修复firebase反馈的空指针问题

common/src/main/java/com/yunbao/common/glide/ImgLoader.java

@@ -131,7 +131,7 @@ public class ImgLoader {
     }
 
     public static void displayAvatar(Context context, String url, ImageView imageView, int width, int height) {
-        if (!contextIsExist(context)) {
+        if (!contextIsExist(context) || imageView == null) {
             return;
         }
 

common/src/main/java/com/yunbao/common/utils/StringUtil.java

@@ -147,7 +147,7 @@ public class StringUtil {
         return sStringBuilder.toString();
     }
 
-    public static boolean isEmpty(String bgColor) {
-        return bgColor == null || "".equals(bgColor.trim()) || bgColor.trim().length() == 0;
+    public static boolean isEmpty(String str) {
+        return str == null || "".equals(str.trim()) || str.trim().length() == 0;
     }
 }