R 1不能被解析 [英] R cannot be resolved

问题描述

package com.ustr.eMIRnew;

import java.util.ArrayList;
import java.util.HashMap;
import android.R;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.SimpleAdapter;

public class eMIRnew extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
    }
}`

这是我的code。但它显示研究解决不了的错误。结果
我试过很多方法，如清洁及建造，封闭和开放的项目，改变了进口android.R 到进口your.package。 name.R 等，但没有任何帮助。任何人可以帮助我，好吗？

This is my code. But it is showing the error R cannot be resolved.
I have tried many methods like clean-and-build, closed-and-open the project, changed import android.R to import your.package.name.R etc. But nothing helped. Can anybody help me, please?

推荐答案

您正在导入android.R包，这是由Android提供的默认之一。
如果您要访问自己的布局，资产的字符串。 。 。然后
删除进口android.R声明。​​

You are Importing android.R package, which is default one provided by Android. If you want to access your own Layout, assets, String. . . then Remove the import android.R statement.

没有必要在建造的。导入您Package.R，默认情况下，会生成R档

No need to import your Package.R, By default, R file is generated during built.

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