/**

• Created by 19219 on 2016/11/16.
• 強(qiáng)制字符占滿一行才換行，避免TextView中英混合過早換行客年，并且在最后添加點(diǎn)擊文字
  */

public class TextViewLineFeed extends TextView {
    private float textX;
    private float textY;
    private int clickStart;
    private ClickTextListner clickTextListner;
    private float clickTextWidth;

    protected void onDraw(Canvas canvas) {
//        使用默認(rèn)畫筆
        getPaint().setColor(getCurrentTextColor());
        getPaint().setUnderlineText(false);

//        獲取文字內(nèi)容
        String text = getText().toString();

//        獲取每個(gè)字符寬
        float[] charWidths = new float[text.length()];
        getPaint().getTextWidths(text, charWidths);

//        點(diǎn)擊文字寬
        for (int i = clickStart; i < charWidths.length; i++)
            clickTextWidth += charWidths[i];

//        循環(huán)換行輸出
        textLineFeed(canvas, text, charWidths);
    }

    /**
     * 換行失仁，并在最后添加點(diǎn)擊文字
     */
    private void textLineFeed(Canvas canvas, String text, float[] charWidths) {
//        第一行文字基線Y坐標(biāo)
        textY = getTextSize();
        for (int start = 0, end = 0, strLineLen = 0; end < charWidths.length; ++end) {
//            文本寬超過View寬雷激，換行輸出
            if ((strLineLen += charWidths[end]) > getWidth()) {
                if (end - 1 < clickStart) {
                    canvas.drawText(text.substring(start, end), 0, textY, getPaint());
                } else {
                    canvas.drawText(text.substring(start, clickStart), 0, textY, getPaint());
//                    避免點(diǎn)擊文字中間換行璧疗，強(qiáng)制把點(diǎn)擊文字換行輸出
                    getPaint().setColor(0xff0000ff);
                    getPaint().setUnderlineText(true);
                    canvas.drawText(text.substring(clickStart, charWidths.length), (textX = 0), (textY = textY + getLineHeight()), getPaint());
                    break;
                }
                strLineLen = 0;
                start = end;
                textY += getLineHeight();
            }
//            文本結(jié)束且不超過View寬更啄，不換行輸出
            if (end == charWidths.length - 1) {
                canvas.drawText(text.substring(start, clickStart), 0, textY, getPaint());
                textX = 0;
                for (int i = start; i < clickStart; i++)
                    textX += charWidths[i];
                getPaint().setColor(0xff0000ff);
                getPaint().setUnderlineText(true);
                canvas.drawText(text.substring(clickStart, ++end), textX, textY, getPaint());
            }
        }
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                if (event.getX() > textX &&
                        event.getX() < (textX + clickTextWidth) &&
                        event.getY() > (textY - getLineHeight()))
                    clickTextListner.clickText();
                break;
        }
        return super.onTouchEvent(event);
    }

    /**
     * 在文字最后附加點(diǎn)擊功能
     * @param start 點(diǎn)擊文字的起始位置
     */
    public void setClickText(int start) {
        clickStart = start;
    }


    public interface ClickTextListner {
        public void clickText();
    }

    public void setClickTextListner(ClickTextListner click) {
        clickTextListner = click;
    }

    public TextViewLineFeed(Context context) {
        this(context, null);
    }

    public TextViewLineFeed(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public TextViewLineFeed(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }
}

簡(jiǎn)書: http://www.reibang.com/p/5d8c8448af1b
CSDN博客: http://blog.csdn.net/qq_32115439/article/details/53711576
GitHub博客：http://lioil.win/2016/11/17/TextView-LineFeed.html
Coding博客：http://c.lioil.win/2016/11/17/TextView-LineFeed.html