Develop Reference

Qr and bar code scanner doesn't support portrait mode

I downloaded the project for qr and bar code scanner from git hub and facing difficulty in changing scanner from landscape mode to portrait mode and i checked many stackoverflow links but didn't get proper solution and i am using zxing 2.1 jar in my code.Here is my code please check the code and please do some helpful to solve this problem.Thanks in advance!!
Error:"java.lang.IllegalArgumentException: Crop rectangle does not fit within image data."
//BarcodeReader
package com.dynamsoft.barcodereader;
import android.app.Activity;
import android.os.Bundle;
import android.view.Display;
import android.widget.FrameLayout;
public class BarcodeReader extends Activity {
private CameraPreview mPreview;
private CameraManager mCameraManager;
private HoverView mHoverView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Display display = getWindowManager().getDefaultDisplay();
mHoverView = (HoverView)findViewById(R.id.hover_view);
mHoverView.update(display.getWidth(), display.getHeight());
mCameraManager = new CameraManager(this);
mPreview = new CameraPreview(this, mCameraManager.getCamera());
mPreview.setArea(mHoverView.getHoverLeft(), mHoverView.getHoverTop(), mHoverView.getHoverAreaWidth(), display.getWidth());
FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
preview.addView(mPreview);
getActionBar().hide();
}
#Override
protected void onPause() {
super.onPause();
mPreview.onPause();
mCameraManager.onPause();
}
#Override
protected void onResume() {
// TODO Auto-generated method stub
super.onResume();
mCameraManager.onResume();
mPreview.setCamera(mCameraManager.getCamera());
}
}
//CameraManager .java
package com.dynamsoft.barcodereader;
import android.content.Context;
import android.hardware.Camera;
import android.widget.Toast;
public class CameraManager {
private Camera mCamera;
private Context mContext;
public CameraManager(Context context) {
mContext = context;
// Create an instance of Camera
mCamera = getCameraInstance();
}
public Camera getCamera() {
return mCamera;
}
private void releaseCamera() {
if (mCamera != null) {
mCamera.release(); // release the camera for other applications
mCamera = null;
}
}
public void onPause() {
releaseCamera();
}
public void onResume() {
if (mCamera == null) {
mCamera = getCameraInstance();
}
Toast.makeText(
mContext,
"preview size = "
+ mCamera.getParameters().getPreviewSize().width + ", "
+ mCamera.getParameters().getPreviewSize().height,
Toast.LENGTH_LONG).show();
}
/** A safe way to get an instance of the Camera object. */
private static Camera getCameraInstance() {
Camera c = null;
try {
c = Camera.open(); // attempt to get a Camera instance
} catch (Exception e) {
// Camera is not available (in use or does not exist)
}
return c; // returns null if camera is unavailable
}
}
//HoverView .java
package com.dynamsoft.barcodereader;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.View;
public class HoverView extends View {
private Paint mPaint;
private int mLeft, mTop, mRight, mBottom;
public HoverView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
mPaint = new Paint();
mPaint.setColor(Color.RED);
mPaint.setStyle(Paint.Style.STROKE);
}
public void update(int width, int height) {
int centerX = width / 2;
int centerY = height / 2;
mLeft = centerX - 200;
mRight = centerX + 200;
mTop = centerY - 200;
mBottom = centerY + 200;
invalidate();
}
public int getHoverLeft() {
return mLeft;
}
public int getHoverTop() {
return mTop;
}
public int getHoverAreaWidth() {
return mRight - mLeft;
}
#Override
protected void onDraw(Canvas canvas) {
// TODO Auto-generated method stub
super.onDraw(canvas);
canvas.drawRect(mLeft, mTop, mRight, mBottom, mPaint);
}
}
//CameraPreview.java
package com.dynamsoft.barcodereader;
import java.io.IOException;
import android.app.AlertDialog;
import android.content.Context;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.PreviewCallback;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.LuminanceSource;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.NotFoundException;
import com.google.zxing.PlanarYUVLuminanceSource;
import com.google.zxing.Result;
import com.google.zxing.common.HybridBinarizer;
public class CameraPreview extends SurfaceView implements
SurfaceHolder.Callback {
private SurfaceHolder mHolder;
private Camera mCamera;
private static final String TAG = "camera";
private int mWidth, mHeight;
private Context mContext;
private MultiFormatReader mMultiFormatReader;
private AlertDialog mDialog;
private int mLeft, mTop, mAreaWidth, mAreaHeight;
public CameraPreview(Context context, Camera camera) {
super(context);
mCamera = camera;
mContext = context;
mHolder = getHolder();
mHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
Parameters params = mCamera.getParameters();
mWidth = 640;
mHeight = 480;
params.setPreviewSize(mWidth, mHeight);
mCamera.setParameters(params);
mMultiFormatReader = new MultiFormatReader();
mDialog = new AlertDialog.Builder(mContext).create();
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
} catch (IOException e) {
Log.d(TAG, "Error setting camera preview: " + e.getMessage());
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
if (mHolder.getSurface() == null) {
return;
}
try {
mCamera.stopPreview();
} catch (Exception e) {
}
try {
mCamera.setPreviewCallback(mPreviewCallback);
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
} catch (Exception e) {
Log.d(TAG, "Error starting camera preview: " + e.getMessage());
}
}
public void setCamera(Camera camera) {
mCamera = camera;
}
public void onPause() {
if (mCamera != null) {
mCamera.setPreviewCallback(null);
mCamera.stopPreview();
}
}
private Camera.PreviewCallback mPreviewCallback = new PreviewCallback() {
#Override
public void onPreviewFrame(byte[] data, Camera camera) {
// TODO Auto-generated method stub
if (mDialog.isShowing())
return;
LuminanceSource source = new PlanarYUVLuminanceSource(data, mWidth,
mHeight, mLeft, mTop, mAreaWidth, mAreaHeight, false);
BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
Result result;
try {
result = mMultiFormatReader.decode(bitmap, null);
if (result != null) {
mDialog.setTitle("Result");
mDialog.setMessage(result.getText());
mDialog.show();
}
} catch (NotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
public void setArea(int left, int top, int areaWidth, int width) {
double ratio = width / mWidth;
mLeft = (int) (left / (ratio + 1));
mTop = (int) (top / (ratio + 1));
mAreaHeight = mAreaWidth = mWidth - mLeft * 2;
}
}

