mContext為空？

另一個(gè)類的參數(shù)為空，導(dǎo)致點(diǎn)擊事件沒響應(yīng)

public class CartProvider {

public static final String JSON_CART = "json_cart";
private Context mContext;

//優(yōu)化過的HashMap集合
private  SparseArray<GoodsBean> datas;

private static CartProvider cartProvider;

private  CartProvider(Context mContext) {
    this.mContext = mContext;
    datas = new SparseArray<>(100);
    listToSparse();
}
    public static CartProvider getInstance() {
    if (cartProvider == null) {
        cartProvider = new CartProvider(MyApplication.getContext());
    }
    return cartProvider;
}