我试图用CvCameraViewListener2设置一个OpenCV摄像机，并用我的OpenCameraView设置一个单独的类。该应用程序正在运行，但是当相机接收帧时出现错误。
这是我的CameraActivity，我的自定义OpenCameraView和通过按钮启动Camera时出现的错误。很抱歉张贴了这么多代码，但我真的不知道此错误来自何处。
public class CameraActivity extends AppCompatActivity implements CvCameraViewListener2 {
private static final String TAG = CameraActivity.class.getSimpleName();
public static final String SCAN_IMAGE_LOCATION = Environment.getExternalStorageDirectory() + File.separator + "OpenScanner";
Context context;
OpenCameraView jcv;
Mat mRgba, des, forward, mGray; // mat1, mat2, mat3
Button picButton;
int mViewMode;
private BaseLoaderCallback baseLoaderCallback = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS: {
jcv.enableView();
picButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
String outPicture = SCAN_IMAGE_LOCATION + File.separator + generateFilename();
createDefaultFolder(SCAN_IMAGE_LOCATION);
jcv.takePicture(outPicture);
Toast.makeText(CameraActivity.this, "Picture has been taken ", Toast.LENGTH_LONG).show();
}
});
}
break;
default: {
super.onManagerConnected(status);
}
break;
}
}
};
@SuppressLint("ClickableViewAccessibility")
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.i(TAG, "called onCreate");
super.onCreate(savedInstanceState);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
setContentView(R.layout.activity_camera);
picButton = findViewById(R.id.picButton);
jcv = findViewById(R.id.camera_view);
//jcv.setVisibility(CameraBridgeViewBase.VISIBLE);
jcv.setCvCameraViewListener(this);
jcv.setFocusMode(context, 6);
jcv.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
if(jcv != null) {
}
return false;
}
});
}
@Override
public void onResume(){
super.onResume();
Log.d(TAG, "in onResume");
if (OpenCVLoader.initDebug()) {
Log.d(TAG, "OpenCV library found inside package. Using it!");
baseLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);
} else {
Log.d(TAG, "Internal OpenCV library not found. Using OpenCV Manager for initialization");
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_6, this, baseLoaderCallback);
}
}
@Override
public void onCameraViewStarted(int width, int height) {
Log.d(TAG, "in onCameraViewStarted");
mRgba = new Mat(height, width, CvType.CV_8UC4);
// mGray = new Mat(height, width, CvType.CV_8UC1);
// des = new Mat(height, width, CvType.CV_8UC4);
// forward = new Mat(height, width, CvType.CV_8UC4);
}
@Override
public Mat onCameraFrame(final CvCameraViewFrame inputFrame) {
Log.d(TAG, "in onCameraFrame");
mRgba = inputFrame.rgba();
//mGray = inputFrame.gray(); // grayscale required for detection
return mRgba;
}
// Nicht mehr ändern
@Override
public void onPause() {
super.onPause();
if (jcv != null) {
jcv.disableView();
}
}
// Nicht mehr ändern
@Override
public void onDestroy() {
super.onDestroy();
if (jcv != null)
jcv.disableView();
}
@Override
public void onCameraViewStopped() {
}
public static void createDefaultFolder(String dirPath){
File directory = new File(dirPath);
if(!directory.exists()){
directory.mkdir();
}
}
public static String generateFilename(){
@SuppressLint("SimpleDateFormat") SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss");
return "scan" + sdf.format(new Date()) + ".jpg";
}
}
public class OpenCameraView extends JavaCameraView implements Camera.PictureCallback {
private static final String TAG = OpenCameraView.class.getSimpleName();
private String mPictureFileName;
public OpenCameraView(Context context, AttributeSet attrs) {
super(context, attrs);
Log.d(TAG, "in OpenCameraView Constructor");
}
public void setFocusMode(Context item, int type) {
mCamera = Camera.open();
mCamera.startPreview();
Parameters params = mCamera.getParameters();
List<String> FocusModes = params.getSupportedFocusModes();
if(FocusModes != null && FocusModes.contains(Camera.Parameters.FOCUS_MODE_AUTO)) {
Log.d(TAG, "Phone supports autofocus :)");
}
else {
Log.d(TAG, "Phone does not support autofocus :(");
}
mCamera.cancelAutoFocus();
mCamera.autoFocus(new Camera.AutoFocusCallback() {
@Override
public void onAutoFocus(boolean b, Camera camera) {
}
});
switch (type) {
case 0:
if (FocusModes.contains(Parameters.FOCUS_MODE_AUTO))
params.setFocusMode(Parameters.FOCUS_MODE_AUTO);
else
Toast.makeText(item, "Auto Mode is not supported", Toast.LENGTH_SHORT).show();
break;
case 1:
if (FocusModes.contains(Parameters.FOCUS_MODE_CONTINUOUS_VIDEO))
params.setFocusMode(Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
else
Toast.makeText(item, "Continuous Mode is not supported", Toast.LENGTH_SHORT).show();
break;
case 2:
