How to know the height of the text in a text view with specific text size?

Question

In the layout, I have a textview with height wrap_content. The text size is 10 sp. So I want to know the exact height of the text.

The reason that I want to know the height is, I want to use image span to display some bitmap images in the text view. And the decode method needs the target width and height.

Is it possible? Thanks.

TextView.getLayout is not available when I try to get this in adapter's getView method. I think at that time that value is null. — XWang, Nov 02 '13 at 13:40
ok, seems that layout phase is nor execured yet, you would need to run the code i posted before in a Runnable that you. pass to textview.post method — pskink, Nov 02 '13 at 14:48
possible duplicate of [How do you to retrieve dimensions of a view? Getheight() and Getwidth() always return zero](http://stackoverflow.com/questions/4142090/how-do-you-to-retrieve-dimensions-of-a-view-getheight-and-getwidth-always-r) — androidcodehunter, Nov 03 '13 at 03:15

score 0 · Answer 1 · answered Nov 02 '13 at 09:01

0

You can get the heigth by the textview object:

    TextView text = (TextView) findViewById(R.id.<ID_OF_TEXTVIEW_IN_LAYOUT);
    int textViewHeigth = text.getHeigth();

answered Nov 02 '13 at 09:01

André

71
2
4

No, getHeight returns 0. getMeasuredHeight also returns 0. I call that method in adapter's getView function. – XWang Nov 02 '13 at 13:41

score 0 · Answer 2 · answered Nov 02 '13 at 16:02

In activity onCreate() override onGlobalLayout method of your layout. This method is called after all views are computed. Get the textView height there.
Assuming that your TextView is in a RelativeLayout

RelativeLayout relativeLayout = (RelativeLayout) findViewById(R.id.relativeLayout);
relativeLayout.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
    @Override
    public void onGlobalLayout() {
        relativeLayout.getViewTreeObserver().removeGlobalOnLayoutListener(this);
        TextView text = (TextView) findViewById(R.id.yourTextView);
        int textViewHeigth = text.getHeigth();

        //Do what you want
    }
});

score 0 · Answer 3 · edited May 23 '17 at 12:21

You can override onWindowFocusChanged method and here you can get the actual height and width of your view.

@Override
public void onWindowFocusChanged (boolean hasFocus) {
        // the height will be set at this point
        int textViewHeigth = text.getHeigth();
}

Here some post for you: getHeight returns 0 for all Android UI objects and another one How do you to retrieve dimensions of a view? Getheight() and Getwidth() always return zero

score 0 · Answer 4 · answered Nov 08 '13 at 14:06

0

There are two APIs in TextView which could be used. They are getTextSize and getLineHeight. Thanks for all the answer and help.

answered Nov 08 '13 at 14:06

XWang

797
2
7
20

How to know the height of the text in a text view with specific text size?

4 Answers4