Android :: Convert View To Bitmap FileNotFoundException?
Sep 2, 2010
I'm trying to convert my LinearLayout to a bitmap so that I can save the current layout content as an image in SD card. First, I create bitmap and canvas and attach the layout to the canvas.
Followed steps from http://www.brighthub.com/mobile/google-android/articles/30676.aspx#comments.
Code to add child view into layout before creating bitmap:
CODE:............
When I press the save button, it should save the current layout as an image to SD card.
Here are my steps:
CODE:...............
It can create folder in SD card but no file created under this folder. It always gives me FileNotFoundException. I'm not sure it is the file creating problem or the screenBitmap problem.
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May 10, 2010
I will try to explain what exactly I need to do.
I have 3 separate screens say A,B,C. There is another screen called say HomeScreen where all the 3 screens bitmap should be displayed in Gallery view and the user can select in which view does he wants to go.
I have been able to get the Bitmaps of all the 3 screens and display it in Gallery view by placing all the code in HomeScreen Activity only. Now, this has complicated the code a lot and I will like to simplify it.
So, can I call another Activity from HomeScreen and do not display it and just get the Bitmap of that screen. For example, say I just call HomeScreen and it calls Activity A,B,C and none of the Activities from A,B,C are displayed. It just gives the Bitmap of that screen by getDrawingCache(). And then we can display those bitmaps in Gallery view in HomeScreen.
I hope I have explained the problem very clearly.
Please let me know if this is actually possible.
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Feb 28, 2010
How do I convert a Drawable into a Bitmap?
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Jun 4, 2009
I am trying to figure out how to do conversion of Picture object generated by web View to Bitmap for later JPEG encoding and saving to local f/s. I tried to create a bitmap from pre created Picture object by BitmapFactory.decode Stream and failed. Seems like Picture object is unrecognized format by Bitmap factory. Just wondering is there any method to do the conversion?
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Jul 30, 2010
I am new to this site, and I come with a question about Android.
Is there any way to convert a Bitmap to grayscale? I know how to draw a grayscale bitmap (using canvas operations: http://www.mail-archive.com/android-developers@googlegroups.com/msg38890.html) but I really need The actual bitmap in gray colors (or at least something that could be converted to a bitmap later on).
Do I have to implement it by hand (pixel by pixel operations)?
I've searched a lot, and still could not find. Anyone knows a easy/efficient way to do it?
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Mar 19, 2009
I want to store image in sqlite database. I tried to store it using BLOB and String, in both cases it store the image and can retrieve it but when i convert it to Bitmap using BitmapFactory.decodeByteArray(...) it return null. Below is my code please have a look and suggest me where i m making mistake.
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Aug 12, 2010
Does anyone know how to convert a bitmap to a byte array?
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May 29, 2009
I want to store pictures from the internet in my data base as byte arrays. I get the pictures as bitmaps, but can't find way to convert it to byte array.
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Mar 10, 2010
How can i convert a Bitmap image to Drawable.
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Sep 27, 2010
I have a problem in converting base64 string to bitmap in android. I am using the camera to fetch the image and i am convert the image to base64 string to post to the server. I want to show that image in the imageview so how can i show the image in the ImageView after fetching the image from the camera.
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Nov 3, 2010
For some reason, when I create a bitmap from an image in asset, it does not display fullscreen. When I take an image from drawable, resId, the image shows fullscreen. Why is this?
CODE:..........................
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Mar 10, 2010
How can i convert a Bitmap to Drawable.
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Jan 25, 2009
How do I get a bitmap of a webview? I think I can use the capturePicture but how do I then convert that picture object to a bitmap that I can clip and manipulate?
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Mar 24, 2010
I have a custom view which is drawing some bitmaps on screen. I want to scale the bitmaps depending on some sensor data. Can anyone suggest to me the best way (performance wise) to scale the bitmaps.
Right now I'm creating the bitmaps in the constructor of the view but if I start to scale it in the onDraw method I believe I'll just be re-drawing the bitmaps (Which will be a memory / cpu hog).
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Mar 6, 2009
Can anyone explain me the difference between View's Canvas and Bitmaps Canvas
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Oct 3, 2010
I have a view. I want to place a bitmap image as its background image. I was not able to do that.
My code is below...
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May 19, 2010
I'm creating 3GP videos with the Android - however, when the 3GP files are posted on a site, the same Android phone cannot view it back. (The file works on the iPhone).
What is right way to encode/resize the 3GP video so that the video player on Android can play it back?
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Oct 29, 2010
I'm trying to create a MapView in a service (live wallpaper), but have it hidden so that I can render it to a Bitmap, and then map it to a texture to render in opengl. I have a Canvas and a Bitmap, and I intended to call myMap.draw(myCanvas) in order to get it into the correct bitmap so that I could then bind it as a texture.
When I Initialize I do the following:
myMap = new MapView(ctx, APPSTATICS.MAP_API_KEY);
I get an error:
java.lang.RuntimeException: stub at com.google.android.maps.MapView.<init> (Unknown Source)
Why I can't create a new mapview which I can use to draw to a offscreen bitmap?
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Jun 4, 2010
Is it possible to convert a Button into a TextView onclick during runtime?
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Oct 14, 2010
I have an ImageView that contains a bitmap. Now the bitmap can change size within a known range. This makes the surrounding views to relocate which I want to prevent. I've tried setting margins and padding for the ImageView but without success.
