橫向Gridview使用

1.主介面佈局程式碼：activity_main.xml

a.包裹HorizontalScrollView控制元件是GirdView橫向滾動的基本條件
b.GirdView外包裹LinearLayout是java程式碼中引數設定的必要條件

`<?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.主介面GridView列表子項佈局檔案：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實現程式碼：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;

/***
 * 
 */
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();
    }
    /**設定資料*/
    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("廣州");
        item.setCityCode("020");
        cityList.add(item);
        item = new CityItem();
        item.setCityName("北京");
        item.setCityCode("010");
        cityList.add(item);
        item = new CityItem();
        item.setCityName("武漢");
        item.setCityCode("027");
        cityList.add(item);
        item = new CityItem();
        item.setCityName("孝感");
        item.setCityCode("0712");
        cityList.add(item);
        cityList.addAll(cityList);
    }

    /**設定GirdView引數，繫結資料*/
    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); // 設定GirdView佈局引數,橫向佈局的關鍵
        gridView.setColumnWidth(itemWidth); // 設定列表項寬
        gridView.setHorizontalSpacing(5); // 設定列表項水平間距
        gridView.setStretchMode(GridView.NO_STRETCH);
        gridView.setNumColumns(size); // 設定列數量=列表集合數

        GridViewAdapter adapter = new GridViewAdapter(getApplicationContext(),
                cityList);
        gridView.setAdapter(adapter);
    }

    /**GirdView 資料介面卡*/
    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;
        }
    }
}