Android控件GridView使用案例讲解

Android控件GridView使⽤案例讲解
Android：控件GridView的使⽤
如果是列表（单列多⾏形式）的使⽤ListView，如果是多⾏多列⽹状形式的优先使⽤GridView。

<?xml version="1.0" encoding="utf-8"?>
<GridView xmlns:android="/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</GridView>
GirdView的⼀些属性：
android:numColumns="auto_fit" --------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"----------垂直边距
android:horizontalSpacing="10dp"-------⽔平边距
1. 准备数据源
2. 新建适配器
3. 加载适配器
GridView(⽹格视图)是按照⾏列的⽅式来显⽰内容的，⼀般⽤于显⽰图⽚，图⽚等内容，⽐如实现九宫格图，⽤GridView是⾸选，也是最简单的，下⾯来个实例，
效果图：
MainActivity.java
package com.example.testgridview;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import android.app.Activity;
import android.os.Bundle;
import android.widget.GridView;
import android.widget.SimpleAdapter;
public class MainActivity extends Activity {
private GridView gview;
private List<Map<String, Object>> data_list;
private SimpleAdapter sim_adapter;
// 图⽚封装为⼀个数组
private int[] icon = { R.drawable.address_book, R.drawable.calendar,
R.drawable.camera, R.drawable.clock, R.drawable.games_control,
R.drawable.messenger, R.drawable.ringtone, R.drawable.settings,
R.drawable.speech_balloon, R.drawable.weather, R.drawable.world,
R.drawable.youtube };
private String[] iconName = { "通讯录", "⽇历", "照相机", "时钟", "游戏", "短信", "铃声", "设置", "语⾳", "天⽓", "浏览器", "视频" };
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(yout.test);
gview = (GridView) findViewById(R.id.gview);
//新建List
data_list = new ArrayList<Map<String, Object>>();
//获取数据
getData();
//新建适配器
String [] from ={"image","text"};
int [] to = {R.id.image,R.id.text};
sim_adapter = new SimpleAdapter(this, data_list, yout.item, from, to);
//配置适配器
gview.setAdapter(sim_adapter);
}
public List<Map<String, Object>> getData(){
//cion和iconName的长度是相同的，这⾥任选其⼀都可以
for(int i=0;i<icon.length;i++){
Map<String, Object> map = new HashMap<String, Object>();
map.put("image", icon[i]);
map.put("text", iconName[i]);
data_list.add(map);
}
return data_list;
}
}
test.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#000"
>
<GridView
android:id="@+id/gview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:numColumns="auto_fit"
android:columnWidth="80dp"
android:stretchMode="columnWidth"
></GridView>
</LinearLayout>
item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="vertical"
android:gravity="center"
android:padding="10dp"
>
<ImageView
android:src="@drawable/ic_launcher"
android:id="@+id/image"
android:layout_width="60dp"
android:layout_height="60dp"
/>
<TextView
android:id="@+id/text"
android:layout_marginTop="5dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#ffffff"
android:text="⽂字"
/>
</LinearLayout>
监听接⼝： onItemClickListener
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