Spinner2
16lz
2021-01-25
MainActivity.java
package com.example.spinnertest2;import java.util.ArrayDeque;import java.util.ArrayList;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.widget.ArrayAdapter;import android.widget.Spinner;/*简单实现了ArrayAdapter实例 * */public class MainActivity extends Activity { private Spinner mSpinner_city; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mSpinner_city = (Spinner) findViewById(R.id.spn_city); ArrayList<String> list = new ArrayList<String>(); list.add("fuqing"); list.add("quanzhou"); list.add("xiamen");// 主要第三个参数的item必须在在第二个参数的layout中,否则会报错 ArrayAdapter<String> adapter = new ArrayAdapter<String>(MainActivity.this, R.layout.item, R.id.tv_item, list); mSpinner_city.setAdapter(adapter); mSpinner_city.setPrompt("city"); }}**activity_main**
<?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" > <TextView android:id="@+id/tv_item" android:layout_width="match_parent" android:layout_height="wrap_content"/></LinearLayout>
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