Android自定义自定义Camera实现拍照功能实现拍照功能
主要为大家详细介绍了Android自定义Camera实现拍照功能，具有一定的参考价值，感兴趣的小伙伴们可以参考一
下
本文记录了用自定义Camera实现的简单拍照功能。
Camera类在5.0以后不推荐使用了，取而代之的是android.hardware.camera2包下的类，本文使用Camera。
我们首先自定义一个View去继承SurfaceView:
public class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback, Camera.AutoFocusCallback {
private SurfaceHolder mHolder;
private Camera mCamera;
private static final int ORIENTATION = 90;
private int mScreenWidth;
private int mScreenHeight;
private boolean isOpen;
public CameraSurfaceView(Context context, AttributeSet attrs) {
super(context, attrs);
getScreenMatrix(context);
mHolder = getHolder();
mHolder.addCallback(this);
mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
private void getScreenMatrix(Context context) {
WindowManager WM = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
DisplayMetrics outMetrics = new DisplayMetrics();
WM.getDefaultDisplay().getMetrics(outMetrics);
mScreenWidth = outMetrics.widthPixels;
mScreenHeight = outMetrics.heightPixels;
}
public void takePicture(Camera.ShutterCallback mShutterCallback, Camera.PictureCallback rawPictureCallback, Camera.PictureCallback jpegPictureCallback) {
if (mCamera != null)
mCamera.takePicture(mShutterCallback, rawPictureCallback, jpegPictureCallback);
}
public void startPreview() {
mCamera.startPreview();
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
if (!checkCameraHardware(getContext()))
return;
if (mCamera == null) {
isOpen = safeCameraOpen(Camera.CameraInfo.CAMERA_FACING_BACK);
}
if (!isOpen) {
return;
}
mCamera.setDisplayOrientation(ORIENTATION);
try {
mCamera.setPreviewDisplay(holder);
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
if (mCamera != null) {
setCameraParams(mScreenWidth, mScreenHeight);
mCamera.startPreview();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
releaseCameraAndPreview();
}
private boolean safeCameraOpen(int id) {
boolean qOpened = false;
try {
releaseCameraAndPreview();
mCamera = Camera.open(id);
qOpened = (mCamera != null);
} catch (Exception e) {
评论0