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：