Null pointer exception error set

1.dataManager when get what thing null pointer, most likely is not initialized, even if the global variable is initialized in another place, here also need to call.

2. Error loading picture
This.mImageLoader.get (Imgurl,listener);
All three objects have a value, but a null pointer is reported.
To see if the object you want to use when Imageloader is created is empty.
#我出过这样的错, the problem is the address did not write ":", careless killed people!

3. Null pointer
Load the view when the null pointer, not just to see if find is not the corresponding control, but also to see the set of the page is not wrong.

4. Initialize the Async method before calling it! Asynchronous is to do their own, so you have to give him the initial value AH. Otherwise, the pointer will be empty. Especially remember Mdata (List) and Requestqueue.
Adapter Don't worry, he will call the Notifychanged method to tell the main thread when the change is complete.

Null pointer exception error set