Android :: 9 Patch Background Image Affects Margins?
Feb 15, 2010
i have list views with image views and text views etc in them, and i'm trying to fix up a situation where the background image of a list element changes in the "pressed" state. if there's a straightforward way of doing that, please let me know! right now, i override onTouchEvent() in the topmost view, and also in those child views who don't just delegate to their parents which would be image views. i have to check for long clicks myself, but basically this scheme works. the list views are potentially different sizes depending on how much text is in the views etc, so i thought i would use a 9-patch as the background. however, when the background changes from flat white to the 9-patch, this seems to indent the view a bit - ie give it margins. eh? if i change the image to a non-9-patch, the margins remain as they are. i've tried different sizes of 9-patch, from 320x150 or so down to 100x30 etc, no change. what's going on?
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Oct 11, 2010
I encountered this problem when updating my background to use a 9-patch image. The layout is fine on different screens using different sizes of the same image, but when I change the image to be a 9-patch it breaks the entire layout mysteriously.
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Aug 21, 2010
As the title says, I cannot get padding around the text.Here's my xml:
<style name="StandardButton" parent="@android:style/Widget.Button">
<item name="android:background">@drawable/nine_patch_3</item>
<item name="android:textColor">@color/white</item>
<item name="android:textStyle">bold</item>
<item name="android:paddingLeft">10dp</item>
<item name="android:paddingRight">10dp</item>
</style>
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Nov 29, 2009
I'm trying to create on of these images, but Eclipse won't accept it once I've used the draw9patch tool. I've found other people having the same problem, and saw this comment: I discovered later that the problem I was having was caused by the image not being exactly true to the nine-patch spec as defined in the documentation. Once I fixed the image to have a clean (i.e., no gradients etc) one pixel border it was fine. "'m not much good when it comes to image design. What does this mean, how do I create my original png file to meet the specification for Nine Patch?
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Sep 10, 2010
I am having problems with nine patch images ( **.9.png ). I have a widget layout and would like to use nine patch images for the widget's backgroud. Here is my background.xml...
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Oct 8, 2010
I have an image with a fixed size , ex. 300 x 300 ; it was a background image of my view. But my view size was dynamic , so i need an image which can stretch , according to desired size. can any one tell me how to make it ? I know we have to use nine oatch drawable ? i don't know how to tool given with android sdk ? can any one tell me how to make image to png?
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Jun 21, 2010
I am trying to use a nine patch image as a background in an android game. The image expands well in multiple resolutions but, my game has slowed down by 10 fps. I used to get a consistent 45 to 50 fps now I get 35 fps. The question is when we use a nine patch as a drawable and set it as a background in a view does it have any performance implications as opposed to a plain bitmap drawing.
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Jun 1, 2009
I have a ListView containing a few different type of items, all having their own background image and font color. In my first implementation I implemented each type of item as its own layout with the background image etc defined in XML (and implemented Adapter.getView() so that it only reuses convertView if it's of the correct type). This works fine but the performance is not that great while scrolling since I'm inflating quite a few Views due to convertView mismatches, so instead I tried using the same layout for all items (to benefit fully from convertView reuse) and changing the background image and font size in runtime. I even keep the three background Drawables I need as members to save time decoding them from a resource for each item, and call View.setBackgroundDrawable() from Adapter.getView(). The problem is, sometimes the 9-patch is not correctly wrapped around the content of the list item when using this approach. While scrolling it usually looks correct but when the scrolling stops, or sometimes when I just tap anywhere on the list, the background 9-patch of some large items starts flickering and is either cropped or resized to its original PNG size rather than stretched to wrap the content.
First of all, I suspect this is a bug? Any ideas why this happens? Could it be that the View is not always measured to reflect the changed content when the 9-patch is applied? I have tried adding an extra call to View.invalidate() but it doesn't solve the problem. Second, does this approach sound reasonable at all, or how should I go about to optimize this scenario?
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Oct 29, 2010
I'd like to use a 1x1 size Nine-patch image from Android drawable resources. When I'm trying to display it with <ImageView> in my layout xml file, this one is never showing up on the Android emulator device. Here's the xml code below. Code...
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Aug 26, 2010
I am working with android's 9 patch image emulator to create 9 patch image..
Can anyone tell me how it actually works?
On what basis it Scale the image?
What are the parameters it considers to stretch image?
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Feb 10, 2010
I am trying to create a menu that slides up from the bottom.It starts with the menu's view just visible at the bottom of the screen, and then clicking it causes it to slide up.I tried using a TranslateAnimation, but although the pixels move, the hit areas of the menu are in the same position as before.So I think that if I can adjust the menu's margins after the animation is complete, this will accomplish what I want.However, I can't figure out how to adjust the margins.I've tried to create a LinearLayout.LayoutMargins object and then set its margins and apply it to the menu's view (which is a LinearLayout), but this doesn't work.
