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This article mainly explains "Android Studio how to achieve the drop-down list effect", the content of the article is simple and clear, easy to learn and understand, now please follow the editor's ideas slowly in depth, together to study and learn "Android Studio how to achieve the drop-down list effect" bar!

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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