GridView布局

2017.10.03今天下午学习了Gridview布局，大体上和ListView是一样的，但它有几个特殊的属性
android:numColumns=”3”
android:verticalSpacing=”10dp” 竖直间距
android:horizontalSpacing=”10dp”水平间距

<GridView
        android:id="@+id/gridview"
        android:layout_width="368dp"
        android:layout_height="495dp"

        android:numColumns="3"
        android:verticalSpacing="10dp"
        android:horizontalSpacing="10dp"
        tools:layout_editor_absoluteX="8dp"
        tools:layout_editor_absoluteY="8dp" />

public class MainActivity extends AppCompatActivity {
    private GridView gridView;
    private SimpleAdapter simpleAdapter;
    private List<Map<String,Object>> data_list;

    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        gridView=(GridView)findViewById(R.id.gridview);
        data_list=new ArrayList<Map<String, Object>>();
        simpleAdapter=new SimpleAdapter(this,getData(),R.layout.gridview_item,new String[]{"pic","text"},new int[]{R.id.imageView,R.id.textView});
        gridView.setAdapter(simpleAdapter);
    }
    private List<Map<String,Object>> getData(){
        for(int i=0;i<9;i++) {
            Map<String, Object> map = new HashMap<String, Object>();
            map.put("pic", R.mipmap.ic_launcher);
            map.put("text","无敌的天宇");
            data_list.add(map);
        }
        return data_list;
    }
}