仿京东详情页跳转到购物车

代码名称与建包规范

      

依赖：

compile 'com.jakewharton:butterknife:7.0.1'compile 'com.github.bumptech.glide:glide:3.7.0'compile 'com.google.code.gson:gson:2.8.2'compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.2'compile 'com.squareup.okio:okio:1.5.0'compile 'com.facebook.fresco:fresco:1.5.0'compile 'com.squareup.okhttp3:okhttp:3.9.0'compile 'com.squareup.okhttp3:logging-interceptor:3.4.1'compile 'com.android.support:recyclerview-v7:26.0.0-alpha1'

环境application

applicationId "com.bwie.a1510d_yuekao01"

SplashActivity
public class SplashActivity extends AppCompatActivity {    private ProgressBarView pbv;    private int progress = 120;    private int time = 3;    private Handler handler = new Handler() {        @Override        public void handleMessage(Message msg) {            super.handleMessage(msg);            //动画运行时间为3秒钟，动画结束后跳转到商品详情页面。            time--;            if (time == 0) {                startActivity(new Intent(SplashActivity.this, SecondActivity.class));                finish();            } else {                //设置动画播放进程                progress += 120;                pbv.setProgress(progress);                handler.sendEmptyMessageDelayed(0, 1000);            }        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_splash);        //查找控件        ImageView imageView = (ImageView) findViewById(R.id.logo_img);        pbv = (ProgressBarView) findViewById(R.id.my_progess);        setAnimation(imageView);        handler.sendEmptyMessage(0);        pbv.setProgress(progress);    }    //执行动画的方法    private void setAnimation(ImageView imageView) {        //应用图标从屏幕最上方平移到屏幕中间        ObjectAnimator trans = ObjectAnimator.ofFloat(imageView, "translationY", 0f, 500f).setDuration(1000);        //缩放由2倍到1倍        ObjectAnimator scalX = ObjectAnimator.ofFloat(imageView, "scaleX", 2f, 1f).setDuration(1000);        ObjectAnimator scalY = ObjectAnimator.ofFloat(imageView, "scaleY", 2f, 1f).setDuration(1000);        //渐变从完全透明到完全不透明        ObjectAnimator alpha = ObjectAnimator.ofFloat(imageView, "alpha", 0.0f, 1f).setDuration(1000);        // 旋转为旋转一圈        ObjectAnimator rotate = ObjectAnimator.ofFloat(imageView, "rotation", 0f, 360f).setDuration(1000);        //动画组合开始执行        AnimatorSet setAnimatior = new AnimatorSet();        setAnimatior.play(trans).before(scalX).before(scalY).before(alpha).before(rotate);        setAnimatior.start();    }}

ProgressBarView继承自定义View

public class ProgressBarView extends View {    private Paint paint;    private int currentX = 100;    private int  currentY = 100;    private int count;    private PointF pointF = new PointF(currentX,currentY);    private  int mProgress;    public ProgressBarView(Context context) {        super(context);        initpaint(context);    }    private void initpaint(Context context) {        paint = new Paint();        paint.setAntiAlias(true);        paint.setStyle(Paint.Style.STROKE);    }    public ProgressBarView(Context context, @Nullable AttributeSet attrs) {        super(context, attrs);        initpaint(context);    }    public ProgressBarView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {        super(context, attrs, defStyleAttr);        initpaint(context);    }    @Override    protected void onDraw(Canvas canvas) {        super.onDraw(canvas);        paint.setStrokeWidth(0);        paint.setColor(Color.BLACK);        canvas.drawCircle(pointF.x,pointF.y,20,paint);        canvas.drawCircle(pointF.x,pointF.y,30,paint);        paint.setStrokeWidth(10);        paint.setColor(Color.RED);        RectF recyF = new RectF(75,75,125,125);        canvas.drawArc(recyF,-90,mProgress,false,paint);        paint.setStrokeWidth(1);        paint.setColor(Color.BLUE);        canvas.drawText(count+"",98,102,paint);    }    public void setProgress(int progress){        this.mProgress = progress;        if (mProgress == 120){            count = 2;        }        if (mProgress == 240){            count = 1;        }        if (mProgress == 360){            count = 0;        }        invalidate();    }}

