Android——AutoCompleteTextView、Spinner和消息提示

layout文件：

 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:paddingBottom="@dimen/activity_vertical_margin"
     android:paddingLeft="@dimen/activity_horizontal_margin"
     android:paddingRight="@dimen/activity_horizontal_margin"
     android:paddingTop="@dimen/activity_vertical_margin"
     tools:context="com.hanqi.testapp2.TestActivity10"
     android:orientation="vertical">

     <AutoCompleteTextView
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:hint="请输入"
         android:id="@+id/at_1"
         android:completionThreshold="1"/>
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content">
         <TextView
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:text="学历："/>
         <Spinner
             android:layout_width="0dp"
             android:layout_weight="1"
             android:layout_height="wrap_content"
             android:id="@+id/sp_1"></Spinner>
     </LinearLayout>
 <Button
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:text="发送状态栏消息"
     android:onClick="bt_onClick"/>
 </LinearLayout>

java类：

 package com.hanqi.testapp2;

 import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.content.Intent;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 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 TestActivity10 extends AppCompatActivity {

     AutoCompleteTextView at_1;
     Spinner sp_1;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_test10);
         at_1 = (AutoCompleteTextView)findViewById(R.id.at_1);
         sp_1 = (Spinner)findViewById(R.id.sp_1);
         //准备数据源
         String[] strings = {"abc","and","bea","car","AFcgy","ctret","Auyn"};
         //准备适配器
         ArrayAdapter<String> arrayAdapter= new ArrayAdapter<String>(this,R.layout.arry_adapter,strings);
         //给组件设置适配器
         at_1.setAdapter(arrayAdapter);

         //下拉列表
         final String[] xl = {"高中","专科","本科","硕士","博士"};
         ArrayAdapter<String> sp = new ArrayAdapter<String>(this,R.layout.arry_adapter,xl);
         sp_1.setAdapter(sp);
         //监听
         sp_1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
             @Override
             public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                 Toast.makeText(TestActivity10.this, "选中的项目是 "+xl[position], Toast.LENGTH_SHORT).show();
             }

             @Override
             public void onNothingSelected(AdapterView<?> parent) {
                 Toast.makeText(TestActivity10.this, "什么也没选", Toast.LENGTH_SHORT).show();
             }
         });
     }
     //发消息
     public void bt_onClick(View v)
     {
         //1.得到状态栏消息管理器
         NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

         //准备PendingIntent
         //1)创建Intent
         Intent intent = new Intent(this,TestActivity1.class);
         //2)生成
         PendingIntent pi = PendingIntent.getActivity(this, 0, intent, 0);
         //2.构建状态栏消息
         Notification nt = new Notification.Builder(this)
                 .setContentTitle("天气预报")
                 .setContentText("明天晴，气温30°")
                 .setSmallIcon(R.drawable.gmail)
                 .setTicker("新的天气预报")
                 .setDefaults(Notification.DEFAULT_SOUND)
                 .setAutoCancel(false)
                 .setContentIntent(pi)
                 .build();
         //3.由管理器发送消息
         nm.notify(0,nt);
     }
 }

效果图为：

点击状态通知栏会跳转到另一个Activity界面

附相关思维导图：