防止控制针异常

sobot_utils/src/main/java/com/sobot/utils/SobotImageUtils.java

@@ -508,7 +508,7 @@ public class SobotImageUtils {
                     is = contentResolver.openInputStream(uri);
                     File cache = new File(context.getExternalCacheDir().getAbsolutePath(), Math.round((Math.random() + 1) * 1000) + displayName);
                     fos = new FileOutputStream(cache);
-                    SobotIOUtils.copyFileWithStream(fos,is);
+                    SobotIOUtils.copyFileWithStream(fos, is);
                     file = cache;
                 } catch (IOException e) {
                     e.printStackTrace();
@@ -530,6 +530,10 @@ public class SobotImageUtils {
                 }
             }
         }
-        return file.getAbsolutePath();
+        if (file == null) {
+            return null;
+        } else {
+            return file.getAbsolutePath();
+        }
     }
 }
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