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• Changing size of content in HorizontalScrollView when phone is rotated by overriding onConfiguration

  - by Emil Arfvidsson

  Hello I have a problem with resizing content in a HorizontalScrollView when the phone is rotated. I'm overriding onConfigurationChanged in my activity containing the HorizontalScrollView, since I want to handle the resizing myself. However, I'm having great problem finding where i should put the resizing of the content. The HorizontalScrollView it self has FILL_PARENT as width and a fixed height. The idea is that it should always fill the screen width-wise, while having several cells of content, each as wide as the HorizontalScrollView itself. The content in my HorizontalScrollView consists of one LinearLayout (let's call it wrapperLayout) with several LinearLayouts inside it. When the phone rotates I simply want to change the width of all the LinearLayouts inside the wrapperLayout. This is easy to do and works great when I test the resizing code by putting it in onInterceptTouchEvent(MotionEvent ev), that is the views are resized just as they are supposed to when I touch the HorizontalScrollView. The difficulty appears when I try to find a good spot to execute resizing code, so that the resizing happens automatically when the phone is rotated. I have tried all possible combinations of requestLayout, onSizeChanged, onLayout, onConfigurationChanged and a few others and varying their calls to super (if any) before and after the resizing code. I can not make this work (the views are not resized even though the resize code is executed) and it is really frustrating. I've done a lot of logging to make sure the HorizonalScrollView really has changed width before calling my resize code but to no avail. Does anyone have any clue as to what is going on? What methods are called and in what order when I handle the onConfigurationChanged by myself like this? Thanks in advance

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• Android: Autoscrolling HorizontalScrollView

  - by DroidIn.net

  I'm using the following code to simulate tabs and since there are more tabs that width can accommodate user can scroll left or right to make a tab button visible. It all works, however I also provide user with ability to fling between tabs by swiping finger left or right on the tab contents. Again - it works. But when I fling to the rightmost tab its corresponding button is barely visible. I want to autoscroll table inside the HorizontalScrollView so the selected tab button will be visible but when I execute HorizontalScrollView.smoothScrollTo(300, 0) nothing happens. It doen't matter how high I set first x parameter nothing will ever move (yes I do have an algorithm to calculate exact position). Here's XML code for scrolling tab buttons <HorizontalScrollView android:layout_width="fill_parent" android:background="@color/tabs_header" android:layout_height="55dip" android:scrollbars="none" android:id="@+id/tabsButtonView"> <TableLayout android:id="@+id/TableLayout01" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TableRow android:id="@+id/TableRow01" android:layout_width="fill_parent" android:layout_weight="1" android:layout_height="0dip" android:paddingTop="5dip" android:paddingLeft="3dip"> <ImageButton android:src="@drawable/linkup_logo_small" android:id="@+id/tabBtt0" android:layout_width="wrap_content" android:layout_marginLeft="2dip" android:layout_marginRight="2dip" android:layout_height="fill_parent" android:padding="5dip" android:background="@drawable/tab_selected"></ImageButton> <ImageButton android:src="@drawable/simplyhired_small" android:id="@+id/tabBtt1" android:layout_height="fill_parent" android:layout_width="fill_parent" android:layout_marginLeft="2dip" android:layout_marginRight="2dip" android:padding="5dip" android:background="@drawable/tab_normal"></ImageButton> <ImageButton android:src="@drawable/indeedcom_small" android:id="@+id/tabBtt2" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="5dip" android:layout_marginLeft="2dip" android:layout_marginRight="2dip" android:background="@drawable/tab_normal"></ImageButton> <ImageButton android:src="@drawable/careerbuilder_logo_small" android:id="@+id/tabBtt3" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="5dip" android:layout_marginLeft="2dip" android:layout_marginRight="2dip" android:background="@drawable/tab_normal"></ImageButton> </TableRow> </TableLayout> </HorizontalScrollView>

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• Android - HorizontalScrollView within ScrollView Touch Handling

