ADD file via upload

ListAdapter.java

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+package com.example.health.foodlist;
+
+import android.content.Context;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.ImageView;
+import android.widget.TextView;
+
+import com.example.health.Bean.FoodBean;
+import com.example.health.R;
+
+import java.util.List;
+
+public class ListAdapter extends BaseAdapter {
+    Context context;
+    List<FoodBean>mDatas;
+
+    public ListAdapter(Context context, List<FoodBean> mDatas) {
+        this.context = context;
+        this.mDatas = mDatas;
+    }
+//决定了ListView展示列表的行数
+    @Override
+    public int getCount() {
+        return mDatas.size();
+    }
+//返回指定位置对应的数据
+    @Override
+    public Object getItem(int position) {
+        return mDatas.get(position);
+    }
+//返回指定位置对应的id
+    @Override
+    public long getItemId(int position) {
+        return position;
+    }
+
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        ViewHolder holder = null;
+        if (convertView == null) {
+            convertView = LayoutInflater.from(context).inflate(R.layout.foodlist,null);//将布局转换成view对象的方法
+            holder = new ViewHolder(convertView);
+            convertView.setTag(holder);
+        }else{
+            holder = (ViewHolder) convertView.getTag();
+        }
+//加载控件显示的内容
+//获取集合指定位置的数据
+        FoodBean foodBean = mDatas.get(position);
+        holder.iv.setImageResource(foodBean.getPicID());
+        holder.fname.setText(foodBean.getFoodName());
+        holder.fcalo.setText(foodBean.getFoodCalorie());//这三步用于显示内容
+        return convertView;
+    }
+
+    class ViewHolder{
+        ImageView iv;
+        TextView fname,fcalo;
+        public ViewHolder(View view){
+            iv = view.findViewById(R.id.item_foodpic);
+            fname = view.findViewById(R.id.item_foodtitle);
+            fcalo = view.findViewById(R.id.item_calorie);
+        }
+    }
+}