What exactly is Context doing on Android?

Simply put, it's a class about the current state of an app or object. GetApplicationContext(), getContext(), getBaseContext(), or You can get context with this in the activity

Usually when you create a new object, such as View, adapter, or listener,

    TextView tv = new TextView(getContext());
    ListAdapter adapter = new SimpleCursorAdapter(getApplicationContext(), ...);

I write it like this.

When accessing Standard Common Resources such as LAYOUT_INFLATER_SERVICE and Shared Preferences

    context.getSystemService(LAYOUT_INFLATER_SERVICE)   
    getApplicationContext().getSharedPreferences(*name*, *mode*);        

I write it like this.

Also, content providers, broadcasts, intents

    getApplicationContext().getContentResolver().query(uri, ...);

I write it like this