diff --git a/MTextView/src/com/example/mtextview/MTextView.java b/MTextView/src/com/example/mtextview/MTextView.java
index 1fd75fe..c0ed50c 100644
--- a/MTextView/src/com/example/mtextview/MTextView.java
+++ b/MTextView/src/com/example/mtextview/MTextView.java
@@ -33,627 +33,655 @@
  * @2014年5月27日
  * @下午5:29:27
  */
-public class MTextView extends TextView
-{
-	/**
-	 * 缓存测量过的数据
-	 */
-	private static HashMap<String, SoftReference<MeasuredData>> measuredData = new HashMap<String, SoftReference<MeasuredData>>();
-	private static int hashIndex = 0;
-	/**
-	 * 存储当前文本内容，每个item为一行
-	 */
-	ArrayList<LINE> contentList = new ArrayList<LINE>();
-	private Context context;
-	/**
-	 * 用于测量字符宽度
-	 */
-	private TextPaint paint = new TextPaint();
-	/**
-	 * 用于测量span高度
-	 */
-	private Paint.FontMetricsInt mSpanFmInt = new Paint.FontMetricsInt();
-	/**
-	 * 临时使用,以免在onDraw中反复生产新对象
-	 */
-	private FontMetrics mFontMetrics = new FontMetrics();
-
-	//	private float lineSpacingMult = 0.5f;
-	private int textColor = Color.BLACK;
-	//行距
-	private float lineSpacing;
-	private int lineSpacingDP = 5;
-	/**
-	 * 最大宽度
-	 */
-	private int maxWidth;
-	/**
-	 * 只有一行时的宽度
-	 */
-	private int oneLineWidth = -1;
-	/**
-	 * 已绘的行中最宽的一行的宽度
-	 */
-	private float lineWidthMax = -1;
-	/**
-	 * 存储当前文本内容,每个item为一个字符或者一个SpanObject
-	 */
-	private ArrayList<Object> obList = new ArrayList<Object>();
-	/**
-	 * 是否使用默认{@link #onMeasure(int, int)}和{@link #onDraw(android.graphics.Canvas)}
-	 */
-	private boolean useDefault = false;
-	protected CharSequence text = "";
-
-	private int minHeight;
-	/**
-	 * 用以获取屏幕高宽
-	 */
-	private DisplayMetrics displayMetrics;
-	/**
-	 * {@link android.text.style.BackgroundColorSpan}用
-	 */
-	private Paint textBgColorPaint = new Paint();
-	/**
-	 * {@link android.text.style.BackgroundColorSpan}用
-	 */
-	private Rect textBgColorRect = new Rect();
-
-	public MTextView(Context context) {
-		super(context);
-		init(context);
-	}
-
-	public MTextView(Context context, AttributeSet attrs) {
-		super(context, attrs);
-		init(context);
-	}
-
-	public MTextView(Context context, AttributeSet attrs, int defStyle) {
-		super(context, attrs, defStyle);
-		init(context);
-	}
-
-
-	public void init(Context context) {
-		this.context = context;
-		paint.setAntiAlias(true);
-		lineSpacing = dip2px(context, lineSpacingDP);
-		minHeight = dip2px(context, 30);
-
-		displayMetrics = new DisplayMetrics();
-	}
-
-	public static int px2sp(Context context, float pxValue) {
-		final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
-		return (int) (pxValue / fontScale + 0.5f);
-	}
-
-	/**
-	 * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
-	 */
-	public static int dip2px(Context context, float dpValue) {
-		final float scale = context.getResources().getDisplayMetrics().density;
-		return (int) (dpValue * scale + 0.5f);
-	}
-
-	@Override
-	public void setMaxWidth(int maxpixels) {
-		super.setMaxWidth(maxpixels);
-		maxWidth = maxpixels;
-	}
-
-	@Override
-	public void setMinHeight(int minHeight) {
-		super.setMinHeight(minHeight);
-		this.minHeight = minHeight;
-	}
-
-	@Override
-	protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
-		if (useDefault) {
-			super.onMeasure(widthMeasureSpec, heightMeasureSpec);
-			return;
-		}
-		int width = 0, height = 0;
-
-		int widthMode = MeasureSpec.getMode(widthMeasureSpec);
-		int heightMode = MeasureSpec.getMode(heightMeasureSpec);
-		int widthSize = MeasureSpec.getSize(widthMeasureSpec);
-		int heightSize = MeasureSpec.getSize(heightMeasureSpec);
-
-		switch (widthMode) {
-			case MeasureSpec.EXACTLY:
-				width = widthSize;
-				break;
-			case MeasureSpec.AT_MOST:
-				width = widthSize;
-				break;
-			case MeasureSpec.UNSPECIFIED:
-
-				((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
-				width = displayMetrics.widthPixels;
-				break;
-			default:
-				break;
-		}
-		if (maxWidth > 0) {
-			width = Math.min(width, maxWidth);
-		}
-
-		paint.setTextSize(this.getTextSize());
-		paint.setColor(textColor);
-		int realHeight = measureContentHeight((int) width);
-
-		//如果实际行宽少于预定的宽度，减少行宽以使其内容横向居中
-		int leftPadding = getCompoundPaddingLeft();
-		int rightPadding = getCompoundPaddingRight();
-		width = Math.min(width, (int) lineWidthMax + leftPadding + rightPadding);
-
-		if (oneLineWidth > -1) {
-			width = oneLineWidth;
-		}
-		switch (heightMode) {
-			case MeasureSpec.EXACTLY:
-				height = heightSize;
-				break;
-			case MeasureSpec.AT_MOST:
-				height = realHeight;
-				break;
-			case MeasureSpec.UNSPECIFIED:
-				height = realHeight;
-				break;
-			default:
-				break;
-		}
-
-		height += getCompoundPaddingTop() + getCompoundPaddingBottom();
-
-		height = Math.max(height, minHeight);
