How to find the Text Area(Height/Width) of TextView programmatically in android

问题

I have an EditText, a Button and a TextView. On clicking the button, textview shows the text written in edittext. Is it possible to find the size of textview occupied depending upon text. i.e. If It has three characters "abc", what is width now, if it has 5 characters like "abcde" , then what is the width ?

回答1:

Rect bounds = new Rect();
Paint textPaint = textView.getPaint();
textPaint.getTextBounds(text,0,text.length(),bounds);
int height = bounds.height();
int width = bounds.width();

textView.setText("bla");
textView.measure(0, 0);
textView.getMeasuredWidth();
textView.getMeasuredHeight();

回答2:

Please try this:

public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    TextView edit = (TextView) findViewById(R.id.edit);
    edit.setTextSize(20);       
    edit.setText("Hello, world");       
    edit.measure(0, 0);
    int width = edit.getMeasuredWidth();
    Log.w("width", width.toString());
}

Before you get width, you have to measure the view / label / text edit. Please let me know if this is not working.

回答3:

Try this way,hope this will help you to solve your problem.

yourTextView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
   @Override
   public void onGlobalLayout() {
     int width = yourTextView.getMeasuredWidth();
     int height = yourTextView.getMeasuredHeight();

   }
});

回答4:

please tell me width in??? do you want ?

TextView method getWidth() gives you width of your view, in pixels

TextView textView = (TextView)findViewById(R.id.textview);
textView.getWidth(); //width of your view, in pixels

回答5:

TextView txt = new TextView(mContext);
txt.setText("Some Text)";
int height = txt.getLineCount() *  txt.getLineHeight();
int width = txt.getWidth();

回答6:

Well, I haven't converted this code into swift4 syntax, but the logic will remain the same. This is an extension method for Xamarin.ios(C#).

To Calculate the Height

 public static nfloat GetEstimateHeight(this UITextView textView, UIView View)
    {
        var size = new CoreGraphics.CGSize(View.Frame.Width, height: float.PositiveInfinity);
        var estimatedSize = textView.SizeThatFits(size);
        return estimatedSize.Height;
    }

To Calculate the Width

    public static nfloat GetEstimateWidth(this UITextView textView, UIView View)
    {
        var size = new CoreGraphics.CGSize(View.Frame.Width, height: float.PositiveInfinity);
        var estimatedSize = textView.SizeThatFits(size);
        return estimatedSize.Width;
    }

The logic here that will work for swift is

var size = new CoreGraphics.CGSize(View.Frame.Width, height: float.PositiveInfinity);
        var estimatedSize = textView.SizeThatFits(size);
        var textViewFinalHeight = estimatedSize.Height;

来源：https://stackoverflow.com/questions/24359538/how-to-find-the-text-areaheight-width-of-textview-programmatically-in-android

标签

android

android-layout

textview

layoutparams