Android的工作室：摇篮：错误：找不到符号变量 [英] Android Studio: Gradle: error: cannot find symbol variable

问题描述

我的工作我的应用程序，一切正常，直到我试图在java中显示的图像。

I was working on my app and everything was normal until I tried to display image in java.

我跑的应用程序一次，它跑了正常，被显示的图像。 之后，它要求我输入一些图书馆，我进口他们。从那以后，我得到了错误，我的活动。

I ran the app once and it ran normally, the picture was displayed. After that it asked me to import some libraries and I imported them. After that I got errors for my activities.

这样的错误：

Gradle: error: cannot find symbol variable activity_main
Gradle: error: cannot find symbol variable button1
Gradle: error: cannot find symbol variable button2
Gradle: error: cannot find symbol variable textView
Gradle: error: cannot find symbol variable secondActivity

在MainActivity我已经导入这些库：

In MainActivity I have imported these libraries:

import android.R;
import android.content.Intent;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.widget.Button;

和在secondActivity这些：

and in secondActivity these:

import android.R;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;

有谁知道如何解决这个问题？

Does anyone know how to fix this?

编辑：我删除进口android.R; ，现在，它正常工作

I deleted import android.R; and now it works normally.

推荐答案

您不能导入 android.R 。这应该自动生成和认可。 这个问题包含了很多有用的技巧，如果你得到一些错误引用研究删除在导入后。

You shouldn't be importing android.R. That should be automatically generated and recognized. This question contains a lot of helpful tips if you get some error referring to R after removing the import.

去除进口，经过一些基本的步骤，如果这些错误的出现：

Some basic steps after removing the import, if those errors appear:

• 清洁你的构建，然后重建
• 确保有XML文件中的任何错误或错别字
• 确保您的资源名称由的[A-Z0-9] 。首都或符号是不允许的某些原因。

• Clean your build, then rebuild
• Make sure there are no errors or typos in your XML files
• Make sure your resource names consist of [a-z0-9.]. Capitals or symbols are not allowed for some reason.

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