-
-		setMeasuredDimension(width, height);
-	}
-
-	@Override
-	protected void onDraw(Canvas canvas) {
-		if (useDefault) {
-			super.onDraw(canvas);
-			return;
-		}
-		if (contentList.isEmpty()) {
-			return;
-		}
-		int width;
-
-		Object ob;
-
-		int leftPadding = getCompoundPaddingLeft();
-		int topPadding = getCompoundPaddingTop();
-
-		float height = 0 + topPadding + lineSpacing;
-		//只有一行时
-		if (oneLineWidth != -1) {
-			height = getMeasuredHeight() / 2 - contentList.get(0).height / 2;
-		}
-
-		for (LINE aContentList : contentList) {
-			//绘制一行
-			float realDrawedWidth = leftPadding;
-			for (int j = 0; j < aContentList.line.size(); j++) {
-				ob = aContentList.line.get(j);
-				width = aContentList.widthList.get(j);
-
-				paint.getFontMetrics(mFontMetrics);
-				float x = realDrawedWidth;
-				float y = height + aContentList.height - paint.getFontMetrics().descent;
-				float top = y - aContentList.height;
-				float bottom = y + mFontMetrics.descent;
-				if (ob instanceof String) {
-					canvas.drawText((String) ob, realDrawedWidth, y, paint);
-					realDrawedWidth += width;
-				} else if (ob instanceof SpanObject) {
-					Object span = ((SpanObject) ob).span;
-					if (span instanceof DynamicDrawableSpan) {
-
-						int start = ((Spannable) text).getSpanStart(span);
-						int end = ((Spannable) text).getSpanEnd(span);
-						((DynamicDrawableSpan) span).draw(canvas, text, start, end, (int) x, (int) top, (int) y, (int) bottom, paint);
-						realDrawedWidth += width;
-					} else if (span instanceof BackgroundColorSpan) {
-
-						textBgColorPaint.setColor(((BackgroundColorSpan) span).getBackgroundColor());
-						textBgColorPaint.setStyle(Style.FILL);
-						textBgColorRect.left = (int) realDrawedWidth;
-						int textHeight = (int) getTextSize();
-						textBgColorRect.top = (int) (height + aContentList.height - textHeight - mFontMetrics.descent);
-						textBgColorRect.right = textBgColorRect.left + width;
-						textBgColorRect.bottom = (int) (height + aContentList.height + lineSpacing - mFontMetrics.descent);
-						canvas.drawRect(textBgColorRect, textBgColorPaint);
-						canvas.drawText(((SpanObject) ob).source.toString(), realDrawedWidth, height + aContentList.height - mFontMetrics.descent, paint);
-						realDrawedWidth += width;
-					} else//做字符串处理
-					{
-						canvas.drawText(((SpanObject) ob).source.toString(), realDrawedWidth, height + aContentList.height - mFontMetrics.descent, paint);
-						realDrawedWidth += width;
-					}
-				}
-
-			}
-			height += aContentList.height + lineSpacing;
-		}
-
-	}
-
-	@Override
-	public void setTextColor(int color) {
-		super.setTextColor(color);
-		textColor = color;
-	}
-
-	/**
-	 * 用于带ImageSpan的文本内容所占高度测量
-	 *
-	 * @param width 预定的宽度
-	 * @return 所需的高度
-	 */
-	private int measureContentHeight(int width) {
-		int cachedHeight = getCachedData(text.toString(), width);
-
-		if (cachedHeight > 0) {
-			return cachedHeight;
-		}
-
-		// 已绘的宽度
-		float obWidth = 0;
-		float obHeight = 0;
-
-		float textSize = this.getTextSize();
-		FontMetrics fontMetrics = paint.getFontMetrics();
-		//行高
-		float lineHeight = fontMetrics.bottom - fontMetrics.top;
-		//计算出的所需高度
-		float height = lineSpacing;
-
-		int leftPadding = getCompoundPaddingLeft();
-		int rightPadding = getCompoundPaddingRight();
-
-		float drawedWidth = 0;
-
-		boolean splitFlag = false;//BackgroundColorSpan拆分用
-
-		width = width - leftPadding - rightPadding;
-
-		oneLineWidth = -1;
-
-		contentList.clear();
-
-		StringBuilder sb;
-
-		LINE line = new LINE();
-
-		for (int i = 0; i < obList.size(); i++) {
-			Object ob = obList.get(i);
-
-			if (ob instanceof String) {
-				obWidth = paint.measureText((String) ob);
-				obHeight = textSize;
-			} else if (ob instanceof SpanObject) {
-				Object span = ((SpanObject) ob).span;
-				if (span instanceof DynamicDrawableSpan) {
-					int start = ((Spannable) text).getSpanStart(span);
-					int end = ((Spannable) text).getSpanEnd(span);
-					obWidth = ((DynamicDrawableSpan) span).getSize(getPaint(), text, start, end, mSpanFmInt);
-					obHeight = Math.abs(mSpanFmInt.top) + Math.abs(mSpanFmInt.bottom);
-					if (obHeight > lineHeight) {
-						lineHeight = obHeight;
-					}
-				} else if (span instanceof BackgroundColorSpan) {
-					String str = ((SpanObject) ob).source.toString();
-					obWidth = paint.measureText(str);
-					obHeight = textSize;
-
-					//如果太长,拆分
-					int k = str.length() - 1;
-					while (width - drawedWidth < obWidth) {
-						obWidth = paint.measureText(str.substring(0, k--));
-					}
-					if (k < str.length() - 1) {
-						splitFlag = true;
-						SpanObject so1 = new SpanObject();
