How to realize the effect of drop-down list by Android Studio
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Title
Use ArrayAdapter to implement a city's drop-down list.
Answer
Activity_main.xml:
City.xml:
Beijing, Shanghai, Wuhan, Nanjing, Nanchang, Shenzhen, Changsha, Guangzhou, Kunming, Guiyang, Harbin, Suzhou, Hangzhou, Nanyang Shijiazhuang, Jinan, Yinchuan, Hohhot, Xi'an Hefei, Zhengzhou, Qingdao, Taipei, Lanzhou, Taiyuan, Urumqi, Haikou, Shenyang, Fuzhou, Nanning, Chengdu, Changchun, Lhasa Xining
MainActivity.java:
Package com.example.myapplication;import android.app.Activity;import android.os.Bundle;import android.widget.ArrayAdapter;import android.widget.Spinner;public class MainActivity extends Activity {@ Overrideprotected void onCreate (Bundle savedInstanceState) {super.onCreate (savedInstanceState); setContentView (R.layout.activity_main); Spinner spinner= (Spinner) findViewById (R.id.spinner1); / / initialize the control String [] city=getResources () .getStringArray (R.array.spinnername) / / create the data source ArrayAdapteradapter= new ArrayAdapter (this,android.R.layout.simple_spinner_item,city); / / create the Adapter and bind the data source / / the first parameter indicates which Activity is displayed, the second parameter is the style of the system drop-down box, and the third parameter is the array. Spinner.setAdapter (adapter); / / bind Adapter to the control}}
Running result
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