Android: take photo without preview: java.lang.RuntimeException: takePicture failed
I am getting java.lang.RuntimeException: takePicture could not be executed for the following Android code:
public class TakePicture {
Camera camera;
Parameters parameters;
Context context;
public TakePicture(Context context)
{
camera = Camera.open();
this.context=context;
parameters = camera.getParameters();
parameters.setPictureFormat(PixelFormat.JPEG);
camera.setParameters(parameters);
SurfaceView sview = new SurfaceView(context);
try {
camera.setPreviewDisplay(sview.getHolder());
camera.startPreview();
camera.takePicture(null,null,photoCallback);
} catch (IOException e) {
e.printStackTrace();
}
catch(Exception e)
{
e.printStackTrace();
}
}
PictureCallback photoCallback=new PictureCallback() {
public void onPictureTaken(byte[] data, Camera camera) {
//...
}
};
}
I just wanted to take a photo with the front camera without a preview and keep the afterword.
An instance of this class is created in the main activity with this code:
TakePicture tp = new TakePicture(this);
Do you have any suggestions to address this issue?
Thanks in advance!
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1 answer
Try this code.
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
//get the Image View at the main.xml file
iv_image = (ImageView) findViewById(R.id.imageView);
//get the Surface View at the main.xml file
sv = (SurfaceView) findViewById(R.id.surfaceView);
//Get a surface
sHolder = sv.getHolder();
//add the callback interface methods defined below as the Surface View callbacks
sHolder.addCallback(this);
//tells Android that this surface will have its data constantly replaced
sHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
@Override
public void surfaceChanged(SurfaceHolder arg0, int arg1, int arg2, int arg3)
{
//get camera parameters
parameters = mCamera.getParameters();
//set camera parameters
mCamera.setParameters(parameters);
mCamera.startPreview();
//sets what code should be executed after the picture is taken
Camera.PictureCallback mCall = new Camera.PictureCallback()
{
@Override
public void onPictureTaken(byte[] data, Camera camera)
{
//decode the data obtained by the camera into a Bitmap
bmp = BitmapFactory.decodeByteArray(data, 0, data.length);
//set the iv_image
iv_image.setImageBitmap(bmp);
}
};
mCamera.takePicture(null, null, mCall);
}
@Override
public void surfaceCreated(SurfaceHolder holder)
{
// The Surface has been created, acquire the camera and tell it where
// to draw the preview.
mCamera = Camera.open();
try {
mCamera.setPreviewDisplay(holder);
} catch (IOException exception) {
mCamera.release();
mCamera = null;
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder)
{
//stop the preview
mCamera.stopPreview();
//release the camera
mCamera.release();
//unbind the camera from this object
mCamera = null;
}
}
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