Controls related to Adapter in android ---- GridView and androidadapter controls

Controls related to Adapter in android ---- GridView and androidadapter controls

GridView (grid view)

1. The GridView (grid view) has many controls, which are the same as listView in many places. However, the GridView can display multiple columns, while the listView can only display one column, I personally think this is the biggest difference. Common attributes:

Android: columnWidth: Set the column width

Android: gravity: Alignment of components

Android: horizontalSpacing: The spacing of each cell in the horizontal direction

Android: verticalSpacing: spacing of each cell in the vertical direction

Android: numColumns: set the number of columns. The default value is 1.

Android: stretchMode: sets the stretch mode. Optional values: none. spacingWidth: just stretch the table element's own spacingWidthUniform to stretch both the element spacing and the gap between them

Ii. Use instances

<?xml version="1.0" encoding="utf-8"?><LinearLayout    xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical">    <GridView        android:layout_width="match_parent"        android:layout_height="match_parent"        android:numColumns="2"        android:id="@+id/gv">    </GridView></LinearLayout>

<? Xml version = "1.0" encoding = "UTF-8"?> <LinearLayout xmlns: android = "http://schemas.android.com/apk/res/android" android: layout_width = "match_parent" android: layout_height = "match_parent" android: orientation = "horizontal"> <ImageView android: id = "@ + id/image1" android: layout_width = "100dp" android: layout_height = "100dp" android: src = "@ mipmap/ic_launcher"/> <TextView android: id = "@ + id/text1" android: layout_width = "match_parent" android: layout_height = "100dp" android: gravity = "center" android: text = "Haha" android: textSize = "30sp"/> </LinearLayout>

Java files

Package com. example. test3; import android. app. activity; import android. OS. bundle; import android. widget. gridView; import android. widget. simpleAdapter; import java. util. arrayList; import java. util. hashMap; import java. util. list; import java. util. map; public class MainActivity extends Activity {private GridView; private List <Map <String, Object> list; private SimpleAdapter adapter; @ Override protected void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); setContentView (R. layout. activity_main); gridView = (GridView) findViewById (R. id. gv); list = new ArrayList <> (); for (int I = 0; I <10; I ++) {Map <String, object> map = new HashMap <> (); map. put ("image", R. mipmap. ic_launcher); map. put ("content", "Haha" + I); list. add (map);} adapter = new SimpleAdapter (MainActivity. this, list, R. layout. item, new String [] {"image", "content"}, new int [] {R. id. image1, R. id. text1}); gridView. setAdapter (adapter );}}