Develop Reference

Android - How to create Excel sheet type layout?

I want to create an Excel type layout where there is infinite scroll vertically. There are fixed number of columns horizontally, but they should be scrollable.
I tried the below code
<HorizontalScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fillViewport="true">
<android.support.v7.widget.RecyclerView
android:id="#+id/table_data_recycler_view"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</HorizontalScrollView>
If I used the above code, then I am able to scroll vertically, but the columns are not scrollable.
Even giving fixed height in the xml for HorizontalScrollView and RecyclerView, the columns do not scroll.
Finally, I found an answer here, where it was advised to extend the RecyclerView and calculate the height dynamically.
public class MySmartRecyclerView extends RecyclerView {
public MySmartRecyclerView(Context context) {
super(context);
}
public MySmartRecyclerView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MySmartRecyclerView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
#Override
public boolean canScrollHorizontally(int direction) {
return false;
}
#Override
public int getMinimumWidth() {
return computedWidth;
}
#Override
protected void onMeasure(int widthSpec, int heightSpec) {
super.onMeasure(widthSpec, heightSpec);
setMeasuredDimension(computedWidth, getMeasuredHeight());
}
#Override
protected int getSuggestedMinimumWidth() {
return computedWidth;
}
}
So is this the only way, this can be achieved? Or is there any other way to achieve this. For RecyclerView inside ScrollView there is NestedScrollView, but no such thing for HorizontalScrollView.
Any pointers will be appreciated. TIA.

There is one alternate solution. You can use this library.

You want to do Ehhhh? Like the guy said, use library. You need and have normal easy to use solutions.
EDIT:
Okay my bad.
You want to infinite scroll vertically, not excel. I'm back from excel topic:
at onScroll listener, you should incriment endlessly the totalItemCount, you do it with double recurssion. From within the function of listener, you call to another listner whereas you call it by a function in the middle, which also increments that number before calling to the same listener again. You simply edit the view and re-attach the listener.

Using onInterceptTouchEvent in a class that extends Fragment

I have Fragment with a View which contains some clickable elements (ToggleButtons and a GridView).
I have set an onTouchListener on the View which I use to detect simple swipe gestures, this works perfectly well as long as the swipe doesn't start on any of the clickable items. I would like the swipe to work regardless of where it starts.
I understand that the ToggleButtons and GridView are probably consuming the touch event and in classes which extend ViewGroup I could override onInterceptTouchEvent or dispatchTouchEvent in subclasses of Activity.
Any ideas how I could deal with this situation when extending Fragment?
The closest I've found here is: Android adding onInterceptTouchEvent to a fragment Unfortunately there have been no replies to this question.
Thanks in anticipation.

Okay, got there in the end.
I create a subclass of RelativeLayout which is the root of my layout and then within this I override onInterceptTouchEvent.
public class RootLayout extends RelativeLayout {
public RootLayout(Context context) {
super(context);
}
public RootLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public RootLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
public boolean onInterceptTouchEvent(MotionEvent ev){
return true;
}
}
Then replace the RelativeLayout in my xml with the new subclass.
<com.walker.leigh.dipswitch2.RootLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/root_layout"
android:layout_width="match_parent"
android:layout_height="match_parent">
Thanks for your help :)

Automatically disable HorizontalScrollView when content small enough

I use a HorizontalScrollView to contain a bunch of dynamic TextView elements. They are dropped into a LinearLayout container that is the only child of the scroll view:
<HorizontalScrollView android:id="#+id/outline_container"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="none"
android:requiresFadingEdge="horizontal"
android:fadingEdgeLength="16dp">
<LinearLayout android:id="#+id/outline"
android:orientation="horizontal"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
</HorizontalScrollView>
This is to ensure that if (and only if) there's more text than the available width can show, the user can scroll horizontally through the texts.
BUT: in many, many cases, the texts are short enough to be shown on screen. The LinearLayout container with id outline thus fits completely within the HorizontalScrollView.
Problem is: horizontal swipe gestures are still caught but should not be, because the whole thing is within a ViewPager which itself would like to handle the horizontal swipes!
I am looking for a solution that enables this HorizontalScrollView's scrolling only if the room for the contents is too limited.

