兩個ListView實現的Android點餐頁面
阿新 • • 發佈：2019-01-28
package com.example.henry.test; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.widget.AdapterView; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import com.example.henry.test.adapter.CartAdapter; import com.example.henry.test.adapter.GoodsClassifyAdapter; import com.example.henry.test.adapter.GoodsDetailsAdapter; import com.example.henry.test.app.Constant; import com.example.henry.test.entity.GoodsClassify; import com.example.henry.test.entity.GoodsDetails; import com.example.henry.test.function.AppUtility; import com.example.henry.test.function.JsonUtils; import com.lidroid.xutils.HttpUtils; import com.lidroid.xutils.ViewUtils; import com.lidroid.xutils.exception.HttpException; import com.lidroid.xutils.http.RequestParams; import com.lidroid.xutils.http.ResponseInfo; import com.lidroid.xutils.http.callback.RequestCallBack; import com.lidroid.xutils.http.client.HttpRequest; import org.json.JSONException; import org.json.JSONObject; import java.io.Serializable; import java.text.DecimalFormat; import java.util.ArrayList; import java.util.List; public class MainActivity extends Activity implements View.OnClickListener { private ListView mParentList; private ListView mChildList; private TextView mBill; private TextView mPrice; private TextView mCount; private ImageView mCart; private LinearLayout mWindow; private ListView mCartList; private TextView mClear; private View mView; private Boolean isShow = false; private List<GoodsClassify> classifys = new ArrayList<>(); private List<GoodsDetails> detailses = new ArrayList<>(); private List<GoodsDetails> list ;// 購物車中商品列表 private CartAdapter cartAdapter; private GoodsClassifyAdapter classifyAdapter; private GoodsDetailsAdapter detailsAdapter; private static DecimalFormat df = new DecimalFormat("0.00"); private int location = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); ViewUtils.inject(this); setContentView(R.layout.activity_main); init(); getGoodsData(); } /** * 初始化控制元件，並設定監聽事件 */ public void init(){ mParentList = (ListView)findViewById(R.id.parentlist); mChildList = (ListView) findViewById(R.id.childlist); mCount = (TextView) findViewById(R.id.tv_count); mBill = (TextView) findViewById(R.id.billing); mPrice = (TextView) findViewById(R.id.price_main); mCart = (ImageView) findViewById(R.id.cart); mWindow = (LinearLayout) findViewById(R.id.window); mCartList = (ListView) findViewById(R.id.list_cart); mClear = (TextView) findViewById(R.id.clear); mView = (View) findViewById(R.id.view); mBill.setOnClickListener(this); mCart.setOnClickListener(this); mClear.setOnClickListener(this); mView.setOnClickListener(this); } @Override public void onClick(View v) { switch (v.getId()){ case R.id.billing: isShow = setWindowView(true); Intent intent = new Intent(this,BillActivity.class); Bundle bundle = new Bundle(); bundle.putSerializable("LIST", (Serializable) list); intent.putExtras(bundle); startActivity(intent); break; case R.id.cart: isShow = setWindowView(isShow); createCartList(); cartAdapter = new CartAdapter(MainActivity.this,list); mCartList.setAdapter(cartAdapter); break; case R.id.clear: clearList(); break; case R.id.view: isShow = setWindowView(true); break; default: break; } } /* *清空列表 */ public void clearList(){ for (int i=0;i<classifys.size();i++) { for (int j = 0; j < classifys.get(i).getProdList().size(); j++) { classifys.get(i).getProdList().get(j).setProdCount(0); } } createCartList(); cartAdapter = new CartAdapter(MainActivity.this,list); mCartList.setAdapter(cartAdapter); updateList(true,true,false); mPrice.setText("￥" + df.format(0.00) + "元" ); mCount.setVisibility(View.GONE); } /** * 重新整理list， * @param flag 表示adapter，0代表classifyAdapter；1代表detailsAdapter；2代表cartAdapter； */ public void updateList(Boolean... flag){ if (flag[0]) classifyAdapter.notifyDataSetChanged(); if (flag[1]) detailsAdapter.notifyDataSetChanged(); if (flag[2]) cartAdapter.notifyDataSetChanged(); } /** * 修改購物車顯示狀態，並返回修改後的狀態 * @param isShow 購物車詳細資訊是否顯示 * @return 購物車顯示的當前狀態 顯示true，不顯示為false */ public Boolean setWindowView(Boolean isShow){ if (isShow == false){ mView.setVisibility(View.VISIBLE); mWindow.setVisibility(View.VISIBLE); isShow = true; }else { mView.setVisibility(View.GONE); mWindow.setVisibility(View.GONE); updateList(true,true,false); isShow = false; } return isShow; } /** * 初始化列表 */ public void initView(){ if(classifys != null && classifys.size() != 0){ //設定parentList 資料 classifyAdapter = new GoodsClassifyAdapter(getApplicationContext(),classifys); mParentList.setAdapter(classifyAdapter); //設定childList 資料 detailses.addAll(classifys.get(0).getProdList()); detailsAdapter = new GoodsDetailsAdapter(MainActivity.this,detailses,classifyAdapter); mChildList.setAdapter(detailsAdapter); } mParentList.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { location = position; classifyAdapter.clearSelection(position); detailses.clear(); detailses.addAll(classifys.get(position).getProdList()); updateList(false,true,false); } }); } /** * 計算總價與選中的個數,並顯示在介面上 */ public void calculateTotalPrice(){ createCartList(); int num = 0; double price = 0.00; for (int i=0;i<list.size();i++){ num += list.get(i).getProdCount(); price += Double.parseDouble(list.get(i).getProdPrice()) * list.get(i).getProdCount(); } mPrice.setText("￥" + df.format(price) + "元" ); if (num == 0){ this.mCount.setVisibility(View.GONE); }else{ this.mCount.setVisibility(View.VISIBLE); this.mCount.setText(num + ""); } } /** * 建立購物車商品列表 */ public void createCartList(){ list = new ArrayList<>(); for (int i=1;i<classifys.size();i++){ for (int j=0;j<classifys.get(i).getProdList().size();j++){ if (classifys.get(i).getProdList().get(j).getProdCount() > 0){ list.add(classifys.get(i).getProdList().get(j)); } } } } /** * 修改指定id的商品的數量 * @param id * @param num */ public void modifyGoodsNum(String id,int num){ for (int i=0;i<classifys.size();i++){ for (int j=0;j<classifys.get(i).getProdList().size();j++){ if (id.equals(classifys.get(i).getProdList().get(j).getProdId())){ classifys.get(i).getProdList().get(j).setProdCount(num); } } } } /** * 從伺服器獲取商品資料 */ private void getGoodsData() { RequestParams params = new RequestParams(); HttpUtils http = new HttpUtils(); http.send(HttpRequest.HttpMethod.POST, Constant.URL, params, new RequestCallBack<String>() { @Override public void onSuccess(ResponseInfo<String> responseInfo) { try { JSONObject result = new JSONObject(responseInfo.result); if (AppUtility.getStatus(getApplicationContext(), result)) { classifys = JsonUtils.getGoodsList(result); initView(); } else { } } catch (JSONException e) { e.printStackTrace(); } } @Override public void onFailure(HttpException e, String s) { } }); } }
以上是程式碼的主體部分，MainActivity與3個介面卡之間的相互呼叫，從而實現資料的同步。不怎麼會講，光看一個也看不懂，下面我會附上原始碼地址。希望大神門批評指正。