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给了我一个错误
R无法解决
在线上
setContentView(R.layout.main);
为什么？
PS:我有一个名为res/layout/下main.xml的XML文件.
威尔说的是对的
R is an automatically generated class that holds the constants used to identify your >resources. If you don't have an R.java file (it would be gen/eu.mauriziopz.gps/R.java in >Eclipse with the 1.5 SDK) I would recommend closing and reopening your project or going to >Project > Build all (and selecting "Build Automatically" while there as recommended by >Josef). If that doesn't work than try making a new project, if the problem is recreated than >post here again and we'll go into more detail.
但我发现还有另一个问题导致了第一个问题.SDK目录中的工具没有要执行的权限，因此就好像Eclipse不存在，因此它没有构建R.java文件.
因此，修改权限并 Select "自动构建"解决了问题.