View（视图）——AutoCompleteTextView 、Spinner和消息提示

 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.example.wang.testapp2.TestActivity11"
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 
20     <LinearLayout
21         android:layout_width="match_parent"
22         android:layout_height="wrap_content">
23         <TextView
24             android:layout_width="wrap_content"
25             android:layout_height="wrap_content"
26             android:text="学历："/>
27 
28         <Spinner
29         android:layout_width="0dp"
30         android:layout_weight="1"
31         android:layout_height="wrap_content"
32         android:id="@+id/sp_1"></Spinner>
33     </LinearLayout>
34 
35     <Button
36         android:layout_width="match_parent"
37         android:layout_height="wrap_content"
38         android:text="发送状态栏消息"
39         android:onClick="bt_OnClick"/>
40 </LinearLayout>

 1 package com.example.wang.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 TestActivity11 extends AppCompatActivity {
17 
18     AutoCompleteTextView at_1;
19 
20     Spinner sp_1;
21 
22     @Override
23     protected void onCreate(Bundle savedInstanceState) {
24         super.onCreate(savedInstanceState);
25         setContentView(R.layout.activity_test11);
26 
27         at_1=(AutoCompleteTextView)findViewById(R.id.at_1);
28         sp_1=(Spinner)findViewById(R.id.sp_1);
29 
30         //准备数据源
31         String [] strings={"abc","and","bea","car","abcde","AAAaaa","anddd"};
32 
33         //准备适配器
34         ArrayAdapter<String> aa=new ArrayAdapter<String>(this,R.layout.array_adapter,strings);
35 
36         //给组件设置适配器
37         at_1.setAdapter(aa);
38 
39         //下拉列表
40         final String [] xl={"高中","专科","本科","硕士","博士"};
41 
42         ArrayAdapter<String> sp=new ArrayAdapter<String>(this,R.layout.array_adapter,xl);
43 
44         sp_1.setAdapter(sp);
45 
46         //监听器
47         sp_1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
48             @Override
49             public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
50 
51                 Toast.makeText(TestActivity11.this, "选中的项目是"+xl[position], Toast.LENGTH_SHORT).show();
52             }
53 
54             @Override
55             public void onNothingSelected(AdapterView<?> parent) {
56 
57                 Toast.makeText(TestActivity11.this, "什么也没选", Toast.LENGTH_SHORT).show();
58             }
59         });
60 
61 
62     }
63 
64 
65     //发消息
66     public void bt_OnClick(View v)
67     {
68         //1.得到状态栏消息管理器
69         NotificationManager nm=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);
70 
71         //准备PendingIntent
72         //1)创建Intent
73         Intent intent=new Intent(this,TestActivity1.class);
74 
75         //2)生成
76         PendingIntent pi=PendingIntent.getActivity(this, 0, intent, 0);
77 
78         //2.构建状态栏消息
79          Notification nt=new Notification.Builder(this)
80                  .setContentTitle("天气预报")
81                  .setContentText("明天晴，气温30℃")
82                  .setSmallIcon(R.drawable.tianqi)
83                  .setTicker("新的天气预报")
84                  .setDefaults(Notification.DEFAULT_SOUND)
85                  .setAutoCancel(false)
86                  .setContentIntent(pi)
87                  .build();
88 
89 
90         //3.由管理器发送消息
91         nm.notify(0,nt);
92 
93     }
94 }