【Android -- UI 开发】GridView 的基本使用

前言

本节给大家介绍的是第二个 Adapter 类的控件—— GridView (网格视图)。

属性

• android:columnWidth：设置列的宽度
• android:gravity：组件对其方式
• android:horizontalSpacing：水平方向每个单元格的间距
• android:verticalSpacing：垂直方向每个单元格的间距
• android:numColumns：设置列数
• android:stretchMode：设置拉伸模式，可选值如下： none：不拉伸；
• spacingWidth：拉伸元素间的间隔空隙
• columnWidth：仅仅拉伸表格元素自身
• spacingWidthUniform：既拉元素间距又拉伸他们之间的间隔空袭

简单实例

1. 效果图 2. 布局文件

• item_grid_icon.xml:

• activity_main.xml：

3. 实体类

public class Icon {
    private int iId;
    private String iName;

    public Icon() {
    }

    public Icon(int iId, String iName) {
        this.iId = iId;
        this.iName = iName;
    }

    public int getiId() {
        return iId;
    }

    public String getiName() {
        return iName;
    }

    public void setiId(int iId) {
        this.iId = iId;
    }

    public void setiName(String iName) {
        this.iName = iName;
    }
}

4. MainActivity.java

public class MainActivity extends AppCompatActivity {

    private Context mContext;
    private GridView grid_photo;
    private BaseAdapter mAdapter = null;
    private ArrayList mData = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        mContext = MainActivity.this;
        grid_photo = (GridView) findViewById(R.id.grid_photo);

        mData = new ArrayList();
        mData.add(new Icon(R.mipmap.iv_icon_1, "图标1"));
        mData.add(new Icon(R.mipmap.iv_icon_2, "图标2"));
        mData.add(new Icon(R.mipmap.iv_icon_3, "图标3"));
        mData.add(new Icon(R.mipmap.iv_icon_4, "图标4"));
        mData.add(new Icon(R.mipmap.iv_icon_5, "图标5"));
        mData.add(new Icon(R.mipmap.iv_icon_6, "图标6"));
        mData.add(new Icon(R.mipmap.iv_icon_7, "图标7"));

        mAdapter = new MyAdapter(mData, R.layout.item_grid_icon) {
            @Override
            public void bindView(ViewHolder holder, Icon obj) {
                holder.setImageResource(R.id.img_icon, obj.getiId());
                holder.setText(R.id.txt_icon, obj.getiName());
            }
        };

        grid_photo.setAdapter(mAdapter);

        grid_photo.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView parent, View view, int position, long id) {
                Toast.makeText(mContext, "你点击了~" + position + "~项", Toast.LENGTH_SHORT).show();
            }
        });

    }

}