Android 对话框组件 AlertDialog 四种常用方法

Myth丶恋晨 2023-10-06 10:43 43阅读 0赞

**本文原创首发CSDN，链接 https://blog.csdn.net/qq\_41464123/article/details/106618845 ，作者博客https://blog.csdn.net/qq\_41464123 ，转载请带上本段文字，尤其是脚本之家、码神岛等平台，谢谢配合。**

--------------------

**目录**

一、什么是AlertDialog对话框 ？

二、如何使用？

1.显示带确定、取消按钮的对话框

2. 显示带列表的对话框

3. 显示带单选列表项的对话框

4. 显示带多选列表项的对话框

三、总结

--------------------

## 一、什么是AlertDialog对话框 ？ ##

> 在Android中，AlertDialog可以为当前的界面上显示一个对话框，而且产生的对话框是在所有界面元素上面的，能够覆盖掉其余组件，所以AlertDialog一般是用于提示一些非常重要的信息或者警告内容。

## 二、如何使用？ ##

**AlertDialog的功能十分强大，它不仅可以生成带按钮的提示对话框，还可以生成带列表的列表对话框。**

**对话框区域通常被分为四个区域，分别是图标区、标题区、内容区、按钮区域。**

#### 1.显示带确定、取消按钮的对话框 ####

**效果图：**

![20200608143928836.png][]

**单击按钮后：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNDY0MTIz_size_16_color_FFFFFF_t_70][]

**对话框隐藏，提示单击信息。**

![2020060814440760.png][]

**实现方法，在XML文件中新建一个按钮，在Java文件中添加单击事件响应**

button1.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();
            alertDialog.setIcon(R.mipmap.advise);
            alertDialog.setTitle("标题");
            alertDialog.setMessage("具体文本");
    
            alertDialog.setButton(DialogInterface.BUTTON_NEGATIVE, "否", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    Toast.makeText(MainActivity.this, "您单击了否按钮", Toast.LENGTH_SHORT).show();
                }
            });
    
            alertDialog.setButton(DialogInterface.BUTTON_POSITIVE, "是", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    Toast.makeText(MainActivity.this, "您单击了是按钮 ", Toast.LENGTH_SHORT).show();
                }
            });
            alertDialog.show();
        }
    });

--------------------

#### 2. 显示带列表的对话框 ####

**效果展示：**

![20200608144450451.png][]

**单击按钮后：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNDY0MTIz_size_16_color_FFFFFF_t_70 1][]

**对话框隐藏，提示单击信息。**

![20200608144508505.png][]

button2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
    
            final String[] items = new String[]{"选项1", "选项2", "选项3","选项4"};
    
            AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
            builder.setIcon(R.mipmap.advise1);
            builder.setTitle("请选择选项：");
    
            builder.setItems(items, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    Toast.makeText(MainActivity.this,
                            "您选择了" + items[which], Toast.LENGTH_SHORT).show();
                }
            });
            builder.create().show();
        }
    });

--------------------

#### 3. 显示带单选列表项的对话框 ####

**效果展示：**

![20200608144722785.png][]

**单击后：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNDY0MTIz_size_16_color_FFFFFF_t_70 2][]

Java逻辑代码部分：

button3.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
    
            final String[] items = new String[]{"扎克伯格", "乔布斯", "拉里.埃里森", "安迪.鲁宾", "马云"};
    
            AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
            builder.setIcon(R.mipmap.advise2);
            builder.setTitle("如果让你选择，你最想做哪一个：");
            builder.setSingleChoiceItems(items, 0, new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    Toast.makeText(MainActivity.this,
                            "您选择了" + items[which], Toast.LENGTH_SHORT).show();
                }
            });
            builder.setPositiveButton("确定", null);
            builder.create().show();
        }
    });

--------------------

#### 4. 显示带多选列表项的对话框 ####

**效果展示：**

![20200608144851690.png][]

**单击后：**

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNDY0MTIz_size_16_color_FFFFFF_t_70 3][]

**点击确定后，显示：**

![20200608145127140.png][]

**Java逻辑代码：**

button4.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            checkedItems = new boolean[]{false, true, false, true, false};
            //各列表项要显示的内容
            items = new String[]{"开心消消乐", "球球大作战", "欢乐斗地主", "梦幻西游", "超级玛丽"};
    
            AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
            builder.setIcon(R.mipmap.advise2);
            builder.setTitle("请选择您喜爱的游戏：");
            builder.setMultiChoiceItems(items, checkedItems, new DialogInterface.OnMultiChoiceClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which, boolean isChecked) {
                    checkedItems[which] = isChecked;
    
                }
            });
    
            builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
                @Override
                public void onClick(DialogInterface dialog, int which) {
                    String result = "";
                    for (int i = 0; i < checkedItems.length; i++) {
                        if (checkedItems[i]) {
                            result += items[i] + "、";
                        }
                    }
                    if (!"".equals(result)) {
                        result = result.substring(0, result.length() - 1);
                        Toast.makeText(MainActivity.this,
                                "您选择了[ " + result + " ]", Toast.LENGTH_LONG).show();
                    }
                }
            });
            builder.create().show();
        }
    });

--------------------

## 三、总结 ##

**在Android中，如果需要使用 对话框 组件，来实现一定的功能，就需要用到 AlertDialog 。**

**本文主要总结了 AlertDialog 的四种常用方法，以便后续不时之需。**

[20200608143928836.png]: https://img-blog.csdnimg.cn/20200608143928836.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNDY0MTIz_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/2020060814393970.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNDY0MTIz,size_16,color_FFFFFF,t_70
[2020060814440760.png]: https://img-blog.csdnimg.cn/2020060814440760.png
[20200608144450451.png]: https://img-blog.csdnimg.cn/20200608144450451.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNDY0MTIz_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200608144459734.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNDY0MTIz,size_16,color_FFFFFF,t_70
[20200608144508505.png]: https://img-blog.csdnimg.cn/20200608144508505.png
[20200608144722785.png]: https://img-blog.csdnimg.cn/20200608144722785.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNDY0MTIz_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200608144749523.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNDY0MTIz,size_16,color_FFFFFF,t_70
[20200608144851690.png]: https://img-blog.csdnimg.cn/20200608144851690.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNDY0MTIz_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20200608145116413.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxNDY0MTIz,size_16,color_FFFFFF,t_70
[20200608145127140.png]: https://img-blog.csdnimg.cn/20200608145127140.png