1.修改Android Apex Mobile从Service Location返回后点击Check Update Crash。

Apex Mobile/app/src/main/java/com/usai/apex/ApexTrackingApplication.java

@@ -109,6 +109,7 @@ public class ApexTrackingApplication extends Application
 //					isBackground = false;
 //					notifyForeground();
 //				}
+				mCurrentActivity = activity;
 			}
 
 			@Override
@@ -292,9 +293,6 @@ public class ApexTrackingApplication extends Application
 	public void showProgressDialog(String msg) {
 
 		if (mProgressDialog == null) {
-			if (this == null) {
-				return;
-			}
 			mProgressDialog = new ProgressDialog(mCurrentActivity);
 			mProgressDialog.setCancelable(false);