Question

Can anyone please help me in getting the camerapreview frame data without clicking the camara click. I want to get the currect camera data with out clicking the camera button

Answer 1

I guess you are searching for this function in the Camera class,

   public final void setPreviewCallback (Camera.PreviewCallback cb)

Define the callback

private PreviewCallback mPreviewCallback = new PreviewCallback() {
      public void onPreviewFrame(byte[] data, Camera camera) {
     }
}

Once the preview is started this callback will get triggered on each frame, the data (byte[]) are in the preview format, which you can find while setting the Camera Parameters

First get a list of supported preview formats

List<Integer> Camera.Parameters.getSupportedPreviewFormats()

the default format is ImageFormat.NV21

If you want to change the preview format use this function, choose a format from the available formats

Camera.Parameters.setPreviewFormat(int pixel_format)