这个问题我研究了蛮久了，最终初见点效果，

给出核心代码，给同行们分享，package com.textview.test;

import java.util.Vector;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.graphics.Paint.FontMetrics;

import android.util.AttributeSet;

import android.view.View;

import android.view.WindowManager;

import android.widget.LinearLayout;

import android.widget.TextView;

public class MyView extends TextView {

private final String namespace="http://www.nearmobile.net";

private int resourceId=0;

/* 声明Paint对象 */

private Paint mPaint = null;

/* 声明TextUtil对象 */

private TextUtil mTextUtil = null;

public  static  int m_iTextHeight;

private WindowManager wm=null;

private String string="";

public MyView(Context context, AttributeSet set) {

super(context,set);

resourceId=set.getAttributeResourceValue(namespace, "text", 0);

if(resourceId==0)

string=set.getAttributeValue(null,"text");

else

string=this.getResources().getString(resourceId);

wm=(WindowManager)context.getSystemService(Context.WINDOW_SERVICE);

/* 构建对象 */

m_iTextHeight=2000;

mPaint = new Paint();

mPaint.setColor(Color.RED);

mPaint.setStrokeWidth(40);

mPaint.setTextSize(20);

int m_iTextWidth=wm.getDefaultDisplay().getWidth();

FontMetrics fm = mPaint.getFontMetrics();

int m_iFontHeight = (int) Math.ceil(fm.descent - fm.top) + 4;

int line=0;

int istart=0;

int w=0;

for (int i = 0; i < string.length(); i++)

{

char ch = string.charAt(i);

float[] widths = new float[1];

String srt = String.valueOf(ch);

mPaint.getTextWidths(srt, widths);

if (ch == '\n')

{

line++;

istart = i + 1;

w = 0;

}

else

{

w += (int) (Math.ceil(widths[0]));

if (w > m_iTextWidth)

{

line++;

istart = i;

i--;

w = 0;

}

else

{

if (i == (string.length() - 1))

{

line++;

}

}

}

}

m_iTextHeight=(line+2)*m_iFontHeight+2;

//用反射机制得到     m_iTextHeight  值

/*  实例化TextUtil

mTextUtil = new TextUtil(string,5,25,wm.getDefaultDisplay().getWidth(),this.getHeight(),0x0,0xffffff,255,15);

初始化TextUtil

mTextUtil.InitText(string,5,25,wm.getDefaultDisplay().getWidth(),wm.getDefaultDisplay().getHeight(),0x0,0xffffff,255,15);*/

}

@Override

protected void onDraw(Canvas canvas) {

super.onDraw(canvas);

/* 设置背景颜色 */

canvas.drawColor(Color.BLACK);

mPaint.setAntiAlias(true);

char ch;

int w = 0;

int istart = 0;

int m_iFontHeight;

int m_iRealLine=0;

int x=2;

int y=60;

Vector m_String=new Vector();

int m_iTextWidth=wm.getDefaultDisplay().getWidth();

FontMetrics fm = mPaint.getFontMetrics();

m_iFontHeight = (int) Math.ceil(fm.descent - fm.top) + 4;

//m_ipageLineNum = m_iTextHeight / m_iFontHeight;

for (int i = 0; i < string.length(); i++)

{

ch = string.charAt(i);

float[] widths = new float[1];

String srt = String.valueOf(ch);

mPaint.getTextWidths(srt, widths);

if (ch == '\n')

{

m_iRealLine++;

m_String.addElement(string.substring(istart, i));

istart = i + 1;

w = 0;

}

else

{

w += (int) (Math.ceil(widths[0]));

if (w > m_iTextWidth)

{

m_iRealLine++;

m_String.addElement(string.substring(istart, i));

istart = i;

i--;

w = 0;

}

else

{

if (i == (string.length() - 1))

{

m_iRealLine++;

m_String.addElement(string.substring(istart, string.length()));

}

}

}

}

m_iTextHeight=m_iRealLine*m_iFontHeight+2;

System.out.println("m_iTextHeight----->"+m_iTextHeight);

canvas.setViewport(m_iTextWidth, m_iTextWidth);

for (int i = 0, j = 0; i < m_iRealLine; i++, j++)

{

canvas.drawText((String) (m_String.elementAt(i)), x,  y+m_iFontHeight * j, mPaint);

}

}

protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {

int measuredHeight = measureHeight(heightMeasureSpec);

int measuredWidth = measureWidth(widthMeasureSpec);

this.setMeasuredDimension(measuredWidth, measuredHeight);

this.setLayoutParams(new LinearLayout.LayoutParams(measuredWidth,measuredHeight));

super.onMeasure(widthMeasureSpec, heightMeasureSpec);

}

private int measureHeight(int measureSpec) {

int specMode = MeasureSpec.getMode(measureSpec);

int specSize = MeasureSpec.getSize(measureSpec);

// Default size if no limits are specified.

int result = m_iTextHeight;

if (specMode == MeasureSpec.AT_MOST)

{

// Calculate the ideal size of your

// control within this maximum size.

// If your control fills the available

// space return the outer bound.

result = specSize;

}

else if (specMode == MeasureSpec.EXACTLY)

{

// If your control can fit within these bounds return that value.

result = specSize;

}

return result;

}

private int measureWidth(int measureSpec) {

int specMode = MeasureSpec.getMode(measureSpec);

int specSize = MeasureSpec.getSize(measureSpec);

// Default size if no limits are specified.

int result = 500;

if (specMode == MeasureSpec.AT_MOST)

{

// Calculate the ideal size of your control

// within this maximum size.

// If your control fills the available space

// return the outer bound.

result = specSize;

}

else if (specMode == MeasureSpec.EXACTLY)

{

// If your control can fit within these bounds return that value.

result = specSize;

}

return result;

}

}