It does not work on portrait mode. You need to limit your barcode activity to landscape mode.
<activity
android:name=".BarcodeReader"
android:screenOrientation="landscape" />

Create on click focus on CameraSource - Android QR Code detection

I'm developing an android app which allows user to check a QR Code content and execute something according read result.
In order to improve the performance i'd like to implement 2 methods:
onClickFocus (which allows user to focus the camera when screen is clicked)
turnOn/OFF flash (which allows user to turn on/off the flash)
I've done some digging and figured out that for manage camera and flash I need to be able to manage the Camera as object itself.
And here is where the nightmare begin.
I'm using the follow code to show camera result and track QR codes.
import android.app.FragmentTransaction;
import android.content.Context;
import android.os.Bundle;
import android.os.Vibrator;
import android.support.v4.widget.DrawerLayout;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.util.SparseArray;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.TextView;
import com.google.android.gms.vision.Detector;
import com.google.android.gms.vision.barcode.Barcode;
import com.google.android.gms.vision.barcode.BarcodeDetector;
import java.io.IOException;
public class MainReadActivity extends AppCompatActivity {
public SurfaceView cameraView;
private TextView barcodeInfo;
public BarcodeDetector barcodeDetector;
public CameraSource cameraSource;
public Vibrator v;
public String textInfo;
public DrawerLayout mDrawerLayout;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main_read);
v = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
mDrawerLayout = (DrawerLayout) findViewById(R.id.drawer_layout_main);
getSupportFragmentManager().findFragmentById(R.id.drawer_layout_main);
cameraView = (SurfaceView) findViewById(R.id.camera_view);
//barcodeInfo = (TextView) findViewById(R.id.code_info);
barcodeDetector = new BarcodeDetector.Builder(this)
.setBarcodeFormats(Barcode.QR_CODE)
.build();
cameraSource = new CameraSource.Builder(this, barcodeDetector).build();
cameraView.getHolder().addCallback(new SurfaceHolder.Callback() {
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
cameraSource.start(cameraView.getHolder());
} catch (IOException ie) {
Log.e("CAMERA SOURCE", ie.getMessage());
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
cameraSource.stop();
}
});
barcodeDetector.setProcessor(new Detector.Processor<Barcode>() {
#Override
public void release() {
}
#Override
public void receiveDetections(Detector.Detections<Barcode> detections) {
final SparseArray<Barcode> barcodes = detections.getDetectedItems();
if (barcodes.size() != 0) {
new Runnable() { // Use the post method of the TextView
public void run() {
v.vibrate(500);
// textInfo = barcodes.valueAt(0).displayValue;
MyFragmentDialog newf = new MyFragmentDialog();
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.replace(R.id.fragment_container, newf);
transaction.addToBackStack("tag");
transaction.commit();
}
};
}
}
});
}
public void onBackPressed() {
// do nothing
}
}
So, I need to get access to Camera, from CameraSource (am I right?!)
Once it is not possible, I tryed to use this CameraSource class from GoogleSamples's git which allows to use setFocusMode method... But unfortunately I wasn't successful.
I also tryed to use API 21, since API 22 no longer supports Camera and CameraPreferences.
I'm pretty sure this is not only my problem, but couldn't find a way to fix it.
Anyone can help?
FIXED:
Just use this CameraSource (github.com/googlesamples/android-vision/blob/master/visionSamples/barcode-reader/app/src/main/java/com/google/android/gms/samples/vision/barcodereader/ui/camera/CameraSource.java) . Yeah, I know, I've suggested it... But this time i fixed my problem! So, if you're going to use this, make sure your compile looks like this:
compile 'com.google.android.gms:play-services:8.1.0'

