From 291fc104cad3d5d29847ee049853b82b3d6391d4 Mon Sep 17 00:00:00 2001
From: pa3fjc76b <2505730605@qq.com>
Date: Fri, 8 Oct 2021 00:57:05 +0800
Subject: [PATCH] ADD file via upload

---
 ListActivity.java | 103 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 ListActivity.java

diff --git a/ListActivity.java b/ListActivity.java
new file mode 100644
index 0000000..f259bd6
--- /dev/null
+++ b/ListActivity.java
@@ -0,0 +1,103 @@
+package com.example.health.foodlist;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.text.TextUtils;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.EditText;
+import android.widget.ImageView;
+import android.widget.ListView;
+import android.widget.Toast;
+
+import com.example.health.Bean.FoodBean;
+import com.example.health.Bean.Foodinfo;
+import com.example.health.R;
+import com.example.health.food_grid.FoodDescActivity;
+import com.example.health.food_grid.FoodGridActivity;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class ListActivity extends AppCompatActivity implements View.OnClickListener {
+    EditText list_edit;
+    ImageView list_refresh,list_serach;
+    ListView list_foodlist;
+//Listview的内部数据源
+    List<FoodBean> mDatas;
+    List<FoodBean> allFoodList;
+    private ListAdapter adapter;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_list);
+//查找控件
+        intiView();
+//找到Listview对应的数据源
+        mDatas = new ArrayList<>();
+        allFoodList = Foodinfo.getAllFoodList();
+        mDatas.addAll(allFoodList);
+//创建适配器  BaseAdapter的子类
+        adapter = new ListAdapter(this, mDatas);
+        list_foodlist.setAdapter(adapter);//设置适配器
+//设置单向点击监听功能
+        setListener();
+    }
+
+    private void setListener() {
+        list_foodlist.setOnItemClickListener(new AdapterView.OnItemClickListener() {
+            @Override
+            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
+                FoodBean foodBean = mDatas.get(position);
+                Intent intent = new Intent(ListActivity.this, FoodDescActivity.class);
+                intent.putExtra("food",foodBean);
+                startActivity(intent);
+            }
+        });
+    }
+
+
+    private void intiView() {
+        list_edit=findViewById(R.id.info_edit);
+        list_refresh=findViewById(R.id.info_refresh);
+        list_serach=findViewById(R.id.info_search);
+        list_foodlist=findViewById(R.id.info_foodlistview);
+        list_refresh.setOnClickListener(this);//添加点击事件的监听器
+        list_serach.setOnClickListener(this);
+    }
+
+    @Override
+    public void onClick(View v) {
+        switch (v.getId()) {
+            case R.id.info_refresh://刷新点击
+                list_edit.setText("");
+                mDatas.clear();
+                mDatas.addAll(allFoodList);
+                adapter.notifyDataSetChanged();
+                break;
+
+            case R.id.info_search://搜索点击
+//               获取输入内容，判断不为空
+                String input = list_edit.getText().toString().trim();
+                if (TextUtils.isEmpty(input)) {
+                    Toast.makeText(this, "输入内容不能为空!", Toast.LENGTH_SHORT).show();
+                    return;
+                }
+//                判断所有食物列表的标题是否包含输入内容，如果包含，就添加到小集合中
+                List<FoodBean>list = new ArrayList<>();
+                for (int i = 0; i < allFoodList.size(); i++) {
+                    String foodName = allFoodList.get(i).getFoodName();
+                    if (foodName.contains(input)) {
+                      list.add(allFoodList.get(i));
+                    }
+                    mDatas.clear();//清空Listview的适配器的内容
+                    mDatas.addAll(list);//添加新的数据到数据源中
+                    adapter.notifyDataSetChanged();//提升适配器更新
+                }
+                break;
+        }
+    }
+}