-						so1.start = ((SpanObject) ob).start;
-						so1.end = so1.start + k;
-						so1.source = str.substring(0, k + 1);
-						so1.span = ((SpanObject) ob).span;
-
-						SpanObject so2 = new SpanObject();
-						so2.start = so1.end;
-						so2.end = ((SpanObject) ob).end;
-						so2.source = str.substring(k + 1, str.length());
-						so2.span = ((SpanObject) ob).span;
-
-						ob = so1;
-						obList.set(i, so2);
-						i--;
-					}
-				}//做字符串处理
-				else {
-					String str = ((SpanObject) ob).source.toString();
-					obWidth = paint.measureText(str);
-					obHeight = textSize;
-				}
-			}
-
-			//这一行满了，存入contentList,新起一行
-			if (width - drawedWidth < obWidth || splitFlag) {
-				splitFlag = false;
-				contentList.add(line);
-
-				if (drawedWidth > lineWidthMax) {
-					lineWidthMax = drawedWidth;
-				}
-				drawedWidth = 0;
-				height += line.height + lineSpacing;
-
-				lineHeight = obHeight;
-
-				line = new LINE();
-			}
-
-			drawedWidth += obWidth;
-
-			if (ob instanceof String && line.line.size() > 0 && (line.line.get(line.line.size() - 1) instanceof String)) {
-				int size = line.line.size();
-				sb = new StringBuilder();
-				sb.append(line.line.get(size - 1));
-				sb.append(ob);
-				ob = sb.toString();
-				obWidth = obWidth + line.widthList.get(size - 1);
-				line.line.set(size - 1, ob);
-				line.widthList.set(size - 1, (int) obWidth);
-				line.height = (int) lineHeight;
-
-			} else {
-				line.line.add(ob);
-				line.widthList.add((int) obWidth);
-				line.height = (int) lineHeight;
-			}
-
-		}
-
-		if (drawedWidth > lineWidthMax) {
-			lineWidthMax = drawedWidth;
-		}
-
-		if (line != null && line.line.size() > 0) {
-			contentList.add(line);
-			height += lineHeight + lineSpacing;
-		}
-		if (contentList.size() <= 1) {
-			oneLineWidth = (int) drawedWidth + leftPadding + rightPadding;
-			height = lineSpacing + lineHeight + lineSpacing;
-		}
-
-		cacheData(width, (int) height);
-		return (int) height;
-	}
-
-	/**
-	 * 获取缓存的测量数据，避免多次重复测量
-	 *
-	 * @param text
-	 * @param width
-	 * @return height
-	 */
-	@SuppressWarnings("unchecked")
-	private int getCachedData(String text, int width) {
-		SoftReference<MeasuredData> cache = measuredData.get(text);
-		if (cache == null) {
-			return -1;
-		}
-		MeasuredData md = cache.get();
-		if (md != null && md.textSize == this.getTextSize() && width == md.width) {
-			lineWidthMax = md.lineWidthMax;
-			contentList = (ArrayList<LINE>) md.contentList.clone();
-			oneLineWidth = md.oneLineWidth;
-
-			StringBuilder sb = new StringBuilder();
-			for (int i = 0; i < contentList.size(); i++) {
-				LINE line = contentList.get(i);
-				sb.append(line.toString());
-			}
-			return md.measuredHeight;
-		} else {
-			return -1;
-		}
-	}
-
-	/**
-	 * 缓存已测量的数据
-	 *
-	 * @param width
-	 * @param height
-	 */
-	@SuppressWarnings("unchecked")
-	private void cacheData(int width, int height) {
-		MeasuredData md = new MeasuredData();
-		md.contentList = (ArrayList<LINE>) contentList.clone();
-		md.textSize = this.getTextSize();
-		md.lineWidthMax = lineWidthMax;
-		md.oneLineWidth = oneLineWidth;
-		md.measuredHeight = height;
-		md.width = width;
-		md.hashIndex = ++hashIndex;
-
-		StringBuilder sb = new StringBuilder();
-		for (int i = 0; i < contentList.size(); i++) {
-			LINE line = contentList.get(i);
-			sb.append(line.toString());
-		}
-
-		SoftReference<MeasuredData> cache = new SoftReference<MeasuredData>(md);
-		measuredData.put(text.toString(), cache);
-	}
-
-	/**
-	 * 用本函数代替{@link #setText(CharSequence)}
-	 *
-	 * @param cs
-	 */
-	public void setMText(CharSequence cs) {
-		text = cs;
-
-		obList.clear();
-
-		ArrayList<SpanObject> isList = new ArrayList<SpanObject>();
-		useDefault = false;
-
-		if (cs instanceof Spannable) {
-			CharacterStyle[] spans = ((Spannable) cs).getSpans(0, cs.length(), CharacterStyle.class);
-			for (int i = 0; i < spans.length; i++) {
-				int s = ((Spannable) cs).getSpanStart(spans[i]);
-				int e = ((Spannable) cs).getSpanEnd(spans[i]);
-				SpanObject iS = new SpanObject();
-				iS.span = spans[i];
-				iS.start = s;
-				iS.end = e;
-				iS.source = cs.subSequence(s, e);
-				isList.add(iS);
-			}
-		}
-
-		//对span进行排序，以免不同种类的span位置错乱
-		SpanObject[] spanArray = new SpanObject[isList.size()];
-		isList.toArray(spanArray);
-		Arrays.sort(spanArray, 0, spanArray.length, new SpanObjectComparator());
-		isList.clear();
-		for (int i = 0; i < spanArray.length; i++) {
-			isList.add(spanArray[i]);
-		}
-
-		String str = cs.toString();
-
-		for (int i = 0, j = 0; i < cs.length(); ) {
-			if (j < isList.size()) {
-				SpanObject is = isList.get(j);
-				if (i < is.start) {
-					Integer cp = str.codePointAt(i);
