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>

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);
}
}