Android AlertDialog的几种用法详解

<?xml version="1.0" encoding="utf-8"?>
<linearlayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    tools:context="com.example.lesson7_3_id19_alertdialog.mainactivity">

    <button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="简单的dialog"
        android:onclick="dialog_1"/>
    <button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="列表的dialog"
        android:onclick="dialog_2"/>
    <button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="单选的dialog"
        android:onclick="dialog_3"/>
    <button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="多选的dialog"
        android:onclick="dialog_4"/>
    <button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="自定义view的dialog"
        android:onclick="dialog_5"/>
    <button
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="使用adapter的dialog"
        android:onclick="dialog_6"/>
</linearlayout>

package com.example.lesson7_3_id19_alertdialog;

import android.app.alertdialog;
import android.content.dialoginterface;
import android.os.bundle;
import android.support.v7.app.appcompatactivity;
import android.view.view;
import android.widget.arrayadapter;
import android.widget.edittext;
import android.widget.toast;

public class mainactivity extends appcompatactivity {

    @override
    protected void oncreate(bundle savedinstancestate) {
        super.oncreate(savedinstancestate);
        setcontentview(r.layout.activity_main);
    }
    public void dialog_1(view v){
        alertdialog.builder builder = new alertdialog.builder(this);
        builder.seticon(r.mipmap.ic_launcher_round);

        builder.settitle("标题栏");
        builder.setmessage("正文部分，简单的文本");
        builder.setpositivebutton("确定",new dialoginterface.onclicklistener() {
            @override
            public void onclick(dialoginterface dialog, int which) {
                toast.maketext(mainactivity.this, "点击了确定", toast.length_short).show();
            }
        });
        builder.setnegativebutton("取消",null);
        builder.setneutralbutton("中立",null);
        alertdialog alertdialog = builder.create();
        alertdialog.show();

    }
    private string [] item = {"游戏","运动","电影","旅游","看书"};
    public void dialog_2(view v){
        alertdialog.builder builder = new alertdialog.builder(this);
        builder.settitle("请选择");
        builder.setitems(item, new dialoginterface.onclicklistener() {
            @override
            public void onclick(dialoginterface dialog, int which) {
                toast.maketext(mainactivity.this, "选择了"+item[which], toast.length_short).show();
            }
        });
        // 取消可以不添加
        //builder.setnegativebutton("取消",null);
        alertdialog alertdialog = builder.create();
        alertdialog.show();

    }
    int index;
    public void dialog_3(view v){
        alertdialog.builder builder = new alertdialog.builder(this);
        builder.settitle("请选择");
        builder.setsinglechoiceitems(item, index, new dialoginterface.onclicklistener() {
            @override
            public void onclick(dialoginterface dialog, int which) {
                index = which;
            }
        });
        builder.setpositivebutton("确定", new dialoginterface.onclicklistener() {
            @override
            public void onclick(dialoginterface dialog, int which) {
                toast.maketext(mainactivity.this, "选择了"+item[index], toast.length_short).show();
            }
        });
        builder.setnegativebutton("取消",null);
        alertdialog alertdialog = builder.create();
        alertdialog.show();
    }
    // 设置boolean数组所有的选项设置默认没选
    boolean[] bools = {false,false,false,false,false};
    public void dialog_4(view v){
        alertdialog.builder builder = new alertdialog.builder(this);
        builder.settitle("请选择");
        builder.setmultichoiceitems(item, bools, new dialoginterface.onmultichoiceclicklistener() {
            @override
            public void onclick(dialoginterface dialog, int which, boolean ischecked) {
                bools[which] = ischecked;
            }
        });
        builder.setpositivebutton("确定", new dialoginterface.onclicklistener() {
            @override
            public void onclick(dialoginterface dialog, int which) {
                stringbuffer sb = new stringbuffer();
                for (int i = 0; i < item.length; i++) {
                    if (bools[i]) {
                       sb.append(item[i] + " ");
                    }
                }
                toast.maketext(mainactivity.this, "选择了" + sb.tostring(), toast.length_short).show();
            }
        });
        builder.setnegativebutton("取消",null);
        alertdialog alertdialog = builder.create();
        alertdialog.show();
    }
    public void dialog_5(view v){
        alertdialog.builder builder = new alertdialog.builder(this);
        builder.settitle("连接wifi");
        final edittext et = new edittext(this);
        et.sethint("请输入密码");
        et.setsingleline(true);
        builder.setview(et);
        builder.setnegativebutton("取消",null);
        builder.setpositivebutton("确定", new dialoginterface.onclicklistener() {
            @override
            public void onclick(dialoginterface dialog, int which) {
                string password = et.gettext().tostring();
                if (password.equals("123456")) {
                    toast.maketext(mainactivity.this, "连接成功", toast.length_short).show();
                }else{
                    toast.maketext(mainactivity.this, "密码错误", toast.length_short).show();
                }
            }
        });
        alertdialog alertdialog = builder.create();
        alertdialog.show();

    }
    public void dialog_6(view v){
        arrayadapter<string> adapter = new arrayadapter<string>(this,android.r.layout.simple_list_item_1,item);
        alertdialog.builder builder = new alertdialog.builder(this);
        builder.settitle("使用适配器");
        builder.setadapter(adapter, new dialoginterface.onclicklistener() {
            @override
            public void onclick(dialoginterface dialog, int which) {
                toast.maketext(mainactivity.this, "选择了"+item[which], toast.length_short).show();
            }
        });
        alertdialog alertdialog = builder.create();
        alertdialog.show();
    }
}