com.example.helloandroid.R.id cannot be resolved

I followed the Hello, Testing tutorial to the letter.

Yet, the following line produces a "com.example.helloandroid.R.id cannot be resolved" error:

  mView = (TextView) mActivity.findViewById(com.example.helloandroid.R.id.textview);

Eclipse amazingly suggests 2 quick fixes:

1. Create field 'id' in type 'R'
2. Create constant 'id' in type 'R'

Can you help me understand what these fix开发者_如何学Ces mean? Are these really the correct fixes? (why didn't the tutorial provide them, too?)

In HelloAndroid project, HelloAndroid.java

 setContentView(R.layout.main);

Check your HelloAndroid project, in "gen->com.example.helloandroid->R.java" have the following code like:

public static final class id {
 public static final int textview=0x7f050000;
}

if no, check "res->layout->main.xml". there is "android:id="@+id/textview" as follows?

<TextView xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/textview"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  android:text="@string/hello"/>

check these items, fix your HelloAndroid.java and/or main.xml if needed. rebuild HelloAndroid project, and rebuild HelloAndroidTest project.

Are these really the correct fixes?

None of them.

What you have to do is importing the correct R class. Sometimes eclipse help you with that when you press Ctrl+Shift+O.

I am not an expert. But I can tell you that this problem also happened to me. Thanks to the comments above, I figured out that between the time I worked the Hello World tutorial and the time that I tried the Hello World Testing tutorial, I had tried the Linear Layout tutorial in the "Hello, Views" section. Following the Linear Layout tutorial, I changed main.xml.

I restored main.xml to the way in which the Hello World tutorial expected it and that solved the missing "id" problem.

Bit of a noob myself but recently came across this (or a similar) problem. You shouldn't have to import your R class because you give it an fully-qualified package name (com.yourpackage.R...) in the findviewById and the R class is public. However, if like me you had put both your project and your test project in the same package you are probably referencing your test R class not your project's R class.

Changing my test manifest to be com.mypackage.test instead of com.mypackage (and moving any subsequent misplaced classes to the new com.mypackage.test) fixed the problem (you may have to delete your test R class for it to be regenerated)

I had this problem as well while following the Android training for creating tests. None of the above solutions worked - a R.java class was continuously created within the MyFirstAppTest project, and this is the R class that was picked up in the MainActivityTest class. The only way that I could resolve it was to import the R class from the project under test (in my MainActivityTest.java file):

import com.example.myfirstapp.R;

Then the correct R class was picked up along with its id method.