Android :: Expand Clickable Area Of An ImageView By Using Padding?
Nov 5, 2010
I have an ImageView, and I want it to be clickable. The image itself is only 32x32 pixels, but I want the clickable region to be larger so it's easier to hit. I was hoping I could set the layout margin values to increase the size of the imageview's clickable area:
<ImageView
layout_width="32dip"
layout_height="32dip"
layout_margin="20dip" />
That doesn't work, what I could do is just recreate the image resource to have a larger transparent region around it. That's a bit annoying because it's hard to tweak if I ever need to change the clickable region. It's not just a single png either, it's a statelistdrawable so I have to resize 3 different pngs if I ever need to tweak the clickable area.
Anything else I can do?
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Oct 16, 2009
I'm doing the HelloViews Gridview tutorial and I ran into this problem.
http://grab.by/9Vn
I have a padding that I can't find where is it coming from.
XML is the following: <?xml version="1.0" encoding="utf-8"?> <GridView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/gridview" android:layout_width="fill_parent" android:layout_height="fill_parent" android:numColumns="2" android:verticalSpacing="0px" android:horizontalSpacing="0px" android:stretchMode="columnWidth"android:gravity="center" android:layout_margin="0dp" />
and in my adapter:
I can't seem to find the place where I can get rid of that padding (or margin). Pictures are 160px x 160px.
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Apr 14, 2010
I have a ImageView and draw some things on that view. Now I want to have the position of the click in the onClickListener. Although I think that's not really possible (storing the position in the onTouchListener is not working), I want to ask, if there is any other way to accomplish that? The goal is to have a image with some overlays, that should be clickable. I thought about AbsolutLayout, but that is depracated, so what now?
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Nov 21, 2010
I have a problem with rendering a ScrollView. Essentially, the layout is fixed header and footer with a scrollview in the middle. The idea is that when the screen keyboard is activated for the content EditText the image can be scrolled if the height of the image is longer than the middle view.
In testing the layout, I've found that on my Android phone (Xperia X10 Android 1.6) there is a whole heap of padding added to the top and bottom of the ImageView.
How I can prevent this from happening.
CODE:....................
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Jun 19, 2010
right away I am doing an app for an festival, and I want to make a area map / area plan. I have got a picture (bigger then the screen) and I want to be able to move it up/down and to the left/right. Further I want to place smaler icons (like the stage, you should be able to click on it and see who is playing) or doing the same in de big picture and get the touch with a x/y request.but I haven't got an idea how I could realise this,
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Nov 23, 2010
The display area of my SGS has been reduced there is now a black line (approximatively 1 millimeter thick) around the display now anything that should be displayed has been centered (a kind of)i have noticed that after press-holding the HOME BUTTON (to get to the task manager).even when the phone that black border is still there and it look like the screen has been pushed down the display is not now at the same level as the top-cover (or screen cover).I have used the factory reset but nothing has changed.My phone look horrible now.
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Jun 15, 2010
I have a listlayout with items in it that looks like this:
There is first an ImageView (the light) and then two textViews. All of this inside a TableLayout. (source here: http://code.google.com/p/switchctrl/source/browse/trunk/android/res/layout/device_switch.xml)
I want to have a rotating animation of a loading indicator Ontop of this light when this particular device (light) performs an action or an action is performed on it.
How do I put an animation ontop of this light imageview?
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Aug 10, 2010
I have a horizontal LinearLayout. This LinearLayout has a checkbox next to another LinearLayout. The layout width/height of the checkbox is wrap_content, whereas the inner LinearLayout is fill_parent/wrap_content. The layout_weight of the inner LinearLayout is set to 1.
I've tried to add some android:padding around the checkbox to give some space around it, but no padding is given. I've also tried android:paddingLeft/Right/etc. How do I get some padding around my checkbox?
Note: I have an inner LinearLayout because I will be adding more TextViews
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="?android:attr/listPreferredItemHeight">
<CheckBox
android:id="@+id/mycheck"
android:text=""
android:layout_width="30dip"
android:layout_height="wrap_content"
android:gravity="center_vertical"
android:focusable="false"
android:background="@drawable/checkbox_background"
android:button="@drawable/checkbox"
/>
<LinearLayout
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_weight="1"
android:layout_height="wrap_content">
<TextView
android:id="@+id/mytext"
android:layout_width="fill_parent"
android:layout_weight="1"
android:gravity="center_vertical"
android:layout_height="wrap_content"
android:lines="1"
android:textColor="@color/white"
android:textSize="10sp"
android:textStyle="italic"/>
</LinearLayout>
</LinearLayout>
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Nov 23, 2009
Is there a way to expand the VM limit in Android 2.0 on an actual device? Using java.lang.Runtime.maxMem() on a Droid reveals a limit of 24MB, and I've written some code that incrementally allocates memory until failure to verify that figure. You can set the VM size in the emulator, but I haven't yet found a way to do that for a connected phone. Is there some type of a properties file on the device itself that can be modified?
