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" />

Not called surfaceCreated when add camera object in surface in new runOnUiThread

Sorry for my english. I have activity1, and activity2. In activity1 i have button, when i click this button this button freezes for a few seconds and after this open activity2. To remove a freeze when click button in activity1 I added code that launches the camera in new runOnUiThread but now not called surfaceCreated.
mPreview - my custom surfaceView
mCamera - object camera
My code:
new Thread(new Runnable() {
#Override
public void run() {
CameraActivity.this.runOnUiThread(new Runnable() {
#Override
public void run() {
mPreview.addCamera(mCamera);
mPreview.addParent(CameraActivity.this);
mCamera.getParameters().setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);
mPreview.refreshDrawableState();
mCamera.startPreview();
}
});
}
}).start();
My costom SurfaceView ( i add only important code)
public class CameraPreview extends SurfaceView implements SurfaceHolder.Callback {
public CameraPreview (Context context){
super(context);
}
public CameraPreview(Context context, AttributeSet attrs){
super(context, attrs);
}
public CameraPreview(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void addCamera(Camera camera){
mCamera = camera;
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
} catch (IOException e) {
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
try {
if(mCamera!=null){
mCamera.stopPreview();
mCamera.setPreviewCallback(null);
mCamera.release();
mCamera = null;
}
} catch (Exception e){
Toast.makeText(this.getContext(), e.getMessage(), Toast.LENGTH_LONG).show();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) {
//code
mCamera.startPreview();
}
}

That's the expected behaviour, the Surface is maintained by the SurfaceView, as a workaround you could check if the surface is valid and has non-0 dimentions and call your surfaceCreated/surfaceChangedfunctions manually
the code you need:
Surface surface = mHolder.getSurface();
if(surface != null && surface.isValid()){
Rect frame = mHolder.getSurfaceFrame();
if(frame.width() > 0 && frame.height() > 0){
surfaceCreated(mHolder);
surfaceChaged(mHolder, PixelFormat.OPAQUE, frame.width(), frame.height()); //pixel format OPAQUE is the default one
}
}

The application may be doing too much work on its main thread is catched when I try set surfaceview in center of FrameLayout

