Android原生的TextView，遇到中文和数字或者中文和英文一起混排的时候，会出现自动换行的现象。本来第一行还有很多空间可以显示，却莫名其妙地换行显示。 解决思路采用的是自定义view，挨个画字符，一个一个吧文字画出来
package com.boc.mcc_ams.view.widget; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Canvas; import android.graphics.Color; import android.graphics.Paint; import android.util.AttributeSet; import android.view.View; import com.boc.mcc_ams.R; public class MyTextView extends View { //内容填充画笔 private Paint contentPaint; //标准的字体颜色 private String contentNormalColor = "#737373"; //有焦点的字体颜色 private String contentFocuedColor = "#333333"; //控件宽度 private int viewWidth = 0; //控件高度 private int viewHeight = 0; //标准的字的样式 public static final int TEXT_TYPE_NORMAL = 1; //控件获取焦点的时候进行的处理 public static final int TEXT_TYPE_FOCUED = 2; //默认是标准的样式 private int currentTextType = TEXT_TYPE_NORMAL; //默认当前的颜色 private String textColor = "#333333"; //字体大小 private int textSize = 40; //内容 private String mText = "测试的文字信息"; //最小view高度 private float minHeight = 0; //最小view宽度 private float minWidth = 0; //行间距 private float lineSpace; //最大行数 private int maxLines = 0; //文字测量工具 private Paint.FontMetricsInt textFm; ///真实的行数 private int realLines; //当前显示的行数 private int line; //在末尾是否显示省略号 private boolean showEllipsise; //文字显示区的宽度 private int textWidth; //单行文字的高度 private int signleLineHeight; private int mPaddingLeft,mPaddingRight,mPaddingTop,mPaddingBottom; /** * 省略号 **/ private String ellipsis = "..."; public MyTextView(Context context) { this(context,null); } public MyTextView(Context context, AttributeSet attrs) { this(context, attrs,0); } public MyTextView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initAttr(context,attrs); init(); } private boolean isFristload; /** * 初始化 */ private void init() { contentPaint = new Paint(); contentPaint.setTextSize(textSize); contentPaint.setAntiAlias(true); contentPaint.setStrokeWidth(2); contentPaint.setColor(Color.parseColor(textColor)); contentPaint.setTextAlign(Paint.Align.LEFT); textFm = contentPaint.getFontMetricsInt(); signleLineHeight=Math.abs(textFm.top-textFm.bottom); } /** * 初始化属性 * @param context * @param attrs */ private void initAttr(Context context,AttributeSet attrs) { TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.MyTextView); mPaddingLeft = typedArray.getDimensionPixelSize(R.styleable.MyTextView_paddingLeft, 0); mPaddingRight = typedArray.getDimensionPixelSize(R.styleable.MyTextView_paddingRight, 0); mPaddingTop = typedArray.getDimensionPixelSize(R.styleable.MyTextView_paddingTop, 0); mPaddingBottom = typedArray.getDimensionPixelSize(R.styleable.MyTextView_paddingBottom, 0); mText = typedArray.getString(R.styleable.MyTextView_text); textColor = typedArray.getString(R.styleable.MyTextView_textColo); maxLines = typedArray.getInteger(R.styleable.MyTextView_maxLine,-1); if(textColor==null){ textColor="#000000"; } textSize = typedArray.getDimensionPixelSize(R.styleable.MyTextView_textSize, 50); lineSpace = typedArray.getInteger(R.styleable.MyTextView_lineSpacing, 0); typedArray.recycle(); } public void setText(String ss){ this.mText=ss; invalidate(); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { super.onMeasure(widthMeasureSpec,heightMeasureSpec); viewWidth=getMeasuredWidth(); textWidth=viewWidth-mPaddingLeft-mPaddingRight; viewHeight= (int) getViewHeight(); setMeasuredDimension(viewWidth, viewHeight); } private float getViewHeight() { char[] textChars=mText.toCharArray(); float ww=0.0f; int count=0; StringBuilder sb=new StringBuilder(); for(int i=0;i<textChars.length;i++){ float v = contentPaint.measureText(textChars[i] + ""); if(ww+v<=textWidth){ sb.append(textChars[i]); ww+=v; } else{ if (maxLines < 0 ) { count++; sb=new StringBuilder(); ww=0.0f; ww+=v; sb.append(textChars[i]); } else { if (maxLines <= count) { break; } else { count++; sb=new StringBuilder(); ww=0.0f; ww+=v; sb.append(textChars[i]); } } } } if (maxLines < 0) { if (sb.toString().length() != 0) { count++; } } else { if (maxLines <= count) { } else { count++; } } return count*signleLineHeight+lineSpace*(count-1)+mPaddingBottom+mPaddingTop; } @Override protected void onDraw(Canvas canvas) { drawText(canvas); } /** * 循环遍历画文字 * @param canvas */ private void drawText(Canvas canvas) { char[] textChars=mText.toCharArray(); float ww=0.0f; float startL=0.0f; float startT=0.0f; startL+=mPaddingLeft; startT+=mPaddingTop+signleLineHeight/2+ (textFm.bottom-textFm.top)/2 - textFm.bottom; StringBuilder sb=new StringBuilder(); for(int i=0;i<textChars.length;i++){ float v = contentPaint.measureText(textChars[i] + ""); if(ww+v<=textWidth){ sb.append(textChars[i]); ww+=v; } else{ canvas.drawText(sb.toString(),startL,startT,contentPaint); startT+=signleLineHeight+lineSpace; sb=new StringBuilder(); ww=0.0f; ww+=v; sb.append(textChars[i]); line++; if (maxLines > 0 && maxLines <= line) { break; } } } if (maxLines > 0 && maxLines <= line) { }else { if(sb.toString().length()>0){ canvas.drawText(sb.toString(),startL,startT,contentPaint); } } } }自定义属性
<declare-styleable name="MyTextView"> <attr name="paddingLeft" format="dimension" /> <attr name="paddingTop" format="dimension" /> <attr name="paddingRight" format="dimension" /> <attr name="paddingBottom" format="dimension" /> <attr name="textSize" format="dimension" /> <attr name="textColor" format="string" /> <attr name="text" format="string"/> <attr name="lineSpacing" format="integer" /> <attr name="maxLine" format="integer"/> <attr name="ellipsis" format="boolean" /> </declare-styleable>目前一些自定义属性没有添加，后期完善
