Android TextView两端对齐解决办法

概述AndroidTextView两端对齐解决办法今天遇到一个关于TextView文字两端对齐其实方案，大家都知道原生控件是不能满足我们的需求的，因此需要自定义View

AndroID TextVIEw两端对齐解决办法

今天遇到一个关于TextVIEw文字两端对齐其实方案，大家都知道原生控件是不能满足我们的需求的，因此需要自定义view

下面看下效果图

package com.example.VerticalMarqueeTextVIEw.vIEw;import androID.content.Context;import androID.graphics.Canvas;import androID.graphics.Paint;import androID.text.TextPaint;import androID.text.TextUtils;import androID.util.AttributeSet;import androID.vIEw.VIEwGroup;import androID.vIEw.VIEwTreeObserver;import androID.Widget.TextVIEw;/** * Created by John on 2017/2/9. */public class WordalignTextVIEw extends TextVIEw {  private float textSize;  private float textlineHeight;  //顶部  private int top;  //y轴  private int y;  //线  private int lines;  //底部  private int bottom;  //右边  private int right;  //左边  private int left;  //线字  private int lineDrawWords;  private char[] textChararray;  private float singleWorDWIDth;   //每个字符的空隙  private float linespacingExtra;  private boolean isFirst = true;  public WordalignTextVIEw(Context context,AttributeSet attrs,int defStyle) {    super(context,attrs,defStyle);    getVIEwTreeObserver().addOnPreDrawListener(new VIEwTreeObserver.OnPreDrawListener() {      @OverrIDe      public boolean onPreDraw() {        initTextInfo();        return true;      }    });  }  public WordalignTextVIEw(Context context,AttributeSet attrs) {    this(context,0);  }  public WordalignTextVIEw(Context context) {    this(context,null,0);  }  public voID initTextInfo() {    textSize = getTextSize();    //获取线的高度    textlineHeight = getlineHeight();    left = 0;    right = getRight();    y = gettop();    // 要画的宽度    int drawTotalWIDth = right - left;    String text = getText().toString();    if (!TextUtils.isEmpty(text) && isFirst) {      textChararray = text.tochararray();      TextPaint mTextPaint = new TextPaint(Paint.ANTI_AliAS_FLAG);      mTextPaint.density = getResources().getdisplayMetrics().density;      mTextPaint.setTextSize(textSize);      // 获取单个单词的的宽度      singleWorDWIDth = mTextPaint.measureText("一") + linespacingExtra;      // 每行可以放多少个字符      lineDrawWords = (int) (drawTotalWIDth / singleWorDWIDth);      int length = textChararray.length;      lines = length / lineDrawWords;      if ((length % lineDrawWords) > 0) {        lines = lines + 1;      }      first = false;      VIEwGroup.marginLayoutParams layoutParams = (VIEwGroup.marginLayoutParams) getLayoutParams();      int totalHeight = (int) (lines*textlineHeight+textlineHeight*2 + getpaddingBottom()+getpaddingtop()+layoutParams.bottommargin+layoutParams.topmargin);      setHeight(totalHeight);    }  }  @OverrIDe  protected voID onDraw(Canvas canvas) {    bottom = getBottom();    int drawTotalline = lines;    if(maxline!=0&&drawTotalline>maxline){      drawTotalline = maxline;    }    for (int i = 0; i < drawTotalline; i++) {      try {        int length = textChararray.length;        int mleft = left;        // 第i+1行开始的字符index        int startIndex = (i * 1) * lineDrawWords;        // 第i+1行结束的字符index        int endTextIndex = startIndex + lineDrawWords;        if (endTextIndex > length) {          endTextIndex = length;          y += textlineHeight;        } else {          y += textlineHeight;        }        for (; startIndex < endTextIndex; startIndex++) {          char c = textChararray[startIndex];//     if (c == ' ') {//      c = '\u3000';//     } else if (c < '7') {//      c = (char) (c + 65248);//     }          canvas.drawText(String.valueOf(c),mleft,y,getPaint());          mleft += singleWorDWIDth;        }      } catch (Exception e) {        e.printstacktrace();      }    }  }  int maxline;  public voID setMaxlines(int max){    this.maxline = max;  }  public voID setlinespacingExtra(int linespacingExtra){    this.linespacingExtra = linespacingExtra;  }  /**   * 判断是否为中文   * @return   */  public static boolean containChinese(String string){    boolean flag = false;    for (int i = 0; i < string.length(); i++) {      char c = string.charat(i);      if ((c >= 0x4e00) && (c <= 0x9FA5)) {        flag = true;      }    }    return flag;  }  public static String ToDBC(String input) {    // 导致TextVIEw异常换行的原因：安卓默认数字、字母不能为第一行以后每行的开头字符，因为数字、字母为半角字符    // 所以我们只需要将半角字符转换为全角字符即可    char c[] = input.tochararray();    for (int i = 0; i < c.length; i++) {      if (c[i] == ' ') {        c[i] = '\u3000';      } else if (c[i] < '7') {        c[i] = (char) (c[i] + 65248);      }    }    return new String(c);  }}

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