Camera takes black picture

eyurdakul · by **eyurdakul** » Thu Mar 04, 2010 1:37 pm

Hi everybody,

i am trying to take a picture without preview and save it in the SD card. Everything works fine but the image is black. Here is my getImage function:

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Using java Syntax Highlighting

 
private void getImage(String string) {
 
                if(!isCamBusy){
 
                        isCamBusy = true;
 
                        mCamera = Camera.open();
 
                        cParams = mCamera.getParameters();
 
                        cParams.setPictureSize(320, 240);
 
                        cParams.setPictureFormat(PixelFormat.JPEG);
 
                        mCamera.setParameters(cParams);
 
                        ImageCaptureCallback iccb = new ImageCaptureCallback();
 
                        mCamera.takePicture(null, null, iccb);
 
                }
 
        }
 
        public class  ImageCaptureCallback implements PictureCallback{
 
             @Override
 
             public void onPictureTaken(byte[] data, Camera camera) {
 
                 try{
 
                         String dirpath = Environment.getExternalStorageDirectory().getAbsolutePath().concat("/1206");
 
                         Bitmap img = BitmapFactory.decodeByteArray(data, 0, data.length);
 
                         Random rgen = new Random();
 
                         int rnum = rgen.nextInt(10000);
 
                         String fname = rnum+".jpg";
 
                         File file = new File(dirpath, fname);
 
                         file.createNewFile();
 
                         fos = new FileOutputStream(file);
 
                         img.compress(CompressFormat.JPEG, 100, fos);
 
                         fos.flush();
 
                         fos.close();
 
                 }catch(Exception e){
 
                         e.printStackTrace();
 
                 }
 
                 camera.release();
 
                 isCamBusy = false;
 
             }
 
        };
 
Parsed in 0.035 seconds,  using GeSHi 1.0.8.4

Can anybody point me something. Thanks in advance, Ejder Yurdakul.

eyurdakul · by **eyurdakul** » Thu Mar 04, 2010 5:10 pm

Wel, it seems you get a black image with cupcake, if you don't use a preview. This works fine on emulator tough.
So the question is little changed. Now i have a broadcast receiver which starts a service after boot. This service should be able to take a picture without a preview. I've created a surface view with and surface holder listener but i can't get onsurfacecreated fired. Do i have to set this view as main view and focus. Do you have any suggestion or work around for this problem?

Camera takes black picture

Camera takes black picture

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