-					//支持增补字符
-					if (Character.isSupplementaryCodePoint(cp)) {
-						i += 2;
-					} else {
-						i++;
-					}
-
-					obList.add(new String(Character.toChars(cp)));
-
-				} else if (i >= is.start) {
-					obList.add(is);
-					j++;
-					i = is.end;
-				}
-			} else {
-				Integer cp = str.codePointAt(i);
-				if (Character.isSupplementaryCodePoint(cp)) {
-					i += 2;
-				} else {
-					i++;
-				}
-
-				obList.add(new String(Character.toChars(cp)));
-			}
-		}
-
-		requestLayout();
-	}
-
-	public void setUseDefault(boolean useDefault) {
-		this.useDefault = useDefault;
-		if (useDefault) {
-			this.setText(text);
-			this.setTextColor(textColor);
-		}
-	}
-
-	/**
-	 * 设置行距
-	 *
-	 * @param lineSpacingDP 行距，单位dp
-	 */
-	public void setLineSpacingDP(int lineSpacingDP) {
-		this.lineSpacingDP = lineSpacingDP;
-		lineSpacing = dip2px(context, lineSpacingDP);
-	}
-
-	/**
-	 * 获取行距
-	 *
-	 * @return 行距，单位dp
-	 */
-	public int getLineSpacingDP() {
-		return lineSpacingDP;
-	}
-
-	/**
-	 * @author huangwei
-	 * @功能: 存储Span对象及相关信息
-	 * @2014年5月27日
-	 * @下午5:21:37
-	 */
-	class SpanObject {
-		public Object span;
-		public int start;
-		public int end;
-		public CharSequence source;
-	}
-
-	/**
-	 * @author huangwei
-	 * @功能: 对SpanObject进行排序
-	 * @2014年6月4日
-	 * @下午5:21:30
-	 */
-	class SpanObjectComparator implements Comparator<SpanObject> {
-		@Override
-		public int compare(SpanObject lhs, SpanObject rhs) {
-
-			return lhs.start - rhs.start;
-		}
-	}
-
-	/**
-	 * @author huangwei
-	 * @功能: 存储测量好的一行数据
-	 * @2014年5月27日
-	 * @下午5:22:12
-	 */
-	class LINE {
-		public ArrayList<Object> line = new ArrayList<Object>();
-		public ArrayList<Integer> widthList = new ArrayList<Integer>();
-		public int height;
-
-		@Override
-		public String toString() {
-			StringBuilder sb = new StringBuilder("height:" + height + "   ");
-			for (int i = 0; i < line.size(); i++) {
-				sb.append(line.get(i) + ":" + widthList.get(i));
-			}
-			return sb.toString();
-		}
-	}
-
-	/**
-	 * @author huangwei
-	 * @功能: 缓存的数据
-	 * @2014年5月27日
-	 * @下午5:22:25
-	 */
-	class MeasuredData {
-		public int measuredHeight;
-		public float textSize;
-		public int width;
-		public float lineWidthMax;
-		public int oneLineWidth;
-		public int hashIndex;
-		ArrayList<LINE> contentList;
-	}
+public class MTextView extends TextView {
+    /**
+     * 缓存测量过的数据
+     */
+    private static HashMap<String, SoftReference<MeasuredData>> measuredData = new HashMap<String, SoftReference<MeasuredData>>();
+    private static int hashIndex = 0;
+    /**
+     * 存储当前文本内容，每个item为一行
+     */
+    ArrayList<LINE> contentList = new ArrayList<LINE>();
+    private Context context;
+    /**
+     * 用于测量字符宽度
+     */
+    private TextPaint paint = new TextPaint();
+    /**
+     * 用于测量span高度
+     */
+    private Paint.FontMetricsInt mSpanFmInt = new Paint.FontMetricsInt();
+    /**
+     * 临时使用,以免在onDraw中反复生产新对象
+     */
+    private FontMetrics mFontMetrics = new FontMetrics();
+
+    //	private float lineSpacingMult = 0.5f;
+    private int textColor = Color.BLACK;
+    //行距
+    private float lineSpacing;
+    private int lineSpacingDP = 5;
+    /**
+     * 段间距,-1为默认
+     */
+    private int paragraphSpacing = -1;
+    /**
+     * 最大宽度
+     */
+    private int maxWidth;
+    /**
+     * 只有一行时的宽度
+     */
+    private int oneLineWidth = -1;
+    /**
+     * 已绘的行中最宽的一行的宽度
+     */
+    private float lineWidthMax = -1;
+    /**
+     * 存储当前文本内容,每个item为一个字符或者一个SpanObject
+     */
+    private ArrayList<Object> obList = new ArrayList<Object>();
+    /**
+     * 是否使用默认{@link #onMeasure(int, int)}和{@link #onDraw(android.graphics.Canvas)}
+     */
+    private boolean useDefault = false;
+    protected CharSequence text = "";
+
+    private int minHeight;
+    /**
+     * 用以获取屏幕高宽
+     */
+    private DisplayMetrics displayMetrics;
+    /**
+     * {@link android.text.style.BackgroundColorSpan}用
+     */
+    private Paint textBgColorPaint = new Paint();
+    /**
+     * {@link android.text.style.BackgroundColorSpan}用
+     */
+    private Rect textBgColorRect = new Rect();
+
+    public MTextView(Context context) {
+        super(context);
+        init(context);
+    }
+
+    public MTextView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init(context);
+    }
+
+    public MTextView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        init(context);
+    }
+
+
+    public void init(Context context) {
+        this.context = context;
+        paint.setAntiAlias(true);
+        lineSpacing = dip2px(context, lineSpacingDP);
+        minHeight = dip2px(context, 30);
+
+        displayMetrics = new DisplayMetrics();
+    }
+
