Bind a spinner in the activity

(1) A major layout file activity_main is required.

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="${packageName}.${activityClass}" >    <TextView        android:id="@+id/title"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_alignParentLeft="true"        android:layout_alignRight="@id/title"        android:text="Spinner" />    <Spinner        android:id="@+id/city"        android:layout_width="82dp"        android:layout_height="30dp"        android:layout_alignParentLeft="true"        android:layout_below="@+id/title"        android:layout_marginTop="18dp"        android:layout_weight="0.15" /></RelativeLayout>

(2) code implementation

 MainActivity.java

package com.liuzuyi.sp;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;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 spin=(Spinner)findViewById(R.id.city);    ArrayAdapter<CharSequence> adapter =  ArrayAdapter.createFromResource(this, R.array.city, android.R.layout.simple_spinner_item);         adapter.setDropDownViewResource(android.R.layout.simple_spinner_item);         spin.setAdapter(adapter); }}

This is different from implementing the spinner binding in the fragement framework, which will be explained in my next article.