diff --git a/~$$顺序图.~vsdx b/~$$顺序图.~vsdx
deleted file mode 100644
index 9756b0f..0000000
Binary files a/~$$顺序图.~vsdx and /dev/null differ
diff --git a/代码/在这里3.0/bin/classes/com/stone/util/Util$1.class b/代码/在这里3.0/bin/classes/com/stone/util/Util$1.class
index 97c3472..e1c38f2 100644
Binary files a/代码/在这里3.0/bin/classes/com/stone/util/Util$1.class and b/代码/在这里3.0/bin/classes/com/stone/util/Util$1.class differ
diff --git a/代码/在这里3.0/bin/classes/com/stone/util/Util.class b/代码/在这里3.0/bin/classes/com/stone/util/Util.class
index ed1adf0..0b125ae 100644
Binary files a/代码/在这里3.0/bin/classes/com/stone/util/Util.class and b/代码/在这里3.0/bin/classes/com/stone/util/Util.class differ
diff --git a/代码/在这里3.0/src/com/stone/util/Util.java b/代码/在这里3.0/src/com/stone/util/Util.java
index 854f733..bb6f120 100644
--- a/代码/在这里3.0/src/com/stone/util/Util.java
+++ b/代码/在这里3.0/src/com/stone/util/Util.java
@@ -117,8 +117,9 @@ private static final String TAG = "SDK_Sample.Util";
      * @return byte[]
      */
     public static byte[] hexStringToBytes(String hexString) {
+    	byte[] nullreplace=null;
         if (hexString == null || "".equals(hexString)) {
-            return null;
+            return nullreplace;
         }
         hexString = hexString.toUpperCase();
         int length = hexString.length() / 2;
@@ -373,15 +374,19 @@ private static final String TAG = "SDK_Sample.Util";
             Bitmap bitmap = BitmapFactory.decodeStream(stream , null, opts);
             return bitmap;
         } catch (OutOfMemoryError e) {
+			Logger logger = Logger.getLogger("lavasoft"); 
+			logger.log(Level.SEVERE, "sthwrong", e);
             return null;
         } catch (Exception e) {
+			Logger logger = Logger.getLogger("lavasoft"); 
+			logger.log(Level.SEVERE, "sthwrong", e);
             return null;
         }
     }
 
     private static final int MAX_DECODE_PICTURE_SIZE = 1920 * 1440;
 	public static Bitmap extractThumbNail(final String path, final int height, final int width, final boolean crop) {
-		Assert.assertTrue(path != null && !path.equals("") && height > 0 && width > 0);
+		Assert.assertTrue(path != null && !"".equals(path) && height > 0 && width > 0);
 
 		BitmapFactory.Options options = new BitmapFactory.Options();
 
@@ -392,7 +397,6 @@ private static final String TAG = "SDK_Sample.Util";
 				tmp.recycle();
 				tmp = null;
 			}
-
 			Log.d(TAG, "extractThumbNail: round=" + width + "x" + height + ", crop=" + crop);
 			final double beY = options.outHeight * 1.0 / height;
 			final double beX = options.outWidth * 1.0 / width;
@@ -453,6 +457,8 @@ private static final String TAG = "SDK_Sample.Util";
 
 		} catch (final OutOfMemoryError e) {
 			Log.e(TAG, "decode bitmap failed: " + e.getMessage());
+			Logger logger = Logger.getLogger("lavasoft"); 
+			logger.log(Level.SEVERE, "sthwrong", e);
 			options = null;
 		}
 
@@ -461,7 +467,8 @@ private static final String TAG = "SDK_Sample.Util";
 	
 	public static final void showResultDialog(Context context, String msg,
 			String title) {
-		if(msg == null) return;
+		if(msg == null) 
+			return;
 		String rmsg = msg.replace(",", "\n");
 		Log.d("Util", rmsg);
 		new AlertDialog.Builder(context).setTitle(title).setMessage(rmsg)
@@ -480,17 +487,13 @@ private static final String TAG = "SDK_Sample.Util";
 		mProgressDialog = ProgressDialog.show(context, title, message);
 	}
 	
-	public static AlertDialog showConfirmCancelDialog(Context context,
-			String title, String message,
-			DialogInterface.OnClickListener posListener) {
-		AlertDialog dlg = new AlertDialog.Builder(context).setMessage(message)
-				.setPositiveButton("确认", posListener)
-				.setNegativeButton("取消", null).create();
+	public static AlertDialog showConfirmCancelDialog(Context context,String message,DialogInterface.OnClickListener posListener) 
+	{
+		AlertDialog dlg = new AlertDialog.Builder(context).setMessage(message).setPositiveButton("确认", posListener).setNegativeButton("取消", null).create();
 		dlg.setCanceledOnTouchOutside(false);
 		dlg.show();
 		return dlg;
 	}
-
 	public static final void dismissDialog() {
 		if (mProgressDialog != null) {
 			mProgressDialog.dismiss();
@@ -518,7 +521,6 @@ private static final String TAG = "SDK_Sample.Util";
 		activity.runOnUiThread(new Runnable() {
 			@Override
 			public void run() {
-				// TODO Auto-generated method stub
 				if (mToast != null) {
 					mToast.cancel();
 					mToast = null;
@@ -565,10 +567,12 @@ private static final String TAG = "SDK_Sample.Util";
 
 			Log.v(TAG, "image download finished." + imageUri);
         } catch (OutOfMemoryError e) {
-            e.printStackTrace();
+			Logger logger = Logger.getLogger("lavasoft"); 
+			logger.log(Level.SEVERE, "sthwrong", e);
             bitmap = null;
 		} catch (IOException e) {
-			e.printStackTrace();
+			Logger logger = Logger.getLogger("lavasoft"); 
+			logger.log(Level.SEVERE, "sthwrong", e);
 			Log.v(TAG, "getbitmap bmp fail---");
             bitmap = null;
 		}
@@ -585,8 +589,8 @@ private static final String TAG = "SDK_Sample.Util";
     // =兼容android 5.0
     // ==========
 
-    public static String ACTION_OPEN_DOCUMENT = "android.intent.action.OPEN_DOCUMENT";
-    public static int Build_VERSION_KITKAT = 19;
+    public static final String ACTION_OPEN_DOCUMENT = "android.intent.action.OPEN_DOCUMENT";
+    public static final int Build_VERSION_KITKAT = 19;
     public static String getPath(final Context context, final Uri uri) {
 
         final boolean isKitKat = Build.VERSION.SDK_INT >= 19;