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Jul 28, 2010
I'm trying to backport an android 1.6+ application to android 1.5.
Following the advice here...
http://comments.gmane.org/gmane.comp.handhelds.android.devel/97051
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... I have done the following:
Modify AndroidManifest.xml to set minSdkVersion to 3
Move all of my files that were previously in drawable-mdpi/ to drawable/
Rename drawable-hdpi/ to drawable-hdpi-v4/
It seems to me that this should ensure that 1.5 devices use the files in drawable/ while 1.6 and later devices use the files in drawable/ and drawable-hdpi-v4/ as appropriate. The drawable/ and drawable-hdpi-v4/ directories are the only drawable directories in my res folder.
However, after I compile, install, and run the resulting binary on the 1.5 emulator, I get the following error:
CODE:......
For reasons I don't understand, 1.5 devices are not able to see the bg.png image file, a version of which is in both the drawable/ and drawable-hdpi-v4/ directories.
Running the same binary works fine on 1.6.
Why won't 1.5 devices see my res/drawable/bg.png image with this setup?
As described in Providing screen resource compatibility for Android 1.5, I'm using Android SDK r6 and have put my mdpi resources in the drawable/ directory. Also, I've verified that the problem isn't isolated to bg.png. If I remove the reference to the broken drawable in my xml, the app breaks on the next and each subsequent graphic during setContentView().
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Feb 20, 2009
In the Android Market, I saw that users of my app had serious problems: http://www.cyrket.com/package/de.jars.android.quicksearch
After updating to a new version from the Market, the app became unusable. This line is causing the trouble:
code:..........
I do not see a reason for a FileNotFoundException here - is it a Android bug?
"/data/data" seems strange, too (should it not be just "/data"?).
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Sep 15, 2010
I am trying to download a file from the net and write it to the SD card. I have the WRITE_EXTERNAL_STORAGE permission enabled.
The code fails here:
CODE:..................
I am trying to write the file and it doesn't exists from before.
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Sep 7, 2010
If I pass http://www.ebay.com to this. Somewhere along the way ebay changes my url, perhaps a redirect. What's weird is Android java can't open the page. u = new URL(txturl.getText().toString());
I get the error below as it apparently opening the new mobile site. I'm just wonder at what point my url changes and If I somehow stop this. It does not appear to happen if I point to yahoo, google, amazon or other major sites. I just noticed this in my testing.
CODE:......................
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Jul 20, 2010
when I try to attach a file to an email, I get a java.io.FileNotFoundException: No content provider logcat output. If anyone could tell me what I am doing wrong or what I should do instead, that would be great.Thank you.
This is how I add the files to the email..:
CODE:...............
And here is the entire logcat error output:
CODE:..................
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Nov 16, 2010
I've got a custom view in which I need to draw two bitmaps, one is a background, representing the image of a map and one is a pin which will be drawn on top/left position in canvas.
The both images are drawn onDraw and remain the same during the live of the activity that contains the view. After a while I get a OutOfMemoryError: bitmap size exceeds
VM budget
This means that I have a leak and the bitmaps don't get garbage collected. I asked this question before, but now the situation changed a little. I made a init method where I set the bitmaps I want to use but this still isn't a good approach, the error appears later, but still there.
Here is the code:
public class MyMapView extends View
private int xPos = 0;
private int yPos = 0;
private int space = 0;
private Bitmap resizedBitmap;
private Bitmap position;
private Bitmap mapBitmap;
public void destroy()
resizedBitmap.recycle();
resizedBitmap=null;
position.recycle();
position=null;
mapBitmap.recycle();
mapBitmap=null;
I call the setMapBitmap() and init() on onCreate of the activity that contains the view. In there I know what bitmap will be used as map. onPause of the activity I call the destroy() of the view. I still get errors.
I've read this this but I don't know how to adapt it on my case
I AM OPEN TO ANY OTHER SOLUTION. Please note that I need to resize the map bitmap (based on the height of the layout that contains it in mai activity) and still be able to draw the position on correct place.
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Nov 11, 2010
I was wondering which resolution I should convert my videos to in order to be able to view them in full screen on the X8?
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Jul 21, 2010
I have a very large image and I only want to display a section the size of the display (no scaling), and the section should just be the center of the image. Because the image is very large I cannot read the entire image into memory and then crop it. This is what I have so far but it will give OutOfMemory for large images. Also I don't think inSampleSize applies because I want to crop the image, not lower the resolution.
Uri data = getIntent().getData();
Input Stream is = getContentResolver().openInputStream(data);
Bitmap bitmap = BitmapFactory.decodeStream(is, null, null);
Any help would be great?
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Apr 2, 2009
I am 1) taking a picture and 2) then draw another Bitmap on top of it 3) then I store it
I am doing it as follows and it works on the emulator.
On the device I get a OutOfMemoryError: bitmap size exceeds VM budget android.graphics.Bitmap.nativeCopy(Native Method) android.graphics.Bitmap.copy(Bitmap.java:199) in the line copy the Bitmap to get a mutable Bitmap.
CODE:...........
What I am asking:
a) Is there a better way to do what I am doing? 1) take a picture 2) draw another Bitmap on top of it 3) then I store it
b) What is the best way to create a mutable Bitmap from the picture I just took with the camera?
In my app, resolution is not an issue. If it works better for small photos that would be fine.
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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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