I use the following statement to copy an image from the assets to the gallery app, which works fine:
MediaStore.Images.Media.insertImage(getContentResolver(), myBitmap, myTitle , myDescription);
The images are png-files with a transparent background. They are displayed correctly when I load them from the assets to, for example an ImageView.
The problem is, that the formerly transparent background of the imported images became solid black in the gallery.
The png is a png24 created by gimp. I also tried a transparent gif and a png with transparency added by Apple's preview application with the same result.
Why it happens?
I know this is an old question but I just had the same problem. The problem is that MediaStore.Images.Media.insertImage stores the file with a MIME_TYPE of "image/jpeg", and jpeg doesn't support transparency.
One solution is to make your own content provider that uses another image format. The Picasso image library might be worth a look too.
Related
I am working on a project in which I am using a lot of images. My friend has designed all the images in photoshop and all those images are of my required size.
But the problem is that when my friend exported those images from the photoshop, he exported those images with a transparent background and that transparent background with the image makes the frame size bigger than required. And when I set that image to some ImageView, it expands to the whole screen due to its bigger frame size.
Now my question is that Is there a way to set image in imageview so that the transparent part is automatically ignored and the image of my required size just sets into the imageview. Or It is required to crop those images in photoshop and then use those images.
I am sorry if someone couldn't understand the question but I can elaborate if asked.
The way I would do it would be just edit them in photoshop, but I found another way if you want to look into it. Its called webP and you can check it out here. With this you can skip the transparency, but I think the size would stay the same, You can try it out if you want though.
Hope this helps!
I have one big image named panel_bck.jpg to use in different resolutions to decrease apk size. The image format is JPG and it's size is 1.9MB. I put it to default drawable folder only. But when I set the background in code, the BitmapFactory can't find the image at
drawable/panel_bck.jpg
and the result is all black background. I tested this case with other images(PNG files, JPG files) and there is no problem with them. Only question is that a limitation exist for the drawable size or what is the problem? How can I solve this?
If your image very big resoulation you will set drawable-xxhdpi directory only.
I had a problem like yours trying to maka a big image fit into a too small ImageView and I fixed my problem by using this line in the layout xml file:
android:adjustViewBounds="true"
I don't know if it can ba applied to an activity background though.
You should use 9patch image. You can create 9patch image by using the tool called draw9patch located in sdk/tools. First create a large resolution image and give to draw9patch it will create a 9patch image with extension .9.png add that image in drawable it will solve you problem.
See following links for detail
http://developer.android.com/tools/help/draw9patch.html
http://codesignature.com/how-to-design-9-patch-buttons-for-android-using-adobe-photoshop-for-all-pixel-densities-and-states/
I have a custom view where normally I was using .png files to draw onto in a canvas and that worked fine but now my requirements are to use .gif files and for some reason the same code will not work. Is there something specific about .gif files that doesnt allow android canvas objects to draw on bitmaps made from them?
Apparently you cannot draw on a canvas created from a .gif file. Once I was able to convert the .gif to .png I was able to draw on the canvas again.
Actually, I can draw GIF files on canvas, but all transparent colours turn into white! I assume it is just a bug, related to the new parameter inPremultiplied in Bitfactory.Options which probably was not tested properly.
I am really frustrated with that, since now I have to replace GIFs by PNG in all my previous applications. (Fixing the bug in the following version doesn't make any difference, since there will still be models, not supporting GIF transparency.)
Indeed GIF file has it own advantage. It doesn't support alpha or true colour, but it has transparent index which in many cases is what actually needed. If you want PNG files to be not crucially bigger in size than GIF (I assume this is the main reason for using GIF instead of PNG), convert PNG files from true color to index (colormap) format (most of graphic editor, including GIMP and Photoshop support that), which works OK with KitKat. You will still lose size, but no mare than 1%.
I have an application in which i am setting the background of an image view.
If i keep my images in the re/drawable(s) folder, everything works fine but if i keep the same images in the sdcard and load from there to set the background then the dimensions of the image are different.
A similar question had been asked earlier but it is still unanswered. Could anyone shed some light on this topic.
if we place the images in res/drawable(s) folder then android chooses the appropriate image according to target device and scaling is also done by system if required. So if you are putting a image in sdcard then system does not do any scaling on image.
My Problem: Only one image will actually load from the assets folder. I have all the images there and when I try to access any of them I don't get an error. By actually load I mean it shows the image on the screen. When I load the other images the whole screen comes up white.
In every instance I am loading the whole image to the whole screen.
If I were to put the image as a fourth its size in the middle of the screen then there is a white rectangle there. The image is supposedly in the .apk because I don't get an error for the game trying to find it. However if I were to load this one image then everything words fine.
The one image that works find is a .png image and I tried to load the others as a .png but it does not work.
Any advice on where to start?
I load the images through the AssetManager.readAsset() as an input stream and then use the bitmap factory to get the image as a bitmap. Afterwards I load the bitmap into open gl and draw the region I want. However, the problem is only my first image I ever started using works at the moment. Could there be something wrong with a file that eclipse generates?
Some png bug android.
Just try to open them and save them with gimp. Sometimes it solves the problem.
Finally found the solution.
Turns out that one image that worked had a bit depth of 32 and the other ones only had a 24 bit depth.
The solution is to open up the image in gimp, add an alpha channel (makes it 32 bit), and save it as a .png file. Then read the details and it should say it is 32 bit.
Thanks guy! :)
Also note that images have to be by power of 2. For example it needs to be 1024 by 1024.