In order to prevent the HorizontalScrollView from scroll, you have to override the onTouchEvent method to return false. That led me to create my own HSV like so:
public class MyHorizontalScrollView extends HorizontalScrollView{
boolean tooSmall = true;
public MyHorizontalScrollView(Context context) {
super(context);
}
public MyHorizontalScrollView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public MyHorizontalScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public void setTooSmall(boolean tooSmall){
this.tooSmall = tooSmall;
}
#Override
public boolean onTouchEvent(MotionEvent ev) {
if(tooSmall)
return false;
else
return super.onTouchEvent(ev);
}
}
Then, after you replace your HSV with this custom view, you need monitor the size of your LinearLayout(R.id.outline) to see if it is smaller or larger than your HSV. Adding this snippet helped me achieve that goal.
ll = (LinearLayout) view.findViewById(R.id.outline);
hsv = (MyHorizontalScrollView) view.findViewById(R.id.outline_container);
ll.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
Log.d("widths", ll.getWidth() + " : " + hsv.getWidth());
hsv.setTooSmall(ll.getWidth() < hsv.getWidth());
}
});

Scrollup not working in StickyListviewHeader with SwipeRefreshLayout

I am using StickyHeaderListview in my project to display contents and for refreshing the list, I am using SwipeRefreshLayout.
The problem here is, when I try to scroll up the list, it starts refreshing the list and not allowing to view the previous items of list.
I want the behavior should be such as the list get refresh only when I've reached to the first item and I try to scroll up , not everytime when i scroll up the list.
Can anyone help on this?
P.s. For implementing SwipeRefreshLayout, I am refering this example

I faced the same problem when using StickyHeaderListview as a direct child of SwipeRefreshLayout. StickyHeaderListview is in fact a FrameLayout wrapping a ListView inside. As nitesh goel explained, this would lead to problems with canChildScrollUp(). Based on nitesh goel's example, this is a full version of CustomSwipeRefreshLayout that works well for me:
public class CustomSwipeRefreshLayout extends SwipeRefreshLayout {
/**
* A StickyListHeadersListView whose parent view is this SwipeRefreshLayout
*/
private StickyListHeadersListView mStickyListHeadersListView;
public CustomSwipeRefreshLayout(Context context) {
super(context);
}
public CustomSwipeRefreshLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void setStickyListHeadersListView(StickyListHeadersListView stickyListHeadersListView) {
mStickyListHeadersListView = stickyListHeadersListView;
}
#Override
public boolean canChildScrollUp() {
if (mStickyListHeadersListView != null) {
// In order to scroll a StickyListHeadersListView up:
// Firstly, the wrapped ListView must have at least one item
return (mStickyListHeadersListView.getListChildCount() > 0) &&
// And then, the first visible item must not be the first item
((mStickyListHeadersListView.getFirstVisiblePosition() > 0) ||
// If the first visible item is the first item,
// (we've reached the first item)
// make sure that its top must not cross over the padding top of the wrapped ListView
(mStickyListHeadersListView.getListChildAt(0).getTop() < 0));
// If the wrapped ListView is empty or,
// the first item is located below the padding top of the wrapped ListView,
// we can allow performing refreshing now
} else {
// Fall back to default implementation
return super.canChildScrollUp();
}
}
}

Ok I have got it working. If the SwipeRefreshLayout is the root of the layout and the ListView resides deep into the hierarchy (I had put the ListView inside a RelativeLayout along with the empty TextView) and not the direct child of the SwipeRefreshLayout, it won’t detect a swipe up on the list view properly.
You should create a custom class that extends SwipeRefreshLayout and override canChildScrollUp() method in SwipRefreshLayout
Here is a example :
public class CustomSwipeRefreshLayout extends SwipeRefreshLayout{
private AbsListView view;
public CustomSwipeRefreshLayout(Context context) {
super(context);
}
public CustomSwipeRefreshLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void setView(AbsListView view){
this.view=view;
}
#Override
public boolean canChildScrollUp() {
return view.getFirstVisiblePosition()!=0;
}
}

I have had a similar problem, the direct child should be an instance of ScrollView (or ListView). The SwipeRefreshLayout will only take in account the direct child's scroll and not the child's of that direct child. I managed to solve this by using two SwipeRefreshLayouts.
I posted the code on github.

