GridView控件

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GridView的使用（以仿手机桌面为例）
Eg.

<GridView        android:id="@+id/gridView"        android:layout_width="match_parent"        android:layout_height="match_parent"        android:horizontalSpacing="10dp"        android:numColumns="3"        android:verticalSpacing="10dp">

重要属性:

android:horizontalSpacing="10dp"

列与列的间距（横着看）

android:verticalSpacing="10dp"

行与行的间距（竖着看）

android:numColumns="3"

列数
先来张效果图：
GridView网格效果

使用方法如下：

public class UIMainActivity extends BaseActivity implements AdapterView.OnItemClickListener {    private Intent intent;    private GridView gridView;    private SimpleAdapter adapter;    private List<Map<String, Object>> lists = new ArrayList<Map<String, Object>>();    private String[] text = new String[]{"alertDialog", "switch", "DatePicker", "TimePicker","spinner"};    private int[] icon = new int[]{R.mipmap.ic_launcher, R.mipmap.ic_launcher,            R.mipmap.ic_launcher, R.mipmap.ic_launcher, R.mipmap.ic_launcher};    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        requestWindowFeature(Window.FEATURE_NO_TITLE);        setContentView(R.layout.ui_main_layout);        gridView = (GridView) findViewById(R.id.gridView);        adapter = new SimpleAdapter(this, getData(), R.layout.gridview_item, new String[]{"icon", "text"}, new int[]{R.id.icon, R.id.text});        gridView.setAdapter(adapter);        gridView.setOnItemClickListener(this);    }    private List<Map<String, Object>> getData() {        for (int i = 0; i < icon.length; i++) {            Map<String, Object> map = new HashMap<String, Object>();            map.put("icon", icon[i]);            map.put("text", text[i]);            lists.add(map);        }        return lists;    }    @Override    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {        switch (position) {            case 0:                intent = new Intent(UIMainActivity.this, AlertDialogActivity.class);                startActivity(intent);                break;            case 1:                intent = new Intent(UIMainActivity.this, SwitchActivity.class);                startActivity(intent);                break;        }    }}

添加数据
构造适配器

这里选用SimpleAdapter，构造方法使用了
new SimpleAdapter(this, getData(), R.layout.gridview_item, new String[]{"icon", "text"}, new int[]{R.id.icon, R.id.text});
其中gridview_item是在drawable中新建的子布局，在gridview_item中只添加了imageView和TextView来实现手机桌面图标的效果，getData()方法返回一个List<Map<String, Object>> 类型的数据来作为适配器的数据源

3.添加适配器

直接调用setAdapter(adapter);即可

4.添加监听事件

setOnItemClickListener与onItemClick即可哦，position就是你点击的第几项，从0开始计数

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