java - 拍照并保存到 SD 而不会降低质量

Question

我有一个可以拍照并将其存储到 SD 卡的应用程序，但是我拍摄的每张照片都经过了极度压缩，质量非常低。我以完整质量压缩它，所以我不确定为什么要这样做。有什么建议么？这是代码:

protected void takePhoto()
{
    Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
    startActivityForResult(intent, 0); 
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data){
    super.onActivityResult(requestCode, resultCode, data);
    currPhoto = (ImageView) findViewById(R.id.imageView1);

    if (requestCode== 0 && resultCode == Activity.RESULT_OK){
        Bitmap x = (Bitmap) data.getExtras().get("data");
        currPhoto.setImageBitmap(x);
        ContentValues values = new ContentValues();
        values.put(Images.Media.MIME_TYPE, "image/jpeg");
        Uri uri = getContentResolver().insert(Media.EXTERNAL_CONTENT_URI, values);
        OutputStream outstream;
        try {
            outstream = getContentResolver().openOutputStream(uri);

        x.compress(Bitmap.CompressFormat.JPEG, 90, outstream);
        outstream.close();
        } catch (FileNotFoundException e) {
            //
        }catch (IOException e){
            //
        }
    }
}

编辑:事实上它似乎只将缩略图保存到 SD。

Answer 1

来自documentation :

public static final String ACTION_IMAGE_CAPTURE

Added in API level 3 Standard Intent action that can be sent to have the camera application capture an image and return it.

The caller may pass an extra EXTRA_OUTPUT to control where this image will be written. If the EXTRA_OUTPUT is not present, then a small sized image is returned as a Bitmap object in the extra field. This is useful for applications that only need a small image. If the EXTRA_OUTPUT is present, then the full-sized image will be written to the Uri value of EXTRA_OUTPUT.