1. 程式人生 > 實用技巧 >properties(屬性檔案)

properties(屬性檔案)

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation
="vertical" tools:context=".MainActivity"> <TextView android:layout_width="match_parent" android:layout_height="45dp" android:text="購物商城" android:textSize="18sp" android:textColor="#FFFFFF" android:background="#FF8F03" android:gravity
="center"/> <ListView android:id="@+id/lv" android:layout_width="match_parent" android:layout_height="wrap_content"/> </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="120dp" android:layout_height="90dp" 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="桌子" android:textSize="20sp" android:textColor="#000000"/> <TextView android:id="@+id/tv_price" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="價格" android:textSize="20sp" android:layout_marginTop="10dp" android:layout_below="@+id/title" android:textColor="#FF8F03"/> <TextView android:id="@+id/price" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="1000" android:textSize="20sp" android:layout_below="@+id/title" android:layout_toRightOf="@id/tv_price" android:textColor="#FF8F03" android:layout_marginTop="10dp"/> </RelativeLayout> </RelativeLayout>
package cn.itcast.listview;

import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {
    private ListView mlistview;
    private String[] titles = {"桌子", "蘋果", "蛋糕", "線衣", "獼猴桃", "圍巾"};
    private String[] prices = {"1800元", "10元/kg", "300元", "350元", "10元/kg", "280元"};
    private int[] icons = {R.drawable.table, R.drawable.apple, R.drawable.cake, R.drawable.wireclothes, R.drawable.kiwiftuit, R.drawable.scarf};

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mlistview = (ListView) findViewById(R.id.lv);
        MyBaseAdapter mAdapter = new MyBaseAdapter();
        mlistview.setAdapter(mAdapter);
    }

    class ViewHolder {
        TextView title, price;
        ImageView iv;
    }

    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 = null;
            if (convertView == null) {
                convertView = View.inflate(MainActivity.this, R.layout.list_item, null);
                holder = new ViewHolder();
                holder.title = (TextView) convertView.findViewById(R.id.title);
                holder.price = (TextView) convertView.findViewById(R.id.price);
                holder.iv = (ImageView) 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.setBackgroundResource(icons[position]);
            return convertView;
        }
    }
}