Initialize these and define them in OnCreate
Camera.Parameters params;
Camera camera;
CameraSource cameraSource;
SurfaceView cameraView;
boolean isFlash = false;
Call changeFlashStatus() method to turn flash ON and call it again to turn flash OFF
public void changeFlashStatus() {
Field[] declaredFields = CameraSource.class.getDeclaredFields();
for (Field field : declaredFields) {
if (field.getType() == Camera.class) {
field.setAccessible(true);
try {
camera = (Camera) field.get(cameraSource);
if (camera != null) {
params = camera.getParameters();
if (!isFlash) {
params.setFlashMode(Camera.Parameters.FLASH_MODE_TORCH);
flashImage.setColorFilter(getResources().getColor(R.color.yellow));
isFlash = true;
} else {
params.setFlashMode(Camera.Parameters.FLASH_MODE_OFF);
flashImage.setColorFilter(getResources().getColor(R.color.greyLight));
isFlash = false;
}
camera.setParameters(params);
}
} catch (IllegalAccessException e) {
e.printStackTrace();
}
break;
}
}
}
To get the camera to focus, you need a specific area ( Rect ) to pass it to Camera to make focus on that area. So we have to implement onTouchListener() for surfaceView so when we touch the surfaceView we create MotionEvent which is determine where exactly you touch the surfaceView then we can extract Rect from MotionEvent.
Call initCameraFocusListener() in your OnCreate. Safely Call it after the start of the Camera
private void initCameraFocusListener() {
cameraView.setOnTouchListener(new View.OnTouchListener() {
#Override
public boolean onTouch(View v, MotionEvent event) {
cameraFocus(event, cameraSource, Camera.Parameters.FOCUS_MODE_AUTO);
return false;
}
});
}
private boolean cameraFocus(MotionEvent event, #NonNull CameraSource cameraSource, #NonNull String focusMode) {
Field[] declaredFields = CameraSource.class.getDeclaredFields();
int pointerId = event.getPointerId(0);
int pointerIndex = event.findPointerIndex(pointerId);
// Get the pointer's current position
float x = event.getX(pointerIndex);
float y = event.getY(pointerIndex);
float touchMajor = event.getTouchMajor();
float touchMinor = event.getTouchMinor();
Rect touchRect = new Rect((int)(x - touchMajor / 2), (int)(y - touchMinor / 2), (int)(x + touchMajor / 2), (int)(y + touchMinor / 2));
Rect focusArea = new Rect();
focusArea.set(touchRect.left * 2000 / cameraView.getWidth() - 1000,
touchRect.top * 2000 / cameraView.getHeight() - 1000,
touchRect.right * 2000 / cameraView.getWidth() - 1000,
touchRect.bottom * 2000 / cameraView.getHeight() - 1000);
// Submit focus area to camera
ArrayList<Camera.Area> focusAreas = new ArrayList<Camera.Area>();
focusAreas.add(new Camera.Area(focusArea, 1000));
for (Field field : declaredFields) {
if (field.getType() == Camera.class) {
field.setAccessible(true);
try {
camera = (Camera) field.get(cameraSource);
if (camera != null) {
params = camera.getParameters();
params.setFocusMode(focusMode);
params.setFocusAreas(focusAreas);
camera.setParameters(params);
// Start the autofocus operation
camera.autoFocus(new Camera.AutoFocusCallback() {
#Override
public void onAutoFocus(boolean b, Camera camera) {
// currently set to auto-focus on single touch
}
});
return true;
}
return false;
} catch (IllegalAccessException e) {
e.printStackTrace();
}
break;
}
}
return false;
}

I use this library and it works really well, and its easy to implement
https://github.com/dm77/barcodescanner

Answered here: Google Vision API Samples: Get the CameraSource to Focus
To autofocus use
.setAutoFocusEnabled(true) on your CameraSource.Builder()

