自动完成文本输入框提示，下拉列表，发送状态栏消息,消息提醒

activity_zidongwancheng.xml

<?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.example.lenovo.textapp4.ZidongwanchengActivity"
    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="280dp">
        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="学历:"/>

    <Spinner
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:id="@+id/sp_1"
        android:layout_weight="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_on"/>
</LinearLayout>

1-

package com.example.lenovo.textapp4;

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 ZidongwanchengActivity extends AppCompatActivity {

    AutoCompleteTextView at_1;
    Spinner sp_1;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_zidongwancheng);

        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","Aaf","dsf","sdf","gdg"};
        //准备适配器
        ArrayAdapter<String> arrayAdapter = new ArrayAdapter<String>(this,R.layout.array_adapter,strings);
        //给组件设置适配器
        at_1.setAdapter(arrayAdapter);

2-

  //下拉列表
        final String[] xl={"高中","专科","本科","研究生","博士生"};
        ArrayAdapter<String>arrayAdapter1=new ArrayAdapter<String>(this,R.layout.array_adapter,xl);
        sp_1.setAdapter(arrayAdapter1);
        //监听器
        sp_1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

                Toast.makeText(ZidongwanchengActivity.this, "选中的项目是"+xl[position], Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {

                Toast.makeText(ZidongwanchengActivity.this, "没选", Toast.LENGTH_SHORT).show();
            }
        });

    }

3-

//发送状态栏消息
    public void bt_on(View v)
    {
        //1-得到状态栏消息管理器
        NotificationManager nm=(NotificationManager)getSystemService(NOTIFICATION_SERVICE);
        //准备一个PendingIntent
        //1)创建一个普通的Intent
        Intent intent=new Intent(this,Text1Activity.class);

        //2)生成PendingIntent
        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°~60°，没风，干燥")
                .setSmallIcon(R.drawable.nnn)
                .setTicker("新的天气预报")
                .setDefaults(Notification.DEFAULT_SOUND)
                .setAutoCancel(true)
                .setContentIntent(pi)
                .build();
        //3-由管理器发送消息
        nm.notify(0,nt);
    }