Android——AutoCompleteTextView、Spinner和消息提示

layout文件：

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     xmlns:tools="http://schemas.android.com/tools"
 4     android:layout_width="match_parent"
 5     android:layout_height="match_parent"
 6     android:paddingBottom="@dimen/activity_vertical_margin"
 7     android:paddingLeft="@dimen/activity_horizontal_margin"
 8     android:paddingRight="@dimen/activity_horizontal_margin"
 9     android:paddingTop="@dimen/activity_vertical_margin"
10     tools:context="com.hanqi.testapp2.TestActivity10"
11     android:orientation="vertical">
12
13     <AutoCompleteTextView
14         android:layout_width="match_parent"
15         android:layout_height="wrap_content"
16         android:hint="请输入"
17         android:id="@+id/at_1"
18         android:completionThreshold="1"/>
19     <LinearLayout
20         android:layout_width="match_parent"
21         android:layout_height="wrap_content">
22         <TextView
23             android:layout_width="wrap_content"
24             android:layout_height="wrap_content"
25             android:text="学历："/>
26         <Spinner
27             android:layout_width="0dp"
28             android:layout_weight="1"
29             android:layout_height="wrap_content"
30             android:id="@+id/sp_1"></Spinner>
31     </LinearLayout>
32 <Button
33     android:layout_width="match_parent"
34     android:layout_height="wrap_content"
35     android:text="发送状态栏消息"
36     android:onClick="bt_onClick"/>
37 </LinearLayout>

java类：

 1 package com.hanqi.testapp2;
 2
 3 import android.app.Notification;
 4 import android.app.NotificationManager;
 5 import android.app.PendingIntent;
 6 import android.content.Intent;
 7 import android.support.v7.app.AppCompatActivity;
 8 import android.os.Bundle;
 9 import android.view.View;
10 import android.widget.AdapterView;
11 import android.widget.ArrayAdapter;
12 import android.widget.AutoCompleteTextView;
13 import android.widget.Spinner;
14 import android.widget.Toast;
15
16 public class TestActivity10 extends AppCompatActivity {
17
18     AutoCompleteTextView at_1;
19     Spinner sp_1;
20     @Override
21     protected void onCreate(Bundle savedInstanceState) {
22         super.onCreate(savedInstanceState);
23         setContentView(R.layout.activity_test10);
24         at_1 = (AutoCompleteTextView)findViewById(R.id.at_1);
25         sp_1 = (Spinner)findViewById(R.id.sp_1);
26         //准备数据源
27         String[] strings = {"abc","and","bea","car","AFcgy","ctret","Auyn"};
28         //准备适配器
29         ArrayAdapter<String> arrayAdapter= new ArrayAdapter<String>(this,R.layout.arry_adapter,strings);
30         //给组件设置适配器
31         at_1.setAdapter(arrayAdapter);
32
33         //下拉列表
34         final String[] xl = {"高中","专科","本科","硕士","博士"};
35         ArrayAdapter<String> sp = new ArrayAdapter<String>(this,R.layout.arry_adapter,xl);
36         sp_1.setAdapter(sp);
37         //监听
38         sp_1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
39             @Override
40             public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
41                 Toast.makeText(TestActivity10.this, "选中的项目是 "+xl[position], Toast.LENGTH_SHORT).show();
42             }
43
44             @Override
45             public void onNothingSelected(AdapterView<?> parent) {
46                 Toast.makeText(TestActivity10.this, "什么也没选", Toast.LENGTH_SHORT).show();
47             }
48         });
49     }
50     //发消息
51     public void bt_onClick(View v)
52     {
53         //1.得到状态栏消息管理器
54         NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
55
56         //准备PendingIntent
57         //1)创建Intent
58         Intent intent = new Intent(this,TestActivity1.class);
59         //2)生成
60         PendingIntent pi = PendingIntent.getActivity(this, 0, intent, 0);
61         //2.构建状态栏消息
62         Notification nt = new Notification.Builder(this)
63                 .setContentTitle("天气预报")
64                 .setContentText("明天晴，气温30°")
65                 .setSmallIcon(R.drawable.gmail)
66                 .setTicker("新的天气预报")
67                 .setDefaults(Notification.DEFAULT_SOUND)
68                 .setAutoCancel(false)
69                 .setContentIntent(pi)
70                 .build();
71         //3.由管理器发送消息
72         nm.notify(0,nt);
73     }
74 }

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：