  - by Joel

  Hi, I have a ScrollView that surrounds my entire layout so that the entire screen is scrollable. The first element I have in this ScrollView is a HorizontalScrollView block that has features that can be scrolled through horizontally. I've added an ontouchlistener to the horizontalscrollview to handle touch events and force the view to "snap" to the closest image on the ACTION_UP event. So the effect I'm going for is like the stock android homescreen where you can scroll from one to the other and it snaps to one screen when you lift your finger. This all works great except for one problem: I need to swipe left to right almost perfectly horizontally for an ACTION_UP to ever register. If I swipe vertically in the very least (which I think many people tend to do on their phones when swiping side to side), I will receive an ACTION_CANCEL instead of an ACTION_UP. My theory is that this is because the horizontalscrollview is within a scrollview, and the scrollview is hijacking the vertical touch to allow for vertical scrolling. How can I disable the touch events for the scrollview from just within my horizontal scrollview, but still allow for normal vertical scrolling elsewhere in the scrollview? Here's a sample of my code: public class HomeFeatureLayout extends HorizontalScrollView { private ArrayList<ListItem> items = null; private GestureDetector gestureDetector; View.OnTouchListener gestureListener; private static final int SWIPE_MIN_DISTANCE = 5; private static final int SWIPE_THRESHOLD_VELOCITY = 300; private int activeFeature = 0; public HomeFeatureLayout(Context context, ArrayList<ListItem> items){ super(context); setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.WRAP_CONTENT)); setFadingEdgeLength(0); this.setHorizontalScrollBarEnabled(false); this.setVerticalScrollBarEnabled(false); LinearLayout internalWrapper = new LinearLayout(context); internalWrapper.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT)); internalWrapper.setOrientation(LinearLayout.HORIZONTAL); addView(internalWrapper); this.items = items; for(int i = 0; i< items.size();i++){ LinearLayout featureLayout = (LinearLayout) View.inflate(this.getContext(),R.layout.homefeature,null); TextView header = (TextView) featureLayout.findViewById(R.id.featureheader); ImageView image = (ImageView) featureLayout.findViewById(R.id.featureimage); TextView title = (TextView) featureLayout.findViewById(R.id.featuretitle); title.setTag(items.get(i).GetLinkURL()); TextView date = (TextView) featureLayout.findViewById(R.id.featuredate); header.setText("FEATURED"); Image cachedImage = new Image(this.getContext(), items.get(i).GetImageURL()); image.setImageDrawable(cachedImage.getImage()); title.setText(items.get(i).GetTitle()); date.setText(items.get(i).GetDate()); internalWrapper.addView(featureLayout); } gestureDetector = new GestureDetector(new MyGestureDetector()); setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { if (gestureDetector.onTouchEvent(event)) { return true; } else if(event.getAction() == MotionEvent.ACTION_UP || event.getAction() == MotionEvent.ACTION_CANCEL ){ int scrollX = getScrollX(); int featureWidth = getMeasuredWidth(); activeFeature = ((scrollX + (featureWidth/2))/featureWidth); int scrollTo = activeFeature*featureWidth; smoothScrollTo(scrollTo, 0); return true; } else{ return false; } } }); } class MyGestureDetector extends SimpleOnGestureListener { @Override public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) { try { //right to left if(e1.getX() - e2.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { activeFeature = (activeFeature < (items.size() - 1))? activeFeature + 1:items.size() -1; smoothScrollTo(activeFeature*getMeasuredWidth(), 0); return true; } //left to right else if (e2.getX() - e1.getX() > SWIPE_MIN_DISTANCE && Math.abs(velocityX) > SWIPE_THRESHOLD_VELOCITY) { activeFeature = (activeFeature > 0)? activeFeature - 1:0; smoothScrollTo(activeFeature*getMeasuredWidth(), 0); return true; } } catch (Exception e) { // nothing } return false; } } }

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• how to find end of scroll value for HorizontalScrollView

  - by DroidCoder

  i need to implement following scenario, here i have two horizontalScrollViews the upper scrollView is a main menu and lower scrollView is a submenu. when i scroll main menu,the menu which comes under center arrow will show its submenu in lower scrollview and from the lower scrollview, the submenu which comes under center arrow shows the screen for that sub-menu. here's my requirement: i've implemented it using HorizontalScrollViews and ViewFlipper and also it works but it will give correct result only when i scroll it slowly and not when scroll fast. i've used onTouch() method with a ACTION_UP event,so when i release finger from screen it will gives me getScrollX() position at that point but here i need getScrollX() position when scroll is finished/stop. here's my code:- @Override public boolean onTouch(View v, MotionEvent event) { switch (v.getId()) { case R.id.mHorizontalScrollViewMain: if (event.getAction() == KeyEvent.ACTION_UP) { Log.d("test", " " + hsvUpperTab.getScrollX() + " , "+ mViewFlipper.getChildCount()); getUpperTabScrolled(hsvUpperTab.getScrollX()); } break; case R.id.mHorizontalScrollViewSub: if (event.getAction() == KeyEvent.ACTION_UP) { Log.d("test1", " " + hsvLowerTab.getScrollX()); getLowerTabScrolled(hsvLowerTab.getScrollX()); } default: break; } return false; }