+    public static int px2sp(Context context, float pxValue) {
+        final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
+        return (int) (pxValue / fontScale + 0.5f);
+    }
+
+    /**
+     * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
+     */
+    public static int dip2px(Context context, float dpValue) {
+        final float scale = context.getResources().getDisplayMetrics().density;
+        return (int) (dpValue * scale + 0.5f);
+    }
+
+    @Override
+    public void setMaxWidth(int maxpixels) {
+        super.setMaxWidth(maxpixels);
+        maxWidth = maxpixels;
+    }
+
+    @Override
+    public void setMinHeight(int minHeight) {
+        super.setMinHeight(minHeight);
+        this.minHeight = minHeight;
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        if (useDefault) {
+            super.onMeasure(widthMeasureSpec, heightMeasureSpec);
+            return;
+        }
+        int width = 0, height = 0;
+
+        int widthMode = MeasureSpec.getMode(widthMeasureSpec);
+        int heightMode = MeasureSpec.getMode(heightMeasureSpec);
+        int widthSize = MeasureSpec.getSize(widthMeasureSpec);
+        int heightSize = MeasureSpec.getSize(heightMeasureSpec);
+
+        switch (widthMode) {
+            case MeasureSpec.EXACTLY:
+                width = widthSize;
+                break;
+            case MeasureSpec.AT_MOST:
+                width = widthSize;
+                break;
+            case MeasureSpec.UNSPECIFIED:
+
+                ((Activity) context).getWindowManager().getDefaultDisplay().getMetrics(displayMetrics);
+                width = displayMetrics.widthPixels;
+                break;
+            default:
+                break;
+        }
+        if (maxWidth > 0) {
+            width = Math.min(width, maxWidth);
+        }
+
+        paint.setTextSize(this.getTextSize());
+        paint.setColor(textColor);
+        int realHeight = measureContentHeight((int) width);
+
+        //如果实际行宽少于预定的宽度，减少行宽以使其内容横向居中
+        int leftPadding = getCompoundPaddingLeft();
+        int rightPadding = getCompoundPaddingRight();
+        width = Math.min(width, (int) lineWidthMax + leftPadding + rightPadding);
+
+        if (oneLineWidth > -1) {
+            width = oneLineWidth;
+        }
+        switch (heightMode) {
+            case MeasureSpec.EXACTLY:
+                height = heightSize;
+                break;
+            case MeasureSpec.AT_MOST:
+                height = realHeight;
+                break;
+            case MeasureSpec.UNSPECIFIED:
+                height = realHeight;
+                break;
+            default:
+                break;
+        }
+
+        height += getCompoundPaddingTop() + getCompoundPaddingBottom();
+
+        height = Math.max(height, minHeight);
+
+        setMeasuredDimension(width, height);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        if (useDefault) {
+            super.onDraw(canvas);
+            return;
+        }
+        if (contentList.isEmpty()) {
+            return;
+        }
+        int width;
+
+        Object ob;
+
+        int leftPadding = getCompoundPaddingLeft();
+        int topPadding = getCompoundPaddingTop();
+
+        float height = 0 + topPadding + lineSpacing;
+        //只有一行时
+        if (oneLineWidth != -1) {
+            height = getMeasuredHeight() / 2 - contentList.get(0).height / 2;
+        }
+
+        for (LINE aContentList : contentList) {
+            //绘制一行
+            float realDrawedWidth = leftPadding;
+            /** 是否换新段落*/
+            boolean newParagraph = false;
+            for (int j = 0; j < aContentList.line.size(); j++) {
+                ob = aContentList.line.get(j);
+                width = aContentList.widthList.get(j);
+
+                paint.getFontMetrics(mFontMetrics);
+                float x = realDrawedWidth;
+                float y = height + aContentList.height - paint.getFontMetrics().descent;
+                float top = y - aContentList.height;
+                float bottom = y + mFontMetrics.descent;
+                if (ob instanceof String) {
+                    canvas.drawText((String) ob, realDrawedWidth, y, paint);
+                    realDrawedWidth += width;
+                    if(((String)ob).endsWith("\n") && j == aContentList.line.size()-1){
+                        newParagraph = true;
+                    }
+                } else if (ob instanceof SpanObject) {
+                    Object span = ((SpanObject) ob).span;
+                    if (span instanceof DynamicDrawableSpan) {
+
+                        int start = ((Spannable) text).getSpanStart(span);