if (FocusModes.contains(Parameters.FOCUS_MODE_EDOF))
params.setFocusMode(Parameters.FOCUS_MODE_EDOF);
else
Toast.makeText(item, "EDOF Mode is not supported", Toast.LENGTH_SHORT).show();
break;
case 3:
if (FocusModes.contains(Parameters.FOCUS_MODE_FIXED))
params.setFocusMode(Parameters.FOCUS_MODE_FIXED);
else
Toast.makeText(item, "Fixed Mode is not supported", Toast.LENGTH_SHORT).show();
break;
case 4:
if (FocusModes.contains(Parameters.FOCUS_MODE_INFINITY))
params.setFocusMode(Parameters.FOCUS_MODE_INFINITY);
else
Toast.makeText(item, "Infinity Mode is not supported", Toast.LENGTH_SHORT).show();
break;
case 5:
if (FocusModes.contains(Parameters.FOCUS_MODE_MACRO))
params.setFocusMode(Parameters.FOCUS_MODE_MACRO);
else
Toast.makeText(item, "Macro Mode is not supported", Toast.LENGTH_SHORT).show();
break;
case 6:
if (FocusModes.contains(Parameters.FOCUS_MODE_CONTINUOUS_PICTURE))
params.setFocusMode((Parameters.FOCUS_MODE_CONTINUOUS_PICTURE));
else
Toast.makeText(item, "Continuous picture mode is not supported", Toast.LENGTH_SHORT).show();
break;
}
mCamera.setParameters(params);
}
public void takePicture(final String fileName) {
Log.i(TAG, "Taking picture");
this.mPictureFileName = fileName;
mCamera.setPreviewCallback(null);
mCamera.takePicture(null, null, this);
}
@SuppressLint("WrongThread")
@Override
public void onPictureTaken(byte[] data, Camera camera) {
Log.i(TAG, "Saving a bitmap to file");
// The camera preview was automatically stopped. Start it again.
mCamera.startPreview();
mCamera.setPreviewCallback(this);
Bitmap bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
Uri uri = Uri.parse(mPictureFileName);
Log.d(TAG, "selectedImage: " + uri);
Bitmap bm = null;
bm = rotate(bitmap, 90);
// Write the image in a file (in jpeg format)
try {
FileOutputStream fos = new FileOutputStream(mPictureFileName);
bm.compress(Bitmap.CompressFormat.JPEG, 80, fos);
fos.close();
} catch (java.io.IOException e) {
Log.e("PictureDemo", "Exception in photoCallback", e);
}
}
private static Bitmap rotate(Bitmap bm, int rotation) {
if (rotation != 0) {
Matrix matrix = new Matrix();
matrix.postRotate(rotation);
Bitmap bmOut = Bitmap.createBitmap(bm, 0, 0, bm.getWidth(), bm.getHeight(), matrix, true);
return bmOut;
}
return bm;
}
}
I/Timeline: Timeline: Activity_idle id: android.os.BinderProxy@6fec3c1 time:559599005
V/ActivityThread: updateVisibility : ActivityRecord{d2268f token=android.os.BinderProxy@8e64234 {com.example.myapplication/com.example.myapplication.MainActivity}} show : false
D/JavaCameraView: Preview Frame received. Frame size: 2332800
D/CameraActivity: in onCameraFrame
D/JavaCameraView: Preview Frame received. Frame size: 2332800
E/SurfaceHolder: Exception locking surface
java.lang.IllegalArgumentException
at android.view.Surface.nativeLockCanvas(Native Method)
at android.view.Surface.lockCanvas(Surface.java:267)
at android.view.SurfaceView$4.internalLockCanvas(SurfaceView.java:973)
at android.view.SurfaceView$4.lockCanvas(SurfaceView.java:941)
at org.opencv.android.CameraBridgeViewBase.deliverAndDrawFrame(CameraBridgeViewBase.java:410)
at org.opencv.android.JavaCameraView$CameraWorker.run(JavaCameraView.java:395)
at java.lang.Thread.run(Thread.java:818)
D/CameraActivity: in onCameraFrame
D/JavaCameraView: Preview Frame received. Frame size: 2332800
E/SurfaceHolder: Exception locking surface
java.lang.IllegalArgumentException
at android.view.Surface.nativeLockCanvas(Native Method)
at android.view.Surface.lockCanvas(Surface.java:267)
at android.view.SurfaceView$4.internalLockCanvas(SurfaceView.java:973)
at android.view.SurfaceView$4.lockCanvas(SurfaceView.java:941)
at org.opencv.android.CameraBridgeViewBase.deliverAndDrawFrame(CameraBridgeViewBase.java:410)
at org.opencv.android.JavaCameraView$CameraWorker.run(JavaCameraView.java:395)
at java.lang.Thread.run(Thread.java:818)
D/JavaCameraView: Preview Frame received. Frame size: 2332800
D/JavaCameraView: Preview Frame received. Frame size: 2332800
D/CameraActivity: in onCameraFrame
E/SurfaceHolder: Exception locking surface
java.lang.IllegalArgumentException
at android.view.Surface.nativeLockCanvas(Native Method)
at android.view.Surface.lockCanvas(Surface.java:267)
at android.view.SurfaceView$4.internalLockCanvas(SurfaceView.java:973)
at android.view.SurfaceView$4.lockCanvas(SurfaceView.java:941)
at org.opencv.android.CameraBridgeViewBase.deliverAndDrawFrame(CameraBridgeViewBase.java:410)
at org.opencv.android.JavaCameraView$CameraWorker.run(JavaCameraView.java:395)
at java.lang.Thread.run(Thread.java:818)