MyApp 继承 Application

public class MyApp extends Application {    @Override    public void onCreate() {        super.onCreate();        Fresco.initialize(this.getApplicationContext());    }}

Api

public interface Api {    public static String ONE = "http://120.27.23.105/product/getProductDetail?pid=71&source=android";    public static String TWO = "https://www.zhaoapi.cn/product/getCarts";}

HttpUtils

public class HttpUtils {    private static volatile HttpUtils httpUtils;    private final OkHttpClient client;    private HttpUtils() {        client = new OkHttpClient.Builder().build();    }    public static HttpUtils getHttpUtils() {        if (httpUtils == null) {            synchronized (HttpUtils.class) {                if (httpUtils == null) {                    httpUtils = new HttpUtils();                }            }        }        return httpUtils;    }    /**     * GET请求     *     * @param url      请求地址     * @param callback 回调     */    public void doGet(String url, Callback callback) {        Request request = new Request.Builder().url(url).build();        client.newCall(request).enqueue(callback);    }    /**     * post请求     *     * @param url      请求地址     * @param params   请求参数     * @param callback 回调     */    public void doPost(String url, Map<String, String> params, Callback callback) {        //这里可以加网络判断        /*//判断参数        if (params == null || params.size() ==0){            //运行时异常            throw new RuntimeException("params is null！！！");        }*/        //创建Request        FormBody.Builder builder = new FormBody.Builder();        for (Map.Entry<String, String> entry : params.entrySet()) {            builder.add(entry.getKey(), entry.getValue());        }        FormBody formBody = builder.build();        Request request = new Request.Builder()                .url(url)                .post(formBody)                .build();        client.newCall(request).enqueue(callback);    }}

public interface OnNetLisenter<T> {    public void onSuccess(T t);    public void onFailure(Exception e);}

SecondModel

public class SecondModel implements ISecondModel {    private Handler handler = new Handler(Looper.getMainLooper());    @Override    public void getDetail(final OnNetLisenter<SecondBean> onNetLisenter) {        HttpUtils.getHttpUtils().doGet(Api.ONE, new Callback() {            @Override            public void onFailure(Call call, final IOException e) {                handler.post(new Runnable() {                    @Override                    public void run() {                        onNetLisenter.onFailure(e);                    }                });            }            @Override            public void onResponse(Call call, Response response) throws IOException {                final String string = response.body().string();                handler.post(new Runnable() {                    @Override                    public void run() {                        SecondBean secondBean = new Gson().fromJson(string, SecondBean.class);                        onNetLisenter.onSuccess(secondBean);                    }                });            }        });    }}

public interface ISecondModel {    public void getDetail(final OnNetLisenter<SecondBean> onNetLisenter);}

P层

public class SecondPresenter {    private ISecondModel iSecondModel;    private IScondActivity iScondActivity;    public SecondPresenter(IScondActivity iScondActivity) {        this.iScondActivity = iScondActivity;        this.iSecondModel = new SecondModel();    }    public void getDetail(){        iSecondModel.getDetail(new OnNetLisenter<SecondBean>() {            @Override            public void onSuccess(SecondBean secondBean) {                if (iScondActivity != null){                    iScondActivity.show(secondBean.getData());                }            }            @Override            public void onFailure(Exception e) {            }        });    }}

