ImageView Pinch-zoom Scale Limits and pan bounds

Question

I wanted to create a gallery with images. The images within the gallery should be zoomable and pannable. I could able to pinch-zoom an image but could not able to set zoom l

Answer 1

You can set zoom limit by adding these lines to ACTION_MOVE, mode == ZOOM:

float[] f = new float[9];
matrix.getValues(f);

float scaleX = f[Matrix.MSCALE_X];
float scaleY = f[Matrix.MSCALE_Y];
if (scaleX > MAX_SCALE || scaleY > MAX_SCALE) return true;

Similarly, add lines to ACTION_MOVE, mode == DRAG that takes into account the original location of your image, the translated length, and then compare them to the bounds.