UI组件之AdapterView及其子类（二）GridView网格视图的使用

GridView网格视图属性：

UI组件之AdapterView及其子类（二）GridView网格视图的使用_第1张图片

android:numColumns="auto_fit" --------列数设置为自动，可以为确定的数值
android:columnWidth="90dp"，----------每列的宽度，也就是Item的宽度
android:verticalSpacing="10dp"----------各单元格垂直边距
android:horizontalSpacing="10dp"-------各单元格水平边距

android:stretchMode------设置拉伸模式

UI组件之AdapterView及其子类（二）GridView网格视图的使用_第2张图片

none：不拉伸

spacingWidth:缩放与列宽大小同步

columnWidth:缩放与列宽大小同步

GridView 按行，列的形式来组织显示多个组件，ListView是GridView的特例。使用adpater使用方法与ListView一样

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

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(R.layout.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, R.layout.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="http://schemas.android.com/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="http://schemas.android.com/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>

UI组件之AdapterView及其子类（二）GridView网格视图的使用_第3张图片

另外一个：

main.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/root"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"><!-- GridView 组件的几个新属性 ，android:numColumns="4"该网格包含4列，包含多少行是动态改变的，由adapter决定-->    <GridView        android:id="@+id/gridView1"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center"        android:horizontalSpacing="1dp"               android:verticalSpacing="1dp"         android:numColumns="4">    </GridView><!-- ImageView组件 -->    <ImageView        android:id="@+id/imageView1"        android:layout_width="240dp"        android:layout_height="240dp"        android:layout_gravity="center_horizontal"        android:src="@drawable/bomb5" /></LinearLayout>

cell.xml

<?xml version="1.0" encoding="UTF-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"android:orientation="horizontal"android:layout_width="fill_parent"android:layout_height="fill_parent"android:gravity="center_horizontal"android:padding="2pt"><ImageViewandroid:id="@+id/image1"android:layout_width="50dp" android:layout_height="50dp" /></LinearLayout>

MainActivity.java

package com.example.gridviewtest;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.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.GridView;import android.widget.ImageView;import android.widget.SimpleAdapter;public class MainActivity extends Activity {/* * GridView 按行，列的形式来组织显示多个组件，ListView是GridView的特例。使用adpater使用方法与ListView一样 *  * */GridView grid;ImageView imageview;//图片的Idint[] imagesIds=new int[]{R.drawable.bomb5,R.drawable.bomb6,R.drawable.bomb7,R.drawable.bomb8,R.drawable.bomb9,R.drawable.bomb10,R.drawable.bomb11,R.drawable.bomb12,R.drawable.bomb13,R.drawable.bomb14,R.drawable.bomb15,R.drawable.bomb16};    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                imageview= (ImageView) findViewById(R.id.imageView1);        //创建一个List对象，List独享的元素是Map        List<Map<String,Object>> listitems=new ArrayList<Map<String,Object>>();        for(int i=0;i<imagesIds.length;i++){        Map<String,Object> item=new HashMap<String,Object>();        item.put("image", imagesIds[i]);        listitems.add(item);        }        //使用自定义的布局cell.xml定义SimpleAdapter        SimpleAdapter ad=new SimpleAdapter(this,listitems,R.layout.cell,new String[]{"image"},new int[]{R.id.image1});                grid=(GridView) findViewById(R.id.gridView1);        //设置适配器        grid.setAdapter(ad);        //添加列表项被单击时的监听器        grid.setOnItemClickListener(new OnItemClickListener(){@Overridepublic void onItemClick(AdapterView<?> parent, View view,int position, long id) {// TODO Auto-generated method stubimageview.setImageResource(imagesIds[position]);}                });            }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }}

UI组件之AdapterView及其子类（二）GridView网格视图的使用_第4张图片

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