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Oct 4, 2009
By default, there are only 3 screens for google g1. but i know some applications can expand them to 5 - 7 screens.
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Nov 21, 2010
I need to resize several images inside ImageView to screen size. Currently I use scaleType="centerInside", it works good for bigger images to scale them down to screen size but doesn't expand small images.
All other suggested options crop or deform image. Is there any way to expand images (keeping ratio) via XML or do I have to do it manually in code?
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Oct 18, 2010
I'd like to allow possible inputs of 0-9, "," or "-" for EditText and couldn't find an answer.
I know using the "|" as an separator is possible: android:inputType="number|text"
But how can I archive something like this (too bad it doesn't work): android:inputType="number|,|-"
Addition to the comment below:
CODE:................
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Oct 27, 2010
I'm using xml file to define progress bar. I defined padding on background shape. But this setting will be sometimes displayed correctly, sometimes not. So If I start my application or Activity with progressbar inside, there will be correctly displayed progressbar with background and 'padded' progress. Then I close my application and start it again, and, progressbar is displayed without padded background, on next start will be displayed correctly and son on ... Could you please advice possible reasons for this?
xml file:..................
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May 31, 2010
I have a list where i basically need a hierarchy of items. Any children of an item would be padded slightly, as to easily distinguish their parent item. How could this be achieved? Note that i could, if needed, make each parent show no children, and then when the parent is clicked, a new list containing all of it's children is loaded. This however requires more clicking to display information than i would prefer. Also, the items themselves will contain graphics and whatnot (to show a drag'n'drop button, etc), so it would be best if it visually appeared as if the item itself had a margin, rather than the contents of the item being padded.
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Apr 26, 2010
I have a linear layout which has a background image (a 9 patched png file). How can I add padding to left and right so that the background image does not take up the whole width? I have tried 'android:paddingLeft' and 'android:paddingRight', but that does not change anything.
CODE:.....
The whole background still stretches the whole screen width.
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Sep 28, 2010
I have the following layout. This defines a row in my ListView. I noticed that the text is not centered in the row. There seems to be extra bottom padding. How can I make the text appear in the center, vertically, so there is no padding? code...
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Oct 18, 2010
what is the difference between padding and margin?
i want to draw a view exactly at 200 dip from the top of the screen(0,0). there are some layout in the middle.
how do i draw a view exactly at 200 dip from the top?
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Jan 27, 2010
I have an ExpandableListView contains a link, it does not expand when has a link, and i want the link is clickable.
CODE like this:
CODE:..............
And:
CODE:........................
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Jan 16, 2010
I am new to java, eclipse, and android development, so I may be missing something simple although I have checked basic stuff like spelling several times.
Because there is no number picker control (such as that used in the date picker) in the public Android SDK, the conventional wisdom is to "clone and own" the control that exists in the Android source.
In an attempt to do that, I have copied the code for NumberPicker into my project and its dependency, NumberPickerButton. I have also copied the supporting resources.
The problem I am having is that when I try to include the NumberPicker in a layout, the rendered version of the layout within Eclipse does not work.
CODE:...............
Adding that tag causes the Layout view of the XML file to only show the following error.
ClassCastException: com.spencerandbrown.PatientTracker1.NumberPickerButton cannot be cast to com.spencerandbrown.PatientTracker1.NumberPickerButton
I have tried both the fully qualified name and the unqualified name and it makes no difference.
The strange thing is that the control works at run time, it just will not render in Eclipse.
Is there a solution for this issue? Am I just doing something wrong?
If necessary, I can include more code from my project to clarify.
If I reference the internal Android widget, it works fine in the Eclipse layout view, but it is clumsy to interact with that way and it might break in the future.
CODE:............
Here is the stack trace from Eclipse.
CODE:........................
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Apr 24, 2010
I have a simple list view listing results in android. Upon click of each item, I would like it to slide down expand and show the content. Is there an easy way to do this in android?
