系统自带的控件TextView有时候没满一行就换行了，为了解决这个问题，自定义了一个TextView，只有一行显示不完全的情况下才会去换行显示，代码如下：

 

package com.open.textview;import java.util.ArrayList;import android.content.Context;import android.graphics.Canvas;import android.graphics.Paint;import android.graphics.Rect;import android.text.TextUtils;import android.util.AttributeSet;import android.view.View;/** * 不换行的TextView * @author Administrator * */public class CusTextView extends View {	    protected float textSize=35;      protected float paddingLeft=0;    protected float paddingRight=0;    protected float paddingTop=0;    protected float paddingBottom=0;        protected float lineSpace=5;     protected int lineWidth=320;    protected float lineHeight=20;    protected int lineCount;    protected int maxLines=-1;//最大的行数        protected String mText;    protected ArrayList
    
      lineList=new ArrayList
     
      (0);//行的字符串索引	        protected Paint mPaint = new Paint();  	{		mPaint.setTextSize(textSize);          mPaint.setAntiAlias(true); 	}		public CusTextView(Context context) {		super(context);	}	public CusTextView(Context context, AttributeSet attrs) {		super(context, attrs);	}	public CusTextView(Context context, AttributeSet attrs, int defStyle) {		super(context, attrs, defStyle);	}		public void setText(String text) {		this.mText = text;		lineList.clear();		requestLayout();		invalidate();	}		public void setText(String text,int maxLines)	{		this.maxLines=maxLines;		this.setText(text);	}		@Override	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {				if(TextUtils.isEmpty(mText))		{			setMeasuredDimension(0, 0);			return;		}				lineWidth=(int)(MeasureSpec.getSize(widthMeasureSpec)-paddingLeft-paddingRight);//每行的宽度		Rect bounds = new Rect();        mPaint.getTextBounds(mText, 0, mText.length(), bounds);        lineHeight=bounds.bottom-bounds.top;        maxLines=-1;        lineList.clear();        calculate();        lineCount=lineList.size();//总行数		maxLines=(maxLines>0)?Math.min(lineCount, maxLines):lineCount;				int measuredHeight=0;//总的高度		if(maxLines>0)		{			measuredHeight+=(paddingTop+paddingBottom);//顶部与底部			measuredHeight+=(maxLines-1)*lineSpace;//空隙的间隔			measuredHeight+=(maxLines*(lineHeight));//行高之和		}		int result=measuredHeight;		int specMode = MeasureSpec.getMode(heightMeasureSpec);        int specSize =  MeasureSpec.getSize(heightMeasureSpec);        switch (specMode) {        case MeasureSpec.UNSPECIFIED:            result = measuredHeight;            break;        case MeasureSpec.AT_MOST:            result = Math.min(measuredHeight, specSize);            break;        case MeasureSpec.EXACTLY:            result = specSize;            break;        }		setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), result);	}	@Override	protected void onDraw(Canvas canvas) {				if(TextUtils.isEmpty(mText))		{			return;		}				for(int i=0;i
      
       =mText.length())			{				break;			}						startIndex=itemLine[1];		}	}		private int[] getIndexArray(int startIndex)	{		int[] ret=new int[2];				int  canholdcharSize=0;		int singleCharWidth=(int) mPaint.measureText(mText, startIndex, startIndex+1);//单个字符宽度		singleCharWidth=Math.max(singleCharWidth, 1);		canholdcharSize=lineWidth/singleCharWidth;//每行可以容纳的字数,非精确值				if(isOutOfIndex(startIndex,canholdcharSize))//检查是否越界了		{			canholdcharSize=mText.length()-startIndex;		}				if(isFitness(startIndex,canholdcharSize,lineWidth))//如果linecharSize个字符还小于单行的长度，需要再次自加长度来判断		{			while(true)			{				canholdcharSize++;				if(isOutOfIndex(startIndex,canholdcharSize))				{					canholdcharSize--;					break;				}								if(isFitness(startIndex,canholdcharSize,lineWidth))				{					continue;				}				else				{					canholdcharSize--;					break;				}			}		}		else //需要再次自减长度来判断		{			while(true)			{				canholdcharSize--;				if(isFitness(startIndex,canholdcharSize,lineWidth))				{					break;				}				else				{					continue;				}			}		}				ret[0]=startIndex;		ret[1]=(startIndex+canholdcharSize);		return ret;	}		private boolean isOutOfIndex(int startIndex,int linecharSize)	{		return startIndex+linecharSize>mText.length();	}		private boolean isFitness(int startIndex,int canholdcharSize,int lineWidth)	{		return mPaint.measureText(mText, startIndex, startIndex+canholdcharSize)<=lineWidth;	}		public class LineParams	{		public int startIndex;		public int endIndex;				public LineParams(int startIndex, int endIndex) 		{			this.startIndex = startIndex;			this.endIndex = endIndex;		}				public boolean isInnerRange(int testNum)		{			return (testNum>=startIndex&&testNum<=endIndex);		}		@Override		public String toString() 		{			return "LineParams [startIndex=" + startIndex + ", endIndex="+ endIndex + "]";		}	}}
      
     
    

 

Demo地址：

 

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