs) {
super(context, attrs);
init();
}
public PagerContainer(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
init();
}
private void init() {
setClipChildren(false);
}
#Override
protected void onFinishInflate() {
try {
mPager = (ViewPager) getChildAt(0);
mPager.setOnPageChangeListener(this);
} catch (Exception e) {
throw new IllegalStateException("The root child of PagerContainer must be a
ViewPager");
}
}
public ViewPager getViewPager() {
return mPager;
}
private Point mCenter = new Point();
private Point mInitialTouch = new Point();
#Override
protected void onSizeChanged(int w, int h, int oldw, int oldh) {
mCenter.x = w / 2;
mCenter.y = h / 2;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
//We capture any touches not already handled by the ViewPager
// to implement scrolling from a touch outside the pager bounds.
switch (ev.getAction()) {
case MotionEvent.ACTION_DOWN:
mInitialTouch.x = (int)ev.getX();
mInitialTouch.y = (int)ev.getY();
default:
ev.offsetLocation(mCenter.x - mInitialTouch.x, mCenter.y -
mInitialTouch.y);
break;
}
return mPager.dispatchTouchEvent(ev);
}
public void onPageScrolled(int position, float positionOffset, int
positionOffsetPixels) {
//Force the container to redraw on scrolling.
//Without this the outer pages render initially and then stay static
if (mNeedsRedraw) invalidate();
}
public void onPageSelected(int position) { }
public void onPageScrollStateChanged(int state) {
mNeedsRedraw = (state != ViewPager.SCROLL_STATE_IDLE);
}
}
activity_main.xml:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<com.example.testviewpager.PagerContainer
android:id="#+id/pager_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#CCC" >
<android.support.v4.view.ViewPager
android:layout_width="150dp"
android:layout_height="100dp"
android:layout_gravity="center_horizontal" />
</com.example.testviewpager.PagerContainer>
</RelativeLayout>
hope help you.