如何在 Fragment 中启用解析本地数据存储

Question

can anyone please help me? I am trying to enable Parse Local Datastore in a fragment but its throwing out an error: java.lang.IllegalStateException: Parse#enableLocalDatastore(Context) must be invoked before Parse#initialize(Context, String, String) . Below is the code I use which works perfectly fine in an Activity but not in Fragment and I know the getActivity context is not null since the second line works.

Parse.enableLocalDatastore(getActivity());
Parse.initialize(getActivity(), DeveloperKey.ParseAppID, DeveloperKey.ParseClientKey);

Answer 1

you have to move your code related to Parse initialization to the Application class. Make class extending Application, add it to manifest and then in the onCreate() of you application call

Parse.enableLocalDatastore(getActivity());
Parse.initialize(getActivity(), DeveloperKey.ParseAppID, DeveloperKey.ParseClientKey);

Answer 2

Reading your logcat error you just need to interchange your code.

 Parse.initialize(getActivity(), DeveloperKey.ParseAppID, DeveloperKey.ParseClientKey);
 Parse.enableLocalDatastore(getActivity());

When your parse is enables after that you'l be able to enable your local database for it.

Answer 3

I realised using pin() automatically saves to the local datastore so there was no need to explicitly use enableLocaldatastore() . With this, I can query from localdatastore and get the cached result.

Answer 4

Parse.enableLocalDatastore(getActivity());

is an old way of enabling local datastore.

Now you have to do like this.

Parse.initialize(new Parse.Configuration.Builder(this)
                .applicationId(getResources().getString(R.string.parse_api_key))
                .clientKey(null)
                .server("YOUR_SERVER_URL/") // The trailing slash is important.
        .enableLocalDataStore().build()
        );

Answer 5

Try upgrading:

implementation "com.github.parse-community.Parse-SDK-Android:parse:x.xx.x" 

To a newer version. Like this:

How android ide did help me out: