Android :: How To Set Size Of Multiple Buttons On Content?
May 3, 2010
I am using three buttons along with the list view.These three buttons are added to the layout using the TableLayout and TableRow.The first button takes more space on content, so the other two becomes smaller in size than first one. When the application runs, it doesn't even show the two other buttons.How can I make the size of three buttons equal and display all of them when application runs?Give me some example please.
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Feb 18, 2010
I'm working on an application using xml layouts.
I wish to know which is better:
1. Use few activities and change its contentview
2. Use an activity for each 'view' needed
If both works, in which case which option would be better?
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Mar 15, 2010
I have a fairly complex activity the parent being a linearlayout with a table with some basic info and buttons. Then a couple listviews that the user can add items to. So these listviews grow more and more as the user uses the app. The problem I'm running into is the Linearlayout is bigger then the resolution of the screen and so it needs to scroll. So the scrolling doesn't work on the Listviews. I've tried playing with changing the layout_height of the listview and its child element with no success. Is there a way to make these couple listviews expand out to the amount of children? Or am I going about this all wrong? If so what other controls can I use?
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Feb 19, 2010
I have a full screen dialog that has a relative layout that contains a TableLayout. Whenever the soft keyboard is displayed on the screen, it shrinks these buttons. Instead of filling the bottom of the screen, they only fill a third of it. How can I keep the size of the buttons the same similar to the Contact app?
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Jun 25, 2010
I have created a custom Button class and I want to be able to change its width/height depending on some factors in addition to the content width/height. How can I do this?
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Jul 22, 2010
I am developing a set of apps that are distinguished only in certain brandings (think different sports teams); however, I am running into a problem where I am using one Library project for all of the specifically branded apps and want to use the same ContentProvider for all of them. When I created the ContentProvider I declared the AUTHORITY as a constant in the class (per the dev example code) and I am using the same authority in every specific app in the manifest files. It looks like I can't use the same authority across every app as I get this error when trying to install a second app (I install one branded one just fine but the second install):
WARN/PackageManager(66): Can't install because provider name com.xxx.Provider (in package com.xxx) is already used by com.zzz
I've tried several approaches but none of them seem to work. One idea that I haven't done yet, was to create a library jar and just omit the Provider class I have and customize it in each specific app. Any ideas on how to get around this problem without resorting to that?
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Sep 4, 2009
I would like to know the way to make a user interface for Android for people that have low vision. The idea is to make a UI with the following features: 1- Uses very very big buttons. 2 -Uses very big font size. 3- Te colors to use are basically black and white (for more contrast). 4- The icons in this UI are not relevant. 5- We must sacrifice the number of chars that we can show in the screen to get bigger labels and buttons. 6- A simple zoom system for the images should be a great idea. 7- We can use the camera of the phone to get a magnifying glass. I'm member of a blind people association in Spain and we think that this should be a great idea for begining a new low-vision-user- interface that is not aviable in the market for the new mobile phones. This will help many people that uses movile phones but have many difficulties to work with them.
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Nov 24, 2010
I have a options-menu (when u press menu key of the phone), with 5 buttons, all of them with one 48x48 image and text. now the buttons need's two columns to be displayed, but i want to reduce the size of them to fit one column with all of the buttons how i can achieve this? i can do it with parameters on layout xml menu file?
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Mar 2, 2010
I designed the user interface of my app on the emulator and then I installed it on the Nexus one. For some reason the text boxes, labels buttons etc. have shrink in size. It looks as if the view has been zoomed out on the phone. If I arrange it correctly on the phone the objects don't fit on the emulator. Has anyone faced this? Is there some setting to have consistency between the look of the emulator and Nexus One.
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Nov 24, 2010
I have these radio buttons and they need android:width="X" and android:height"X" however, I do not know how to set these properties so that they adapt to a different screen size.
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Aug 12, 2010
I have an android context menu with various selections and depending on the user selection I want to start an intent. The intent starts the same activity for all the buttons but will contain different String variables depending on the selection. I am currently using a switch, case methodology for my click listener but keep running into 'duplicate local variable' problems as I try to eliminate code repetition! If anyone could provide a-bit of pseudo-code that would be even better.
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Mar 27, 2010
IŽm working on the UI of my first app and IŽd like it to work on as many different devices as possible. IŽve read on the net about AndroidŽs rule not to resize bitmaps on views (background, buttons, etc), is it true? Does android rescale skinned views sizes the same way it resizes the default ones? Also, if not, how can I handle the more than 5 display sizes using a background image and skinned buttons and scrollers (horizontal bar)?