public class SecondActivity extends AppCompatActivity implements View.OnClickListener, IScondActivity {    private ImageView mBackImage;    private RelativeLayout mRelative01;    private View mView;    private ImageView mProductImage;    private RelativeLayout mRelative;    private View mView01;    private TextView mTitle;    private TextView mYuanJia;    private TextView mYouHui;    private LinearLayout mLine1;    /**     * 购物车     */    private Button mGoToCart;    /**     * 加入购物车     */    private Button mAddCart;    private LinearLayout mLine2;    private SecondPresenter secondPresenter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_second);        initView();        secondPresenter = new SecondPresenter(this);        secondPresenter.getDetail();    }    private void initView() {        mBackImage = (ImageView) findViewById(R.id.backImage);        mRelative01 = (RelativeLayout) findViewById(R.id.relative01);        mView = (View) findViewById(R.id.view);        mProductImage = (ImageView) findViewById(R.id.ProductImage);        mRelative = (RelativeLayout) findViewById(R.id.relative);        mView01 = (View) findViewById(R.id.view01);        mTitle = (TextView) findViewById(R.id.title);        mYuanJia = (TextView) findViewById(R.id.yuanJia);        mYouHui = (TextView) findViewById(R.id.youHui);        mLine1 = (LinearLayout) findViewById(R.id.line1);        mGoToCart = (Button) findViewById(R.id.goToCart);        mGoToCart.setOnClickListener(this);        mAddCart = (Button) findViewById(R.id.addCart);        mAddCart.setOnClickListener(this);        mLine2 = (LinearLayout) findViewById(R.id.line2);    }    @Override    public void onClick(View v) {        switch (v.getId()) {            default:                break;            case R.id.backImage:                finish();                break;            case R.id.goToCart:                Intent intent1 = new Intent(SecondActivity.this, ThirdActivity.class);                startActivity(intent1);                break;            case R.id.addCart:                //路径                String path = "https://www.zhaoapi.cn/product/addCart?uid=71&pid=1";                OkHttpClient client = new OkHttpClient();                Request request = new Request.Builder()                        .url(path)                        .build();                Call call = client.newCall(request);                call.enqueue(new Callback() {                    @Override                    public void onFailure(Call call, IOException e) {                    }                    @Override                    public void onResponse(Call call, Response response) throws IOException {                        final String body = response.body().string();                        runOnUiThread(new Runnable() {                            @Override                            public void run() {                                //吐司加入购物车成功                                Toast.makeText(SecondActivity.this, "购物车加入商品成功" + body, Toast.LENGTH_SHORT).show();                            }                        });                    }                });                break;        }    }    @Override    public void show(SecondBean.DataBean secondBean) {        String imgs = secondBean.getImages();        String[] split = imgs.split("\\|");        Glide.with(SecondActivity.this).load(split[0]).into(mProductImage);        //设置商品信息显示        mTitle.setText(secondBean.getTitle());        mYuanJia.setText("原价:￥" + secondBean.getPrice());        //设置原价中间横线（删除线）        mYuanJia.getPaint().setFlags(Paint.STRIKE_THRU_TEXT_FLAG);        mYouHui.setText("优惠价:" + secondBean.getBargainPrice());    }

public interface IScondActivity {    public void show(SecondBean.DataBean secondBean);}

XML布局

<RelativeLayout    android:layout_width="match_parent"    android:layout_height="58dp"    android:id="@+id/relative01">    <ImageView        android:padding="5dp"        android:id="@+id/backImage"        android:layout_width="38dp"        android:layout_height="38dp"        android:src="@drawable/leftjiantou"        android:layout_centerVertical="true"        android:layout_alignParentLeft="true"/>    <TextView        android:padding="10dp"        android:text="商品详情"        android:textSize="26sp"        android:layout_width="wrap_content"        android:layout_height="match_parent"        android:layout_centerInParent="true"    /></RelativeLayout><View    android:id="@+id/view"    android:background="#000"    android:layout_height="1dp"    android:visibility="visible"    android:layout_width="match_parent"    android:layout_below="@+id/relative01"></View><RelativeLayout    android:layout_width="match_parent"    android:layout_below="@+id/view"    android:layout_height="288dp"    android:id="@+id/relative">    <ImageView        android:id="@+id/ProductImage"        android:layout_width="match_parent"        android:layout_height="match_parent" /></RelativeLayout><View    android:id="@+id/view01"    android:background="#000"    android:layout_height="1dp"    android:visibility="visible"    android:layout_width="match_parent"    android:layout_below="@+id/relative"></View><LinearLayout    android:id="@+id/line1"    android:orientation="vertical"    android:layout_above="@+id/line2"    android:layout_width="match_parent"    android:layout_below="@+id/relative"    android:layout_height="wrap_content"  >    <TextView        android:textSize="18sp"        android:id="@+id/title"        android:layout_weight="1"        android:layout_height="0dp"        android:layout_marginLeft="18dp"        android:layout_width="wrap_content"    />    <TextView        android:textSize="18sp"        android:id="@+id/yuanJia"        android:layout_weight="1"        android:layout_height="0dp"        android:layout_marginLeft="18dp"        android:layout_width="wrap_content"     />    <TextView        android:textSize="18sp"        android:id="@+id/youHui"        android:layout_weight="1"        android:layout_height="0dp"        android:textColor="#f14d07"        android:layout_marginLeft="18dp"        android:layout_width="wrap_content"    /></LinearLayout><View    android:layout_width="match_parent"    android:layout_above="@+id/line2"    android:visibility="visible"    android:background="#000"    android:layout_height="1dp"></View><LinearLayout    android:id="@+id/line2"    android:orientation="horizontal"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:layout_alignParentBottom="true">    <Button        android:text="购物车"        android:gravity="center"        android:id="@+id/goToCart"        android:layout_weight="1"        android:layout_width="0dp"        android:layout_height="wrap_content"        android:background="@drawable/buttonstyle" ></Button>    <Button        android:gravity="center"        android:text="加入购物车"        android:id="@+id/addCart"        android:layout_weight="1"        android:layout_width="0dp"        android:background="@drawable/buttonstyle"        android:layout_height="wrap_content"></Button></LinearLayout>