Simultaneous TextureView and SurfaceView Android Camera

I can display a preview of the camera video properly with a TextureView:
package com.example.camerasurfacetexture;
import java.io.IOException;
import android.app.Activity;
import android.graphics.SurfaceTexture;
import android.hardware.Camera;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.TextureView;
import android.view.TextureView.SurfaceTextureListener;
import android.widget.FrameLayout;
public class MainActivity extends Activity implements SurfaceTextureListener
{
private Camera mCamera = null;
private TextureView mTextureView = null;
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
mTextureView = new TextureView(this);
mTextureView.setSurfaceTextureListener(this);
setContentView(mTextureView);
}
#Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width,
int height)
{
Log.i("onSurfaceTextureAvailable", "onSurfaceTextureAvailable");
mCamera = Camera.open();
Camera.Size previewSize = mCamera.getParameters().getPreviewSize();
mTextureView.setLayoutParams(new FrameLayout.LayoutParams(
previewSize.width, previewSize.height, Gravity.CENTER));
try
{
mCamera.setPreviewTexture(surface);
}
catch (IOException t)
{
}
mCamera.startPreview();
}
#Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width,
int height)
{
// Ignored, the Camera does all the work for us
}
#Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface)
{
Log.i("onSurfaceTextureDestroyed", "onSurfaceTextureDestroyed");
mCamera.stopPreview();
mCamera.release();
return true;
}
#Override
public void onSurfaceTextureUpdated(SurfaceTexture surface)
{
// Update your view here!
}
}
and with a SurfaceView:
package com.example.cameratest;
import android.app.Activity;
import android.hardware.Camera;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.Toast;
public class MainActivity extends Activity
{
private SurfaceView preview = null;
private SurfaceHolder previewHolder = null;
private Camera camera = null;
private boolean inPreview = false;
private boolean cameraConfigured = false;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
preview = (SurfaceView) findViewById(R.id.cpPreview);
previewHolder = preview.getHolder();
previewHolder.addCallback(surfaceCallback);
previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
#Override
public void onResume()
{
super.onResume();
camera = Camera.open();
startPreview();
}
#Override
public void onPause()
{
if (inPreview)
{
camera.stopPreview();
}
camera.release();
camera = null;
inPreview = false;
super.onPause();
}
private Camera.Size getBestPreviewSize(int width, int height,
Camera.Parameters parameters)
{
Camera.Size result = null;
for (Camera.Size size : parameters.getSupportedPreviewSizes())
{
if (size.width <= width && size.height <= height)
{
if (result == null)
{
result = size;
}
else
{
int resultArea = result.width * result.height;
int newArea = size.width * size.height;
if (newArea > resultArea)
{
result = size;
}
}
}
}
return (result);
}
private void initPreview(int width, int height)
{
if (camera != null && previewHolder.getSurface() != null)
{
try
{
camera.setPreviewDisplay(previewHolder);
}
catch (Throwable t)
{
Log.e("PreviewDemo-surfaceCallback",
"Exception in setPreviewDisplay()", t);
Toast.makeText(MainActivity.this, t.getMessage(),
Toast.LENGTH_LONG).show();
}
if (!cameraConfigured)
{
Camera.Parameters parameters = camera.getParameters();
Camera.Size size = getBestPreviewSize(width, height, parameters);
if (size != null)
{
parameters.setPreviewSize(size.width, size.height);
camera.setParameters(parameters);
cameraConfigured = true;
}
}
}
}
private void startPreview()
{
if (cameraConfigured && camera != null)
{
camera.startPreview();
inPreview = true;
}
}
SurfaceHolder.Callback surfaceCallback = new SurfaceHolder.Callback()
{
public void surfaceCreated(SurfaceHolder holder)
{
// no-op -- wait until surfaceChanged()
}
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height)
{
initPreview(width, height);
startPreview();
}
public void surfaceDestroyed(SurfaceHolder holder)
{
// no-op
}
};
}
but if I try to do both at the same time:
package com.example.multiplecamerapreviewtest;
import java.io.IOException;
import android.app.Activity;
import android.graphics.SurfaceTexture;
import android.hardware.Camera;
import android.os.Bundle;
import android.util.Log;
import android.view.Gravity;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.TextureView;
import android.view.TextureView.SurfaceTextureListener;
import android.widget.FrameLayout;
import android.widget.Toast;
public class MainActivity extends Activity implements SurfaceTextureListener
{
private SurfaceView svPreview = null;
private SurfaceHolder previewHolder = null;
private Camera mCamera = null;
private boolean inPreview = false;
private boolean cameraConfigured = false;
private TextureView tvPreview = null;
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
svPreview = (SurfaceView) findViewById(R.id.svPreview);
previewHolder = svPreview.getHolder();
previewHolder.addCallback(surfaceCallback);
previewHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
// mTextureView = new TextureView(this);
tvPreview = (TextureView) findViewById(R.id.tvPreview);
tvPreview.setSurfaceTextureListener(this);
// setContentView(mTextureView);
}
#Override
public void onResume()
{
super.onResume();
mCamera = Camera.open();
startPreview();
}
#Override
public void onPause()
{
if (inPreview)
{
mCamera.stopPreview();
}
mCamera.release();
mCamera = null;
inPreview = false;
super.onPause();
}
private Camera.Size getBestPreviewSize(int width, int height,
Camera.Parameters parameters)
{
Camera.Size result = null;
for (Camera.Size size : parameters.getSupportedPreviewSizes())
{
if (size.width <= width && size.height <= height)
{
if (result == null)
{
result = size;
}
else
{
int resultArea = result.width * result.height;
int newArea = size.width * size.height;
if (newArea > resultArea)
{
result = size;
}
}
}
}
return (result);
}
private void initPreview(int width, int height)
{
if (mCamera != null && previewHolder.getSurface() != null)
{
try
{
mCamera.setPreviewDisplay(previewHolder);
}
catch (Throwable t)
{
Log.e("PreviewDemo-surfaceCallback",
"Exception in setPreviewDisplay()", t);
Toast.makeText(MainActivity.this, t.getMessage(),
Toast.LENGTH_LONG).show();
}
if (!cameraConfigured)
{
Camera.Parameters parameters = mCamera.getParameters();
Camera.Size size = getBestPreviewSize(width, height, parameters);
if (size != null)
{
parameters.setPreviewSize(size.width, size.height);
mCamera.setParameters(parameters);
cameraConfigured = true;
}
}
}
}
private void startPreview()
{
if (cameraConfigured && mCamera != null)
{
mCamera.startPreview();
inPreview = true;
}
}
SurfaceHolder.Callback surfaceCallback = new SurfaceHolder.Callback()
{
public void surfaceCreated(SurfaceHolder holder)
{
// no-op -- wait until surfaceChanged()
}
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height)
{
initPreview(width, height);
startPreview();
}
public void surfaceDestroyed(SurfaceHolder holder)
{
// no-op
}
};
#Override
public void onSurfaceTextureAvailable(SurfaceTexture surface, int width,
int height)
{
Log.i("onSurfaceTextureAvailable", "onSurfaceTextureAvailable");
mCamera = Camera.open();
Camera.Size previewSize = mCamera.getParameters().getPreviewSize();
tvPreview.setLayoutParams(new FrameLayout.LayoutParams(
previewSize.width, previewSize.height, Gravity.CENTER));
try
{
mCamera.setPreviewTexture(surface);
}
catch (IOException t)
{
}
mCamera.startPreview();
}
#Override
public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width,
int height)
{
// Ignored, the Camera does all the work for us
}
#Override
public boolean onSurfaceTextureDestroyed(SurfaceTexture surface)
{
Log.i("onSurfaceTextureDestroyed", "onSurfaceTextureDestroyed");
mCamera.stopPreview();
mCamera.release();
return true;
}
#Override
public void onSurfaceTextureUpdated(SurfaceTexture surface)
{
// Update your view here!
}
}
I get a "Fail to connect to camera service" exception when calling mCamera.setPreviewTexture().
According to the documentation (http://developer.android.com/reference/android/hardware/Camera.html#setPreviewDisplay%28android.view.SurfaceHolder%29), this is the expected behavior:
setPreviewDisplay()
Setting a preview surface will un-set any preview surface texture that was set via setPreviewTexture(SurfaceTexture).
(and vice-versa). Is there anything I can do to get these both displaying at the same time?

Send the Camera output to a SurfaceTexture, then render the texture wherever you like using GLES.
See e.g. the "texture from camera" activity in Grafika.
This requires some EGL management and a basic familiarity with GLES, though you can get pretty far just using the code in Grafika. This approach will get you much better performance than manipulating pixels with the NDK, because the GPU does all the work.