I have an activity which creates my custom SurfaceView for camera previewing in center of FrameLayout. In xml I have a FrameLayout with button and ImageView. When I click on button, I want ImageView shows over SurfaceView in center of FrameLayout. So when I run application I catch warning:
Skipped XX frames! The application may be doing too much work on its main thread
Here is my XML:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="com.rcd.perfecto.ui.CameraActivity">
<FrameLayout
android:id="#+id/fl_camera_preview"
android:layout_width="match_parent"
android:layout_height="match_parent">
<de.hdodenhof.circleimageview.CircleImageView
android:id="#+id/iv_avatar"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:visibility="gone"
android:src="#drawable/ic_launcher"/>
<Button
android:id="#+id/btn_photo_capture"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="#string/btn_photo_capture"
android:layout_gravity="center_horizontal|bottom"/>
</FrameLayout>
</LinearLayout>
Here is my custom SurfaceView
public class CameraView extends SurfaceView implements SurfaceHolder.Callback {
private Path mClipPath;
private Camera mCamera;
private WeakReference<FrameLayout> mFrameLayoutWeakReference;
private Context mContext;
private SurfaceHolder mHolder;
public CameraView(Context context) {
super(context);
init(context);
}
public CameraView(Context context, Camera camera, FrameLayout layout) {
super(context);
mCamera = camera;
mFrameLayoutWeakReference = new WeakReference<FrameLayout>(layout);
mHolder = getHolder();
mHolder.addCallback(this);
init(context);
}
public CameraView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public CameraView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context);
}
#TargetApi(Build.VERSION_CODES.LOLLIPOP)
public CameraView(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
super(context, attrs, defStyleAttr, defStyleRes);
init(context);
}
private void init(Context context) {
mContext = context;
WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
Display display = manager.getDefaultDisplay();
Point size = new Point();
display.getSize(size);
float radius;
FrameLayout layout = mFrameLayoutWeakReference.get();
if (display.getRotation() == Surface.ROTATION_0 || display.getRotation() == Surface.ROTATION_180) {
radius = layout.getWidth() / 2;
} else {
radius = layout.getHeight() / 2;
}
mClipPath = new Path();
mClipPath.addCircle(layout.getWidth() / 2, layout.getHeight() / 2, radius, Path.Direction.CW);
}
#Override
protected void dispatchDraw(Canvas canvas) {
canvas.clipPath(mClipPath);
super.dispatchDraw(canvas);
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
if (mHolder.getSurface() == null) {
return;
}
try {
mCamera.stopPreview();
} catch (Exception e) {
e.printStackTrace();
}
Camera.Parameters parameters = mCamera.getParameters();
Display display = ((WindowManager) mContext.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
if (display.getRotation() == Surface.ROTATION_0) {
parameters.setPreviewSize(height, width);
mCamera.setDisplayOrientation(90);
}
if (display.getRotation() == Surface.ROTATION_90) {
parameters.setPreviewSize(width, height);
}
if (display.getRotation() == Surface.ROTATION_180) {
parameters.setPreviewSize(height, width);
}
if (display.getRotation() == Surface.ROTATION_270) {
parameters.setPreviewSize(width, height);
mCamera.setDisplayOrientation(180);
}
try {
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
} catch (IOException e) {
e.printStackTrace();
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
}
}
And my activity:
public class CameraActivity extends AppCompatActivity {
#Bind(R.id.btn_photo_capture) Button mPhotoCaptureButton;
#Bind(R.id.fl_camera_preview) FrameLayout mCameraPreviewFrameLayout;
#Bind(R.id.iv_avatar) CircleImageView mAvatarImageView;
private Camera mCamera;
private CameraView mCameraView;
public CameraActivity() {
}
#OnClick(R.id.btn_photo_capture)
void takePicture() {
if (mAvatarImageView.getVisibility() == View.VISIBLE) {
mAvatarImageView.setVisibility(View.GONE);
} else {
mAvatarImageView.setVisibility(View.VISIBLE);
}
}
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_camera);
ButterKnife.bind(this);
if (checkCameraHardware()) {
if (Camera.getNumberOfCameras() > 1) {
mCamera = getCameraInstance(Camera.CameraInfo.CAMERA_FACING_FRONT);
} else mCamera = getCameraInstance();
}
ViewTreeObserver observer = mCameraPreviewFrameLayout.getViewTreeObserver();
observer.addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
#Override
public void onGlobalLayout() {
mCameraView = new CameraView(CameraActivity.this, mCamera, mCameraPreviewFrameLayout);
mCameraPreviewFrameLayout.addView(mCameraView, 0);
}
});
}
private static Camera getCameraInstance() {
Camera c = null;
try {
c = Camera.open();
} catch (Exception e) {
e.printStackTrace();
}
return c;
}
private static Camera getCameraInstance(int id) {
Camera c = null;
try {
c = Camera.open(id);
} catch (Exception e) {
e.printStackTrace();
}
return c;
}
private boolean checkCameraHardware() {
return getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA);
}
}
So my question is how can I avoid warning above or is there another way to set surfaceview in center of FrameLayout programmatically?

Android Camera Preview not showing properly on google glass?