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• ListView items not clickable with HorizontalScrollView inside

  - by Felix

  I have quite a complicated ListView. Each item looks something like this: > LinearLayout (vertical) > LinearLayout (horizontal) > include (horizontal LinearLayout with two TextViews) > include (ditto) > include (ditto) > TextView > HorizontalScrollView (this guy is my problem) > LinearLayout (horizontal) In my activity, when an item is created (getView() is called) I add dynamic TextViews to the LinearLayout inside the HorizontalScrollView (besides filling the other, simpler stuff out). Amazingly, performance is pretty good. My problem is that when I added the HorizontalScrollView, my list items became unclickable. They don't get the orange background when clicked and they don't fire the OnItemClickedListener I have set up (to do a simple Log.d call). How can I make my list items clickable again?

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• Dashboard pattern: HorizontalScrollView with pagination or ScrollView?

  - by Macarse

  I am starting a new application and I am willing to use the Dashboard pattern. For example: The Google IO app uses it: My issue is that the amount of buttons will be more than six. I'm not sure if I should use vertical or horizontal scrolling. Vertical scrolling could be done with a ScrollView or a GridView but I am not sure which would be the easier way to implement the horizontal version. I was thinking of using an HorizontalScrollView but it doesn't have pagination. It should feel similar to the tweetdeck app. How would you implement it?

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• Android HorizontalScrollView scroll by page

  - by Ionic Walrus

  Hi all, I have implemented a slideshow in my Android app using . This works well except that I want to scroll to next image on a scroll gesture (now it just scrolls past few images before decelerating). I have couldn't find a appropriate way to do this, should I be using a FrameLayout instead ? How do I scroll to the next (or previous) image on scroll gesture ? Any help is appreciated, thanks.

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• Refresh layout while filling it

  - by neutrino

  Hi guys, I have an activity with a HorizontalScrollView. When it opens, I start filling this view (or rather, a container layout inside it) with another views. This is done from another thread by using handler.post. The views are added in bunches of 15, and when there are no more views to add, I start updating them with new data (this is a kind of streaming data from a server). The problem is that the scrollview is empty until all of the views are added. As soon as they are all added and start updating, the scrollview gets drawn. How do I refresh it in the process of adding views? I don't want the screen to be empty for 3 seconds while all of the views are added. Thanks a lot. UPDATE: turned out this problem is not specific for HorizontalScrollView, this is the case for any generic layout.

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• Synchronize the position of two ScrollView views

  - by Billy

  I am trying to synchronize the positions of two ScrollViews. I'm trying to do this to display a tv guide listing. I have created a custom class that extends RelativeLayout to display the guide. This relative layout has four children: an imageview in the top left corner, a HorizontalScrollView to display the column headers in the top right, a ScrollView to display the row headers at the bottom left, and a ScrollView in the bottom right that contains the listings. This ScrollView then contains a HorizontalScrollView, which in turn contains a LinearLayout with multiple child views that display the data. I hope this explains it clearly, but here's a diagram to make it clearer: ____________ |__|___hsv___| | | | | | sv -> | | | hsv -> | |sv| ll -> | | | etc | | | | |__|_________| I set it up like this because I wanted the guide listings to scroll both horizontally and vertically, but there's no scroll view that does this. Also, I want the row and column headers to display no matter what position the guide listings are at, but I want them to be lined up properly. So I'm trying to find a way to synchronize the positions of the two hsv's, and to also synchronize the positions of the two sv's. I'm also trying to do it in a way that avoids just running a handler every few milliseconds to poll one view and call scrollTo on the other. I'm in no way sure that this is the best way to do it, but this is what I've come up with. If anybody has any other suggestions, please feel free!

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• How to get a TextView in Android have Horizontal Scrolling and autoscrolled?

  - by Hayate

  I want to have a simple TextView with horizontal scrolling, I know that I use HorizontalScrollview for that and I want the text to be autoscrolled continuously. Is that possible?