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Oct 25, 2010
I have several Gmail accounts and I would like to have a desktop button for each one. Is there a way to do this? Currently there is one button for Gmail and once I open it I can select the account I want to see.
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Aug 21, 2009
I am writing a program where I need a ListView for which I am using a ListActivity. Each one of the views within the ListView has four buttons, (Off, Dim, Bright and On). Each one of these buttons is configured with it's own OnClickListener when I build the view. This part seems to work ok. However when I have say 5 Views each which has these four buttons, I can tell whether an off, dim, bright or on button was pressed but I cannot tell from which view it was pressed. So for example if my views are devices (Light, Heater and Kettle) I press an "on" button and I know an On button was pressed but how do I get it to tell me the On button for the Light was pressed?
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Sep 11, 2009
I have a layout with multiple buttons. Now I need to scroll them horizontally. Below is the part of my xml file. But I am not able to get the scroll bar and also not able to see the Buttons 4 & 5.
CODE:.................
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Aug 8, 2010
The following code is from http://developer.android.com/guide/topics/ui/ui-events.html and shows how to handle a click on a button (called corky, I think) If I had several (say 10) buttons on a form, each launching a different subscreen, would I have to find and repeat the setOnClickListener statement for each button, then put a switch statement in the onClick subroutine, or is there a better way to do it? (I'd rather not resort to naming my buttons Button1, Button2 etc and using a loop). code...
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Aug 9, 2010
I'm trying to develop a very specific app for my Dell Streak. I want the entire app to run landscape. The Streak has a tilt function that switches the whole OS to a landscape 800x480.
So I want to make an ADT to test in that uses an 800x480 display, but whenever I set the size I get no buttons. The Streak has a Home, Menu and Back button aswell as volume/mute and power, and I need to use some of them for my application.
I'm not worried about the tilting messing up my application. Not yet, anyway. Just need the test environment the right size and with buttons.
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Nov 10, 2009
I have an app that I would like to keep 1.5 compatibility but support the additional display resolutions of more recent devices like the Droid. I've read the suggestions in the dev guide, specially the legacy applications section, since that's exactly what I want to do.I'm not running in compatbility mode, so anyDensity is set to true and all screen sizes are allowed in the manifest. I've recreated all my graphical elements so they don't get upscaled on a 480px-width screen (called "hires-bitmaps" in the following).If I put the hires-bitmaps into drawable-hdpi and leave the others in drawable, the emulator2.0 (WVGA854, density @ 240) displays them perfectly. On the other hand, the emulator1.5 (320x480, density @ 160) - and my HTC Hero - ALSO use the hires graphics in drawable-hdpi. That's a problem because the hires graphics scale slightly differently and I don't want the app to resize too much.As mentioned in the dev guide I can prevent this by adding the API version number to the resource folder. Not very convenient since I'd have to keep the hires bitmaps twice (drawable-hdpi-v4 and drawable-hdpi-v5), but I nevertheless tried it. Result: emulator2.0 uses low-res graphics from "drawable" (which is bad), emulator1.5 as well (which is good). And what's weird: emulator1.6 (WVGA854, density @ 240), uses hires-graphics. Now that seems odd.
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Apr 13, 2010
I've read the Android documentation:
http://developer.android.com/guide/practices/screens_support.html
but still have some questions. I'm trying to design a music application which basically has images of the instrument (ImageButton) that play a sound when clicked. However, I'm confused about how to have the ImageButtons scale to fit all the different screen sizes and how to position them.
Which layout is best used for needing to position ImageButtons in specific locations on the screen? (i.e. cymbals on a drum set) FrameLayout, RelativeLayout? If I only really care about medium and large screens, do I need to create different resources (images) for both as well as a different XML layout to position them? I'm trying to find the simplest way to do this without having to create a separate layout XML file for positioning/size and separate image resources for each screen.
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Nov 10, 2009
I've a ListView where every element in the list contains a TextView and two different Buttons.I found a solution as described in my answer below. Now I can click/tap the button via the touch screen. However, I can't manually select it with the trackball. It always selects the whole list item and from there goes directly to the next list item ignoring the buttons, even though I set .setFocusable(true) and setClickable (true) for the buttons in getView().This causes that no list item is selectable at all any more. But it didn't help in making the nested buttons selectable.
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Mar 25, 2009
I am new to android and trying to create a customized list. Every item in the list has TextView and one Ratingbar. I now want add a couple of command buttons at the end of the list (like BACK, HOME, , NEXT). When I add these extra views to the layout xml file then they get added along with every item in the list. I think there should be another layout defined for the buttons to be displayed separate from the list. Anyone has an idea on how to do this?