+                        int end = ((Spannable) text).getSpanEnd(span);
+                        ((DynamicDrawableSpan) span).draw(canvas, text, start, end, (int) x, (int) top, (int) y, (int) bottom, paint);
+                        realDrawedWidth += width;
+                    } else if (span instanceof BackgroundColorSpan) {
+
+                        textBgColorPaint.setColor(((BackgroundColorSpan) span).getBackgroundColor());
+                        textBgColorPaint.setStyle(Style.FILL);
+                        textBgColorRect.left = (int) realDrawedWidth;
+                        int textHeight = (int) getTextSize();
+                        textBgColorRect.top = (int) (height + aContentList.height - textHeight - mFontMetrics.descent);
+                        textBgColorRect.right = textBgColorRect.left + width;
+                        textBgColorRect.bottom = (int) (height + aContentList.height + lineSpacing - mFontMetrics.descent);
+                        canvas.drawRect(textBgColorRect, textBgColorPaint);
+                        canvas.drawText(((SpanObject) ob).source.toString(), realDrawedWidth, height + aContentList.height - mFontMetrics.descent, paint);
+                        realDrawedWidth += width;
+                    } else//做字符串处理
+                    {
+                        canvas.drawText(((SpanObject) ob).source.toString(), realDrawedWidth, height + aContentList.height - mFontMetrics.descent, paint);
+                        realDrawedWidth += width;
+                    }
+                }
+
+            }
+            //如果要绘制段间距
+            if(newParagraph){
+                height += aContentList.height + paragraphSpacing;
+            }else{
+                height += aContentList.height + lineSpacing;
+            }
+        }
+
+    }
+
+    @Override
+    public void setTextColor(int color) {
+        super.setTextColor(color);
+        textColor = color;
+    }
+
+    /**
+     * 用于带ImageSpan的文本内容所占高度测量
+     *
+     * @param width 预定的宽度
+     * @return 所需的高度
+     */
+    private int measureContentHeight(int width) {
+        int cachedHeight = getCachedData(text.toString(), width);
+
+        if (cachedHeight > 0) {
+            return cachedHeight;
+        }
+
+        // 已绘的宽度
+        float obWidth = 0;
+        float obHeight = 0;
+
+        float textSize = this.getTextSize();
+        FontMetrics fontMetrics = paint.getFontMetrics();
+        //行高
+        float lineHeight = fontMetrics.bottom - fontMetrics.top;
+        //计算出的所需高度
+        float height = lineSpacing;
+
+        int leftPadding = getCompoundPaddingLeft();
+        int rightPadding = getCompoundPaddingRight();
+
+        float drawedWidth = 0;
+
+        boolean splitFlag = false;//BackgroundColorSpan拆分用
+
+        width = width - leftPadding - rightPadding;
+
+        oneLineWidth = -1;
+
+        contentList.clear();
+
+        StringBuilder sb;
+
+        LINE line = new LINE();
+
+        for (int i = 0; i < obList.size(); i++) {
+            Object ob = obList.get(i);
+
+            if (ob instanceof String) {
+                obWidth = paint.measureText((String) ob);
+                obHeight = textSize;
+                if ("\n".equals(ob)) { //遇到"\n"则换行
+                    obWidth = width - drawedWidth;
+                }
+            } else if (ob instanceof SpanObject) {
+                Object span = ((SpanObject) ob).span;
+                if (span instanceof DynamicDrawableSpan) {
+                    int start = ((Spannable) text).getSpanStart(span);
+                    int end = ((Spannable) text).getSpanEnd(span);
+                    obWidth = ((DynamicDrawableSpan) span).getSize(getPaint(), text, start, end, mSpanFmInt);
+                    obHeight = Math.abs(mSpanFmInt.top) + Math.abs(mSpanFmInt.bottom);
+                    if (obHeight > lineHeight) {
+                        lineHeight = obHeight;
+                    }
+                } else if (span instanceof BackgroundColorSpan) {
+                    String str = ((SpanObject) ob).source.toString();
+                    obWidth = paint.measureText(str);
+                    obHeight = textSize;
+
+                    //如果太长,拆分
+                    int k = str.length() - 1;
+                    while (width - drawedWidth < obWidth) {
+                        obWidth = paint.measureText(str.substring(0, k--));
+                    }
+                    if (k < str.length() - 1) {
+                        splitFlag = true;
+                        SpanObject so1 = new SpanObject();
+                        so1.start = ((SpanObject) ob).start;
+                        so1.end = so1.start + k;
+                        so1.source = str.substring(0, k + 1);
