安卓TextView文本不满一行由于英文，标点符号等原因换行

1、

String aaa = “随便复制一段文字，用于测试，大家自己写下。有特殊符号，然后标点，英文什么的。”

2、

转半角函数，因为实际看起来半角函数比较好看

public static String ToDBC(String input) {    char[] c = input.toCharArray();    for (int i = 0; i< c.length; i++) {        if (c[i] == 12288) {            c[i] = (char) 32;            continue;        }if (c[i]> 65280&& c[i]< 65375)            c[i] = (char) (c[i] - 65248);    }    return new String(c);}

3、

文本肯定是自定义控件，java文件见最下面，demo引自：http://www.eoeandroid.com/forum.php?mod=viewthread&tid=555569&extra=page%3D1&page=1

4、

XXX.setText(ToDBC(aaa));

5、

上面3步骤的java文件

/** * Project Name:TextViewDemo * File Name:TypesetTextView.java * Package Name:com.example.view * Date:2014-11-29上午10:10:31 */package com.uzmap.pkg.utils;import android.content.Context;import android.graphics.Canvas;import android.graphics.Paint;import android.text.Layout;import android.text.StaticLayout;import android.text.TextPaint;import android.text.TextUtils;import android.util.AttributeSet;import android.widget.TextView;/** * ClassName:TypesetTextView * Date:     2014-11-29 上午10:10:31 * @author Lenovo * @version * @since JDK 1.7 * @see */public class TypesetTextView extends TextView {    private int mLineY;    private int mViewWidth;    public static final String TWO_CHINESE_BLANK = "  ";    private StringBuffer mText;    private StringBuffer newText = null;    private Paint mPaint;    /**VIEW的高度*/    private int mHeight = 0;    /**行高*/    private static final int LINE_HEIGHT = 40;    private int oneLine;//一行显示文字个数    private int number_of_words;//显示的字数    public TypesetTextView(Context context, AttributeSet attrs) {        super(context, attrs);    }    @Override    protected void onLayout(boolean changed, int left, int top, int right,                            int bottom) {        super.onLayout(changed, left, top, right, bottom);    }    @Override    protected void onDraw(Canvas canvas) {        String text = getText().toString();// 获取文本内容        if (null == mText) {//以单例模式对文字进行拆分            mText = new StringBuffer(text);            TextPaint paint = getPaint();//获取画笔            paint.setColor(getCurrentTextColor());// 获取文字颜色将其设置到画笔上            paint.setTextSize(getTextSize());//设置文字大小            paint.setTypeface(getTypeface());//设置字体，包括字体的类型，粗细，还有倾斜、颜色等            paint.drawableState = getDrawableState();            mViewWidth = getMeasuredWidth();//获取填写字数的宽            mPaint = paint;            caculateChangeLine();//对文字进行分行处理        }        mLineY = getPaddingTop();//设置头部内边距        mLineY += getTextSize();        Layout layout = getLayout();//避免出现空视图        if (layout == null) {            return;        }        Paint.FontMetrics fm = mPaint.getFontMetrics();        int textHeight = (int) (Math.ceil(fm.descent - fm.ascent));        textHeight = (int) (textHeight * layout.getSpacingMultiplier() + layout                .getSpacingAdd());//获取文字的高度        String[] split = newText.toString().split("\n");//将分割好滴文字进行排版        if (null != split && split.length > 0) {//此处设置文本显示的高度，适配一些手机无法显示            int i = (split.length) + 0;//多设置了几行以避免显示不全(看情况进行修改)            int setheight = textHeight * i;            setHeight(setheight);//设置textview高度        }        for (int i = 0; i < split.length; i++) {            //此处为源例子上的写法，标点符号换行问题还是存在（楼主引用，ToDBC(aaa)的方法进行了修改，已解决这个bug）//                layout.getLineCount()//获取显示的行数//                int lineStart = layout.getLineStart(i);//                int lineEnd = layout.getLineEnd(i);//获取每行要显示的字数            String string = split[i];            float width = StaticLayout.getDesiredWidth(string, 0,                    string.length(), getPaint());            if (null == string || TextUtils.isEmpty(string)) {                continue;            }            int strWidth = (int) mPaint.measureText(string + "好好");//验证是否足够一个屏幕的宽度            if (needScale(string) && string.trim().length() > number_of_words - 5 && mViewWidth < strWidth)//判断是否足够一行显示的字数，足够久进行字的处理不够则直接画出来            //，避免出现字数不够，字间距被画出来的字间距过大影响排版            {// 判断是否结尾处需要换行，并且不是文本最后一行                drawScaledText(canvas, getPaddingLeft(), split[i], width, i);            } else {                canvas.drawText(split[i], getPaddingLeft(), mLineY, mPaint);// 将字符串直接画到控件上            }            mLineY += textHeight;        }    }    /**     * @Description:计算出一行显示的文字     */    private String caculateOneLine(String str) {        //对一段没有\n的文字进行换行        String returnStr = "";        int strWidth = (int) mPaint.measureText(str);        int len = str.length();        int lineNum = strWidth / mViewWidth; //大概知道分多少行        int tempWidth = 0;        String lineStr;        int returnInt = 0;        if (lineNum == 0) {            returnStr = str;            mHeight += LINE_HEIGHT;            return returnStr;        } else {            oneLine = len / (lineNum + 1);    //一行大概有多少个字            if (number_of_words < oneLine) {                number_of_words = oneLine;            }            lineStr = str.substring(0, oneLine);            tempWidth = (int) mPaint.measureText(lineStr);            if (tempWidth < mViewWidth) //如果小了 找到大的那个            {                while (tempWidth < mViewWidth) {                    oneLine++;                    lineStr = str.substring(0, oneLine);                    tempWidth = (int) mPaint.measureText(lineStr);                }                returnInt = oneLine - 1;                returnStr = lineStr.substring(0, lineStr.length() - 2);            } else//大于宽找到小的            {                while (tempWidth > mViewWidth) {                    oneLine--;                    lineStr = str.substring(0, oneLine);                    tempWidth = (int) mPaint.measureText(lineStr);                }                returnStr = lineStr.substring(0, lineStr.length() - 1);                returnInt = oneLine;            }            mHeight += LINE_HEIGHT;            returnStr += "\n" + caculateOneLine(str.substring(returnInt - 1));        }        return returnStr;    }    public void caculateChangeLine() {        newText = new StringBuffer();        String tempStr[] = mText.toString().split("\n");        int len = tempStr.length;        for (int i = 0; i < len; i++) {            String caculateOneLine = caculateOneLine(tempStr[i]);            if (!TextUtils.isEmpty(caculateOneLine)) {                newText.append(caculateOneLine);                newText.append("\n");            }        }        this.setHeight(mHeight);    }    private void drawScaledText(Canvas canvas, int lineStart, String line,                                float lineWidth, int currentline) {        float x = 0;        if (isFirstLineOfParagraph(lineStart, line)) {// 判断是否是第一行            canvas.drawText(TWO_CHINESE_BLANK, x, mLineY, getPaint());            float bw = StaticLayout.getDesiredWidth(TWO_CHINESE_BLANK, getPaint());            x += bw;            line = line.substring(3);        }        int gapCount = line.length() - 1;        int i = 0;        if (line.length() > 2 && line.charAt(0) == 12288                && line.charAt(1) == 12288) {            String substring = line.substring(0, 2);            float cw = StaticLayout.getDesiredWidth(substring, getPaint());            canvas.drawText(substring, x, mLineY, getPaint());            x += cw;            i += 2;        }        float d = (mViewWidth - lineWidth) / gapCount;        for (; i < line.length(); i++) {            String c = String.valueOf(line.charAt(i));            float cw = StaticLayout.getDesiredWidth(c, getPaint());            canvas.drawText(c, x, mLineY, getPaint());            x += cw + d;        }    }    private boolean isFirstLineOfParagraph(int lineStart, String line) {        return line.length() > 3 && line.charAt(0) == ' '                && line.charAt(1) == ' ';    }    private boolean needScale(String line) {// 判断是否需要换行        if (line == null || line.length() == 0) {            return false;        } else {            char charAt = line.charAt(line.length() - 1);            return charAt != '\n';        }    }}