android组件GridView简单使用

GridView与ListView的用法基本一致，不同的只是布局。当我们打开手机，应用会以宫格显示，那就是GridView。
以代码形式展示给大家，适配器使用SimpleAdapter，熟悉了适配器的用法，就只需要注意几个GridView的属性即可。

Activity类

public class MainActivity extends Activity {
    private GridView gridView;
    private List> dataList;
    private SimpleAdapter adapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gridView = (GridView) findViewById(R.id.gridview);
        //初始化数据
        initData();

        String[] from={"img","text"};

        int[] to={R.id.img,R.id.text};

        adapter=new SimpleAdapter(this, dataList, R.layout.gridview_item, from, to);

        gridView.setAdapter(adapter);

        gridView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView arg0, View arg1, int arg2,
                    long arg3) {
            AlertDialog.Builder builder= new AlertDialog.Builder(MainActivity.this);
            builder.setTitle("提示").setMessage(dataList.get(arg2).get("text").toString()).create().show();
            }
        });
    }

    void initData() {
        //图标
        int icno[] = { R.drawable.i1, R.drawable.i2, R.drawable.i3,
                R.drawable.i4, R.drawable.i5, R.drawable.i6, R.drawable.i7,
                R.drawable.i8, R.drawable.i9, R.drawable.i10, R.drawable.i11, R.drawable.i12 };
        //图标下的文字
        String name[]={"时钟","信号","宝箱","秒钟","大象","FF","记事本","书签","印象","商店","主题","迅雷"};
        dataList = new ArrayList>();
        for (int i = 0; i  map=new HashMap();
            map.put("img", icno[i]);
            map.put("text",name[i]);
            dataList.add(map);
        }
    }

}

GridView主布局文件activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#000"
    tools:context="com.example.l7.MainActivity" >
    <GridView
        android:id="@+id/gridview"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:columnWidth="80dp"
        android:stretchMode="spacingWidthUniform"
        android:numColumns="3" 
         />
LinearLayout>

列表项布局gridview_item.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:orientation="vertical" >

    <ImageView
        android:id="@+id/img"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:layout_marginTop="10dp" 
        android:src="@drawable/ic_launcher" />
    <TextView
        android:id="@+id/text"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="2dp" 
        android:layout_gravity="center"
        android:textColor="#FFF"
        android:text="文字"
        />

LinearLayout>

效果图

gridview的android:stretchMode

stretchMode 可选值：
columnWidth 如果列有空闲空间就加宽列
spacingWidth 如果列有空闲空间就加宽各列间距
none 没有任何动作
spacingWidthUniform 平均分配空间
上图使用spacingWidthUniform

none效果

columnWidth效果

spacingWidth效果