+                        so1.span = ((SpanObject) ob).span;
+
+                        SpanObject so2 = new SpanObject();
+                        so2.start = so1.end;
+                        so2.end = ((SpanObject) ob).end;
+                        so2.source = str.substring(k + 1, str.length());
+                        so2.span = ((SpanObject) ob).span;
+
+                        ob = so1;
+                        obList.set(i, so2);
+                        i--;
+                    }
+                }//做字符串处理
+                else {
+                    String str = ((SpanObject) ob).source.toString();
+                    obWidth = paint.measureText(str);
+                    obHeight = textSize;
+                }
+            }
+
+            //这一行满了，存入contentList,新起一行
+            if (width - drawedWidth < obWidth || splitFlag) {
+                splitFlag = false;
+                contentList.add(line);
+
+                if (drawedWidth > lineWidthMax) {
+                    lineWidthMax = drawedWidth;
+                }
+                drawedWidth = 0;
+                //判断是否有分段
+                int objNum = line.line.size();
+                if (paragraphSpacing > 0
+                        && objNum > 0
+                        && line.line.get(objNum - 1) instanceof String
+                        && "\n".equals(line.line.get(objNum - 1))) {
+                    height += line.height + paragraphSpacing;
+                } else {
+                    height += line.height + lineSpacing;
+                }
+
+                lineHeight = obHeight;
+
+                line = new LINE();
+            }
+
+            drawedWidth += obWidth;
+
+            if (ob instanceof String && line.line.size() > 0 && (line.line.get(line.line.size() - 1) instanceof String)) {
+                int size = line.line.size();
+                sb = new StringBuilder();
+                sb.append(line.line.get(size - 1));
+                sb.append(ob);
+                ob = sb.toString();
+                obWidth = obWidth + line.widthList.get(size - 1);
+                line.line.set(size - 1, ob);
+                line.widthList.set(size - 1, (int) obWidth);
+                line.height = (int) lineHeight;
+            } else {
+                line.line.add(ob);
+                line.widthList.add((int) obWidth);
+                line.height = (int) lineHeight;
+            }
+
+        }
+
+        if (drawedWidth > lineWidthMax) {
+            lineWidthMax = drawedWidth;
+        }
+
+        if (line != null && line.line.size() > 0) {
+            contentList.add(line);
+            height += lineHeight + lineSpacing;
+        }
+        if (contentList.size() <= 1) {
+            oneLineWidth = (int) drawedWidth + leftPadding + rightPadding;
+            height = lineSpacing + lineHeight + lineSpacing;
+        }
+
+        cacheData(width, (int) height);
+        return (int) height;
+    }
+
+    /**
+     * 获取缓存的测量数据，避免多次重复测量
+     *
+     * @param text
+     * @param width
+     * @return height
+     */
+    @SuppressWarnings("unchecked")
+    private int getCachedData(String text, int width) {
+        SoftReference<MeasuredData> cache = measuredData.get(text);
+        if (cache == null) {
+            return -1;
+        }
+        MeasuredData md = cache.get();
+        if (md != null && md.textSize == this.getTextSize() && width == md.width) {
+            lineWidthMax = md.lineWidthMax;
+            contentList = (ArrayList<LINE>) md.contentList.clone();
+            oneLineWidth = md.oneLineWidth;
+
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < contentList.size(); i++) {
+                LINE line = contentList.get(i);
+                sb.append(line.toString());
+            }
+            return md.measuredHeight;
+        } else {
+            return -1;
+        }
+    }
+
+    /**
+     * 缓存已测量的数据
+     *
+     * @param width
+     * @param height
+     */
+    @SuppressWarnings("unchecked")
+    private void cacheData(int width, int height) {
+        MeasuredData md = new MeasuredData();
+        md.contentList = (ArrayList<LINE>) contentList.clone();
+        md.textSize = this.getTextSize();
+        md.lineWidthMax = lineWidthMax;
+        md.oneLineWidth = oneLineWidth;
+        md.measuredHeight = height;
+        md.width = width;
+        md.hashIndex = ++hashIndex;
+
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < contentList.size(); i++) {
+            LINE line = contentList.get(i);
+            sb.append(line.toString());
+        }
+
+        SoftReference<MeasuredData> cache = new SoftReference<MeasuredData>(md);