I am developing a camera app and the problem is that the camera i am making shows a distorted preview.
The picture it takes is clear but the preview is messed up.
Complete camera preview code is below just in case:
import java.io.IOException;
import java.util.List;
import com.glass.cuxtomcam.constants.CuxtomIntent.CAMERA_MODE;
import android.content.Context;
import android.content.res.Configuration;
import android.hardware.Camera;
import android.hardware.Camera.CameraInfo;
import android.hardware.Camera.OnZoomChangeListener;
import android.hardware.Camera.Parameters;
import android.util.Log;
import android.view.OrientationEventListener;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.Toast;
public class CameraPreview extends SurfaceView implements
SurfaceHolder.Callback, OnZoomChangeListener {
private SurfaceHolder mHolder;
private Camera mCamera;
private Context mContext;
private static String TAG = "CAMERA PREVIEW";
private int zoomOffset;
private CameraListener mCallback;
private int cameraMode;
public CameraPreview(Context context, Camera camera, int cameraMode) {
super(context);
mContext = context;
mCamera = camera;
mHolder = getHolder();
this.cameraMode = cameraMode;
mHolder.addCallback(this);
mHolder.setKeepScreenOn(true);
}
public void setCameraListener(CameraListener listener) {
mCallback = listener;
}
#Override
public synchronized 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 (mHolder.getSurface() == null) {
// preview surface does not exist
return;
}
}
#Override
public void surfaceCreated(SurfaceHolder holder) {
if (mCamera != null) {
try {
mCamera.stopPreview();
if (mCamera.getParameters().isZoomSupported()) {
mCamera.setZoomChangeListener(this);
zoomOffset = mCamera.getParameters().getMaxZoom() / 5;
}
mCamera.setPreviewDisplay(holder);
mCamera.startPreview();
mCamera.lock();
} catch (IOException e) {
Log.e("Error starting preview", e.getMessage());
}
}
}
#Override
public void surfaceDestroyed(SurfaceHolder holder) {
if (mCamera != null) {
mCamera.stopPreview();
// release the camera
mCamera.release();
// unbind the camera from this object
mCamera = null;
}
}
public synchronized void zoomIn() {
if (mCamera != null && mCamera.getParameters().isZoomSupported()
&& mCamera.getParameters().isSmoothZoomSupported()) {
int zoomvalue = mCamera.getParameters().getZoom() + zoomOffset;
if (zoomvalue <= mCamera.getParameters().getMaxZoom()) {
mCamera.startSmoothZoom(zoomvalue);
}
} else {
Toast.makeText(mContext, "Zoom In is not supported",
Toast.LENGTH_LONG).show();
}
}
public synchronized void zoomOut() {
if (mCamera != null && mCamera.getParameters().isZoomSupported()
&& mCamera.getParameters().isSmoothZoomSupported()) {
int zoomvalue = mCamera.getParameters().getZoom() - zoomOffset;
if (zoomvalue >= 0) {
mCamera.startSmoothZoom(zoomvalue);
}
} else {
Toast.makeText(mContext, "Zoom Out is not supported",
Toast.LENGTH_LONG).show();
}
}
#Override
public void onZoomChange(int zoomValue, boolean stopped, Camera camera) {
// Log.i("Camera Zoom Value", zoomValue + "");
}
}
Can anyone guide me on why is this happening?

Not sure if it is still relevant (after 2 months without an answer). But this is a solution I used when my camera was like you showed.
Camera.Parameters parameters = camera.getParameters();
parameters.setPreviewFpsRange(30000, 30000);
parameters.setPreviewSize(640,360);
camera.setParameters(parameters);
It sets the frames per second to 30fps, the problem you are experiencing is a too high framerate (most likely)

How to use camera live feed as a activity background?

I am trying to make an App in which I need to use camera live feed as a background. (I know its a stupid thing to do but can't help, its a client demand).
I have tried doing it using SurfaceView but no success so far.
So far whatever I found on Stack Overflow are more of a guesses or directions how to do it but no real time examples or code help is out there. It would be great if someone who has done this before share a piece of code with Stack Overflow users like me.

Take a look here:
http://developer.android.com/guide/topics/media/camera.html
There is all the code you need to make an activity which shows the camera preview.

package com.example.CameraPreview;
import android.content.Context;
import android.content.pm.PackageManager;
import android.hardware.Camera;
import android.util.AttributeSet;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import java.io.IOException;
public class CameraView extends SurfaceView implements SurfaceHolder.Callback {
private SurfaceHolder mHolder;
private Camera mCamera;
public CameraView(Context context) {
super(context);
if(checkCameraHardware(context)) {
mCamera = getCameraInstance();
}
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
public CameraView(Context context, AttributeSet attrs) {
super(context, attrs);
if(checkCameraHardware(context)) {
mCamera = getCameraInstance();
}
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
#Override
public void surfaceCreated(SurfaceHolder surfaceHolder) {
// The Surface has been created, now tell the camera where to draw the preview.
try {
mCamera.setPreviewDisplay(surfaceHolder);
mCamera.startPreview();
} catch (IOException e) {
Log.d("CameraView", "Error setting camera preview: " + e.getMessage());
}
}
#Override
public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i2, int i3) {
if (mHolder.getSurface() == null){
return;
}
try {
mCamera.stopPreview();
} catch (Exception e){
}
try {
mCamera.setPreviewDisplay(mHolder);
mCamera.startPreview();
} catch (Exception e){
Log.d("CameraView", "Error starting camera preview: " + e.getMessage());
}
}
#Override
public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
}
private boolean checkCameraHardware(Context context) {
if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA)){
return true;
} else {
return false;
}
}
public static Camera getCameraInstance(){
Camera c = null;
try {
c = Camera.open();
}
catch (Exception e){
}
return c;
}
}