Android 开发 TextView中出现参差不齐状态解决方法

方法一：

在TextView中添加属性：

android:breakStrategy="simple"

方法二：

自定义TextView

package com.monkey.monkeymushroom.view;

 

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.util.AttributeSet;

import android.widget.TextView;

 

/**

 * 解决文字排版混乱参差不齐的问题

 */

public class JustifyTextView extends TextView {

 

 private int mLineY;

 private int mViewWidth;

 public static final String TWO_CHINESE_BLANK = " ";

 

 public JustifyTextView(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) {

  TextPaint paint = getPaint();

  paint.setColor(getCurrentTextColor());

  paint.drawableState = getDrawableState();

  mViewWidth = getMeasuredWidth();

  String text = getText().toString();

  mLineY = 0;

  mLineY += getTextSize();

  Layout layout = getLayout();

 

  // layout.getLayout()在4.4.3出现NullPointerException

  if (layout == null) {

   return;

  }

 

  Paint.FontMetrics fm = paint.getFontMetrics();

 

  int textHeight = (int) (Math.ceil(fm.descent - fm.ascent));

  textHeight = (int) (textHeight * layout.getSpacingMultiplier() + layout

    .getSpacingAdd());

  //解决了最后一行文字间距过大的问题

  for (int i = 0; i < layout.getLineCount(); i++) {

   int lineStart = layout.getLineStart(i);

   int lineEnd = layout.getLineEnd(i);

   float width = StaticLayout.getDesiredWidth(text, lineStart,

     lineEnd, getPaint());

   String line = text.substring(lineStart, lineEnd);

 

   if (i < layout.getLineCount() - 1) {

    if (needScale(line)) {

     drawScaledText(canvas, lineStart, line, width);

    } else {

     canvas.drawText(line, 0, mLineY, paint);

    }

   } else {

    canvas.drawText(line, 0, mLineY, paint);

   }

   mLineY += textHeight;

  }

 }

 

 private void drawScaledText(Canvas canvas, int lineStart, String line, float lineWidth) {

  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);

  }

 

  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) {

  if (line == null || line.length() == 0) {

   return false;

  } else {

   return line.charAt(line.length() - 1) != '\n';

  }

 }

}