ThridModel

public class ThirdModel implements IThirdModel{    private Handler handler = new Handler(Looper.getMainLooper());    @Override    public void getBean(Map<String, String> params, final OnNetLisenter<ThirdBean> onNetLisenter) {        HttpUtils.getHttpUtils().doPost(Api.TWO, params, new Callback() {            @Override            public void onFailure(Call call, final IOException e) {                handler.post(new Runnable() {                    @Override                    public void run() {                        onNetLisenter.onFailure(e);                    }                });            }            @Override            public void onResponse(Call call, Response response) throws IOException {                final String string = response.body().string();                handler.post(new Runnable() {                    @Override                    public void run() {                        ThirdBean thirdBean = new Gson().fromJson(string,ThirdBean.class);                        onNetLisenter.onSuccess(thirdBean);                    }                });            }        });    }}

public interface IThirdModel {    public void getBean(Map<String,String> params,OnNetLisenter<ThirdBean> onNetLisenter);}

p层

public class ThirdPresenter {    private IThirdModel iThirdModel;    private IThirdActivity iThirdActivity;    public ThirdPresenter(IThirdActivity iThirdActivity) {        this.iThirdActivity = iThirdActivity;        iThirdModel = new ThirdModel();    }    public void getBean(String uid) {        Map<String, String> params = new HashMap<>();        params.put("uid", "71");        params.put("source", "android");        iThirdModel.getBean(params, new OnNetLisenter<ThirdBean>() {            @Override            public void onSuccess(ThirdBean thirdBean) {                List<List<ThirdBean.DataBean.ListBean>> child = new ArrayList<>();                for (int i = 0; i < thirdBean.getData().size(); i++) {                    child.add(thirdBean.getData().get(i).getList());                }                if (iThirdActivity != null) {                    iThirdActivity.show(thirdBean.getData(), child);                }            }            @Override            public void onFailure(Exception e) {            }        });    }}

ThridActivity

public class ThirdActivity extends AppCompatActivity implements IThirdActivity{    private ExpandableListView mElv;    /**     * 全选     */    private CheckBox mCb;    /**     * 合计:     */    private TextView mTvTotal;    /**     * 去结算(0)     */    private TextView mTvCount;    private ElvAdapter adapter;    private ThirdPresenter thirdPresenter;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_third);        initView();        thirdPresenter = new ThirdPresenter(this);        thirdPresenter.getBean(getSharedPreferences("user", Context.MODE_PRIVATE).getString("uid", "71"));        //给全选设置点击事件        mCb.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if (adapter != null) {                    adapter.setAllChecked(mCb.isChecked());                }            }        });    }    private void initView() {        mElv = (ExpandableListView) findViewById(R.id.elv);        mElv.setGroupIndicator(null);        mCb = (CheckBox) findViewById(R.id.cb);        mTvTotal = (TextView) findViewById(R.id.tvTotal);        mTvCount = (TextView) findViewById(R.id.tvCount);    }    @Override    public void show(List<ThirdBean.DataBean> group, List<List<ThirdBean.DataBean.ListBean>> child) {        //设置适配器        adapter = new ElvAdapter(this, group, child);        mElv.setAdapter(adapter);        for (int i = 0; i < group.size(); i++) {            mElv.expandGroup(i);        }    }    public void setMoney(double price) {        mTvTotal.setText("合计：" + price);    }    public void setCount(int count) {        mTvCount.setText("去结算(" + count + ")");    }    public void setAllSelect(boolean bool) {        mCb.setChecked(bool);    }}

