横向Gridview使用

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

`<?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>`

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

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;        }    }}