Camera is a shared hardware resource. I don't think you can access it (Camera.open()) more than once even within the same application i.e even within the same process with same user id. How about accessing the buffers for camera preview natively and then reading bytes from those buffers to render them on as many TextureViews or SurfaceViews or VideoViews as you wish?
Edited:
NDK Resource:
How do I get the raw Android camera buffer in C using JNI?

Make a SurfaceView larger than the screen (Fitting a camera preview to a SurfaceView larger than the display)

I have a custom camera application and I want for any preview sizes to display it in full screen mode without stretching the camera preview image.
For this, I need to make the surfaceView larger than the screen in order to keep aspect ratio, so actually the user will see less than camera actually captures.
For some reason, I cannot make the SurfaceView larger than the screen size.
What I've tried so far:
resize camera preview in surfaceChanged method
resize camera preview in on onMeasure method
resize it in in onLayout method
adding FLAG_LAYOUT_NO_LIMITS to activity - info
adding android:clipChildren for the surface view - info
setting width in xml: android:layout_width="852px"
getWindow().setLayout(852, 1280); in activity
but without any success - the behaviour is the same each time: it appears ok for 1 second and after that it gets stretched.
Here is the code:
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
private static final int CAMERA_ROTATE_ANGLE = 90;
private SurfaceHolder cameraHolder;
private Camera androidHardCamera;
private Context context;
public CameraPreview(Context context) {
super(context);
this.context = context;
// Install a SurfaceHolder.Callback so we get notified when the
// underlying surface is created and destroyed.
cameraHolder = getHolder();
cameraHolder.addCallback(this);
// deprecated setting, but required on Android versions prior to 3.0
cameraHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
public void setCamera(Camera camera) {
this.androidHardCamera = camera;
if (androidHardCamera != null) {
requestLayout();
}
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
// The Surface has been created, now tell the camera where to draw the preview.
try {
if (androidHardCamera != null) {
androidHardCamera.stopPreview();//this is needed for devices with API level < 14 (from doc.: Starting
// from API level 14, this method, aka setDisplayOrientation, can be called when preview is active.)
androidHardCamera.setDisplayOrientation(CAMERA_ROTATE_ANGLE);//force the preview Display Orientation
// to Portrait (rotate camera orientation/display to portrait)
//holder.setFixedSize(852, 1280);
androidHardCamera.setPreviewDisplay(holder);
androidHardCamera.startPreview();
}
} catch (IOException e) {
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
// If your preview can change or rotate, take care of those events here.
// Make sure to stop the preview before resizing or reformatting it.
if (cameraHolder.getSurface() == null) {
// preview surface does not exist
return;
}
// stop preview before making changes
try {
androidHardCamera.stopPreview();
} catch (Exception e) {
// ignore: tried to stop a non-existent preview
}
// set preview size and make any resize, rotate or
// reformatting changes here
FrameLayout.LayoutParams layoutParams = (FrameLayout.LayoutParams) this.getLayoutParams();
layoutParams.height = 1280;
layoutParams.width = 852;
this.setLayoutParams(layoutParams);
//cameraHolder.setFixedSize(852, 1280);
requestLayout();
// start preview with new settings
try {
androidHardCamera.setPreviewDisplay(cameraHolder);
androidHardCamera.startPreview();
} catch (Exception e) {
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
// #Override
// protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
// // super.onMeasure(widthMeasureSpec, heightMeasureSpec); //To change body of overridden methods use File | Settings | File Templates.
// //super.onMeasure(852, 1280);
// setMeasuredDimension(852, 1280);
// }
}
public class MyActivity extends Activity{
private Camera camera;
private CameraPreview previewCamera;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS);
setContentView(R.layout.camera_screen);
previewCamera = new CameraPreview(this);
FrameLayout preview = (FrameLayout) findViewById(R.id.camera_preview);
preview.addView(previewCamera);
//getWindow().setLayout(852, 1280);
}
#Override
protected void onResume() {
// Create an instance of Camera
camera = getCameraInstance(1);
if (camera == null) {
Toast.makeText(this, "Camera in use!", Toast.LENGTH_LONG).show();
} else {
previewCamera.setCamera(camera);
camera.stopPreview();
Camera.Parameters p = camera.getParameters();
p.setPreviewSize(176, 144);
// p.setPreviewSize(480, 800);
camera.setParameters(p);
startPreviewCamera();
}
super.onResume();
}
#Override
protected void onPause() {
releaseCameraAndPreview();
super.onPause();
}
public Camera getCameraInstance(int cameraInstance) {
Camera c = null;
try {
c = Camera.open(cameraInstance);
} catch (Exception e) {
// Camera is not available (in use or does not exist)
System.out.println("exception: " + e);
}
return c;
}
public void startPreviewCamera() {
//Force the preview Display Orientation to Portrait (rotate camera orientation/display to portrait)
camera.setDisplayOrientation(90);
camera.startPreview();
}
public void releaseCameraAndPreview() {
if (camera != null) {
camera.stopPreview(); // updating the preview surface
camera.setPreviewCallback(null);
// camera.lock(); //if we don't lock the camera, release() will fail on some devices
camera.release();
camera = null;
}
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- This is the container for the camera preview screen -->
<FrameLayout android:id="#+id/camera_preview"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:clipChildren="false"
android:layout_weight="1"/>
</LinearLayout>
Here is the entire project: https://www.dropbox.com/sh/96jih9kw5zmmnzy/z7VX16T30M
