I am trying to flip and ImageView
vertically but it just won't work.
Java:
public static void flipImageVertically(final Bitmap bmp, final ImageView imageView) {
final Matrix matrix = new Matrix();
matrix.preScale(1.0f, -1.0f);
imageView.setImageBitmap(Bitmap.createBitmap(bmp, 0, 0, bmp.getWidth(), bmp.getHeight(), matrix, true));
}
XML:
<LinearLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1">
<ImageView
android:id="@+id/imageView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@color/red" />
</LinearLayout>
The ImageView
isn't flipping at all.
Anyone know why?
Check this answer. You can perform flip very easily using an xml parameter
android:scaleY="-1"
Note that this does not work in preview, only when you run the app.
Since Android Studio 2, this works in preview as well.
Alternatively you can call setScaleY(-1f)
on your ImageView
in code.