<?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"><AutoCompleteTextViewandroid:layout_width="match_parent"android:layout_height="wrap_content"android:id="@+id/atv_1"android:hint="自动完成文本编辑框"/><Spinnerandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:id="@+id/sper_1"></Spinner><Buttonandroid:layout_width="wrap_content"android:layout_height="wrap_content"android:text="显示状态栏提示"android:onClick="notification_onclick"/>
</LinearLayout>

package com.example.chenshuai.test321;import android.app.Notification;
import android.app.NotificationManager;
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.AutoCompleteTextView;
import android.widget.Spinner;
import android.widget.Toast;public class Activitywenben extends AppCompatActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_activitywenben);//自动提示文本框AutoCompleteTextView autv_1 = (AutoCompleteTextView)findViewById(R.id.atv_1);//设置数据源
String[] str = {"a","aa","aaa","ab","abc","abcd"};ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.layout.listview_layout,str);autv_1.setAdapter(adapter);//下拉列表Spinner sper_1 = (Spinner)findViewById(R.id.sper_1);sper_1.setAdapter(adapter);sper_1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {@Overridepublic void onItemSelected(AdapterView<?> parent, View view, int position, long id) {Toast.makeText(Activitywenben.this, "position" +position, Toast.LENGTH_SHORT).show();}@Overridepublic void onNothingSelected(AdapterView<?> parent) {Toast.makeText(Activitywenben.this, "什么也不选", Toast.LENGTH_SHORT).show();}});}public void notification_onclick(View view){//1.获取状态栏消息管理器NotificationManager manager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);//
        Notification nt = new Notification.Builder(this).setContentTitle("这是一条消息通知").setContentText("hello world  通知：明天休息").setTicker("显示在状态栏中的信息").setSmallIcon(R.drawable.anniu1).setAutoCancel(true).setDefaults(Notification.DEFAULT_SOUND).build();//交给管理器发出消息manager.notify(0,nt);}
}