java io file android content context getcachedir 28 29

1public class API extends Application {
2
3    public static final String ServerURL = "http://<Use real server here>:63424";
4    public static final String GET = ServerURL+"/api";
5    public static final String POST = ServerURL+"/api";
6    protected RequestQueue queue;
7
8    private final API mInstance;
9
10    private API() { }
11
12    public API getInstance() {
13        return mInstance;
14    }
15
16    @Override
17    public void onCreate(){
18        super.onCreate();
19        mInstance = this;
20        queue = Volley.newRequestQueue(this);
21    }