+        measuredData.put(text.toString(), cache);
+    }
+
+    /**
+     * 用本函数代替{@link #setText(CharSequence)}
+     *
+     * @param cs
+     */
+    public void setMText(CharSequence cs) {
+        text = cs;
+
+        obList.clear();
+
+        ArrayList<SpanObject> isList = new ArrayList<SpanObject>();
+        useDefault = false;
+
+        if (cs instanceof Spannable) {
+            CharacterStyle[] spans = ((Spannable) cs).getSpans(0, cs.length(), CharacterStyle.class);
+            for (int i = 0; i < spans.length; i++) {
+                int s = ((Spannable) cs).getSpanStart(spans[i]);
+                int e = ((Spannable) cs).getSpanEnd(spans[i]);
+                SpanObject iS = new SpanObject();
+                iS.span = spans[i];
+                iS.start = s;
+                iS.end = e;
+                iS.source = cs.subSequence(s, e);
+                isList.add(iS);
+            }
+        }
+
+        //对span进行排序，以免不同种类的span位置错乱
+        SpanObject[] spanArray = new SpanObject[isList.size()];
+        isList.toArray(spanArray);
+        Arrays.sort(spanArray, 0, spanArray.length, new SpanObjectComparator());
+        isList.clear();
+        for (int i = 0; i < spanArray.length; i++) {
+            isList.add(spanArray[i]);
+        }
+
+        String str = cs.toString();
+
+        for (int i = 0, j = 0; i < cs.length(); ) {
+            if (j < isList.size()) {
+                SpanObject is = isList.get(j);
+                if (i < is.start) {
+                    Integer cp = str.codePointAt(i);
+                    //支持增补字符
+                    if (Character.isSupplementaryCodePoint(cp)) {
+                        i += 2;
+                    } else {
+                        i++;
+                    }
+
+                    obList.add(new String(Character.toChars(cp)));
+
+                } else if (i >= is.start) {
+                    obList.add(is);
+                    j++;
+                    i = is.end;
+                }
+            } else {
+                Integer cp = str.codePointAt(i);
+                if (Character.isSupplementaryCodePoint(cp)) {
+                    i += 2;
+                } else {
+                    i++;
+                }
+
+                obList.add(new String(Character.toChars(cp)));
+            }
+        }
+
+        requestLayout();
+    }
+
+    public void setUseDefault(boolean useDefault) {
+        this.useDefault = useDefault;
+        if (useDefault) {
+            this.setText(text);
+            this.setTextColor(textColor);
+        }
+    }
+
+    /**
+     * 设置行距
+     *
+     * @param lineSpacingDP 行距，单位dp
+     */
+    public void setLineSpacingDP(int lineSpacingDP) {
+        this.lineSpacingDP = lineSpacingDP;
+        lineSpacing = dip2px(context, lineSpacingDP);
+    }
+
+    public void setParagraphSpacingDP(int paragraphSpacingDP) {
+        paragraphSpacing = dip2px(context, paragraphSpacingDP);
+    }
+
+    /**
+     * 获取行距
+     *
+     * @return 行距，单位dp
+     */
+    public int getLineSpacingDP() {
+        return lineSpacingDP;
+    }
+
+    /**
+     * @author huangwei
+     * @功能: 存储Span对象及相关信息
+     * @2014年5月27日
+     * @下午5:21:37
+     */
+    class SpanObject {
+        public Object span;
+        public int start;
+        public int end;
+        public CharSequence source;
+    }
+
+    /**
+     * @author huangwei
+     * @功能: 对SpanObject进行排序
+     * @2014年6月4日
+     * @下午5:21:30
+     */
+    class SpanObjectComparator implements Comparator<SpanObject> {
+        @Override
+        public int compare(SpanObject lhs, SpanObject rhs) {
+
+            return lhs.start - rhs.start;
+        }
+    }
+
+    /**
+     * @author huangwei
+     * @功能: 存储测量好的一行数据
+     * @2014年5月27日
+     * @下午5:22:12
+     */
+    class LINE {
+        public ArrayList<Object> line = new ArrayList<Object>();
+        public ArrayList<Integer> widthList = new ArrayList<Integer>();
+        public float height;
+
+        @Override
+        public String toString() {
+            StringBuilder sb = new StringBuilder("height:" + height + "   ");
+            for (int i = 0; i < line.size(); i++) {
+                sb.append(line.get(i) + ":" + widthList.get(i));
+            }
+            return sb.toString();
+        }
+    }
+
+    /**
+     * @author huangwei
+     * @功能: 缓存的数据
+     * @2014年5月27日
+     * @下午5:22:25
+     */
+    class MeasuredData {
+        public int measuredHeight;
+        public float textSize;
+        public int width;
+        public float lineWidthMax;
+        public int oneLineWidth;
+        public int hashIndex;
+        ArrayList<LINE> contentList;
+    }
 }
\ No newline at end of file