安卓簡易購物商城
阿新 • • 發佈:2020-12-12
<?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="match_parent" android:orientation="vertical"> <TextView android:id="@+id/textView" android:layout_width="match_parent" android:layout_height="40dp" android:textSize="20sp" android:gravity="center" android:textColor="#FFFFFF" android:text="購物商城" android:background="#FFA500"/> <ListView android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/lv" /> </LinearLayout>
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="16dp"> <ImageView android:id="@+id/iv" android:layout_width="100dp" android:layout_height="75dp" android:layout_centerVertical="true" /> <RelativeLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_toRightOf="@id/iv" android:layout_centerVertical="true" > <TextView android:id="@+id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="蘋果" android:textSize="20sp"/> <TextView android:id="@+id/cn_price" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="價格" android:textColor="#FFA500" android:textSize="20sp" android:layout_below="@id/title" android:layout_marginTop="10dp"/> <TextView android:id="@+id/price" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="10元/千克" android:layout_toRightOf="@id/cn_price" android:layout_below="@id/title" android:textSize="20sp" android:textColor="#FFA500" android:layout_marginTop="10dp"/> </RelativeLayout>
package com.example.malllabel; import androidx.appcompat.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.BaseAdapter; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.ListView; import android.widget.TextView; public class MainActivity extends AppCompatActivity { private ListView mListView; private String[] titles={"香蕉","哈密瓜","獼猴挑","西瓜"}; private String[] prices={"15元/kg","30元/kg","35元/kg","10元/kg"}; private int[] icons={R.drawable.banana,R.drawable.hm,R.drawable.kiwifruit,R.drawable.watermelon}; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.mall); mListView =(ListView)findViewById(R.id.lv); MyBaseAdapter adapter =new MyBaseAdapter(); mListView.setAdapter(adapter); } class MyBaseAdapter extends BaseAdapter{ @Override public int getCount(){ return titles.length; } @Override public Object getItem(int position){ return titles[position]; } @Override public long getItemId(int position){ return position; } @Override public View getView(int position, View convertView, ViewGroup parent) { ViewHolder holder; if(convertView==null){ convertView= View.inflate(MainActivity.this,R.layout.listview,null); holder =new ViewHolder(); holder.title = convertView.findViewById(R.id.title); holder.price = convertView.findViewById(R.id.price); holder.iv= convertView.findViewById(R.id.iv); convertView.setTag(holder); }else { holder=(ViewHolder) convertView.getTag(); } holder.title.setText(titles[position]); holder.price.setText(prices[position]); holder.iv.setImageResource(icons[position]); return convertView; } } class ViewHolder{ TextView title; TextView price; ImageView iv; } }