二级列表仿购物车

//主布局

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="match_parent"

    android:orientation="vertical"

    tools:context="com.happy.monigwc.MainActivity">

    <android.support.v7.widget.RecyclerView

        android:id="@+id/rcview"

        android:layout_width="match_parent"

        android:layout_height="0dp"

        android:layout_weight="1"></android.support.v7.widget.RecyclerView>

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="45dp">

        <CheckBox

            android:id="@+id/cb_all"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="center_vertical"

            android:layout_marginLeft="5dp"

            android:text="全选"/>

        <TextView

            android:id="@+id/tv_heji"

            android:layout_width="0dp"

            android:layout_weight="1"

            android:layout_height="wrap_content"

            android:layout_gravity="center_vertical"

            android:layout_margin="5dp"/>

        <Button

            android:id="@+id/btn_buy"

            android:layout_width="wrap_content"

            android:layout_height="45dp"

            android:textColor="#fff"

            android:textStyle="bold"

            android:text="付款(0)"

            android:background="#f00"/>

    </LinearLayout>

</LinearLayout>

   //item布局

<?xml version="1.0" encoding="utf-8"?>

<LinearLayout

    xmlns:android="http://schemas.android.com/apk/res/android"

    xmlns:app="http://schemas.android.com/apk/res-auto"

    xmlns:tools="http://schemas.android.com/tools"

    android:layout_width="match_parent"

    android:layout_height="60dp"

    tools:context="com.happy.monigwc.MainActivity">

    <CheckBox

        android:id="@+id/cb_goods"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center_vertical"

        android:layout_marginLeft="5dp" />

    <ImageView

        android:id="@+id/iv"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center_vertical"

        android:layout_margin="5dp"

        android:background="@mipmap/ic_launcher"/>

    <LinearLayout

        android:layout_width="0dp"

        android:layout_weight="1"

        android:layout_height="match_parent"

        android:orientation="vertical">

        <TextView

            android:id="@+id/tv_name"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_gravity="center_vertical"

            android:layout_margin="5dp"/>

        <TextView

            android:id="@+id/tv_price"

            android:layout_width="wrap_content"

            android:layout_height="wrap_content"

            android:layout_margin="5dp"/>

    </LinearLayout>

</LinearLayout>

//MainActivity

public class MainActivity extends AppCompatActivity {

    private RecyclerView rcview;

    private CheckBox cb_all;

    private TextView tv_heji;

    private Button btn_buy;

    private List<GWCbean> datas;

    private int count=0;

    private int nums=0;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

        rcview = (RecyclerView) findViewById(R.id.rcview);

        cb_all = (CheckBox) findViewById(R.id.cb_all);

        tv_heji = (TextView) findViewById(R.id.tv_heji);

        btn_buy = (Butto
4000
n) findViewById(R.id.btn_buy);

        EventBus.getDefault().register(this);

        //实例化一个集合做为recyclerview的模拟数据

        datas = new ArrayList<>();

        for (int i = 0; i < 20; i++) {

            datas.add(new GWCbean("我是第"+i+"条数据",700+i,false));

        }

        rcview.setLayoutManager(new LinearLayoutManager(this));

        MyAdapter adapter = new MyAdapter(this, datas);

        rcview.setAdapter(adapter);

        cb_all.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                boolean b=cb_all.isChecked();

                for (int i = 0; i < datas.size(); i++) {

                    datas.get(i).setB(b);

                    if(b){

                        count++;

                        nums+=datas.get(i).getPrice();

                    }

                }

                btn_buy.setText("付款("+count+")");

                tv_heji.setText(nums+"元");

                nums=0;

                count=0;

                rcview.setLayoutManager(new LinearLayoutManager(MainActivity.this));

                MyAdapter adapter = new MyAdapter(MainActivity.this, datas);

                rcview.setAdapter(adapter);

            }

        });

    }

    @Subscribe

    public void onEvent(EventBean bean){

        boolean b=bean.is_all();

        datas=bean.getList();

        cb_all.setChecked(b);

        for (int i = 0; i < datas.size(); i++) {

            if(datas.get(i).isB()){

                count++;

                nums+=datas.get(i).getPrice();

            }

        }

        btn_buy.setText("付款("+count+")");

        tv_heji.setText(nums+"元");

        nums=0;

        count=0;

        rcview.setLayoutManager(new LinearLayoutManager(MainActivity.this));

        MyAdapter adapter = new MyAdapter(MainActivity.this, datas);

        rcview.setAdapter(adapter);

    }

    @Override

    protected void onDestroy() {

        super.onDestroy();

        EventBus.getDefault().unregister(this);

    }

//GWBean

public class GWCbean {

    private String name;

    private int price;

    private boolean b;

    public GWCbean(String name, int price, boolean b) {

        this.name = name;

        this.price = price;

        this.b = b;

    }

    @Override

    public String toString() {

        return "GWCbean{" +

                "name='" + name + '\'' +

                ", price=" + price +

                ", b=" + b +

                '}';

    }

    public String getName() {

        return name;

    }

    public void setName(String name) {

        this.name = name;

    }

    public int getPrice() {

        return price;

    }

    public void setPrice(int price) {

        this.price = price;

    }

    public boolean isB() {

        return b;

    }

    public void setB(boolean b) {

        this.b = b;

    }

//EvenBean

public class EventBean {

    private boolean is_all;

    private List<GWCbean> list;

    public EventBean(boolean is_all, List<GWCbean> list) {

        this.is_all = is_all;

        this.list = list;

    }

    @Override

    public String toString() {

        return "EventBean{" +

                "is_all=" + is_all +

                ", list=" + list +

                '}';

    }

    public boolean is_all() {

        return is_all;

    }

    public void setIs_all(boolean is_all) {

        this.is_all = is_all;

    }

    public List<GWCbean> getList() {

        return list;

    }

    public void setList(List<GWCbean> list) {

        this.list = list;

    }