Listview simply implements shopping cart function

public class MyView extends LinearLayout implements  {
 
  private OnAmountChangeListener mListener;
  private int count;
  private TextView numText;
 
  public MyView(Context context) {
    this(context,null);
  }
 
  public MyView(Context context, @Nullable AttributeSet attrs) {
    this(context, attrs,0);
  }
 
  public MyView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
 
    View view = (context, , this);
    initView(view);
 
 
  }
  public void setText(int num){
    (""+num);
  }
  public int getText(){
    getTextString();
    return count;
  }
 
  private void initView(View view) {
 
    Button addBtn = (.btn_add);
    Button jianBtn = (.btn_jian);
    numText = (.txt_num);
    getTextString();
    (this);
    (this);
  }
 
  public void setOnclickNum(OnAmountChangeListener mListener){
     = mListener;
  }
  @Override
  public void onClick(View view) {
    getTextString();
    switch (()){
      case .btn_add:
        count++;
        break;
      case .btn_jian:
        if(count>0){
          count--;
        }
        break;
    }
    (""+count);
    if(mListener!=null) {
      (view, count);
    }
  }
 
  public void getTextString() {
    String numStr = ().toString().trim();
    count = (numStr);
  }
  public interface OnAmountChangeListener {
    void onAmountChange(View view, int amount);
  }
}

public class MyAdapter extends BaseAdapter {
  private List<Text> mList;
  private Context context ;
  private GaroupClick garoupClick;
  private int index;
  private CountClick countClick;
 
  public MyAdapter(Context context) {
     = context;
  }
 
  @Override
  public int getCount() {
    return ();
  }
  public void setData(List<Text> mList){
     = mList;
    notifyDataSetChanged();
  }
  @Override
  public Object getItem(int i) {
    return (i);
  }
 
  @Override
  public long getItemId(int i) {
    return i;
  }
 
  public void setOnCountClick(CountClick click){
     = click;
  }
  public void setOnGroupclick(GaroupClick groupclick){
     = groupclick;
  }
  @Override
  public View getView(final int i, View view, ViewGroup viewGroup) {
    final ViewHolder holder ;
    if(view==null){
      holder = new ViewHolder();
      view = (context, , null);
       = (.cb_chid_checked);
       = (.txt_price);
       = ();
      (holder);
    }else{
      holder = (ViewHolder)();
    }
    final Text text = mList. get(i);
 
    (());
    (""+());
    (());
    (new () {
      @Override
      public void onAmountChange(View view, int amount) {
        (amount);
      }
    });
    boolean checked = ();
    if(checked){
      (new () {
        @Override
        public void onAmountChange(View view, int amount) {
          if(countClick!=null){
            (i,amount);
          }
        }
      });
    }
 
    (new () {
      @Override
      public void onClick(View view) {
        (((CheckBox)view).isChecked());
 
        if(garoupClick!=null){
          (i,((CheckBox)view).isChecked());
        }
 
 
      }
    });
    return view;
  }
  class ViewHolder{
    CheckBox childCheck;
    TextView txtPrice;
    MyView myView;
  }
  public interface GaroupClick{
    void onItemClick(int position, boolean isChoose);
  }
  public interface CountClick{
    void onNumClick(int position, int count);
  }
 
 
}

public class MainActivity extends AppCompatActivity implements ,  {
 
  private Button jiesuanBtn;
  private ListView mListView;
  private CheckBox allCheck;
  private TextView priceText;
  private List<Text> mList = new ArrayList<>();
  private int numPrice = 0;
  private int count = 0;
  private MyAdapter adapter;
 
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    (savedInstanceState);
    setContentView(.activity_main);
    initView();
    initData();
 
 
  }
 
  private void initData() {
    for (int i = 0; i < 30; i++) {
      Text txt = new Text();
      (20);
      (1);
      (txt);
    }
 
    adapter = new MyAdapter(this);
    (mList);
    (adapter);
    (this);
    (this);
  }
 
  public boolean isAllChecked(){
    for (Text text : mList) {
      if(!()){//Transfer the collection, there is a return false that does not select return        return false;
      }
    }
    return true;
  }
  private void initView() {
    jiesuanBtn = (Button) findViewById(.btn_num);
    mListView = (ListView) findViewById();
    allCheck = (CheckBox) findViewById(.cb_all_checked);
    priceText = (TextView) findViewById(.txt_price_sum);
    (new () {
      @Override
      public void onClick(View view) {
        if(()!=0) {
          if(()) {
            for (int i = 0; i < (); i++) {
              (i).setChoose(true);
              ();
            }
          }else{
            for (int i = 0; i < (); i++) {
              (i).setChoose(false);
              ();
            }
          }
          upDate();
        }
      }
 
    });
 
    (new () {
      @Override
      public void onClick(View view) {
        Intent intent = new Intent(, );
        startActivity(intent);
      }
    });
  }
 
  private void upDate() {
    numPrice = 0;
    count = 0;
    for (int i = 0; i < (); i++) {
      Text text = (i);
      if(()){
        count++;
        numPrice += ()*();
      }
    }
    ("Checkout("+count+"）");
    ("total:"+numPrice);
  }
 
 
  @Override
  public void onItemClick(int position, boolean isChoose) {
    (position).setChoose(isChoose);
    if(isAllChecked()){
      (true);
    }else{
      (false);
    }
    ();
    upDate();
  }
 
  @Override
  public void onNumClick(int position, int count) {
    (position).setCount(count);
    ();
    upDate();
  }
}