View--spinner

[android]代码库

1.MainActivity.java

package com.example.acer.myapplication;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);


            Spinner spinner = (Spinner) findViewById(R.id.spinner);
            ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
                    this, R.array.province, android.R.layout.simple_spinner_item);
            //定义下拉菜样式
            adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
            //为spinner设置适配器
            spinner.setAdapter(adapter);
            spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener()
            {
                public void onItemSelected(AdapterView<?> parent,View view, int pos, long id) {
                    Toast.makeText(parent.getContext(), "你来自的省份是： " +
                            parent.getItemAtPosition(pos).toString(), Toast.LENGTH_LONG).show();
                }

                public void onNothingSelected(AdapterView<?> parent) {
                    // TODO Auto-generated method stub
                }
            });
        }
    }

2.activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:padding="10dip"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    >
    <TextView
        android:id="@+id/text"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="10dip"
        android:text="@string/planet_prompt"
        />
    <Spinner
        android:id="@+id/spinner"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />
</LinearLayout>

3.res/values/strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <string name="planet_prompt">你来自的省份是</string>
    <string name="app_name">测试Spinner</string>
    <string-array name="province">
        <item>广东</item>
        <item>广西</item>
        <item>湖南</item>
        <item>河南</item>
        <item>福建</item>
    </string-array>
</resources>