Camera基础
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Building a Camera App
The general steps for creating a custom camera interface for your application are as follows:
- Detect and Access Camera - Create code to check for the existence of cameras and request access.
- Create a Preview Class - Create a camera preview class that extends
SurfaceView
and implements theSurfaceHolder
interface. This class previews the live images from the camera. - Build a Preview Layout - Once you have the camera preview class, create a view layout that incorporates the preview and the user interface controls you want.
- Setup Listeners for Capture - Connect listeners for your interface controls to start image or video capture in response to user actions, such as pressing a button.
- Capture and Save Files - Setup the code for capturing pictures or videos and saving the output.
- Release the Camera - After using the camera, your application must properly release it for use by other applications.
遇到的问题,启动后crash,发现oncreat都过了,后来才想到是因为权限问题,需要加上权限.
<uses-permission android:name="android.permission.CAMERA" />
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