android开发分享Android实现弹出列表、单选、多选框

  <?xml version="1.0" encoding="utf-8"?>  <linearlayout xmlns:android="https://schemas.android.com/apk/res/android"   xmlns:app="https://schemas.android.com/apk/res-auto"   xmlns:tools="https://schemas.android.com/tools"   android:layout_width="match_parent"   android:layout_height="match_parent"   tools:context="com.example.lyp1020k.lv.mainactivity"   android:orientation="vertical">      <button   android:id="@+id/button1"   android:text="列表框"   android:onclick="showlist"   android:layout_width="match_parent"   android:layout_height="wrap_content" />      <button   android:id="@+id/button2"   android:text="单选列表"   android:onclick="showsinglealertdialog"   android:layout_width="match_parent"   android:layout_height="wrap_content" />      <button   android:id="@+id/button3"   android:text="多选按钮"   android:onclick="showmutilalertdialog"   android:layout_width="match_parent"   android:layout_height="wrap_content" />     </linearlayout>

  import android.content.dialoginterface;  import android.support.v7.app.alertdialog;  import android.support.v7.app.appcompatactivity;  import android.os.bundle;  import android.view.menu;  import android.view.view;  import android.widget.button;  import android.widget.toast;     public class mainactivity extends appcompatactivity {      private alertdialog alertdialog1; //信息框   private alertdialog alertdialog2; //单选框   private alertdialog alertdialog3; //多选框      private button button1;   private button button2;   private button button3;      @override   protected void oncreate(bundle savedinstancestate) {   super.oncreate(savedinstancestate);   setcontentview(r.layout.activity_main);   init();   }      public void init(){   button1 = (button) findviewbyid(r.id.button1);   button2 = (button) findviewbyid(r.id.button2);   button3 = (button) findviewbyid(r.id.button3);   }      @override   public boolean oncreateoptionsmenu(menu menu) {   getmenuinflater().inflate(r.menu.mian, menu);   return true;   }      public void showlist(view view){   final string[] items = {"列表1", "列表2", "列表3", "列表4"};   alertdialog.builder alertbuilder = new alertdialog.builder(this);   alertbuilder.settitle("这是列表框");   alertbuilder.setitems(items, new dialoginterface.onclicklistener() {    @override    public void onclick(dialoginterface dialoginterface, int i) {    toast.maketext(mainactivity.this, items[i], toast.length_short).show();    alertdialog1.dismiss();    }   });   alertdialog1 = alertbuilder.create();   alertdialog1.show();   }      public void showsinglealertdialog(view view){   final string[] items = {"单选1", "单选2", "单选3", "单选4"};   alertdialog.builder alertbuilder = new alertdialog.builder(this);   alertbuilder.settitle("这是单选框");   alertbuilder.setsinglechoiceitems(items, 0, new dialoginterface.onclicklistener() {    @override    public void onclick(dialoginterface dialoginterface, int i) {    toast.maketext(mainactivity.this, items[i], toast.length_short).show();    }   });      alertbuilder.setpositivebutton("确定", new dialoginterface.onclicklistener() {    @override    public void onclick(dialoginterface dialoginterface, int i) {    alertdialog2.dismiss();    }   });      alertbuilder.setnegativebutton("取消", new dialoginterface.onclicklistener() {    @override    public void onclick(dialoginterface dialoginterface, int i) {    alertdialog2.dismiss();    }   });      alertdialog2 = alertbuilder.create();   alertdialog2.show();   }      public void showmutilalertdialog(view view){   final string[] items = {"多选1", "多选2", "多选3", "多选4"};   alertdialog.builder alertbuilder = new alertdialog.builder(this);   alertbuilder.settitle("这是多选框");   /**    *第一个参数:弹出框的消息集合，一般为字符串集合    * 第二个参数：默认被选中的，布尔类数组    * 第三个参数：勾选事件监听    */   alertbuilder.setmultichoiceitems(items, null, new dialoginterface.onmultichoiceclicklistener() {    @override    public void onclick(dialoginterface dialoginterface, int i, boolean ischecked) {    if (ischecked){     toast.maketext(mainactivity.this, "选择" + items[i], toast.length_short).show();    }else {     toast.maketext(mainactivity.this, "取消选择" + items[i], toast.length_short).show();    }    }   });   alertbuilder.setpositivebutton("确定", new dialoginterface.onclicklistener() {    @override    public void onclick(dialoginterface dialoginterface, int i) {    alertdialog3.dismiss();    }   });      alertbuilder.setnegativebutton("取消", new dialoginterface.onclicklistener() {    @override    public void onclick(dialoginterface dialoginterface, int i) {    alertdialog3.dismiss();    }   });         alertdialog3 = alertbuilder.create();   alertdialog3.show();   }  }