public interface IThirdActivity {    public void show(List<ThirdBean.DataBean> group, List<List<ThirdBean.DataBean.ListBean>> child);}

购物车适配器

public class ElvAdapter extends BaseExpandableListAdapter {    private Context context;    private List<ThirdBean.DataBean> group;    private List<List<ThirdBean.DataBean.ListBean>> child;    private LayoutInflater inflater;    public ElvAdapter(Context context, List<ThirdBean.DataBean> group, List<List<ThirdBean.DataBean.ListBean>> child) {        this.context = context;        this.group = group;        this.child = child;        inflater = LayoutInflater.from(context);    }    @Override    public int getGroupCount() {        return group.size();    }    @Override    public int getChildrenCount(int groupPosition) {        return child.get(groupPosition).size();    }    @Override    public Object getGroup(int groupPosition) {        return group.get(groupPosition);    }    @Override    public Object getChild(int groupPosition, int childPosition) {        return child.get(groupPosition).get(childPosition);    }    @Override    public long getGroupId(int groupPosition) {        return groupPosition;    }    @Override    public long getChildId(int groupPosition, int childPosition) {        return childPosition;    }    @Override    public boolean hasStableIds() {        return false;    }    @Override    public View getGroupView(final int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {        View view;        final GroupViewHolder holder;        if (convertView == null) {            view = inflater.inflate(R.layout.elv_group, null);            holder = new GroupViewHolder();            holder.tv = view.findViewById(R.id.tvGroup);            holder.cbGroup = view.findViewById(R.id.cbGroup);            view.setTag(holder);        } else {            view = convertView;            holder = (GroupViewHolder) view.getTag();        }        final ThirdBean.DataBean dataBean = group.get(groupPosition);        holder.tv.setText(dataBean.getSellerName());        holder.cbGroup.setChecked(dataBean.isChecked());        holder.cbGroup.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                dataBean.setChecked(holder.cbGroup.isChecked());                //改变子列表中的所有checkbox的状态                setChildsChecked(groupPosition, holder.cbGroup.isChecked());                //改变全选状态                ((ThirdActivity) context).setAllSelect(isGroupCbChecked());                //计算钱和数量                setPriceAndCount();                //刷新列表                notifyDataSetChanged();            }        });        return view;    }    @Override    public View getChildView(final int groupPosition, final int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {        View view;        final ChildViewHolder holder;        if (convertView == null) {            view = inflater.inflate(R.layout.elv_child, null);            holder = new ChildViewHolder();            holder.iv = view.findViewById(R.id.iv);            holder.tvTitle = view.findViewById(R.id.tvTitle);            holder.tvSubhead = view.findViewById(R.id.tvSubhead);            holder.tvPrice = view.findViewById(R.id.tvPrice);            holder.cbChild = view.findViewById(R.id.cbChild);            holder.btDel = view.findViewById(R.id.btDel);            holder.tvNum = view.findViewById(R.id.tvNum);            holder.ivDel = view.findViewById(R.id.ivDel);            holder.ivAdd = view.findViewById(R.id.ivAdd);            view.setTag(holder);        } else {            view = convertView;            holder = (ChildViewHolder) view.getTag();        }        final ThirdBean.DataBean.ListBean listBean = child.get(groupPosition).get(childPosition);        String images = listBean.getImages();        Glide.with(context).load(images.split("\\|")[0]).into(holder.iv);        holder.tvTitle.setText(listBean.getTitle());        holder.cbChild.setChecked(child.get(groupPosition).get(childPosition).isChecked());        holder.tvSubhead.setText(listBean.getSubhead());        holder.tvPrice.setText(listBean.getPrice() + "元");        holder.tvNum.setText(listBean.getCount() + "");        holder.btDel.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                //删除                setPriceAndCount();                child.get(groupPosition).remove(childPosition);                if (child.get(groupPosition).size() == 0) {                    child.remove(groupPosition);                    group.remove(groupPosition);                }                notifyDataSetChanged();            }        });        //给减号设置点击事件        holder.ivDel.