How to get the position of a picture inside an ImageView?

Question

I have a gallery of images with different sizes. Each image is displayed inside an `ImageView` sequentially (through `OnTouchListener`). I need to know the position of the frame of the picture I'm showing relatives to the `ImageView` but with the testing I've done I've only gotten the coordinates of `ImageView`. Any idea? I need the values of (x1, y1) and (x2, y2). Thanks in advance. This is my class: ``` public class PuzzleView extends ImageView { protected Paint currentPaint; protected boolean drawRect = false; protected float left; protected float top; protected float right; protected float bottom; protected float pixelX; protected float pixelY; protected int nChunksX = 5; protected int nChunksY = 5; protected int currentWidth = 0; protected int currentHeight = 0; public PuzzleView(Context context, AttributeSet attrs) { super(context, attrs); currentPaint = new Paint(); currentPaint.setDither(true); currentPaint.setColor(0xFF00CC00); currentPaint.setStyle(Paint.Style.STROKE); curre…

Accepted Answer

According to Jacob Nordfalk's link, I was able to produce a static method allowing you to get the image position and dimensions from an ImageView.

```
/**
 * Returns the bitmap position inside an imageView.
 * @param imageView source ImageView
 * @return 0: left, 1: top, 2: width, 3: height
 */
public static int[] getBitmapPositionInsideImageView(ImageView imageView) {
    int[] ret = new int[4];

if (imageView == null || imageView.getDrawable() == null)
        return ret;

// Get image dimensions
    // Get image matrix values and place them in an array
    float[] f = new float[9];
    imageView.getImageMatrix().getValues(f);

// Extract the scale values using the constants (if aspect ratio maintained, scaleX == scaleY)
    final float scaleX = f[Matrix.MSCALE_X];
    final float scaleY = f[Matrix.MSCALE_Y];

// Get the drawable (could also get the bitmap behind the drawable and getWidth/getHeight)
    final Drawable d = imageView.getDrawable();
    final int origW = d.getIntrinsicWidth();
    final int origH = d.getIntrinsicHeight();

// Calculate the actual dimensions
    final int actW = Math.round(origW * scaleX);
    final int actH = Math.round(origH * scaleY);

ret[2] = actW;
    ret[3] = actH;

// Get image position
    // We assume that the image is centered into ImageView
    int imgViewW = imageView.getWidth();
    int imgViewH = imageView.getHeight();

int top = (int) (imgViewH - actH)/2;
    int left = (int) (imgViewW - actW)/2;

ret[0] = left;
    ret[1] = top;

return ret;
}
```

How to get the position of a picture inside an ImageView?

Solution

Problem