Android控件之GridView用法实例分析

本文实例讲述了android控件之gridview用法。分享给大家供大家参考。具体如下：

gridview是一项显示二维的viewgroup，可滚动的网格。一般用来显示多张图片。
以下模拟九宫图的实现，当鼠标点击图片时会进行相应的跳转链接。

目录结构如下：

main.xml布局文件，存放gridview控件

<?xml version="1.0" encoding="utf-8"?>
<!-- 
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
 -->
<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"
/>

night_item.xml布局文件，存放显示控件

<?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:layout_width="wrap_content"
    android:layout_centerhorizontal="true"
    android:id="@+id/itemimage" >
  </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>

strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
  <string name="hello">hello world, gvactivity!</string>
  <string name="app_name">九宫图</string>
  <string name="test_name1">跳转到testactivity1</string>
  <string name="test_name2">跳转到testactivity2</string>
  <string name="test_name3">跳转到testactivity3</string>
</resources>

清单文件

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
   package="com.ljq.gv"
   android:versioncode="1"
   android:versionname="1.0">
  <application android:icon="@drawable/icon" android:label="@string/app_name">
    <activity android:name=".gvactivity"
         android:label="@string/app_name">
      <intent-filter>
        <action android:name="android.intent.action.main" />
        <category android:name="android.intent.category.launcher" />
      </intent-filter>
    </activity>
    <activity android:name=".testactivity1" android:label="@string/test_name1"/>
    <activity android:name=".testactivity2" android:label="@string/test_name2"/>
    <activity android:name=".testactivity3" android:label="@string/test_name3"/>
  </application>
  <uses-sdk android:minsdkversion="7" />
</manifest> 

跳转类testactivity1、testactivity2、testactivity3

package com.ljq.gv;
import android.app.activity;
import android.os.bundle;
public class testactivity1 extends activity {
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    //setcontentview(r.layout.main);
  }
}
package com.ljq.gv;
import android.app.activity;
import android.os.bundle;
public class testactivity2 extends activity {
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    //setcontentview(r.layout.main);
  }
}
package com.ljq.gv;
import android.app.activity;
import android.os.bundle;
public class testactivity3 extends activity {
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    //setcontentview(r.layout.main);
  }
}

类gvactivity：

package com.ljq.gv;
import java.util.arraylist;
import java.util.hashmap;
import android.app.activity;
import android.content.intent;
import android.os.bundle;
import android.view.view;
import android.widget.adapterview;
import android.widget.gridview;
import android.widget.simpleadapter;
import android.widget.toast;
import android.widget.adapterview.onitemclicklistener;
public class gvactivity extends activity {
  private string texts[] = null;
  private int images[] = null;
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.main);
    images=new int[]{r.drawable.p1, r.drawable.p2,
        r.drawable.p3, r.drawable.p4, 
        r.drawable.p5,r.drawable.p6, 
        r.drawable.p7,r.drawable.p8};
    texts = new string[]{ "宫式布局1", "宫式布局2",
        "宫式布局3", "宫式布局4", 
        "宫式布局5", "宫式布局6",
        "宫式布局7", "宫式布局8"};
    gridview gridview = (gridview) findviewbyid(r.id.gridview);
    arraylist<hashmap<string, object>> lstimageitem = new arraylist<hashmap<string, object>>();
    for (int i = 0; i < 8; i++) {
      hashmap<string, object> map = new hashmap<string, object>();
      map.put("itemimage", images[i]);
      map.put("itemtext", texts[i]);
      lstimageitem.add(map);
    }
    simpleadapter saimageitems = new simpleadapter(this, 
        lstimageitem,// 数据源
        r.layout.night_item,// 显示布局
        new string[] { "itemimage", "itemtext" }, 
        new int[] { r.id.itemimage, r.id.itemtext }); 
    gridview.setadapter(saimageitems);
    gridview.setonitemclicklistener(new itemclicklistener());
  }
  class itemclicklistener implements onitemclicklistener {
    /**
     * 点击项时触发事件
     * 
     * @param parent 发生点击动作的adapterview
     * @param view 在adapterview中被点击的视图(它是由adapter提供的一个视图)。
     * @param position 视图在adapter中的位置。
     * @param rowid 被点击元素的行id。
     */
    public void onitemclick(adapterview<?> parent, view view, int position, long rowid) {
      hashmap<string, object> item = (hashmap<string, object>) parent.getitematposition(position);
      //获取数据源的属性值
      string itemtext=(string)item.get("itemtext");
      object object=item.get("itemimage");
      toast.maketext(gvactivity.this, itemtext, toast.length_long).show();
      //根据图片进行相应的跳转
      switch (images[position]) {
      case r.drawable.p1:
        startactivity(new intent(gvactivity.this, testactivity1.class));//启动另一个activity
        finish();//结束此activity，可回收
        break;
      case r.drawable.p2:
        startactivity(new intent(gvactivity.this, testactivity2.class));
        finish();
        break;
      case r.drawable.p3:
        startactivity(new intent(gvactivity.this, testactivity3.class));
        finish();
        break;
      }
    }
  }
}

运行结果

希望本文所述对大家的android程序设计有所帮助。