Returns TextView's text width(not TextView width). - Android User Interface

Android examples for User Interface:TextView

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Description

Returns TextView's text width(not TextView width).

Demo Code


//package com.java2s;

import android.graphics.Paint;

import android.widget.TextView;

public class Main {
    /**//from  w w  w.  ja va2s .c  o m
     * Returns TextView's text width(not TextView width).
     * <p>TextView default size is 14sp. Note that text size is not equal to text width and height.
     * <p>Note that padding is not in calculation scope.
     * 
     * @param tv
     * @return text width in pixel or 0 if TextView.getText() is empty.
     */
    public static int getTextWidth(TextView tv) {
        /*
         * It has a little bit deviation(usually smaller than the real value 2px) to calculate TextView width as follow:
         * Paint paint = new Paint(); // new Paint instance, not TextView's Paint instance.
         * paint.setTextSize(tv.getTextSize());
         * return paint.measureText(tv.getText().toString());
         */
        Paint paint = tv.getPaint(); // Retrieves TextPaint, subclass of Paint.
        // Log.v(TAG, "TextView size is " + paint.getTextSize() + " sp.");
        // If text is empty, it will return 0.
        return Math.round(paint.measureText(tv.getText().toString()));
    }
}

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