CODEWITHSUNDEEP
javaandroid
Jis Maxi
Jis Maxi

Reputation: 226

Show sharedpreference inside RecyclerView Adapter

I have problem to pass context from Activity to Adapter.

I am calling my sharedpreference like this:

    SharedPreferences pref = PreferenceManager
            .getDefaultSharedPreferences(ctx);
    String userObject = pref.getString(key, null);

And this one need context, so i am using : getApplicationContext()

But this not work in the Adapter (RecyclerView), is there someone facing the same issue ?

Adding the adapter into the Manifest file will solve the problem ? (Just a suggestion)

Upvotes: 3

Views: 4813

Answers (3)

Va Fu
Va Fu

Reputation: 103

I suggest you to separate your preference-managing code into singleton class so you can get access to the preferences anywhere, just like this 

public class SharedPreferenceManager {
private static final SharedPreferenceManager ourInstance = new SharedPreferenceManager();

public static SharedPreferenceManager getInstance() {
    return ourInstance;
}

private SharedPreferenceManager() {
}

private SharedPreferences preferences;

public void init(Context ctx) {
    preferences = PreferenceManager.getDefaultSharedPreferences(ctx);
}

public String getValueByKey(String key) {
    return preferences.getString(key, "");
}..other functions....}

you should call the SharedPreferenceManager.getInstance().init(this) in your onCreate() in the activity

and after you can get access to SP wherever you want: SharedPreferenceManager.getInstance().getValueByKey("somekey")

Upvotes: 0

Ratul Bin Tazul
Ratul Bin Tazul

Reputation: 2151

I am not sure what you are asking but here is a solution that I can think of. Pass the context of the calling activity in your adapter through constructor and then use that context.

Context ctx;

public YourAdapter(Context ctx){
    this.ctx = ctx;
}

now in your adapter you can do this

SharedPreferences pref = PreferenceManager
        .getDefaultSharedPreferences(ctx);
String userObject = pref.getString(key, null);

Upvotes: 2

WenChao
WenChao

Reputation: 3665

In your adapter create constructor with Context like this,

public AdapterList(Context ctx){
    SharedPreferences pref = PreferenceManager
            .getDefaultSharedPreferences(ctx);
    String userObject = pref.getString(key, null);
}

and create it by passing 

    adapter = new YourAdapter(getApplicationContext());

Upvotes: 0

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