为什么我的布局不能得到解决？ （Android版/ JAVA） [英] Why is my layout unable to be resolved? (Android/Java)

问题描述

好了，我的计划一直工作至今，住编译和一切，我尝试将声音添加到它，所以我创建了一个文件夹原始，并停留在MP3文件。然后我试图使用它，一切都开始变得错误无论出于何种原因。我按Ctrl + Z'd直到它回来之前我尝试添加的声音。该方案还error'd。我删除原始文件夹，还是有错误[标志着下面的程序注意，这仅仅是1类是从我的程序，还有其他的。

Well, my program has been working so far, staying compilable and everything, and I tried to add a sound to it, so I created a folder "raw", and stuck in the mp3 file. Then I tried to use it, and everything started getting errors for whatever reason. I Ctrl+Z'd until it was back to before I tried adding sound. The program still error'd. I deleted the raw folder and there's still errors[marked in the program below] Note that this is only 1 class from my program, there are others.

package scouting.form;

import android.R;//Don't use android.R here; use a fully qualified name for each usage instead - this one only comes up *sometimes...*
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

public class Login extends Activity {

    Button login;
    EditText user;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_login);//Error: activity_login cannot be resolved or is not a field
        login=(Button) findViewById(R.id.button1);//NO ERROR even though the next line has an error...
        user=(EditText) findViewById(R.id.editText1);//Error: editText1 cannot be resolved or is not a field
        login.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                Intent openScouting = new Intent("com.cody.graham.SCOUTING");
                startActivity(openScouting);
            }
        });
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_login, menu);//Error: activity_login cannot be resolved or is not a field
        return true;
    }
}

我知道的布局和菜单仍然存在，他们一直在那里的全部时间，我可以打开布局和确认，仍然有布局activity_login，这是在布局文件夹中的编辑文本框和编辑文本框确实有行

I know that the layouts and menus are still there, they have been there the whole time, I can open the layouts and confirm that there is still an Edit Text box in the layout "activity_login" which is in the layout folder and the edit text box does have the line

android:id="@+id/editText1"

在里面。

推荐答案

在上面看到了吗？

import android.R;//Don't use android.R here; use a fully qualified name for each usage instead - this one only comes up *sometimes...

您也许应该小心，评论怎么说。 ;）删除了 android.R 进口，它会使用你的项目的研究文件来代替，这是在 activity_login 是

You should probably heed what that comment says. ;) Remove the import for android.R, and it will use your project's R file instead, which is where activity_login is.

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