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嗨 我想用我的应用程序之一中的相机捕捉图像。有什么特别的是我需要一个正方形的预览区域(最后是图片)。我尝试将图片和预览的大小定义为1:1像素比例,但没有任何接缝可以工作。不管我做了什么,照片看起来都在一个正方形上“压扁”了。Android相机预览:1:1宽高比,怎么样?
任何人有任何想法如何解决这个问题?
代码:
public class AddFromCameraActivity extends Activity implements SurfaceHolder.Callback {
private Camera mCamera;
private Parameters mParameters;
private SurfaceView mCameraPreview;
private SurfaceHolder mSurfaceHolder;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.addimagefromcameramain);
initialise();
//Testing area
mCamera = Camera.open();
mParameters = mCamera.getParameters();
mParameters.setFlashMode(Camera.Parameters.FLASH_MODE_AUTO);
mParameters.setFocusMode(Camera.Parameters.FOCUS_MODE_AUTO);
mParameters.setJpegQuality(50);
mParameters.setJpegThumbnailQuality(50);
mParameters.setPictureSize(1024, 1024);
//mParameters.setPreviewFormat(ImageFormat.JPEG);
mParameters.setJpegThumbnailSize(256, 256);
mParameters.setPreviewSize(500, 500);
mCamera.setParameters(mParameters);
}
private void initialise()
{
mCameraPreview = (SurfaceView)findViewById(R.id.cameraSurfaceView);
mSurfaceHolder = mCameraPreview.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mSurfaceHolder.setFixedSize(500, 500);
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
try {
mCamera.setPreviewDisplay(mSurfaceHolder);
mCamera.startPreview();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
mCamera.stopPreview();
mCamera.release();
}
@Override
public void onPause()
{
mCamera.release();
}
}
感谢
谷歌搜索CameraPreview实现,并发现这一点。它似乎处理不同的长宽比。得试试它。 https://github.com/pocorall/scaloid-apidemos/blob/master/src/main/java/com/example/android/apis/graphics/CameraPreview.java – akhyar 2014-02-07 13:38:51