Example usage for android.text TextPaint breakText

Introduction

In this page you can find the example usage for android.text TextPaint breakText.

Prototype

public int breakText(String text, boolean measureForwards, float maxWidth, float[] measuredWidth) 

Source Link

Document

Measure the text, stopping early if the measured width exceeds maxWidth.

Usage

From source file:Main.java

/**
 * Draw text on canvas. Shade if text too long to fit.
 *
 * @param canvas The canvas to draw in./*from   www  .j  a  va2s  .com*/
 * @param text The text to draw.
 * @param x The x coordinate.
 * @param y The y coordinate.
 * @param textPaint The paint to draw with.
 * @param availableWidth The available width for the text
 */
public static void drawText(Canvas canvas, String text, float x, float y, TextPaint textPaint,
        int availableWidth) {
    text = text.replaceAll("\\r?\\n", " ");
    final TextPaint localTextPaint = new TextPaint(textPaint);
    final float pixelsToShade = 1.5F * localTextPaint.getTextSize();
    int characters = text.length();

    if (localTextPaint.measureText(text) > availableWidth) {
        Paint.Align align = localTextPaint.getTextAlign();
        float shaderStopX;
        characters = localTextPaint.breakText(text, true, availableWidth, null);
        if (align == Paint.Align.LEFT) {
            shaderStopX = x + availableWidth;
        } else if (align == Paint.Align.CENTER) {
            float[] measuredWidth = new float[1];
            characters = localTextPaint.breakText(text, true, availableWidth, measuredWidth);
            shaderStopX = x + (measuredWidth[0] / 2);
        } else { // align == Paint.Align.RIGHT
            shaderStopX = x;
        }
        // Hex 0x60000000 = first two bytes is alpha, gives semitransparent
        localTextPaint.setShader(new LinearGradient(shaderStopX - pixelsToShade, 0, shaderStopX, 0,
                localTextPaint.getColor(), localTextPaint.getColor() + 0x60000000, Shader.TileMode.CLAMP));
    }
    canvas.drawText(text, 0, characters, x, y, localTextPaint);
}

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