欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  移动技术

Android控件之GridView用法实例分析

程序员文章站 2023-11-25 09:57:52
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...

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:

Android控件之GridView用法实例分析

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

Android控件之GridView用法实例分析

希望本文所述对大家的android程序设计有所帮助。