I am testing on a S3 device. On a S2 device seems to wok fine... I just do not know what to do more to solve this issue...
UPDATE 1
For example Sony Xperia has a screen display of 480 / 854.
One of the preview sizes I can use is 176 / 144.
In order to display full screen size I need to have the preview camera size of 698 / 854 - but I do not know how to set this value and where.
The code below is not working... the camera preview is stretched/elongated.
import android.app.Activity;
import android.graphics.Point;
import android.hardware.Camera;
import android.os.Bundle;
import android.view.Display;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.widget.FrameLayout;
import android.widget.LinearLayout;
public class CameraPreview extends Activity implements Preview.PreviewListener {
private Preview mPreview;
private Camera mCamera;
FrameLayout preview;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
// Create our Preview view and set it as the content of our activity.
mPreview = new Preview(this);
preview = (FrameLayout) findViewById(R.id.surface_camera);
preview.addView(mPreview);
Display display = getWindowManager().getDefaultDisplay();
getDisplaySize(display);
}
private static Point getDisplaySize(final Display display) {
final Point point = new Point();
try {
display.getSize(point);
} catch (java.lang.NoSuchMethodError ignore) {
point.x = display.getWidth();
point.y = display.getHeight();
}
System.out.println("============: Screen " + point.x + "/" + point.y);
return point;
}
#Override
protected void onResume() {
super.onResume();
mCamera = Camera.open(1);
mPreview.setCamera(mCamera, this);
}
#Override
protected void onPause() {
super.onPause();
if (mCamera != null) {
mPreview.setCamera(null, null);
mCamera.release();
mCamera = null;
}
}
#Override
public void onSurfaceChanged() {
LinearLayout.LayoutParams params = (LinearLayout.LayoutParams) preview.getLayoutParams();
params.setMargins(0, -218, 0, 0);
preview.setLayoutParams(new FrameLayout.LayoutParams(480, 854));
preview.setLayoutParams(params);
preview.setVisibility(View.VISIBLE);
}
}
import android.content.Context;
import android.hardware.Camera;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import java.io.IOException;
import java.util.List;
class Preview extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder mHolder;
private Camera mCamera;
private PreviewListener listener;
public static interface PreviewListener {
void onSurfaceChanged();
}
Preview(Context context) {
super(context);
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
public void setCamera(Camera camera, PreviewListener listener) {
this.listener = listener;
mCamera = camera;
if (mCamera != null) {
List<Camera.Size> mSupportedPreviewSizes = mCamera.getParameters().getSupportedPreviewSizes();
for (Camera.Size s : mSupportedPreviewSizes) {
System.out.println("============: " + s.width + "/" + s.height);
}
requestLayout();
}
}
public void surfaceCreated(SurfaceHolder holder) {
// The Surface has been created, acquire the camera and tell it where
// to draw.
try {
if (mCamera != null) {
mCamera.setPreviewDisplay(holder);
}
} catch (IOException exception) {
Log.e("Error: ", "IOException caused by setPreviewDisplay()", exception);
}
}
public void surfaceDestroyed(SurfaceHolder holder) {
// Surface will be destroyed when we return, so stop the preview.
if (mCamera != null) {
mCamera.stopPreview();
}
}
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
mCamera.stopPreview(); // pe Xpedia daca nu pui asta crapa la setDisplayOrientation
// Now that the size is known, set up the camera parameters and beginthe preview.
Camera.Parameters parameters = mCamera.getParameters();
mCamera.setDisplayOrientation(90);
parameters.setPreviewSize(176, 144);
requestLayout();
mCamera.setParameters(parameters);
mCamera.startPreview();
}
// #Override
// protected void onSizeChanged(\int w, int h, int oldw, int oldh) {
// super.onSizeChanged(w, h, oldw, oldh);
// //setLayoutParams(new LayoutParams((int)RATIO * w, w));
//
// FrameLayout.LayoutParams params = (FrameLayout.LayoutParams) getLayoutParams();
// setLayoutParams(new FrameLayout.LayoutParams(960, 1280));
// params.setMargins(0, -120, 0,0);
// setLayoutParams(params);
//
// //preview.setVisibility(View.VISIBLE);
// }
#Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec); //To change body of overridden methods use File | Settings | File Templates.
// FrameLayout.LayoutParams params = (FrameLayout.LayoutParams) getLayoutParams();
// setLayoutParams(new FrameLayout.LayoutParams(698, 854));
// params.setMargins(0, -218, 0,0);
// setLayoutParams(params);
}
//https://stackoverflow.com/questions/11853297/change-size-of-android-custom-surfaceview
#Override
public void onLayout(boolean changed, int left, int top, int right, int bottom) {
if (changed) {
//setLayoutParams();
listener.onSurfaceChanged();
//(this).layout(0, 0, viewWidth , viewHeight);
}
}
}
This is a class test which calculates the correct surface view size based on display screen size and camera preview size:
public class Test {
/**
* Determine proper width to be used for surface view in order to not stretch the camera live preview.
*/
public static void main(String[] args) {
// camera preview size:
int surfaceViewWidth = 176;
int surfaceViewHeight = 144;
int holder;
if (surfaceViewWidth > surfaceViewHeight) {
holder = surfaceViewWidth;
surfaceViewWidth = surfaceViewHeight;
surfaceViewHeight = holder;
}
//device screen display sizes:
int width = 480;
int height = 854;
double sc1 = (double) width / surfaceViewWidth;
double sc2 = (double) height / surfaceViewHeight;
double rez;
if (sc1 > sc2) {
rez = sc1;
} else {
rez = sc2;
}
System.out.println("Width/height: " + (int) (surfaceViewWidth * rez) + "/" + (int) (surfaceViewHeight * rez)); // size of the preview size we need to set
System.out.println(((int) (surfaceViewWidth * rez))-width); // difference between preview size and device screen size = whit how much is bigger the preview size than screen size
}
}

