rename & readme

GraffitiLib/src/main/java/cn/hzw/graffiti/DrawUtil.java

@@ -138,7 +138,7 @@ public class DrawUtil {
     }
 
     // xy为在涂鸦中旋转后的坐标，该函数逆向计算出未旋转前的坐标
-    public static float[] restoreRotatePointInGriffiti(int nowDegree, int oldDegree, float x, float y, float mOriginalPivotX, float mOriginalPivotY) {
+    public static float[] restoreRotatePointInGraffiti(int nowDegree, int oldDegree, float x, float y, float mOriginalPivotX, float mOriginalPivotY) {
         int degree = nowDegree - oldDegree;
         if (degree != 0) {
             float px = mOriginalPivotX, py = mOriginalPivotY;

GraffitiLib/src/main/java/cn/hzw/graffiti/GraffitiText.java

@@ -57,7 +57,7 @@ public class GraffitiText implements Undoable {
     }
 
     public void setXy(int currentRotate, float x, float y) {
-        float[] xy = restoreRotatePointInGriffiti(currentRotate, mRotateDegree, x, y, mPivotX, mPivotY);
+        float[] xy = restoreRotatePointInGraffiti(currentRotate, mRotateDegree, x, y, mPivotX, mPivotY);
         mX = xy[0];
         mY = xy[1];
     }

README.md

@@ -116,6 +116,8 @@ public static class GraffitiParams implements Parcelable {
 
   [android图片涂鸦，具有设置画笔，撤销，缩放移动等功能(二)](http://blog.csdn.net/u012964944/article/details/52769273)
 
+  [android图片涂鸦——旋转与文字功能的实现原理](http://blog.csdn.net/u012964944/article/details/62889219)
+
 
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