android-orientation

I'm trying to build a custom camera app. I have a class which extends SurfaceView for the camera preview. When the device changes orientation, this surface is destroyed and recreated, leading to a noticeable "glitch" which diminishes user experience. What I'd like to do is to prevent this camera preview from having to be recreated on orientation change. In addition, I'd like to have some buttons overlaying this preview (e.g. flash, choice of front/back camera etc.) which WOULD rotate on orientation change. This is similar to what the stock camera app does: Stock camera in landscape mode. Stock

I've noticed that onLayout and onSizeChanged get called twice in immediate succession after an orientation change, either from landscape->portrait or from portrait->landscape, when handling the configuration change from an Activity. Furthermore, the first onLayout/onSizeChanged contain the old dimensions (before the rotate), while the 2nd onLayout/onSizeChanged contain the new (correct) dimensions. Does anyone know why, and/or how to work around this? It seems like perhaps the screen size change happens quite some time after the configuration change - i.e., the dimensions are not correct

I'm new to Android development and was playing around with the camera. I just wanted to create a simple app that would take a photo using the native camera app and give me back the file path of that image. I have that working fine, but I've hit a strange error. When I tap the button to launch the camera, if I change the orientation of the screen while in the camera app, and don't switch back before I exit the camera (pressing the Done button when I'm asked if I want to retake or not), it causes a NullPointerException to be thrown. I'm at a bit of a loss here as to how to figure this one out,

What i want is, upon the device changes orientation, the top line on the screen when in Portrait remains the top line on screen in Landscape. And vice versa. As the width of the screen is likely to be different between Portrait and Landscape, the line width of the text, which means also the width of the TextView and the ScrollView , will vary. Thus, the line-wrap will be different in different screen configurations (Portrait vs. Landscape, large vs. small). The line-break will be at different position in different cases. There are three not-so-perfect solutions for your reference. Also