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
我认为问题出在layout.xml文件或import语句中。
请确保您没有导入R.android。，而不是导入R.YOUR PACKAGE NAME..
它会工作得很好。
其他回答
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
这可能是由于手动重命名AndroidManifest.xml中的包而导致的问题
另一种选择是使用内置工具重命名包，这将照顾到大多数问题，避免R not found问题。
Right Click on the project
Click on Android Tools
Click on Rename Application Project
Enter the new package name
然后将出现一个弹出窗口，要求应用更改，包括R工作区。
在android中重命名包名
一些答案建议重新启动计算机。我发现重启adb服务器就足够了——如果你刚刚更新了Android SDK，这一点尤其正确。
通过linux shell重启adb:
$ cd $ANDROID_SDK/platform-tools
$ ./adb kill-server
$ ./adb start-server
您可能需要重新启动Eclipse，以便重新连接到重新启动的adb服务器。如果Eclipse没有自动编译项目，您可能需要执行一个clean/build。
值得在AndroidManifest.xml中检查一下。属性包的值正确。
那就是:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="your.correct.package.name"
...
更改后，将重新生成R.java。
只需进入Android Top菜单列表。点击构建菜单，在构建下点击重建项目。
