Android 下拉框 spinner Demo

compile 'com.jaredrummler:material-spinner:1.3.1'

package com.mingshine.msspinnerdemo;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;

import com.jaredrummler.materialspinner.MaterialSpinner;

public class MainActivity extends AppCompatActivity {
    private static final String[] ANDROID_VERSIONS = {
            "Cupcake",
            "Donut",
            "Eclair",
            "Froyo",
            "Gingerbread",
            "Honeycomb",
            "Ice Cream Sandwich",
            "Jelly Bean",
            "KitKat",
            "Lollipop",
            "Marshmallow",
            "Nougat",
            "Oreo"
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        MaterialSpinner spinner = (MaterialSpinner) findViewById(R.id.spinner);
        spinner.setItems(ANDROID_VERSIONS);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.mingshine.msspinnerdemo.MainActivity">

    <com.jaredrummler.materialspinner.MaterialSpinner
        android:id="@+id/spinner"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/>

</android.support.constraint.ConstraintLayout>