购物车详情

public class CartActivity extends AppCompatActivity implements IMainActivity, View.OnClickListener{

    private CartExpanableListview expanableListview;
    private CartPresenter cartPresenter;
    private CheckBox check_all;
    private TextView text_total;
    private TextView text_buy;
    private CartBean cartBean;
    private RelativeLayout relative_progress;
    private MyAdapter myAdapter;


    private LinearLayout linear_bottom;

    private Handler handler = new Handler(){
        @Override
        public void handleMessage(Message msg) {
            if (msg.what == 0){
                CountPriceBean countPriceBean = (CountPriceBean) msg.obj;
                text_total.setText("合计:¥"+countPriceBean.getPriceString());
                text_buy.setText("去结算("+countPriceBean.getCount()+")");
            }
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.cart_activity_layout);

        check_all = findViewById(R.id.check_all);
        text_total = findViewById(R.id.text_total);
        text_buy = findViewById(R.id.text_buy);
        expanableListview = findViewById(R.id.expanable_listview);
        relative_progress = findViewById(R.id.relative_progress);
        linear_bottom = findViewById(R.id.linear_layout);

        //去掉默认的指示器
        expanableListview.setGroupIndicator(null);

        cartPresenter = new CartPresenter(this);

        //1.点击全选:选中/未选中...调用适配器中的方法...myAdapter.setIsCheckAll(true);来设置所有的一级和二级是否选中,计算
        check_all.setOnClickListener(this);
        text_buy.setOnClickListener(this);

    }

    @Override
    protected void onResume() {
        super.onResume();

        relative_progress.setVisibility(View.VISIBLE);
        //请求数据
        cartPresenter.getCartData(ApiUtil.cartUrl);

    }



    @Override
    public void getSuccessCartData(CartBean cartBean) {

        relative_progress.setVisibility(View.GONE);
        this.cartBean = cartBean;

        if (cartBean != null){
            //显示下面的
            linear_bottom.setVisibility(View.VISIBLE);

            //1.根据组中子条目是否选中,,,决定该组是否选中...初始化一下每一组中isGroupCheck这个数据
            for (int i = 0;i<cartBean.getData().size();i++){
                if (isAllChildInGroupSelected(i)){
                    //更改i位置 组的选中状态
                    cartBean.getData().get(i).setGroupChecked(true);
                }
            }

            //2.根据每一个组是否选中的状态,,,初始化全选是否选中
            check_all.setChecked(isAllGroupChecked());

            //设置适配器
            myAdapter = new MyAdapter(CartActivity.this, cartBean,handler,cartPresenter,relative_progress);
            expanableListview.setAdapter(myAdapter);



            //展开
            for (int i= 0;i<cartBean.getData().size();i++){
                expanableListview.expandGroup(i);
            }

            //3.根据子条目是否选中  初始化价格和数量
            myAdapter.sendPriceAndCount();

        }else {
            //隐藏下面的全选.... 等
            linear_bottom.setVisibility(View.GONE);
            //显示去逛逛,,,添加购物车
            Toast.makeText(CartActivity.this,"购物车为空,去逛逛",Toast.LENGTH_SHORT).show();

        }


    }

    /**
     * 所有的一级列表是否选中
     */
    private boolean isAllGroupChecked() {
        for (int i =0;i<cartBean.getData().size();i++){
            if (! cartBean.getData().get(i).isGroupChecked()){//代表一级列表有没选中的
                return false;
            }
        }

        return true;
    }

    /**
     * 判断当前组里面所有的子条目是否选中
     * @param groupPosition
     * @return
     */
    private boolean isAllChildInGroupSelected(int groupPosition) {
        for (int i= 0;i<cartBean.getData().get(groupPosition).getList().size();i++){
            //只要有一个没选中就返回false
            if (cartBean.getData().get(groupPosition).getList().get(i).getSelected() ==0){
                return false;
            }
        }

        return true;
    }




    @Override
    public void onClick(View view) {
        switch (view.getId()){
            case R.id.check_all:
                myAdapter.setAllChildState(check_all.isChecked());

                break;
            case R.id.text_buy://去结算...试一下创建订单


                break;
        }
    }
}