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Sep 8, 2010
Is there any settings/flags to expand the summary text of a notification to two lines instead of 1? The text I am trying to put is too long and it goes over the visible area? Will try something like (text+"/n"+restOfText) tomorrow but I don't think it's going to work...
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Jul 28, 2010
The reason: I'm trying to make Android work in a device without touch screen.
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Apr 2, 2010
I'm following an example where the author hard coded a paddingTop to 370px. How do I make that paddingTop dynamic? When I run this in 2 AVDs with HVGA and WVGA80 I get the frame floating at different heights. I'd like to say something like paddingTop=80%, but that doesn't work.
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Sep 12, 2010
I have a 3*3 TableLayout that contains buttons. But I cannot seem to remove the spacing between the buttons in the Table.Setting pading to zero for the buttons has no effect. Setting padding and layout_margin to zero for the TableRow has no effect. Setting layout_margin for the TableLayout has no effect.Any idea on how I can alter/remove/reduce the spacing between the cells?
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Mar 2, 2009
I am trying to create a NinePatchDrawable programmatically, but there is no documentation on the constructor's argruments (Bitmap bitmap, byte[] chunk, Rect padding, String srcName). Does anyone know what chunk and padding are... and how to specify them?
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Oct 30, 2009
Difference between View margin and padding , mPadding and mUserPadding?
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Oct 25, 2009
I have a shape with a gradient that I'm using as a divider between ListView items. I've defined it as follows:
<?xml version="1.0" encoding="UTF-8"?>
<shape
xmlns:android="http://schemas.android.com/apk/res/android"
android:shape="rectangle">
<gradient
android:startColor="#ccd0d3"
android:centerColor="#b6babd"
android:endColor="#ccd0d3"
android:height="1px"
android:angle="0" />
</shape>
I would like to add 6 pixels of padding on either side of the gradient, so that it doesn't extend from edge to edge of the screen.
However, no matter where I put an android:left="6px" and android:right="6px", it doesn't seem to take effect. I can put it in the <shape> element, the <gradient> element, or in a separate <padding> child of <shape>, and it doesn't change anything.
How can I add padding on the left and right of my list divider?
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Aug 15, 2009
I am trying to set padding in shape declared in XML file. But whatever I set, nothing changes related to padding. If I modify any other properties, I see updated UI. But it doesn't work with padding. Could you please advice possible reasons for this?
I will provide below example of my shape.xml:
<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="rectangle">
<stroke android:width="1dp" android:color="#ffffff" android:dashWidth="2dp"/>
<solid android:color="@color/button_white_cover" />
<corners android:radius="11dp" />
<padding android:left="1dp" android:top="20dp"
android:right="20dp" android:bottom="2dp" />
</shape>
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Aug 23, 2010
Basically I am trying to recreate the default contact screen when you click on "+" button another row of Phone number added to the list. Right now I have an ImageView as the "+" button and a ListView to contain the list of phone numbers. The problem is that the ListView doesn't expand when I add more item into the list. I could build the same look with LinearLayout but how can I save all those numbers that way? Below is the layout of the item that will be inflate with custom Adapter:
<?xml version="1.0" encoding="utf-8"?> <TableLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content" android:layout_height="60px"
android:stretchColumns="1" android:background="#FFFFFFFF"
android:gravity="center_vertical"> <TableRow>
<Button android:id="@+id/type" android:layout_width="wrap_content"
android:layout_height="wrap_content" android:paddingLeft="10dp"
android:text="Home" /> <RelativeLayout android:layout_width="fill_parent"
android:layout_height="wrap_content" android:paddingLeft="10dp"
android:paddingRight="10dp" >
<EditText android:id="@+id/value" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_alignParentTop="true"
android:layout_alignParentLeft="true" android:text="" android:hint="Name"
android:lines="1" android:textSize="10pt" android:typeface="sans"
android:textColor="#FF000000" android:gravity="left" /
</RelativeLayout> <ImageView android:id="@+id/del"
android:layout_width="wrap_content" android:layout_height="wrap_content"
android:layout_alignParentRight="true" android:layout_alignParentTop="true"
android:paddingRight="14dp" android:src="@android:drawable/ic_delete" />
</TableRow> </TableLayout>
This is the ListView portion.
<ListView android:id="@+id/phoneList" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:background="#FFFFFFFF"
android:scrollbars="none" />
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Jan 26, 2009
I am probably missing something totally obvious, but can someone tell me how to add padding between buttons of a Linear Layout?
Code...
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