First, remove source of crashes: startPreviewCamera called in onResume.
Camera preview shall be started in SurfaceHolder.Callback methods.
Then you should know that you can set preview size only to sizes reported by Camera.Parameters.getSupportedPreviewSizes. And these sizes will most likely be smaller or equal to device's screen size.
Then you simply call
Camera.Parameters p = camera.getParameters();
p.setPreviewSize(w, h); // one of supported sizes
camera.setParameters(p);
Then Surface of preview will have that size (possibly rotated and w/h swapped). And this surface will be rescaled by Android to size of your CameraPreview view when being drawn, so it's also important how you set size of your CameraPreview.
You can set fixed size of your CameraPreview simply by calling
previewCamera.setLayoutParams(new FrameLayout.LayoutParams(w, h));
So in short, you set requested preview size in Camera.setParameters, and you size your preview view as desired, possibly to same size as preview, as is your requirement. Your preview view then may be equal to screen size or be smaller (assuming camera doesn't provide preview bigger than screen). If camera provides bigger preview than screen, you can still call preview.setX, preview.setY to move it around.

Android + OpenCV + Face detection + Custom Layout

I am using:
Android 4.0.3
OpenCV 2.4.2
Samsung Galaxy S2
The face-detection example (from the opencv 2.4.2) is working perfectly.
But now, I would like to create a custom layout and actually work with just the data extracted from face detection and build a game on it. Not necessarily having the FdView surface taking the entire screen.
I have done these modifications below, but just a black screen is displayed. Nothing appears on the screen.
Added a fd.xml layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<org.opencv.samples.fd.FdView android:id="#+id/FdView"
android:layout_width="640dp"
android:layout_height="480dp"
android:visibility="visible"
/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#FF0000"
android:text="hi"/>
Modified the baseLoaderCallback of FdActivity.java:
private BaseLoaderCallback mOpenCVCallBack = new BaseLoaderCallback(this) {
#Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i(TAG, "OpenCV loaded successfully");
// Load native libs after OpenCV initialization
System.loadLibrary("detection_based_tracker");
//EXPERIMENT
setContentView(R.layout.fd);
FdView surface = (FdView) (findViewById(R.id.FdView));
surface = mView;
// Create and set View
mView = new FdView(mAppContext);
mView.setDetectorType(mDetectorType);
mView.setMinFaceSize(0.2f);
//setContentView(mView);
// Check native OpenCV camera
if( !mView.openCamera() ) {
AlertDialog ad = new AlertDialog.Builder(mAppContext).create();
ad.setCancelable(false); // This blocks the 'BACK' button
ad.setMessage("Fatal error: can't open camera!");
ad.setButton("OK", new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
finish();
}
});
ad.show();
}
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
Added constructors in FdView.java:
public FdView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public FdView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}
Added constructors in SampleCvViewBase.java:
public SampleCvViewBase(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
// TODO Auto-generated constructor stub
}
public SampleCvViewBase(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
}

