增加启动涂鸦界面的接口

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

@@ -2,6 +2,7 @@ package cn.hzw.graffiti;
 
 import android.app.Activity;
 import android.app.AlertDialog;
+import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.graphics.Bitmap;
@@ -30,6 +31,19 @@ import cn.forward.androids.utils.ThreadUtil;
  */
 public class GraffitiActivity extends Activity {
 
+
+    /**
+     * 启动涂鸦界面
+     * @param activity
+     * @param imagePath 图片路径
+     * @param requestCode startActivityForResult的请求码
+     */
+    public static void startActivityForResult(Activity activity, String imagePath, int requestCode) {
+        Intent intent = new Intent(activity, GraffitiActivity.class);
+        intent.putExtra(GraffitiActivity.KEY_IMAGE_PATH, imagePath);
+        activity.startActivityForResult(intent, requestCode);
+    }
+
     public static final String KEY_IMAGE_PATH = "key_image_path";
     private String mImagePath;
     private Bitmap mBitmap;
@@ -248,6 +262,7 @@ public class GraffitiActivity extends Activity {
 
     /**
      * 计算两指间的距离
+     *
      * @param event
      * @return
      */
@@ -388,10 +403,10 @@ public class GraffitiActivity extends Activity {
     @Override
     public void onBackPressed() {
 
-        if(mBtnMovePic.isSelected()){
+        if (mBtnMovePic.isSelected()) {
             mBtnMovePic.setSelected(false);
             return;
-        }else{
+        } else {
             findViewById(R.id.btn_back).performClick();
         }
 

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

@@ -434,7 +434,6 @@ public class GraffitiView extends View {
     public final float toTransY(float touchY, float graffitiY) {
         return -graffitiY * (mPrivateScale * mScale) + touchY - mCentreTranY;
     }
-
     /**
      * 将屏幕触摸坐标x转换成在canvas中的坐标
      */
@@ -449,14 +448,15 @@ public class GraffitiView extends View {
         return (y) / (mPrivateScale * mScale);
     }
 
+
     private static class GraffitiPath {
         Pen mPen; // 画笔类型
         Shape mShape; // 画笔形状
         float mStrokeWidth; // 大小
         GraffitiColor mColor; // 颜色
         Path mPath; // 画笔的路径
-        float mSx, mSy; // 起始坐标（手指点击）
-        float mDx, mDy; // 终止坐标（手指触摸）
+        float mSx, mSy; // 映射后的起始坐标，（手指点击）
+        float mDx, mDy; // 映射后的终止坐标，（手指抬起）
         Matrix mMatrix; //　仿制图片的偏移矩阵
 
         static GraffitiPath toShape(Pen pen, Shape shape, float width, GraffitiColor color,

README.md

@@ -15,6 +15,32 @@
 
     在涂鸦的过程中，可以自由地通过手势缩放和移动图片，以便更细微地涂鸦，同时在多次缩放后，可点击“O”按钮，快速居中图片。
 
+### 使用
+
+```
+public class GraffitiActivity extends Activity {
+	/**
+	* 启动涂鸦界面
+	* @param activity
+	* @param imagePath 图片路径
+	* @param requestCode startActivityForResult的请求码
+	*/
+	public static void startActivityForResult(Activity activity, String imagePath, int requestCode);
+}
+```
+### 界面
+
  ![IMG](http://s1.sinaimg.cn/orignal/003eBWOtzy757JQaYiA00&690)
  ![IMG](http://s16.sinaimg.cn/orignal/003eBWOtzy757JPIatxbf&690)
  ![IMG](http://s1.sinaimg.cn/orignal/003eBWOtzy757JQ7CG470&690)
+
+### 相关文章
+
+  * 功能介绍：
+
+   [android图片涂鸦，具有设置画笔，撤销，缩放移动等功能(一)](http://blog.csdn.net/u012964944/article/details/52661940)
+
+
+  *　原理介绍：
+
+  [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)
\ No newline at end of file

app/src/main/java/cn/hzw/graffitidemo/MainActivity.java

@@ -42,9 +42,10 @@ public class MainActivity extends Activity {
             }
             ArrayList<String> list = data.getStringArrayListExtra(ImageSelectorActivity.KEY_PATH_LIST);
             if (list != null && list.size() > 0) {
-                Intent intent = new Intent(getApplicationContext(), GraffitiActivity.class);
+                /*Intent intent = new Intent(getApplicationContext(), GraffitiActivity.class);
                 intent.putExtra(GraffitiActivity.KEY_IMAGE_PATH, list.get(0));
-                startActivityForResult(intent, REQ_CODE_GRAFFITI);
+                startActivityForResult(intent, REQ_CODE_GRAFFITI);*/
+                GraffitiActivity.startActivityForResult(MainActivity.this, list.get(0), REQ_CODE_GRAFFITI);
             }
         } else if (requestCode == REQ_CODE_GRAFFITI) {
             if (data == null) {