Hi i think i made something for a generally use :
public class CustomSwipeRefreshLayout extends SwipeRefreshLayout {
private View v;
public CustomSwipeRefreshLayout(Context context) {
super(context);
}
public CustomSwipeRefreshLayout(Context context, AttributeSet attrs) {
super(context, attrs);
}
public void setView(View v) {
this.v = v;
}
#Override
public boolean canChildScrollUp() {
return this.v.canScrollVertically(-1);
}
}
With that solution, only set the view you want to scroll inside the SwipeRefreshLayout, after call canChildScrollUp(). like this :
this.refreshLayout.setView(aView);
this.refreshLayout.canChildScrollUp();
I don't test it a lot, but if i'm right it will work for every view at every place (direct child or not) in the SwipeRefreshLayout.
(for me it was SwipeRefreshLayout => RelativeLayout => SrcollView => linearLayout)

This is very simple solution:
list.setOnScrollListener(new AbsListView.OnScrollListener() {
#Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
#Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {
int topRowVerticalPosition = (list == null || list.getChildCount() == 0) ?
0 : list.getChildAt(0).getTop();
swipeRefreshLayout.setEnabled((topRowVerticalPosition >= 0));
}
});
So, if you're on the top of the listview you will be enabled to do refresh.

Disable All Touch Screen Interactions While Animation

I wish to disable all the touch screen interactions while an animation is being displayed.
I don't wish to use the setClickable() method on the buttons at the start or end of the animation because there are a large number of buttons. Any suggestions?

In your Activity, you can override onTouchEvent and always return true; to indicate you are handling the touch events.
You can find the documentation for that function there.
Edit Here is one way you can disable touch over the whole screen instead of handling every view one by one... First change your current layout like this:
<FrameLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
< .... put your current layout here ... />
<TouchBlackHoleView
android:id="#+id/black_hole"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</FrameLayout>
And then define your custom view with something like this:
public class TouchBlackHoleView extends View {
private boolean touch_disabled=true;
#Override
public boolean onTouchEvent(MotionEvent e) {
return touch_disabled;
}
public disable_touch(boolean b) {
touch_disabled=b;
}
}
Then, in the activity, you can disable the touch with
(TouchBlackHoleView) black_hole = findViewById(R.id.black_hole);
black_hole.disable_touch(true);
And enable it back with
black_hole.disable_touch(false);

Easy way to implement that is add transaperent layout over it (add it in your xml fill parent height and width).
In the animation start: transaparentlayout.setClickable(true);
In the animation end: transaparentlayout.setClickable(false);

answer to this issue
for (int i = 1; i < layout.getChildCount(); i++) {
TableRow row = (TableRow) layout.getChildAt(i);
row.setClickable(false);
selected all the rows of the table layout which had all the views and disabled them

Eventually I took as a basic answer of #Matthieu and make it work such way. I decide to publish my answer because it take me maybe 30 min to understood why I got error.
XML
<...your path to this view and in the end --> .TouchBlackHoleView
android:id="#+id/blackHole"
android:layout_width="match_parent"
android:layout_height="match_parent" />
Class
public class TouchBlackHoleView extends View {
private boolean touchDisable = false;
public TouchBlackHoleView(Context context) {
super(context);
}
public TouchBlackHoleView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public TouchBlackHoleView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#Override
public boolean onTouchEvent(MotionEvent event) {
return touchDisable;
}
public void disableTouch(boolean value){
touchDisable = value;
}
}
Using
blackHole = (TouchBlackHoleView) findViewById(R.id.blackHole);
blackHole.disableTouch(true);
Enjoy