Android 横向列表GridView 实现横向滚动

Android 横向列表实现，可左右滑动，如下图

1.主界面布局代码：activity_main.xml

a.包裹HorizontalScrollView控件是GirdView横向滚动的基本条件
b.GirdView外包裹LinearLayout是java代码中参数设置的必要条件

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<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
    <HorizontalScrollView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_margin="5dp" >
        <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="fill_parent"
            android:layout_margin="10dp" >
            <GridView
                android:id="@+id/grid"
                android:layout_width="fill_parent"
                android:layout_height="fill_parent"
                android:gravity="center"
                android:numColumns="auto_fit"
                android:stretchMode="spacingWidthUniform" >
            </GridView>
        </LinearLayout>
    </HorizontalScrollView>
</LinearLayout>

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2.主界面GridView列表子项布局文件：list_item.xml

<!—?xml version=
“1.0”
encoding=
“utf-8”
?—>

<linearlayout xmlns:android=
“http://schemas.android.com/apk/res/android“
android:id=
“@+id/itemlayout”
android:layout_width=
“wrap_content”
android:layout_height=
“wrap_content”
android:orientation=
“vertical”
>

<imageview android:id=
“@+id/ItemImage”
android:layout_width=
“80.0dip”
android:layout_height=
“80.0dip”
android:layout_gravity=
“center_horizontal”
android:src=
“@drawable/china”
>

</imageview>

<textview android:id=
“@+id/tvCity”
android:layout_width=
“wrap_content”
android:layout_height=
“wrap_content”
android:layout_gravity=
“center_horizontal”
android:text=
“Title”
android:textcolor=
“#000000”
>

</textview>

<textview android:id=
“@+id/tvCode”
android:layout_width=
“wrap_content”
android:layout_height=
“wrap_content”
android:layout_gravity=
“center_horizontal”
android:text=
“Info”
android:textcolor=
“#000000”
>

</textview>

</linearlayout>

3.java实现代码：MainActivity.java

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package com.example.horizontallistview;
import java.util.ArrayList;
import java.util.List;
import android.app.Activity;
import android.content.Context;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.LinearLayout;
import android.widget.RelativeLayout;
import android.widget.TextView;
/***
 * 
 * @author ymw
 * @summary 博客地址欢迎访问： http://www.cnblogs.com/_ymw
 */
public class MainActivity extends Activity {
    List<CityItem> cityList;
    RelativeLayout itmel;
    GridView gridView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        LayoutInflater layoutInflater = (LayoutInflater) this
                .getSystemService("layout_inflater");
        gridView = (GridView) findViewById(R.id.grid);
        setData();
        setGridView();
    }
    /**设置数据*/
    private void setData() {
        cityList = new ArrayList<CityItem>();
        CityItem item = new CityItem();
        item.setCityName("深圳");
        item.setCityCode("0755");
        cityList.add(item);
        item = new CityItem();
        item.setCityName("上海");
        item.setCityCode("021");
        cityList.add(item);
        item = new CityItem();
        item.setCityName("广州");
        item.setCityCode("020");
        cityList.add(item);
        item = new CityItem();
        item.setCityName("北京");
        item.setCityCode("010");
        cityList.add(item);
        item = new CityItem();
        item.setCityName("武汉");
        item.setCityCode("027");
        cityList.add(item);
        item = new CityItem();
        item.setCityName("孝感");
        item.setCityCode("0712");
        cityList.add(item);
        cityList.addAll(cityList);
    }
    /**设置GirdView参数，绑定数据*/
    private void setGridView() {
        int size = cityList.size();
        int length = 100;
        DisplayMetrics dm = new DisplayMetrics();
        getWindowManager().getDefaultDisplay().getMetrics(dm);
        float density = dm.density;
        int gridviewWidth = (int) (size * (length + 4) * density);
        int itemWidth = (int) (length * density);
        LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
                gridviewWidth, LinearLayout.LayoutParams.FILL_PARENT);
        gridView.setLayoutParams(params); // 设置GirdView布局参数,横向布局的关键
        gridView.setColumnWidth(itemWidth); // 设置列表项宽
        gridView.setHorizontalSpacing(5); // 设置列表项水平间距
        gridView.setStretchMode(GridView.NO_STRETCH);
        gridView.setNumColumns(size); // 设置列数量=列表集合数
        GridViewAdapter adapter = new GridViewAdapter(getApplicationContext(),
                cityList);
        gridView.setAdapter(adapter);
    }
    /**GirdView 数据适配器*/
    public class GridViewAdapter extends BaseAdapter {
        Context context;
        List<CityItem> list;
        public GridViewAdapter(Context _context, List<CityItem> _list) {
            this.list = _list;
            this.context = _context;
        }
        @Override
        public int getCount() {
            return list.size();
        }
        @Override
        public Object getItem(int position) {
            return list.get(position);
        }
        @Override
        public long getItemId(int position) {
            return position;
        }
        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            LayoutInflater layoutInflater = LayoutInflater.from(context);
            convertView = layoutInflater.inflate(R.layout.list_item, null);
            TextView tvCity = (TextView) convertView.findViewById(R.id.tvCity);
            TextView tvCode = (TextView) convertView.findViewById(R.id.tvCode);
            CityItem city = list.get(position);
            tvCity.setText(city.getCityName());
            tvCode.setText(city.getCityCode());
            return convertView;
        }
    }
    public class CityItem {
        private String cityName;
        private String cityCode;
        public String getCityName() {
            return cityName;
        }
        public void setCityName(String cityName) {
            this.cityName = cityName;
        }
        public String getCityCode() {
            return cityCode;
        }
        public void setCityCode(String cityCode) {
            this.cityCode = cityCode;
        }
    }
}