GridView

第一种方式：用SimpleAdapter

先来贴出本文代码运行的结果：

本文需要添加/修改3个文件：main.xml、night_item.xml、JAVA源代码。

main.xml源代码如下，本身是个GirdView，用于装载Item：

<?xml version="1.0" encoding="utf-8"?><GridView xmlns:android="http://schemas.android.com/apk/res/android"     android:id="@+id/gridview"    android:layout_width="fill_parent"     android:layout_height="fill_parent"    android:numColumns="auto_fit"    android:verticalSpacing="10dp"    android:horizontalSpacing="10dp"    android:columnWidth="90dp"    android:stretchMode="columnWidth"    android:gravity="center"/>

介绍一下里面的某些属性：

android:numColumns="auto_fit" ，GridView的列数设置为自动

android:columnWidth="90dp"，每列的宽度，也就是Item的宽度
android:stretchMode="columnWidth"，缩放与列宽大小同步
android:verticalSpacing="10dp"，两行之间的边距，如：行一(NO.0~NO.2)与行二(NO.3~NO.5)间距为10dp
android:horizontalSpacing="10dp"，两列之间的边距。

接下来介绍 night_item.xml，这个XML跟前面ListView的ImageItem.xml很类似：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout          xmlns:android="http://schemas.android.com/apk/res/android"          android:layout_height="wrap_content"          android:paddingBottom="4dip" android:layout_width="fill_parent">         <ImageView                android:layout_height="wrap_content"                android:id="@+id/ItemImage"                android:layout_width="wrap_content"                android:layout_centerHorizontal="true">          </ImageView>         <TextView                android:layout_width="wrap_content"                android:layout_below="@+id/ItemImage"                android:layout_height="wrap_content"                android:text="TextView01"                android:layout_centerHorizontal="true"                android:id="@+id/ItemText">         </TextView></RelativeLayout>

最后就是JAVA的源代码了，也跟前面的ListView的JAVA源代码很类似，不过多了“选中”的事件处理：

    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        GridView gridview = (GridView) findViewById(R.id.gridview);                //生成动态数组，并且转入数据        ArrayList<HashMap<String, Object>> lstImageItem = new ArrayList<HashMap<String, Object>>();        for(int i=0;i<10;i++)        {        HashMap<String, Object> map = new HashMap<String, Object>();        map.put("ItemImage", R.drawable.icon);//添加图像资源的IDmap.put("ItemText", "NO."+String.valueOf(i));//按序号做ItemText        lstImageItem.add(map);        }        //生成适配器的ImageItem <====> 动态数组的元素，两者一一对应        SimpleAdapter saImageItems = new SimpleAdapter(this, //没什么解释                                            lstImageItem,//数据来源                                             R.layout.night_item,//night_item的XML实现                                                                                        //动态数组与ImageItem对应的子项                                                    new String[] {"ItemImage","ItemText"},                                                                                         //ImageItem的XML文件里面的一个ImageView,两个TextView ID                                            new int[] {R.id.ItemImage,R.id.ItemText});        //添加并且显示        gridview.setAdapter(saImageItems);        //添加消息处理        gridview.setOnItemClickListener(new ItemClickListener());    }        //当AdapterView被单击(触摸屏或者键盘)，则返回的Item单击事件    class  ItemClickListener implements OnItemClickListener    {public void onItemClick(AdapterView<?> arg0,//The AdapterView where the click happened                           View arg1,//The view within the AdapterView that was clicked                          int arg2,//The position of the view in the adapter                          long arg3//The row id of the item that was clicked                          ) {//在本例中arg2=arg3HashMap<String, Object> item=(HashMap<String, Object>) arg0.getItemAtPosition(arg2);//显示所选Item的ItemTextsetTitle((String)item.get("ItemText"));}        }

