android简单购物车,自定义view加减按钮
依赖
implementation 'com.google.code.gson:gson:2.8.5'
implementation 'com.github.bumptech.glide:glide:4.8.0'
implementation 'com.android.support:recyclerview-v7:28.0.0'
implementation('com.jcodecraeer:xrecyclerview:1.5.9') {
exclude group: 'com.android.support'
}
implementation 'com.squareup.okhttp3:okhttp:3.12.0'
mainActivity的xml布局
MainActivity
public class MainActivity extends AppCompatActivity implements CallBacks>,CartAdapter2.TotalPriceListener{
private TextView mSumPrice;
private CheckBox mCheckAll;
private CartAdapter2 mCartAdapter;
private ExpandableListView mGoodsList;
private CartPresenter cartPresenter = new CartPresenter(this);
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mSumPrice=findViewById(R.id.goods_sum_price);
mCheckAll = findViewById(R.id.check_all);
mCheckAll.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
mCartAdapter.checkAll(isChecked);
}
});
mGoodsList =findViewById(R.id.list_cart);
mCartAdapter = new CartAdapter2();
mGoodsList.setAdapter(mCartAdapter);
mCartAdapter.setTotalPriceListener(this);//设置总价回调器
mGoodsList.setGroupIndicator(null);
mGoodsList.setOnChildClickListener(new ExpandableListView.OnChildClickListener() {
@Override
public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {
return true;
}
});
cartPresenter.requestData();
}
@Override
public void success(List data) {
mCartAdapter.addAll(data);
//遍历所有group,将所有项设置成默认展开
int groupCount=data.size();
for (int i = 0; i 自定义view加减java按钮
public class AddSubLayout extends LinearLayout implements View.OnClickListener {
private TextView mAddBtn,mSubBtn;
private TextView mNumText;
private AddSubListener addSubListener;
public AddSubLayout(Context context) {
super(context);
initView();
}
public AddSubLayout(Context context, AttributeSet attrs) {
super(context, attrs);
initView();
}
public AddSubLayout(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initView();
}
private void initView() {
//加载layout布局，第三个参数ViewGroup一定写成this
View view = View.inflate(getContext(),R.layout.add_btn_item,this);
mAddBtn = view.findViewById(R.id.btn_add);
mSubBtn = view.findViewById(R.id.btn_sub);
mNumText = view.findViewById(R.id.text_number);
mAddBtn.setOnClickListener(this);
mSubBtn.setOnClickListener(this);
}
@Override
protected void onLayout(boolean changed, int l, int t, int r, int b) {
super.onLayout(changed, l, t, r, b);
int width = r-l;//getWidth();
int height = b-t;//getHeight();
}
@Override
public void onClick(View v) {
int number = Integer.parseInt(mNumText.getText().toString());
switch (v.getId()){
case R.id.btn_add:
number++;
mNumText.setText(number+"");
break;
case R.id.btn_sub:
if (number==0){
Toast.makeText(getContext(),"数量不能小于0",Toast.LENGTH_LONG).show();
return;
}
number--;
mNumText.setText(number+"");
break;
}
if (addSubListener!=null){
addSubListener.addSub(number);
}
}
public void setCount(int count) {
mNumText.setText(count+"");
}
public void setAddSubListener(AddSubListener addSubListener) {
this.addSubListener = addSubListener;
}
public interface AddSubListener{
void addSub(int count);
}
}
自定义view的xml布局
二级列表的子view
二级列表的父级的view
两个二级列表的adapter
public class CartAdapter2 extends BaseExpandableListAdapter {
private List mList = new ArrayList<>();
private TotalPriceListener totalPriceListener;
public CartAdapter2(){
}
public void setTotalPriceListener(TotalPriceListener totalPriceListener) {
this.totalPriceListener = totalPriceListener;
}
@Override
public int getGroupCount() {
return mList.size();
}
@Override
public int getChildrenCount(int groupPosition) {
return mList.get(groupPosition).getList().size();
}
@Override
public Object getGroup(int groupPosition) {
return mList.get(groupPosition);
}
@Override
public Object getChild(int groupPosition, int childPosition) {
return mList.get(groupPosition).getList().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) {
GroupHodler holder;
if (convertView==null){
convertView=View.inflate(parent.getContext(), R.layout.layout_father,null);
holder=new GroupHodler();
holder.checkBox=convertView.findViewById(R.id.checkBox);
convertView.setTag(holder);
}else {
holder= (GroupHodler) convertView.getTag();
}
final Shop shop=mList.get(groupPosition);
holder.checkBox.setText(shop.getSellerName());
holder.checkBox.setChecked(shop.isCheck());
holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
shop.setCheck(isChecked);
List goodsList=mList.get(groupPosition).getList();
for (int i=0;i data) {
if (data != null)
mList.addAll(data);
}
class MyHolder {
CheckBox check;
TextView text;
TextView price;
ImageView image;
AddSubLayout addSub;
}
class GroupHodler {
CheckBox checkBox;
}
public interface TotalPriceListener{
void totalPrice(double totalPrice);
}
}
全局类
public class DTApplication extends Application {
private static DTApplication instance;
private SharedPreferences mSharedPreferences;
@Override
public void onCreate() {
super.onCreate();
instance = this;
mSharedPreferences = getSharedPreferences("application",
Context.MODE_PRIVATE);
// JPushInterface.setDebugMode(true);
// JPushInterface.init(this); // 初始化 JPush
}
public static DTApplication getInstance() {
return instance;
}
public SharedPreferences getShare() {
return mSharedPreferences;
}
}
Callback正确失败类
public interface CallBacks {
void success(T data);
void fail(Result result);
}
Result
int code;
String msg;
T data;
Shop类
List list;
String sellerName;
String sellerid;
int textColor = 0xffffffff;
int background ;
boolean check;
Goods类
private double bargainPrice;
private String createtime;
private String detailUrl;
private String images;
private int num;
private int pid;
private double price;
private int pscid;
private int selected;
private int sellerid;
private String subhead;
private String title;
private int count=1;
CartPrecenter
public class CartPresenter {
CallBacks callBacks;
public CartPresenter(CallBacks callBacks) {
this.callBacks=callBacks;
}
Handler handler=new Handler(Looper.getMainLooper()){
@Override
public void handleMessage(Message msg) {
super.handleMessage(msg);
Result result = (Result) msg.obj;
if (result.getCode()==0){
callBacks.success(result.getData());
}else{
callBacks.fail(result);
}
}
};
public void requestData(){
new Thread(new Runnable() {
@Override
public void run() {
Result result=CartModel.add();
Message message = handler.obtainMessage();
message.obj =result;
handler.sendMessage(message);
}
}).start();
}
}
model
public class CartModel {
public static Result add() {
String s=ListUtils.add("http://www.zhaoapi.cn/product/getCarts?uid=71");
Gson gson=new Gson();
Type type=new TypeToken>>(){}.getType();
Result result=gson.fromJson(s,type);
return result;
}
}
Utis获取网络工具类
public class ListUtils {
public static String add(String urls) {
OkHttpClient okHttpClient=new OkHttpClient();
Request request=new Request.Builder().url(urls).build();
Call call=okHttpClient.newCall(request);
try {
Response execute = call.execute();
return execute.body().string();
} catch (IOException e) {
e.printStackTrace();
}
return "";
}
}