MainActivity

import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.content.Intent;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.CheckBox;import android.widget.ExpandableListView;import android.widget.TextView;import org.greenrobot.eventbus.EventBus;import org.greenrobot.eventbus.Subscribe;import java.util.ArrayList;import java.util.List;public class MainActivity extends AppCompatActivity  implements IMainActivity{    private ExpandableListView mElv;    private CheckBox mCheckbox2;    /**     * 0     */    private TextView mTvPrice;    /**     * 结算(0)     */    private TextView mTvNum;    private MyAdapter adapter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        EventBus.getDefault().register(this);        initView();        new MainPresenter(this).getGoods();        mCheckbox2.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                adapter.changeAllListCbState(mCheckbox2.isChecked());            }        });    }    @Override    protected void onDestroy() {        super.onDestroy();        EventBus.getDefault().unregister(this);    }    private void initView() {        mElv = (ExpandableListView) findViewById(R.id.elv);        mCheckbox2 = (CheckBox) findViewById(R.id.checkbox2);        mTvPrice = (TextView) findViewById(R.id.tv_price);        mTvNum = (TextView) findViewById(R.id.tv_num);    }    @Override    public void showList(List<GoosBean.DataBean> groupList, List<List<GoosBean.DataBean.DatasBean>> childList) {        adapter = new MyAdapter(this, groupList, childList);        mElv.setAdapter(adapter);        mElv.setGroupIndicator(null);        //默认让其全部展开        for (int i = 0; i < groupList.size(); i++) {            mElv.expandGroup(i);        }    }    @Subscribe    public void onMessageEvent(MessageEvent event) {        mCheckbox2.setChecked(event.isChecked());    }    @Subscribe    public void onMessageEvent(PriceAndCountEvent event) {        mTvNum.setText("结算(" + event.getCount() + ")");        mTvPrice.setText(event.getPrice() + "");    }

}