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• How do I add a custom view to a HorizontalScrollView?

  - by Sunian314

  So, I followed a tutorial for drawing stuff on android. I have created a Panel class that extends SurfaceView that I draw on using a thread. Now I want to put this Panel in a scroll view, specifically one that scrolls horizontally so that I can draw stuff wider than the screen. I would I go about doing that?

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• Horizontal Scrollview inside ListView item?

  - by lanks

  I have a ListView item layout that is using a HorizontalScrollView in the center. I have used the android attribute "android:descendantFocusability="blocksDescendants"" on my parent LinearLayout so that the ListView items are still selectable. The problem I am having is that when clicking the part of the ListView item which is the HorizontalScrollView, the ListView item click event is not called. How can I get the click event of the HorizontalScrollView to call the ListView list item click event?

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• EditText doesn't fill the whole height of the window

  - by user565447

  EditText doesn't fill the whole height of the window. Here is the code: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/LinearLayout01" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="vertical"> <LinearLayout android:id="@+id/LinearLayout02" android:layout_width="fill_parent" android:layout_height="wrap_content" android:orientation="horizontal" > <Button android:id="@+id/bItalic" android:layout_width="wrap_content" android:layout_height="wrap_content" ></Button> <Button android:id="@+id/bBold" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <Button android:id="@+id/bUnderline" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <Button android:id="@+id/bStrike" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="S" /> <Button android:id="@+id/bSub" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <Button android:id="@+id/bSup" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <ImageButton android:id="@+id/bInsertImage" android:src="@drawable/insertimage" android:layout_width="wrap_content" android:layout_height="wrap_content"/> <ImageButton android:id="@+id/bInsertTable" android:src="@drawable/table" android:layout_width="wrap_content" android:layout_height="wrap_content"/> </LinearLayout> <FrameLayout android:id="@+id/FrameLayout02" android:layout_height="fill_parent" android:layout_width="fill_parent" > <TabHost android:id="@+id/tabhost" android:layout_width="fill_parent" android:layout_height="fill_parent"> <TabWidget android:id="@android:id/tabs" android:layout_width="fill_parent" android:layout_height="fill_parent" /> <FrameLayout android:id="@android:id/tabcontent" android:layout_width="fill_parent" android:layout_height="fill_parent" android:paddingTop="62px"> <ScrollView android:id="@+id/scroll01" android:layout_width="fill_parent" android:layout_height="fill_parent"> <HorizontalScrollView android:id="@+id/scroll_hor01" android:layout_width="fill_parent" android:layout_height="fill_parent"> <EditText android:id="@+id/VisualPane" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </HorizontalScrollView> </ScrollView> <ScrollView android:id="@+id/scroll02" android:layout_width="fill_parent" android:layout_height="fill_parent"> <HorizontalScrollView android:id="@+id/scroll_hor02" android:layout_width="fill_parent" android:layout_height="fill_parent"> <EditText android:id="@+id/HTMLPane" android:layout_width="fill_parent" android:layout_height="fill_parent" /> </HorizontalScrollView> </ScrollView> </FrameLayout> </TabHost> </FrameLayout> </LinearLayout> Here is a screenshot: Why doesn't EditText fill the whole height of the window?

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• how to make the user add and delete in android

  - by user3678019

  i have 1 activity .. and in this activity i have 2 web view next to each other , i would like to add , ADD and Delete Button that can add one more web view next to the last web view , and the delete wish will delete any of the web view the user choose . and i want to make the user but it in the order he want like webview 1 first then webview 2 second how can i do this this is mu 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" tools:context="test.zezo.test.Main$PlaceholderFragment" > <HorizontalScrollView android:id="@+id/horizontalScrollView2" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_alignParentLeft="true" android:layout_alignParentRight="true" android:layout_alignParentTop="true" > <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="horizontal" > <WebView android:id="@+id/webView1" android:layout_width="350dp" android:layout_height="match_parent" android:layout_alignParentLeft="true" /> <WebView android:id="@+id/webView22" android:layout_width="350dp" android:layout_height="match_parent" android:layout_toRightOf="@+id/webView1" android:layout_alignParentLeft="true" /> </LinearLayout> </HorizontalScrollView> and this is a part of my main.java webView = (WebView) findViewById(R.id.webView1); String url = "http://google.com"; webView.getSettings().setJavaScriptEnabled(true); webView.loadUrl(url); webView.setWebChromeClient(new WebChromeClient()); webView.setWebViewClient(new WebViewClient()); WebView webView22 = (WebView)findViewById(R.id.webView22); webView22.getSettings().setJavaScriptEnabled(true); webView22.loadUrl("google.com); webView22.setWebChromeClient(new WebChromeClient()); webView22.setWebViewClient(new WebViewClient()); so how can i do the ADD and DELETE and re Order Buttons to it and one more thing it should be save so when he reopen the app it will be the same as after he add or delete or re order