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Sep 4, 2010
I have a FrameView that's created in my XML layout, and in my code, I'm trying to create a series of new ImageViews and add them as children of this FrameView. The ImageViews are small, only about 15 pixels square, and I want them to show up in various positions around the FrameView (I'm trying to implement what looks like a radar screen). I'm able to create them and add them just fine, and they show up on the screen.
However, when I try to set their margins, it doesn't seem to have any effect. No matter what I set, all the ImageViews show up in the top left corner of the FrameView, as opposed to offset by the appropriate margins. My XML layout is listed below, along with the code that generates the child views. Am I doing something wrong? How can I get the margins to show up properly? Or is there a better way to do this than by using margins.
XML:
CODE:....................
Java:
CODE:...............................
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Apr 11, 2010
I want to add ImageView to FrameLayout with Gravity or margins. but FramLayout and ImageView has no method about that(Actually, I can't found that). Reason that selects Framelayout is to put ImageView on ImageView. code...
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Apr 18, 2010
Let me know how to set up a background image in opengl. You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscribe@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
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Oct 29, 2009
ListView Question! I know it's possible change the row color, but it's possible to put some imagem on background? And if yes, it's possible to create an imagem 1px and repeat-x or repeat-y like CSS?
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Mar 29, 2010
I want have an image and i want to set it as a background of android list view. i have used android:background="drawable/image" but nothing happened. how to achieve this?
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Apr 28, 2010
I am developing a live Wallpaper on android 2.1
I want to set in background a bitmap that i download on a server. I use canvas with the method setBitmap(Bitmap bitmap); but it don't work. I also try to set it in an ImageView in a different class of my live Wallpaper but it also don't work.
Have you got a solution?
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Oct 2, 2010
I have a background image about 100 x 100 that I want to center in an Android app. Is there a way to do this?
I'm thinking it would greatly help with orientation changes for simple apps.
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Feb 2, 2010
I have an image that I want to place on the background on my activity. For the G1 I would use a background of 320x480 but with the nexus 1 the resolution is almost double that. Should I just place the large image and make the smaller phones size down? I am trying to keep the size of my package down as much as possible.
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Nov 20, 2010
I want to set Image background for linearlyout in android ? can i ? if yes. how ?
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Oct 6, 2010
I have a RelativeLayout with a tiled background. Is there a way to make a tween animation to fade out the existing image and fade in a new one?
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Sep 6, 2010
I created a custom background image and wanted to use it as the background for a layout that has height of wrap_content. However, the total height of the contents of within that layout are much less than the height of the background image.
When I set it as the background in XML via android:background="@drawable/image", I noticed that it displays the entire height of the image, although the height of the actual contents are much shorter.
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May 6, 2010
I'm trying to set my root LinearLayout element (which is set to fill_parent in both dimensions) to have a background image which is always located in the lower left corner of the screen no matter the orientation of the device. It would be excellent if there were some way to set the background image position such as that which you can do with css using "background-position: left bottom;" but I'm not seeing a way to achieve this in Android. Is there a way to do this?
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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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Jul 22, 2010
Using theme or ImageView ?
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Jun 8, 2010
I have been trying to use a ScrollView on a single ImageView with a JPG (~770 x 1024) over an AVD that's 600x800.
My main.xml is code...
It is important for me to avoid stretching the image. I can not use FIT_XY for ScaleType.
What is the recommended way to implement a display of a page that can be potentially scrolled?
Do I have to do it manually with a plain layout and scrolling upon GestureDetector.OnScroll events?
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Feb 12, 2009
I need to draw a background of 320 x 480 (fullscreen) for a OpenGL game. What I did was to stretch the texture to 512 x 512 and mapped it to 320,480 quad and then drew the rest of the game elements. I tried changing the texture image to 256x256 and no noticeable improvement in speed. Game was horribly slow even on the real device. It is actually slower on the device than on the emulator... I think i am the first one to have such a situation.. I am drawing a max of 12 triangles only 2 for background and rest are 64 x 64 textures. on 5 quad made with 10 triangles. I have disabled Depth, Lighting already. Only blending enabled as I use transparent PNG for texture of sprites. render cycle is like this - draw the background - draw the sprites (only 5) [with 10 triangles only] - swapbuffer... Please don't advice me to use 2d canvas, bitmap etc... I need to do it in OpenGL only. don't think OpenGL ES 1.0 is so incapable that it can't give me atleast 25-30 fps with just 12 triangles which you one 256x256 texture and one 64x64 textures (used by 5 quads...
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Nov 15, 2010
I am trying to fill an image onto my screen, but it is just covering around 75-80% part of whole screen, not whole screen.
The codeblock i am using is as:
CODE:...........................
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Nov 18, 2009
we are designing the page and we need to change background image dynamically.Is there any way to load(or change) android application background image dynamically?help me from come out this problem?
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Apr 30, 2010
I am developing an android application where I need to manipulate the background image of the rows in listview on certain conditions. Initially when the listview is loaded all works properly. But when I scroll down to the listview and come up again the background image changes. Can someone tell me the reason why its happening so? Hope to get the reply soon.
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