安卓GridView的简单使用

String []name = {"1","2","3","4","5","6","7","8","9"};
List<Map<String,Object>>list = new ArrayList<Map<String, Object>>();
for (int i = 0; i < name.length; i++) {
    Map<String,Object>map = new HashMap<>();
    map.put("text",name[i]);
    list.add(map);
}
gridView = (GridView) findViewById(R.id.gridView);
gridView.setAdapter(new SimpleAdapter(context,list,R.layout.item,
        new String[]{"text"},new int[]{R.id.tv_item}));

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="GridView"
        android:layout_margin="10dp"
        android:textSize="25sp"
        android:textColor="#000000"
        android:layout_gravity="center"/>
    <GridView
        android:id="@+id/gridView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:numColumns="5"
        android:padding="1dp"
        android:background="#000000">
    </GridView>
</LinearLayout>
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/linearLayout"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">
    <TextView
        android:id="@+id/tv_item"
        android:layout_width="match_parent"
        android:layout_height="40dp"
        android:layout_gravity="center"
        android:layout_margin="1dp"
        android:background="#ffffff"
        android:gravity="center"
        android:singleLine="true" />
</LinearLayout>