Android various adapter usage

Arrayadapter is relatively simple, but it can only be used to display text.

1  Public classMainactivityextendsappcompatactivity {2     PrivateSpinner Myspinner;3     PrivateArraylist<string> mlist=NewArraylist<string>();4     PrivateArrayadapter Myadapter;5 @Override6     protected voidonCreate (Bundle savedinstancestate) {7         Super. OnCreate (savedinstancestate);8 Setcontentview (r.layout.activity_main);9Myspinner=(Spinner) Findviewbyid (r.id.spinner);TenMyadapter=NewArrayadapter<string> ( This, Android. R.layout.select_dialog_item,getdata (mlist)); One Myspinner.setadapter (myadapter); A     } -     PrivateArraylist<string> GetData (arraylist<string>marraylist) { -Marraylist.add ("中文版")); theMarraylist.add ("China"); -         returnmarraylist; -}

Arrayadapter main function

1   <Spinner2         android:id= "@+id/spinner"3         android:layout_width= "Match_parent" 4         android:layout_height= "Wrap_content"5         android:layout_weight= "1"/>

about the XML layout of spinner

The context is the current environment variable, Textviewresourceid for the page layout,list<t> represents the data source.

Simpleadapter is highly scalable and can be customized to a variety of effects

1 Importandroid.support.v7.app.AppCompatActivity;2 ImportAndroid.os.Bundle;3 ImportAndroid.widget.SimpleAdapter;4 ImportAndroid.widget.Spinner;5 Importjava.util.ArrayList;6 ImportJava.util.HashMap;7 Importjava.util.List;8 9 /**Ten  * @authorLinjintang One  */ A  Public classMainactivityextendsappcompatactivity { -     PrivateSpinner Myspinner; -     PrivateSimpleadapter Mysimpleadapter; the     PrivateListMyhashmaps; -     PrivateHashmap<string,object>Mymap; -  - @Override +     protected voidonCreate (Bundle savedinstancestate) { -         Super. OnCreate (savedinstancestate); + Setcontentview (r.layout.activity_main); AMyspinner =(Spinner) Findviewbyid (r.id.spinner); atMysimpleadapter=NewSimpleadapter ( This, GetData (), R.layout.spinner_layout,Newstring[]{"image", "title", "Info"},New int[]{r.id.img,r.id.title,r.id.info}]; - Myspinner.setadapter (mysimpleadapter); -     } -     PrivateListGetData () { -myhashmaps=NewArraylist(); -mymap=NewHashmap<string,object>(); inMymap.put ("image", R.DRAWABLE.IMG1); -Mymap.put ("title", "China"); toMymap.put ("info", "I like China"); + Myhashmaps.add (mymap); -  themymap=NewHashmap<string,object>(); *Mymap.put ("image", R.DRAWABLE.IMG2); $Mymap.put ("title", "FRANCE");Panax NotoginsengMymap.put ("info", "I like FRANCE"); - Myhashmaps.add (mymap); the  +mymap=NewHashmap<string,object>(); AMymap.put ("image", R.DRAWABLE.IMG3); theMymap.put ("title", "中文版")); +Mymap.put ("info", "I like 中文版"); - Myhashmaps.add (mymap); $     returnMyhashmaps; $     } -}

simpleadapter Function Code

1<?xml version= "1.0" encoding= "Utf-8"?>2<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"3xmlns:app= "Http://schemas.android.com/apk/res-auto"4Android:layout_width= "Match_parent"5android:layout_height= "Match_parent"6android:orientation= "Horizontal" >7 8<ImageView9Android:id= "@+id/img"TenAndroid:layout_width= "100DP" Oneandroid:layout_height= "80DP" Aapp:srccompat= "@mipmap/ic_launcher"/> -  -<LinearLayout theAndroid:layout_width= "Match_parent" -android:layout_height= "Match_parent" -android:orientation= "Vertical" > -  +<TextView -Android:id= "@+id/title" +Android:layout_width= "Match_parent" Aandroid:layout_height= "50DP" atAndroid:textsize= "20DP" -android:gravity= "Center" -android:text= "TextView"/> -  -<TextView -Android:id= "@+id/info" inAndroid:layout_width= "Match_parent" -android:layout_height= "30DP" toandroid:gravity= "Center" +android:text= "TextView"/> -</LinearLayout> the</LinearLayout>

simpleapadter Page Layout code

1<?xml version= "1.0" encoding= "Utf-8"?>2<linearlayout xmlns:android= "Http://schemas.android.com/apk/res/android"3xmlns:app= "Http://schemas.android.com/apk/res-auto"4Xmlns:tools= "Http://schemas.android.com/tools"5Android:layout_width= "Match_parent"6android:layout_height= "Match_parent"7tools:context= "Angrypig.lookingstar.MainActivity" >8 9 Ten<Spinner OneAndroid:id= "@+id/spinner" AAndroid:layout_width= "Match_parent" -android:layout_height= "Wrap_content" -android:layout_weight= "1"/> the</LinearLayout>

about the XML layout of spinner

Context is the current environment variable, Textviewresourceid for the page layout,list<t> represents the data source, the form corresponding to map key,to corresponding to the layout file ID.

Android various adapter usage