下拉框spinner

repositories {
    flatDir {
        dirs 'libs' //就是你放aar的目录地址
 maven { url "https://jitpack.io" }
 }
}
dependencies {
 implementation fileTree(include: ['*.jar'], dir: 'libs')
 implementation 'com.android.support:appcompat-v7:27.1.1'
 implementation 'com.android.support.constraint:constraint-layout:1.1.0'
 testImplementation 'junit:junit:4.12'
 androidTestImplementation 'com.android.support.test:runner:1.0.2'
 androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'

  compile 'com.github.arcadefire:nice-spinner:1.3.1'
}

xml中

<org.angmarch.views.NiceSpinner

    android:id="@+id/spinner1"
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:layout_weight="1"
 android:layout_marginRight="1dp"/>

spinner1.attachDataSource(list1_yuzhong);
spinner1.addOnItemClickListener(new AdapterView.OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
 String name = list1_yuzhong.get(position).toString();//点击的条目