由于使用前置摄像头，所看到的视频是镜像的。我怎样才能正常。我用过这段代码。
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Button buttonStartCameraPreview = (Button)findViewById(R.id.startcamerapreview);
Button buttonStopCameraPreview = (Button)findViewById(R.id.stopcamerapreview);
Button buttonCapturePreview = (Button) findViewById(R.id.capturepreview);
getWindow().setFormat(PixelFormat.UNKNOWN);
surfaceView = (SurfaceView)findViewById(R.id.surfaceview);
surfaceHolder = surfaceView.getHolder();
surfaceHolder.addCallback(this);
rawCallback = new PictureCallback()
{
public void onPictureTaken(byte[] data, Camera camera)
{
Log.d("Log", "onPictureTaken - raw");
}
};
shutterCallback = new ShutterCallback()
{
public void onShutter() {
Log.i("Log", "onShutter'd");
}
};
jpegCallback = new PictureCallback()
{
public void onPictureTaken(byte[] data, Camera camera)
{
Bitmap bitmap = BitmapFactory.decodeByteArray(data , 0, data.length);
bitmap = flip(bitmap);
Intent imageIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
File imagesFolder = new File(Environment.getExternalStorageDirectory(), "Asw/Raw Image");
imagesFolder.mkdirs();
Date d = new Date();
CharSequence s = DateFormat.format("MM-dd-yy hh-mm-ss", d.getTime());
name = s.toString() + ".jpg";
File output = new File(imagesFolder, name);
Uri uriSavedImage = Uri.fromFile(output);
imageIntent.putExtra(MediaStore.EXTRA_OUTPUT, uriSavedImage);
OutputStream imageFileOS;
try {
imageFileOS = getContentResolver().openOutputStream(uriSavedImage);
imageFileOS.write(data);
imageFileOS.flush();
imageFileOS.close();
}
catch (FileNotFoundException e)
{
e.printStackTrace();
}
catch (IOException e)
{
e.printStackTrace();
}
finally
{}
Log.d("Log", "onPictureTaken - jpeg");
}
buttonStartCameraPreview.setOnClickListener(new Button.OnClickListener()
{
@TargetApi(Build.VERSION_CODES.GINGERBREAD)
@Override
public void onClick(View v)
{
if(!previewing)
{
camera = Camera.open(0);
if (camera != null)
{
try {
camera.setPreviewDisplay(surfaceHolder);
camera.startPreview();
previewing = true;
}
catch (IOException e)
{
e.printStackTrace();
}
}else txtData.setText("null");
}
}});
buttonCapturePreview.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
captureImage();
}
});
buttonStopCameraPreview.setOnClickListener(new Button.OnClickListener(){
@Override
public void onClick(View v)
{
if(camera != null && previewing)
{
camera.stopPreview();
camera.release();
camera = null;
previewing = false;
}
}});
}
private void captureImage()
{
camera.takePicture(shutterCallback, rawCallback, jpegCallback);
}
BitmapDrawable flip(Bitamp bitmap)
{
Matrix m = new Matrix();
m.setScale(-1, 1);
Bitmap bmp = d.getBitmap();
Bitmap dst = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), m, false);
dst.setDensity(DisplayMetrics.DENSITY_DEFAULT);
return new BitmapDrawable(dst);
}
请告诉我这个错误有什么问题。 flip（）方法正在进行镜像处理......有什么问题吗？任何建议都会很明显