整篇textview文字排版混乱问题

当使用textview设置大量文字的时候，由于标点符号和中英文的原因，导致尾部有空白的情况，下面这个自定义textview比较好的解决了这个问题。

import android.content.Context;import android.graphics.Canvas;import android.text.Layout;import android.text.StaticLayout;import android.text.TextPaint;import android.util.AttributeSet;import android.util.Log;import android.widget.TextView;public class JustifyTextView extends TextView {private int mLineY;private int mViewWidth;public JustifyTextView(Context context, AttributeSet attrs) {super(context, attrs);}public JustifyTextView(Context context) {super(context);}@Overrideprotected void onLayout(boolean changed, int left, int top, int right,int bottom) {super.onLayout(changed, left, top, right, bottom);}@Overrideprotected void onDraw(Canvas canvas) {TextPaint paint = getPaint();paint.setColor(getCurrentTextColor());paint.drawableState = getDrawableState();mViewWidth = getMeasuredWidth();String text = (String) getText();mLineY = 0;mLineY += getTextSize();Layout layout = getLayout();for (int i = 0; i < layout.getLineCount(); i++) {int lineStart = layout.getLineStart(i);int lineEnd = layout.getLineEnd(i);String line = text.substring(lineStart, lineEnd);Log.e("lineEnd",lineEnd+"");//if(i==layout.getLineCount()-1){//lineEnd = (int) paint.measureText(line);//}float width = StaticLayout.getDesiredWidth(text, lineStart,lineEnd, getPaint());if (needScale(line)) {if(i==layout.getLineCount()-1){drawScaledText(canvas, lineStart, line, width,true);}else{drawScaledText(canvas, lineStart, line, width,false);}} else {canvas.drawText(line, 0, mLineY, paint);}mLineY += getLineHeight();}}private void drawScaledText(Canvas canvas, int lineStart, String line,float lineWidth,boolean boo) {float x = 0;if (isFirstLineOfParagraph(lineStart, line)) {String blanks = "  ";canvas.drawText(blanks, x, mLineY, getPaint());float bw = StaticLayout.getDesiredWidth(blanks, getPaint());x += bw;line = line.substring(3);}float d = (mViewWidth - lineWidth) / line.length() - 1;for (int i = 0; i < line.length(); i++) {String c = String.valueOf(line.charAt(i));float cw = StaticLayout.getDesiredWidth(c, getPaint());canvas.drawText(c, x, mLineY, getPaint());if(boo){x += cw;}else{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) {if (line.length() == 0) {return false;} else {return line.charAt(line.length() - 1) != '\n';}}}