Inject database in a ContentProvider with dagger

Question

I want to inject a singleton SqliteOpenHelper in a ContentProvider. However, it seems that the ContentProvider instance is being built bef

Answer 1

Simple Solution

There is a simple reason for this, onCreate() provider is called before the appropriate method in the Application. You can make the creation of a component in another method of the Application, for example attachBaseContext.

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1 Move your logic from onCreate to attachBaseContext in your Application.

@Override
public void attachBaseContext(Context base){

    super.attachBaseContext(base);

    mApplicationComponent = DaggerApplicationComponent.builder()
            .applicationModule(new ApplicationModule(this))
            .build();
    mApplicationComponent.inject(this);
}

2 You can now inject in OnCreate in your ContentProvider:

public boolean onCreate() {

    YourMainApplication.get(getContext()).getComponent().inject(this);

    return true;
}

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Disclaimer: Full Credits to @LeEnot from this russian blog: Dagger2 Inject in Content Provider. The answer is listed here for convenience as it is not available in English.