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                int c = listBean.getCount();                if (c <= 1) {                    c = 1;                } else {                    c--;                }                setNum(listBean, holder, c);            }        });        //给加号设置点击事件        holder.ivAdd.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                int c = listBean.getCount();                c++;                setNum(listBean, holder, c);            }        });        //给子列表的checkbox设置点击事件        holder.cbChild.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                //点击checkbox的时候，给对应的属性值设置true或者false                listBean.setChecked(holder.cbChild.isChecked());                group.get(groupPosition).setChecked(isChildsCbChecked(groupPosition));                //如果某个一级列表下的二级列表全部选中时，则要判断其它的一级列表是否都选中，去改变“全选”状态                ((ThirdActivity) context).setAllSelect(isGroupCbChecked());                setPriceAndCount();                //刷新页面                notifyDataSetChanged();            }        });        return view;    }    @Override    public boolean isChildSelectable(int groupPosition, int childPosition) {        return true;    }    class GroupViewHolder {        TextView tv;        CheckBox cbGroup;    }    class ChildViewHolder {        ImageView iv;        TextView tvTitle;        TextView tvSubhead;        TextView tvPrice;        CheckBox cbChild;        Button btDel;        TextView tvNum;        ImageView ivDel;        ImageView ivAdd;    }    private void setNum(ThirdBean.DataBean.ListBean listBean, ChildViewHolder holder, int c) {        //改变bean里的那个值        listBean.setCount(c);        holder.tvNum.setText(c + "");        //计算钱和数量，并显示        setPriceAndCount();        //刷新页面        notifyDataSetChanged();    }    /**     * 改变子列表中的所有checkbox的状态     *     * @param groupPosition     * @param bool     */    private void setChildsChecked(int groupPosition, boolean bool) {        List<ThirdBean.DataBean.ListBean> listBeans = child.get(groupPosition);        for (int i = 0; i < listBeans.size(); i++) {            ThirdBean.DataBean.ListBean listBean = listBeans.get(i);            listBean.setChecked(bool);        }    }    /**     * 判断一级列表是否全部选中     *     * @return     */    private boolean isGroupCbChecked() {        if (group.size() == 0) {            return false;        }        for (int i = 0; i < group.size(); i++) {            ThirdBean.DataBean dataBean = group.get(i);            if (!dataBean.isChecked()) {                return false;            }        }        return true;    }    /**     * 判断同一商家下的子列表checkbox是否都选中     *     * @param groupPosition     * @return     */    private boolean isChildsCbChecked(int groupPosition) {        List<ThirdBean.DataBean.ListBean> listBeans = child.get(groupPosition);        for (int i = 0; i < listBeans.size(); i++) {            ThirdBean.DataBean.ListBean listBean = listBeans.get(i);            if (!listBean.isChecked()) {                return false;            }        }        return true;    }    /**     * 设置钱和数量     */    private void setPriceAndCount() {        PriceAndCount priceAndCount = computePrice();        ((ThirdActivity) context).setMoney(priceAndCount.getPrice());        ((ThirdActivity) context).setCount(priceAndCount.getCount());    }    /**     * 计算钱     */    private PriceAndCount computePrice() {        double sum = 0;        int count = 0;        for (int i = 0; i < child.size(); i++) {            List<ThirdBean.DataBean.ListBean> listBeans = child.get(i);            for (int j = 0; j < listBeans.size(); j++) {                ThirdBean.DataBean.ListBean listBean = listBeans.get(j);                //表示是否选中                if (listBean.isChecked()) {                    count += listBean.getCount();                    sum += listBean.getPrice() * listBean.getCount();                }            }        }        return new PriceAndCount(sum, count);    }    /**     * “全选”改变状态     *     * @param bool     */    public void setAllChecked(boolean bool) {        for (int i = 0; i < group.size(); i++) {            ThirdBean.DataBean dataBean = group.get(i);            dataBean.setChecked(bool);            setChildsChecked(i, bool);        }        setPriceAndCount();        //刷新页面        notifyDataSetChanged();    }}

