仅限肖像图片

Question

我有一个定制的摄像头活动，应该只在纵向模式下拍照，但是在三星设备上，照片总是在我的nexus设备上以横向模式显示，图片在纵向模式下正确显示。下面是我设置相机参数和方向的方法。此初始化预览在SurfaceHolder中调用。回调表面更改方法。

 /** INITIALIZE THE PREVIEW PARAMTERS */
 private void initPreview(int width, int height) {
    if ( mCamera != null && previewHolder.getSurface() != null) {
        try {
            mCamera.setPreviewDisplay( previewHolder );
        }
        catch (Throwable t) {
            Log.e("PreviewDemo-surfaceCallback", "Exception in setPreviewDisplay()", t);
            Crouton.makeText( this, t.getMessage(), Style.ALERT ).show();
        }

        if (!cameraConfigured) {
            Camera.Parameters parameters = mCamera.getParameters();
            Camera.Size size = getBestPreviewSize(width, height, parameters);
            Camera.Size pictureSize = getSmallestPictureSize(parameters);

            if (size != null && pictureSize != null) {
                parameters.setPreviewSize( size.width, size.height );
                parameters.setPictureSize( pictureSize.width, pictureSize.height );
                parameters.setPictureFormat( ImageFormat.JPEG);

                parameters.set( "orientation", "portrait" );
                parameters.setRotation( 90 );
                mCamera.setDisplayOrientation( 90 );
                mCamera.setParameters( parameters );
                cameraConfigured = true;
            }
        }
    }
}

Answer 1

出身背景

三星在这方面有缺陷。你可以试试这个。。。

获取定位，以将照片URL与存在问题的三星隔离开来。。。

public static int getOrientation(Context context, Uri photoUri) {
    /* it's on the external media. */
    Cursor cursor = context.getContentResolver().query(photoUri,
            new String[] { MediaStore.Images.ImageColumns.ORIENTATION }, null, null, null);

    if (cursor.getCount() != 1) {
        return -1;
    }

    cursor.moveToFirst();
    return cursor.getInt(0);
}

一旦你确定了，做一个位图旋转来纠正三星的问题。。。

                            if( getOrientation(ctx, photoUrl) == 0 ||  getOrientation(ctx, photoUrl) == -1){
                                //not samsung issue so process as normal;
                            }else{  // bad samsung needs rotation

                                Bitmap lbit =   
                                BitmapFactory.decodeStream(
                                        getContentResolver().openInputStream(_photo_uri),null,options);

                                lbit = lbit.copy(Bitmap.Config.ARGB_8888, true);
                                Matrix matrix = new Matrix();
                                matrix.postRotate(intReturnFromGetOrientationCall);
                                lbit = Bitmap.createBitmap(lbit, 0, 0, lbit.getWidth(),
                                        lbit.getHeight(), matrix, true);
                                Picture.setBmp(lbit);
                            }