第二种方式：用BaseAdapter

实现一个继承BaseAdapter的 ImageAdapter

package com.test;    import android.app.Activity;  import android.content.Context;  import android.os.Bundle;  import android.view.LayoutInflater;  import android.view.View;  import android.view.ViewGroup;  import android.widget.AdapterView;  import android.widget.BaseAdapter;  import android.widget.GridView;  import android.widget.ImageView;  import android.widget.TextView;  import android.widget.Toast;  import android.widget.AdapterView.OnItemClickListener;    public class GridViewActivity extends Activity {        //存放各功能图片      private Integer[] mFunctionPics = {R.drawable.mobilesecurity,R.drawable.infosecurity,              R.drawable.no_interrupt,R.drawable.bianjiejieting,R.drawable.xiaomishu              ,R.drawable.sms_send_attime,R.drawable.yule,R.drawable.setting};      //存放各功能的名称      private Integer[] mFunctionName = {R.string.phone_tools_box_name1,              R.string.phone_tools_box_name2,R.string.phone_tools_box_name3,              R.string.phone_tools_box_name4,R.string.phone_tools_box_name5,              R.string.phone_tools_box_name6,R.string.phone_tools_box_name7,              R.string.phone_tools_box_name8};      @Override      protected void onCreate(Bundle savedInstanceState) {          super.onCreate(savedInstanceState);          setContentView(R.layout.gridview_main);                    GridView girdview = (GridView) this.findViewById(R.id.girdview);          girdview.setAdapter(new ImageAdapter(this));          girdview.setOnItemClickListener(new OnItemClickListener() {              @Override              public void onItemClick(AdapterView<?> parent, View view,                      int position, long id) {                  Toast.makeText(GridViewActivity.this, "图片ID："+mFunctionPics[position],1).show();              }          });                }            public class ImageAdapter extends BaseAdapter{            private Context mContext;          private LayoutInflater inflater;          private class GirdTemp{              ImageView phone_function_pic;              TextView phone_function_name;          }          public ImageAdapter(Context c){              mContext = c;              inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);          }          @Override          public int getCount() {              return mFunctionPics.length;          }            @Override          public Object getItem(int position) {              return position;          }            @Override          public long getItemId(int position) {              return position;          }            @Override          public View getView(int position, View convertView, ViewGroup parent) {              GirdTemp temp;              if(convertView == null){                  convertView = inflater.inflate(R.layout.gridview_item, null);                  temp = new GirdTemp();                  temp.phone_function_pic = (ImageView) convertView.findViewById(R.id.function_view);                  temp.phone_function_name = (TextView) convertView.findViewById(R.id.function_name);                  convertView.setTag(holder);              }else{                  temp = (GirdHolder) convertView.getTag();              }              temp.phone_function_pic.setImageResource(mFunctionPics[position]);              temp.phone_function_name.setText(mFunctionName[position]);              return convertView;          }                }    }

girdview_main.xml代码如下：

<?xml version="1.0" encoding="utf-8"?>  <GridView xmlns:android="http://schemas.android.com/apk/res/android"       android:id="@+id/gridview"      android:layout_width="fill_parent"       android:layout_height="fill_parent"      android:numColumns="auto_fit"  //自动适应多少行    android:verticalSpacing="20dp"  //两行之间的距离    android:horizontalSpacing="20dp"  //两列之间的距离    android:gravity="center"  />

girdview_item.xml源码：

<?xml version="1.0" encoding="utf-8"?>  <RelativeLayout           xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_height="wrap_content" android:layout_width="fill_parent"          <ImageView>                   android:layout_width="wrap_content"                android:layout_height="wrap_content"<span style="white-space:pre"></span>android:id="@+id/function_view"<span style="white-space:pre"></span>android:layout_centerHorizontal="true"<span style="white-space:pre"></span></ImageView>          <TextView                  android:layout_width="wrap_content"                  android:layout_below="@+id/function_view"                  android:layout_height="wrap_content"                  android:layout_centerHorizontal="true"                  android:id="@+id/function_name">           </TextView>  </RelativeLayout>

Android之基于BaseAdapter和SimpleAdapter的GridView

GridView

第一种方式：用SimpleAdapter

第二种方式：用BaseAdapter

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