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);

     }

 }