`@layout/activity_main` does not contain a declaration with id `mEtIP`
时间: 2023-10-22 16:05:19 浏览: 80
This error occurs when the ID `mEtIP` is not declared in the layout file `activity_main.xml`. You need to make sure that the ID `mEtIP` is present in the XML file and is spelled correctly.
If the ID is not present, you can add it by opening the layout file and adding the following line of code inside the appropriate layout element:
```
<EditText
android:id="@+id/mEtIP"
... />
```
Make sure to replace `...` with any other attributes you want to set for the `EditText`.
If the ID is present but still causing the error, try cleaning and rebuilding your project before running it again.
相关问题
`@layout/activity_main` does not contain a declaration with id `pwd`
`@layout/activity_main` 是 Android 中的一个布局文件引用,它通常在 Activity 的启动模板中使用,定义了 Activity 的基本视图层次结构。当你看到这样的错误提示 "does not contain a declaration with id 'pwd'",它意味着在 `activity_main.xml` 文件中找不到一个名为 `pwd` 的 ID 定义。
在 XML 布局文件中,`<id>` 是用来为控件(如 `EditText`, `Button`, 等)分配唯一标识符以便在 Java 或 Kotlin 代码中通过 `findViewById()` 方法引用它们。如果你试图在代码中引用 `@+id/pwd` 这个 ID,但是布局文件中并没有这样一个 `id`,那么编译器或运行时就会抛出这样的错误。
相关问题:
1. 如何在 Android 中为布局元素设置 ID?
2. `findViewById()` 方法的作用是什么?
3. 如果 `pwd` 应该存在,但没有在布局文件中声明,可能有哪些原因?
`@layout/activity_main` does not contain a declaration with id `button_1`
根据引用\[2\]和引用\[3\]的内容,问题出现在`@layout/activity_main`文件中没有声明id为`button_1`的组件。在MainActivity.java中通过id寻找checkbox时,由于没有找到对应的id,所以会出现错误提示。要解决这个问题,需要在`@layout/activity_main`文件中添加一个id为`button_1`的组件声明。
#### 引用[.reference_title]
- *1* [在布局文件/layout中加的id,在R文件中却没有显示?](https://blog.csdn.net/dibaifang3806/article/details/102230074)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down1,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* *3* [@layout/activity_main does not contain a declaration with id XXX,findViewById(R.id.XXX)爆红解决方法...](https://blog.csdn.net/LYly_B/article/details/129870811)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insert_down1,239^v3^insert_chatgpt"}} ] [.reference_item]
[ .reference_list ]
相关推荐
![zip](https://img-home.csdnimg.cn/images/20210720083736.png)
![rar](https://img-home.csdnimg.cn/images/20210720083606.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)