我刚刚下载并安装了新的Android SDK。我想创建一个简单的应用程序来测试它。
向导创建了以下代码:
package eu.mauriziopz.gps;
import android.app.Activity;
import android.os.Bundle;
public class ggps extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}
但是Eclipse给出了错误
R不能被分解
在网上
setContentView(R.layout.main);
Why?
PS:我在res/layout/下有一个名为main.xml的XML文件。
当前回答
我的项目有一个r.java.在开始，R.layout。主要工作好。但是，在添加了一些代码后，它不能工作，错误是r.b ayout.main不能解决。有什么问题吗?
查看您的导入。很有可能这句话是:
import android.R;
会在那里。如果是这种情况，删除它，这样你的项目就不会用默认的Android资源类来解析R，而是用从你的/res/文件夹自动生成的类来解析R。
其他回答
R.java不能自动生成的原因是如果你有这样的目录
res/drawable-hdpi,
res/drawable-mdpi,
res/drawable-ldpi.
image name should be in a proper way
检查映像名称 并检查和布局/any.xml 和string.xml
确定你是否在寻找R.drawable。*该文件存在于可绘制的*文件夹中。
将构建目标从1.5或1.6更改为2.2 (API版本8)，并检查string.xml中是否有%字符。如果是，则替换为%%。
对我来说，这是因为使用了“私人”android drawables:
[2015-11-26 18:59:48 - MyAndroidApp]
/Users/myname/git/MyAndroidApp/res/menu/drawer_view.xml:24:
error: Error: Resource is not public. (at 'icon' with value
'@android:drawable/ic_menu_home').
有趣的是，直到我使用图标删除了对文件的引用，这个错误才出现在控制台中。
android:entries="@menu/drawer_view"
现在解决方案非常明显，将图标复制到我的项目(res/draw - xxxx /)并切换到本地引用。
@drawable/ic_menu_home
希望这能有所帮助。
So I have run into this problem multiple times when switching build targets. Usually doing a Project >> Clean worked for me. This last time, however, it did not. Finally I tried to open my default.properties file, located under the root project folder. I received an error message stating that it was out of sync with the file system. I actually deleted it and copied a coworkers version which allowed eclipse to rebuild my R file. I will paste what it looks like below. It is named 'default.properties'.
# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must be checked in Version Control Systems.
#
# To customize properties used by the Ant build system use,
# "build.properties", and override values to adapt the script to your
# project structure.
# Indicates whether an apk should be generated for each density.
split.density=false
# Project target.
target=android-3
