Android——适配器其他组件（AutoCompleteTextView：自动完成文本编辑框；Spinner:下拉列表）

activity_activitywenben.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    >

    <AutoCompleteTextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/atv_1"
        android:hint="自动完成文本编辑框"/>

    <Spinner
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/sper_1">
    </Spinner>

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="显示状态栏提示"
        android:onClick="notification_onclick"/>
</LinearLayout>

java

package com.example.chenshuai.test321;

import android.app.Notification;
import android.app.NotificationManager;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
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 Activitywenben extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_activitywenben);

        //自动提示文本框
        AutoCompleteTextView autv_1 = (AutoCompleteTextView)findViewById(R.id.atv_1);

        //设置数据源

        String[] str = {"a","aa","aaa","ab","abc","abcd"};

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,R.layout.listview_layout,str);

        autv_1.setAdapter(adapter);

        //下拉列表
        Spinner sper_1 = (Spinner)findViewById(R.id.sper_1);

        sper_1.setAdapter(adapter);

        sper_1.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {

                Toast.makeText(Activitywenben.this, "position" +position, Toast.LENGTH_SHORT).show();
            }

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

                Toast.makeText(Activitywenben.this, "什么也不选", Toast.LENGTH_SHORT).show();

            }
        });
    }

    public void notification_onclick(View view){

        //1.获取状态栏消息管理器
        NotificationManager manager = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);

        //
        Notification nt = new Notification.Builder(this)

                .setContentTitle("这是一条消息通知")
                .setContentText("hello world  通知：明天休息")
                .setTicker("显示在状态栏中的信息")
                .setSmallIcon(R.drawable.anniu1)
                .setAutoCancel(true)
                .setDefaults(Notification.DEFAULT_SOUND)
                .build();

        //交给管理器发出消息
        manager.notify(0,nt);
    }
}