I have precisely the same issue. Also trying to figure it out. I'm trying to display the image on a SurfaceView that doesn't take the whole screen. And with that I read that you can't have your Camera handler class and linked SurfaceView in different classes. So smashed everything into one.
So, at the moment I have the camera displaying on the SurfaceView, and copying the frame data to a mFrame variable. Basically just struggling to get the mFrame processed (in the multi-threading, Run(), function) and showing the result on the SurfaceView.
This is the code I have, if you think it would help: (excuse the formatting as my code is also a work in progress)
package org.opencv.samples.tutorial3;
import java.io.IOException;
import java.util.List;
import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.ImageFormat;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.RectF;
import android.hardware.Camera;
import android.hardware.Camera.PreviewCallback;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.Window;
import android.widget.TextView;
public class Sample3Native extends Activity implements SurfaceHolder.Callback,Runnable{
//Camera variables
private Camera cam;
private boolean previewing = false;
private SurfaceHolder mHolder;
private SurfaceView mViewer;
private int mFrameWidth;
private int mFrameHeight;
private byte[] mFrame;
private boolean mThreadRun;
private byte[] mBuffer;
Sample3View viewclass;
TextView text;
int value = 0;
//==========
int framecount = 0;
private BaseLoaderCallback mOpenCVCallBack = new BaseLoaderCallback(this) {
#Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
// Load native library after(!) OpenCV initialization
System.loadLibrary("native_sample");
//constructor for viewclass that works on frames
viewclass = new Sample3View();
//setContentView(mView);
//OpenCam();
//setContentView(R.layout.main);
// Create and set View
CameraConstruct();
Camopen();
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
public Sample3Native()
{}
#Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.main);
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_2, this, mOpenCVCallBack);
}
//Camera construction
public void CameraConstruct()
{
mViewer = (SurfaceView)findViewById(R.id.camera_view);
text = (TextView)findViewById(R.id.text);
mHolder = mViewer.getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
//calls camera screen setup when screen surface changes
public void surfaceChanged(SurfaceHolder holder, int format, int width,int height)
{
CamStartDisplay();
}
public void Camclose()
{
if(cam != null && previewing)
{
cam.setPreviewCallback(null);
cam.stopPreview();
cam.release();
cam = null;
previewing = false;
}
mThreadRun = false;
viewclass.PreviewStopped();
}
//only open camera, and get frame data
public void Camopen()
{
if(!previewing){
cam = Camera.open();
//rotate display
cam.setDisplayOrientation(90);
if (cam != null)
{
//copy viewed frame
cam.setPreviewCallbackWithBuffer(new PreviewCallback()
{
public void onPreviewFrame(byte[] data, Camera camera)
{
synchronized (this)
{
System.arraycopy(data, 0, mFrame, 0, data.length);
this.notify();
}
//text.setText(Integer.toString(value++));
camera.addCallbackBuffer(mBuffer);
}
});
}
}//if not previewing
}
//start preview
public void CamStartDisplay()
{
synchronized (this)
{
if(cam != null)
{
//stop previewing till after settings is changed
if(previewing == true)
{
cam.stopPreview();
previewing = false;
}
Camera.Parameters p = cam.getParameters();
for(Camera.Size s : p.getSupportedPreviewSizes())
{
p.setPreviewSize(s.width, s.height);
mFrameWidth = s.width;
mFrameHeight = s.height;
break;
}
p.setPreviewSize(mFrameWidth, mFrameHeight);
List<String> FocusModes = p.getSupportedFocusModes();
if (FocusModes.contains(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO))
{
p.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
}
cam.setParameters(p);
//set the width and height for processing
viewclass.setFrame(mFrameWidth, mFrameHeight);
int size = mFrameWidth*mFrameHeight;
size = size * ImageFormat.getBitsPerPixel(p.getPreviewFormat()) / 8;
mBuffer = new byte[size];
mFrame = new byte [size];
cam.addCallbackBuffer(mBuffer);
viewclass.PreviewStarted(mFrameWidth, mFrameHeight);
//start display streaming
try
{
//cam.setPreviewDisplay(null);
cam.setPreviewDisplay(mHolder);
cam.startPreview();
previewing = true;
}
catch (IOException e)
{
e.printStackTrace();
}
}//end of if cam != null
}//synchronising
}
//thread gets started when the screen surface is created
public void surfaceCreated(SurfaceHolder holder) {
//Camopen();
//CamStartDisplay();
(new Thread(this)).start();
}
//called when the screen surface is stopped
public void surfaceDestroyed(SurfaceHolder holder)
{
Camclose();
}
//this is function that is run by thread
public void run()
{
mThreadRun = true;
while (mThreadRun)
{
//text.setText(Integer.toString(value++));
Bitmap bmp = null;
synchronized (this)
{
try
{
this.wait();
bmp = viewclass.processFrame(mFrame);
}
catch (InterruptedException e) {}
}
if (bmp != null)
{
Canvas canvas = mHolder.lockCanvas();
if (canvas != null)
{
canvas.drawBitmap(bmp, (canvas.getWidth() - mFrameWidth) / 2, (canvas.getHeight() - mFrameHeight) / 2, null);
mHolder.unlockCanvasAndPost(canvas);
}
}//if bmp != null
}// while thread in run
}
}//end class
Sample3View as used in this class just includes the processFrame function as such:
package org.opencv.samples.tutorial3;
import android.content.Context;
import android.graphics.Bitmap;
import android.widget.TextView;
class Sample3View {
private int mFrameSize;
private Bitmap mBitmap;
private int[] mRGBA;
private int frameWidth;
private int frameHeight;
private int count = 0;
Sample3Native samp;
//constructor
public Sample3View()
{
}
public void setFrame(int width,int height)
{
frameWidth = width;
frameHeight = height;
}
public void PreviewStarted(int previewWidtd, int previewHeight) {
mFrameSize = previewWidtd * previewHeight;
mRGBA = new int[mFrameSize];
mBitmap = Bitmap.createBitmap(previewWidtd, previewHeight, Bitmap.Config.ARGB_8888);
}
public void PreviewStopped() {
if(mBitmap != null) {
mBitmap.recycle();
mBitmap = null;
}
mRGBA = null;
}
public Bitmap processFrame(byte[] data) {
int[] rgba = mRGBA;
FindFeatures(frameWidth, frameHeight, data, rgba);
Bitmap bmp = mBitmap;
bmp.setPixels(rgba, 0, frameWidth, 0, 0, frameWidth, frameHeight);
//samp.setValue(count++);
return bmp;
}
public native void FindFeatures(int width, int height, byte yuv[], int[] rgba);
}
So yeah, hope this helps. If I get the complete solution working, I'll post that also. Also post your stuff if you get the solution first please! Enjoy

Sry not a real answer (yet) but also tried to make a custom layout in opencv 2.4.2
i have this perfectly working solution for 2.4.0 if i remember it right it was enough to add the instructors.. but it doesn't work with 2.4.2
i'll try to figure smthg out and let you guys know.

I met the same problem that I wanted to create a custom view using layout. OpenCV 2.4.2 seems not to offer this function.
OpenCV 2.4.3 has the function, but its tutorial doesn't say so (it uses the old example from OpenCV2.4.2). Its Android samples provide some insights. Finally I found the instruction in OpenCV 2.4.9 documentation.
Hope it helps.

Hah, I figured out one way. You could just simply separate the OpenCV Loader and the custom layout.
Define BaseLoaderCallback mOpenCVCallBack.
private BaseLoaderCallback mOpenCVCallBack = new BaseLoaderCallback(this) {
#Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS: {
Log.i(TAG, "OpenCV loaded successfully");
// Load native library after(!) OpenCV initialization
System.loadLibrary("native_sample");
}
break;
default: {
super.onManagerConnected(status);
}
break;
}
}
};
In OnCreat, build your custom layout, load the OpenCv Loader,
public void onCreate(Bundle savedInstanceState) {
Log.i(TAG, "onCreate");
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
// /////////////////////////////////////////////////////////////////////
// // begin:
// // Create and set View
setContentView(R.layout.main);
mView = (Sample3View) findViewById(R.id.sample3view);
mcameraButton = (ImageView) findViewById(R.id.cameraButton);
if (!OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_2, this, mOpenCVCallBack)) {
Log.e(TAG, "Cannot connect to OpenCV Manager");
}
}
Just that!
I did that, and it worked very well.