import android.support.v7.widget.ThemedSpinnerAdapter; //导入依赖的package包/类
public DropdownAdapter(Activity activity) {
    // store activity
    mActivity = activity;

    // fill list with track bundles
    initializeTrackBundleList();

    // create an adapter helper
    mDropdownAdapterHelper = new ThemedSpinnerAdapter.Helper(activity);
}
 

import android.support.v7.widget.ThemedSpinnerAdapter; //导入依赖的package包/类
public MyAdapter(Context context, String[] objects) {
    super(context, android.R.layout.simple_list_item_1, objects);
    mDropDownHelper = new ThemedSpinnerAdapter.Helper(context);
}
 

import android.support.v7.widget.ThemedSpinnerAdapter; //导入依赖的package包/类
public MyAdapter(Context context, ArrayList<String> objects) {
    super(context, android.R.layout.simple_list_item_1, objects);
    mDropDownHelper = new ThemedSpinnerAdapter.Helper(context);
}
 

import android.support.v7.widget.ThemedSpinnerAdapter; //导入依赖的package包/类
public ArrayAdapterCompat(Context context, @LayoutRes int resource, List<T> objects) {
    super(context, resource, objects);
    mDropDownResource = resource;

    mDropDownHelper = new ThemedSpinnerAdapter.Helper(context);
}
 

import android.support.v7.widget.ThemedSpinnerAdapter; //导入依赖的package包/类
public SectionsPagerAdapter(Context context, String[] objects) {
    super(context, android.R.layout.simple_list_item_1, objects);
    mDropDownHelper = new ThemedSpinnerAdapter.Helper(context);
}
 

import android.support.v7.widget.ThemedSpinnerAdapter; //导入依赖的package包/类
public ToolbarSpinnerAdapter(Context context) {
    super(context, 0, context.getResources().getStringArray(R.array.sort_types));
    dropDownHelper = new ThemedSpinnerAdapter.Helper(context);
}