I need to set a preview for camera, to use it to scan a QR code, using Camera2 API. My problem is to configure camera. This is my code:
//setting the preview surface layout file <?xml version="1.0" encoding="utf-8"?> <SurfaceView android:layout_width="250dp" android:layout_height="250dp" android:id="@+id/surfaceView" android:layout_gravity="center" android:layout_centerVertical="true" android:layout_centerHorizontal="true" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:textAppearance="?android:attr/textAppearanceMedium" android:text="@string/scanqr" android:id="@+id/textView" android:gravity="center_horizontal" android:layout_above="@+id/surfaceView" android:layout_centerHorizontal="true" /> In code:
//After I get my CameraDevice... CameraCharacteristics caracteristicas=cManager.getCameraCharacteristics(chosenCam); StreamConfigurationMap map = caracteristicas.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP); Size[] mPreviewSize = map.getOutputSizes(WHAT TO PUT HERE); surfaceViewCamera = (SurfaceView)dCamera.findViewById(R.id.surfaceView); surfaceViewCamera.getHolder().addCallback(this); mPreviewRequestBuilder= cDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW); Surface surface=surfaceViewCamera.getHolder().getSurface(); mPreviewRequestBuilder.addTarget(surface); cDevice.createCaptureSession(Arrays.asList(surface), new CameraCaptureSession.StateCallback(){...onConfigured, onCaptureFailed and onConfigureFailed methods...} My problem is that I don't know how to configure properly the camera, as always enters the onConfigurationFailed method. Any help to do that? Someone knows any good specific tutorial about that topic?
Thank you.
EDIT:
No luck. My code now looks like this:
CameraCharacteristics caracteristicas=cManager.getCameraCharacteristics(chosenCam); StreamConfigurationMap map = caracteristicas.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP); Size[] mPreviewSize = map.getOutputSizes(ImageFormat.JPEG); iReader=ImageReader.newInstance(mPreviewSize[0].getWidth(), mPreviewSize[0].getHeight(),ImageFormat.JPEG, 1); iReader.setOnImageAvailableListener(new ImageReader.OnImageAvailableListener() { @Override public void onImageAvailable(ImageReader reader) { Log.i("TAG", "We have image. Yay!"); } }, backgroundHandler); I don't receive any exception, it only goes to onConfigurationFailed, and says:
06-29 08:20:50.377 1410-1410/my.package E/Legacy-CameraDevice-JNI： LegacyCameraDevice_nativeDetectSurfaceDimens: Could not retrieve native window from surface. 06-29 08:20:50.388 1410-1410/my.package W/CameraDevice-JV-0： Stream configuration failed 06-29 08:20:51.283 1410-1410/my.package E/CameraCaptureSession： Session 0: Failed to create capture session; configuration failed 06-29 08:21:12.179 1410-1410/my.package I/Choreographer： Skipped 26759 frames! The application may be doing too much work on its main thread. 06-29 08:21:13.424 1410-1416/my.package W/art： Suspending all threads took: 13.264ms 06-29 08:21:20.458 1410-1416/my.package W/art： Suspending all threads took: 12.178ms 06-29 08:21:24.481 1410-1416/my.package W/art： Suspending all threads took: 7.194ms 06-29 08:21:28.496 1410-1416/my.package W/art： Suspending all threads took: 5.281ms 06-29 08:21:34.031 1410-1416/my.package W/art： Suspending all threads took: 7.869ms 06-29 08:21:39.923 1410-1477/my.package I/OpenGLRenderer： Initialized EGL, version 1.4 06-29 08:21:39.989 1410-1477/my.package W/EGL_emulation： eglSurfaceAttrib not implemented 06-29 08:21:39.989 1410-1477/my.package W/OpenGLRenderer： Failed to set EGL_SWAP_BEHAVIOR on surface 0xb4ba9b60, error=EGL_SUCCESS PD: Im debugging with emulator, just in case it helps