如何在android中获取图像视图的宽度和高度？

Question

In my code I have an Image View in my XML layout and I keep changing the source image for this in my code. Now I want to know the width and height of the generated image each time.

I tried using getWidth() , getHeight(), getMeasuredWidth(), and getMeasuredHeight() , but they all return 0.

How can I get this?

Answer 1

Where you calling getWidth() and getHeight() on ImageView? If you calling from onCreate() in activity, it won't work. You need to wait for activity window to attached and then call getWidth() and getHeight() on ImageView. You can try calling getWidth() and getHeight() from onWindowFocusChanged() method of your activity.

@Override
public void onWindowFocusChanged(boolean hasFocus){
    int width=imageView.getWidth();
    int height=imageView.getHeight();
}

Answer 2

try this

 ImageView iv=(ImageView)findViewById(R.id.image);
 ViewTreeObserver vto = iv.getViewTreeObserver();
    vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
        public boolean onPreDraw() {
           finalHeight = iv.getMeasuredHeight();
           finalWidth = iv.getMeasuredWidth();
           Log.e("hilength","Height: " + finalHeight + " Width: " + finalWidth);
            return true;
        }
    });

Answer 3

try this code

int finalHeight, finalWidth;
final ImageView iv = (ImageView)findViewById(R.id.scaled_image);
final TextView tv = (TextView)findViewById(R.id.size_label);
ViewTreeObserver vto = iv.getViewTreeObserver();
vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
    public boolean onPreDraw() {
        iv.getViewTreeObserver().removeOnPreDrawListener(this);
        finalHeight = iv.getMeasuredHeight();
        finalWidth = iv.getMeasuredWidth();
        tv.setText("Height: " + finalHeight + " Width: " + finalWidth);
        return true;
    }
});

it's really working...

Answer 4

if you set ImageView a drawable, and the ImageView's height and width type is WRAP_CONTENT, you can get the ImageView's height and width by this even you calling from onCreate()

int height = imageView.getDrawable().getIntrinsicHeight();
int width = imageView.getDrawable().getIntrinsicWidth();

Answer 5

The way you make reference to the image object is wrong. That's why you are given zero all the time. first create a bitmap object from imageview and get the width and height from it.

When taken a image from cam I do the following and it works like a charm.

Bitmap image2 = (Bitmap) data1.getExtras().get("data");
double width = Double.valueOf(image2.getWidth());
Log.v("WIDTH", String.valueOf(width));
double height = Double.valueOf(image2.getHeight());
Log.v("height", String.valueOf(height));

Hope it helps for you.

Answer 6

First you have to convert the image to mutablebitmap and the try to get the width and height of the image and mostly this will solve your issue..

    Bitmap Rbitmap = Bitmap.createBitmap(bitmap).copy(
                    Config.ARGB_4444, true);

Rbitmap.getWidth();
Rbitmap.getheight();

Answer 7

Try this solution:

Bitmap bitmap = ((BitmapDrawable)imageView.getBackground()).getBitmap();
int width = bitmap.getWidth();
int height = bitmap.getHeight();