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• Android horizontal scollview behave like iPhone (paging)

  - by Davide Vosti

  I have a LinearLayout inside a HorizontalScrollView. The content is just a image. While scrolling, I need to achieve the same behavior you get when setting the paging option on a the iPhone equivalent of the HSW (scrolling the list should stop at every page on the list, not continue moving). How is this done in Android? Should I implement this features by myself or there is a particular property to set or a subclass of HSV to implement? Thanks

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• Android: How to detect end of scroll

  - by Mix

  Hi! I need to implement HorizontalScrollView which is scrolled to predefined positions (similar to Home behaviour). It works with slow gestures, but does not work with flings. I hooked to View.onScrollChanged() and it is called when scrolling happened, but I can't determine when scrolling ends. In theory there should be a way to say that fling is over. Is there such API?

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• How can I place a SurfaceView inside one or more scrollviews ?

  - by Mervin

  Hello, I'm making a 2D game for Android and I've encountered the following problem: - I have made a class that extends SurfaceView and draws my graphics (the size of the canvas that I use has to be 1664x864). This is ofcourse too big for the screen so I needed scrolling, I chose to use google's ScrollView and HorizontalScrollView (nested) for this, But whenever I add my SurfaceView to a ScrollView (whether it's 1 or 2) via AddChild it only draws the ScrollView , SurfaceCreated() isn't even called on the SurfaceView. (Drawing the SurfaceView in a layout without adding it to a ScrollView does work.) I realize that there are other options for scrolling like a screen-sized canvas and bitmap offsets but this would really be my preferred way to go. I would really appreciate some help to make this work.

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• How to retain canvas state and use it in onDraw() method

  - by marqss

  I want to make a measure tape component for my app. It should look something like this with values from 0cm to 1000cm: Initially I created long bitmap image with repeated tape background. I drew that image to canvas in onDraw() method of my TapeView (extended ImageView). Then I drew a set of numbers with drawText() on top of the canvas. public TapeView(Context context, AttributeSet attrs){ ImageView imageView = new ImageView(mContext); LayoutParams params = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.FILL_PARENT); imageView.setLayoutParams(params); mBitmap = createTapeBitmap(); imageView.setImageBitmap(mBitmap); this.addView(imageView); } private Bitmap createTapeBitmap(){ Bitmap mBitmap = Bitmap.createBitmap(5000, 100, Config.ARGB_8888); //size of the tape Bitmap tape = BitmapFactory.decodeResource(getResources(),R.drawable.tape);//the image size is 100x100px Bitmap scaledTape = Bitmap.createScaledBitmap(tape, 100, 100, false); Canvas c = new Canvas(mBitmap); Paint paint = new Paint(); paint.setColor(Color.WHITE); paint.setFakeBoldText(true); paint.setAntiAlias(true); paint.setTextSize(30); for(int i=0; i<=500; i++){ //draw background image c.drawBitmap(scaledTape,(i * 200), 0, null); //draw number in the middle of that background String text = String.valueOf(i); int textWidth = (int) paint.measureText(text); int position = (i * 100) + 100 - (textWidth / 2); c.drawText(text, position, 20, paint); } return mBitmap; } Finally I added this view to HorizontalScrollView. At the beginning everything worked beautifully but I realised that the app uses a Lot of memory and sometimes crashed with OutOfMemory exception. It was obvious because a size of the bitmap image was ~4mb! In order to increase the performance, instead of creating the bitmap I use Drawable (with the yellow tape strip) and set the tile mode to REPEAT: setTileModeX(TileMode.REPEAT); The view now is very light but I cannot figure out how to add numbers. There are too many of them to redraw them each time the onDraw method is called. Is there any way that I can draw these numbers on canvas and then save that canvas so it can be reused in onDraw() method?

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