Get the size of a text in TextView

问题:

I have a problem placing a textView at specified center's x and y coordinates. Firstly, I tried to set the text in the textView, and to move the view with the width and the height of the view from this link.

But it doesn't work, and I'd like to try something else. I'd like to know if there is a method to get the size which a specified text will take in my textView? I mean, I know the text and the textSize, how can I get the width and the height my textView will take?

Something like the method (NSString)sizeWithFont; for those who know iPhone dev.

回答1:

If your textview is called TV

TV.setText("bla");
TV.measure(0, 0);       //must call measure!
TV.getMeasuredHeight(); //get height
TV.getMeasuredWidth();  //get width

More on this (updated): How to get width/height of a View

回答2:

Rect bounds = new Rect();

textView.getPaint().getTextBounds(textView.getText().toString(), 0, textView.getText().length(), bounds);

bounds.width() will give you the accurate width of the text in the Text View.

回答3:

For some reason the solution of Midverse Engineer does not give me always correct results (at least on some Android versions). The solution of Sherif elKhatib works, but has the side effect of changing MeasuredWidth and Height. This could lead to incorrect positioning of the textView.

My solution:

width = textView.getPaint().measureText(text);
metrics = textView.getPaint().getFontMetrics();
height = metrics.bottom - metrics.top;

回答4:

Using the TextView inner Paing class is not so hot when you have multiple lines of text and different paddings. So stop trying to reinvent the wheel. Use getMeasuredHeight and getMeasuredWidth methods after calling measure(UNSPECIFIED, UNSPECIFIED). Just don't forget to get the new values inside the post, otherwise mostly you'll get a wrong result.

tv.setText(state.s);
tv.measure(UNSPECIFIED,UNSPECIFIED);
tv.post(new Runnable() {
    @Override
    public void run() {
       Log.d("tv","Height = "+tv.getMeasuredHeight());
       Log.d("tv","Width  = "+tv.getMeasuredWidth());
    }
});