PriceAndCount

public class PriceAndCount {    private double price;    private int count;    public PriceAndCount(double price, int count) {        this.price = price;        this.count = count;    }    public double getPrice() {        return price;    }    public void setPrice(double price) {        this.price = price;    }    public int getCount() {        return count;    }    public void setCount(int count) {        this.count = count;    }}

xml布局

<ImageView    android:id="@+id/logo_img"    android:layout_width="100dp"    android:layout_height="100dp"    android:src="@mipmap/ic_launcher"    android:layout_centerHorizontal="true" /><com.bwie.a1510d_yuekao01.ProgressBarView    android:visibility="gone"    android:id="@+id/my_progess"    android:layout_centerVertical="true"    android:layout_width="wrap_content"    android:layout_height="wrap_content" />

<TextView    android:layout_width="match_parent"    android:layout_height="40dp"    android:background="#ff3660"    android:gravity="center"    android:text="购物车"    android:textSize="30sp" /><ExpandableListView    android:id="@+id/elv"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:layout_weight="1" /><RelativeLayout    android:layout_width="match_parent"    android:layout_height="40dp">    <CheckBox        android:id="@+id/cb"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerVertical="true"        android:text="全选" />    <TextView        android:id="@+id/tvTotal"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_centerVertical="true"        android:layout_marginLeft="15dp"        android:layout_toRightOf="@id/cb"        android:text="合计:" />    <TextView        android:id="@+id/tvCount"        android:layout_width="100dp"        android:layout_height="match_parent"        android:layout_alignParentRight="true"        android:layout_centerVertical="true"        android:background="#ff0000"        android:gravity="center"        android:text="去结算(0)"        android:textColor="#ffffff" /></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="120dp"    android:descendantFocusability="blocksDescendants"    android:gravity="center_vertical"    android:orientation="horizontal"    android:paddingLeft="50dp">    <CheckBox        android:id="@+id/cbChild"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <ImageView        android:id="@+id/iv"        android:layout_width="100dp"        android:layout_height="100dp" />    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_weight="1"        android:orientation="vertical">        <TextView            android:id="@+id/tvTitle"            android:layout_width="wrap_content"            android:layout_height="wrap_content" />        <TextView            android:id="@+id/tvSubhead"            android:layout_width="wrap_content"            android:layout_height="wrap_content" />        <TextView            android:id="@+id/tvSubhead"            android:layout_width="wrap_content"            android:layout_height="wrap_content" />        <LinearLayout            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:gravity="center_vertical"            android:orientation="horizontal">            <TextView                android:id="@+id/tvPrice"                android:layout_width="wrap_content"                android:layout_height="wrap_content" />            <ImageView                android:layout_marginLeft="10dp"                android:id="@+id/ivDel"                android:layout_width="25dp"                android:layout_height="25dp"                android:background="@drawable/iv_del" />            <TextView                android:id="@+id/tvNum"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:textSize="25sp"                android:layout_marginLeft="3dp"                android:layout_marginRight="3dp"                android:text="1"/>            <ImageView                android:id="@+id/ivAdd"                android:layout_width="25dp"                android:layout_height="25dp"                android:background="@drawable/iv_add" />        </LinearLayout>    </LinearLayout>    <Button        android:id="@+id/btDel"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="删除" /></LinearLayout>

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:gravity="center_vertical"    android:orientation="horizontal">    <CheckBox        android:id="@+id/cbGroup"        android:layout_width="wrap_content"        android:layout_height="wrap_content" />    <TextView        android:id="@+id/tvGroup"        android:layout_width="match_parent"        android:layout_height="40dp"        android:gravity="center_vertical" /></LinearLayout>