GetFormOptionsTask.java

package org.edx.mobile.user;

import android.annotation.TargetApi;
import android.content.Context;
import android.support.annotation.NonNull;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

import org.edx.mobile.task.Task;

import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.List;

public abstract class GetFormOptionsTask extends
        Task<List<FormOption>> {

    @NonNull
    private final String path;

    public GetFormOptionsTask(@NonNull Context context, @NonNull String path) {
        super(context);
        this.path = path;
    }

    // Try-with-resources is actually from API 14, but lint says it isn't: https://code.google.com/p/android/issues/detail?id=73483
    @TargetApi(android.os.Build.VERSION_CODES.KITKAT)
    public List<FormOption> call() throws Exception {
        try (InputStream in = context.getAssets().open("config/" + path + ".json")) {
            return new Gson().fromJson(new InputStreamReader(in), new TypeToken<List<FormOption>>() {
            }.getType());
        }
    }
}