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| public class CameraSurfaceView extends SurfaceView implements SurfaceHolder.Callback, CameraCallback {
private static final String TAG = CameraSurfaceView.class.getSimpleName();
SurfaceHolder mSurfaceHolder;
private Context mContext;
private Handler mHandler;
private boolean hasSurface;
private CameraManager mCameraManager;
private int mRatioWidth = 0;
private int mRatioHeight = 0;
private int mSurfaceWidth;
private int mSurfaceHeight;
public CameraSurfaceView(Context context) {
super(context);
init(context);
}
public CameraSurfaceView(Context context, AttributeSet attrs) {
super(context, attrs);
init(context);
}
public CameraSurfaceView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
init(context);
}
private void init(Context context) {
mContext = context;
mHandler = new Handler(context.getMainLooper());
mSurfaceHolder = getHolder();
mSurfaceHolder.setFormat(PixelFormat.TRANSPARENT);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mSurfaceHolder.addCallback(this);
mCameraManager = new CameraManager(context);
mCameraManager.setCameraCallback(this);
}
public CameraManager getCameraManager() {
return mCameraManager;
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
Logs.i(TAG, "surfaceCreated..." + hasSurface);
if (!hasSurface && holder != null) {
hasSurface = true;
openCamera();
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Logs.i(TAG, "surfaceChanged [" + width + ", " + height + "]");
mSurfaceWidth = width;
mSurfaceHeight = height;
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Logs.v(TAG, "surfaceDestroyed.");
closeCamera();
hasSurface = false;
}
public SurfaceHolder getSurfaceHolder() {
return mSurfaceHolder;
}
public void onResume() {
if (hasSurface) {
openCamera();
}
}
public void onPause() {
closeCamera();
}
private void openCamera() {
if (mSurfaceHolder == null) {
Logs.e(TAG, "SurfaceHolder is null.");
return;
}
if (mCameraManager.isOpen()) {
Logs.w(TAG, "Camera is opened！");
return;
}
mCameraManager.openCamera();
}
private void closeCamera() {
mCameraManager.releaseCamera();
}
private String getString(int resId) {
return getResources().getString(resId);
}
private void setAspectRatio(int width, int height) {
if (width < 0 || height < 0) {
throw new IllegalArgumentException("Size cannot be negative.");
}
mRatioWidth = width;
mRatioHeight = height;
requestLayout();
}
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
int width = MeasureSpec.getSize(widthMeasureSpec);
int height = MeasureSpec.getSize(heightMeasureSpec);
if (0 == mRatioWidth || 0 == mRatioHeight) {
setMeasuredDimension(width, height);
} else {
if (width < height * mRatioWidth / mRatioHeight) {
setMeasuredDimension(width, width * mRatioHeight / mRatioWidth);
} else {
setMeasuredDimension(height * mRatioWidth / mRatioHeight, height);
}
}
}
@Override
public void onOpen() {
mCameraManager.startPreview(getSurfaceHolder());
}
@Override
public void onOpenError(int error, String msg) {
}
@Override
public void onPreview(int previewWidth, int previewHeight) {
if (mSurfaceWidth > mSurfaceHeight) {
setAspectRatio(previewWidth, previewHeight);
} else {
setAspectRatio(previewHeight, previewWidth);
}
}
@Override
public void onPreviewError(int error, String msg) {
}
@Override
public void onClose() {
}
}
|