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Oct 8, 2010
I am trying to put CheckBox with multiple lines and all lines after fist with smaller font size same as we have under from home page Menu->Settings->Sound & Display->Silent mode. It shows text "Silent mode" on first line and then some more text (kind of help/current settings) for this option and still CheckBox itself is aligned in the center of all the lines (may be on left or right side). Is that can be done by only one control/widget or group of many controls/widgets?I can only think of by using table but it is complex.
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Nov 11, 2010
I am trying to develop an app for which I want multiple screen support. I have read the Android article on Best practices for Multiple Screen Support. As per the article we have to follow 3 important things:
1. Mention support for different screen sizes (large, medium and small) and any density in AndroidManifest.xml.
2. Place images of 3 dpi's (120, 160, 240) in 3 folders res/ldpi, res/ mdpi and res/hdpi.
3. In layout's the dimension should be mentioned in "dip" units. Then Android will take care of the scaling on its own.
I have implemented all these points in my project. The images are picked up correctly from the appropriate folders. But the arrangements of the controls in not same. e.g. I ran the app on three emulators 1. Resolution 240*320 dpi 120. 2. Resolution 240*320 dpi 160. 3. Resolution 240*320 dpi 240. (All the emulator have same resolution but different density). The problem is the position of the controls is not same on all the three emulator. As per my understanding if the android:layout_marginLeft and android:layout_marginTop are mentioned in "dip" then this problem should not occur. As the density of the emulator increases the controls get placed more towards the right. Is it necessary that I provide layouts for all combinations of dimensions and density i.e. in layout-small, layout-large, layout- medium, layout-long,layout-notlong?
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Aug 12, 2009
This may seem like a stupid question but I need to be sure. I was wondering if it was possible to pro-grammatically change the Content Provider used when making a query given a Content URI. The reason being I need to know if it's possible to force the Calendar/Contacts applications to read from a different database via a different Content Provider temporarily while my application is running, so that I can reuse those applications to display my own data. Since the Content URI s are hard coded in each of these applications the only way it might be possible is if we could somehow temporarily change the Content Provider used for a given URI. I know this probably isn't possible, I just need to show it isn't. Could someone confirm this can't be done?
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Jul 29, 2009
I am not able to find out the perfect layout(viewgroup) to place four buttons as shown in the attached image. Basically, i want to place four buttons near the top/left/bottom/right edge of the screen. AbsoluteLayout helped, but it is deprecated (It is also better to avoid AbsoluteLayout as it is not very flexible for orientation changes)
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Mar 1, 2010
I am having a hard time understanding content providers. In the notepad example and others, the content provider never even declares its CONTENT_URI anywhere inside itself, yet the docs say to publicly declare this. It's declared in a different class. So when an activity queries a content provider with a CONTENT_URI, how does Android know which one I want. I see no link between a content provider and its CONTENT_URI declared in another class.
I also don't how to think about intents and content providers. I know that you don't call an intent on a content provider. But an activity queries a content provider without an intent, and an activity has a mimetype attribute in the manifest that would seem to tie it to a content provider.
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Sep 23, 2010
So I'm loading images from a web service, but the size of the images are sometimes smaller or bigger than other images and the visualization looks silly when I put them in a ListView in android. I'd like to fix the size of my ImageView so that it only shows a portion of the image if it's larger than a preset amount. I've tried everything I can think of setting the setMaxWidth/setMaxHeight, setting the scale type to centerCrop, using ClipableDrawable wrapping my BitmapDrawable, setting using Drawable.setBounds(). I've tried setting in the XML and programmatically, but neither worked. I'm very surprised setting max width/height didn't do anything. Below is the XML I'm using ImageView definition in my layout file
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Oct 2, 2009
I am currently developing a dictionary application with voice database. I would like to know about the current Android limitation on the file size. I am using a self-provided sqlite database ( > 50mb ) . I tested that once the built .apk size exceeds ~30mb the app will not be installed onto the simulator (INSTALL_FAILED_ INSUFFICIENT _STORAGE). Could anyone confirm me that if up until now there is no way to embed such large size files in a single apk ( Aimed to sell at Google Market without requiring user to download datafile afterwards). Also, is there a limitation of 1,048,576 bytes for a single file in the assets folder ?
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Jan 22, 2009
if size of image is larger than or smaller than specified display size (on screen), then it is automatically, compressed and stretched resp by android run time or require to handle by explicitly.
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May 7, 2009
Hi,
I would like to see how my app works on a 800x600 android netbook. how can i setup an emulator with this size?
thanks chris
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