android - "ScaleType:FIT_XY"不拉伸(stretch)图库中的图像

Question

我有一个横向模式的图库，其中有很多带有图像适配器的图像。我希望图像水平拉伸(stretch)到整个屏幕，并保持纵横比并根据需要垂直拉伸(stretch)..
我尝试使用 FIT_XY，它不适合水平方向，但它不保持垂直比例(图像被压碎)
我怎样才能做到这一点？这是自定义图像适配器:

    public class ImageAdapter extends BaseAdapter {
int mGalleryItemBackground;
int counter = 0;

private final Context mContext;

public String[] mImageIds;

public ImageAdapter(Context c) {
    mContext = c;
    TypedArray a = c.obtainStyledAttributes(R.styleable.Gallery1);
    mGalleryItemBackground = a.getResourceId(R.styleable.Gallery1_android_galleryItemBackground, 0);
    a.recycle();
}

public void insert(String string) {
    mImageIds[counter] = string;
    counter++;
}

@Override
public int getCount() {
    return mImageIds.length;
}

@Override
public Object getItem(int position) {
    return position;
}

@Override
public long getItemId(int position) {
    return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    ImageView i = new ImageView(mContext);

    i.setImageBitmap(BitmapFactory.decodeFile(mImageIds[position]));
    i.setLayoutParams(new Gallery.LayoutParams(WindowManager.LayoutParams.FILL_PARENT, WindowManager.LayoutParams.FILL_PARENT));
    i.setScaleType(ImageView.ScaleType.MATRIX);
    i.setBackgroundResource(mGalleryItemBackground);

    return i;
}

Answer 1

当我在 android 中执行此操作时，我使用合适的缩放比例(fitCenter、fitStart、fitEnd)和调整 View 边界，例如 xml 属性

android:scaleType="fitCenter" android:adjustViewBounds="true"