CODEWITHSUNDEEP
androideclipselayoutandroid-activity
Peri Hartman
Peri Hartman

Reputation: 19474

android R cannot be resolved but layout has no errors

I'm a newbie with Android dev. I have a simple "learning" app with a very simple layout. The layout shows only one warning (hardcoded string ... should should use @string resource) which I doubt is related to the problem. Yet, in my activity code, I have the error "R cannot be resolved to a variable".

Here's the java:

package com.example.treefields;

import android.app.Activity;
import android.os.Bundle;

public class TreeFieldsActivity extends Activity
{
  public void onCreate (Bundle savedInstanceState)
  {
    super.onCreate(savedInstanceState);
    setContextView (R.layout.activity_tree_fields);
  }
}

And, here's the layout:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <EditText
        android:id="@+id/editText1"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:ems="10"
        android:inputType="textMultiLine"
        android:text="multiline text" />

</LinearLayout>

Any ideas? Thanks.

Upvotes: 0

Views: 857

Answers (2)

AlcoJaguar
AlcoJaguar

Reputation: 431

If you're using Eclipse, you can always use Ctrl+Shift+o to let the IDE figure out what to import, but like Bostwickenator said, you should make sure you include the R generated by your package, and not android.R on accident (as that would not resolve to any layout elements you created, but rather some Android common stuff).

Upvotes: 1

Bostwickenator
Bostwickenator

Reputation: 380

It doesn't look like you are even including R. You need to include the resources package as such:

import your.package.name.R;

The lint string warning is likely unrelated as you say.

Upvotes: 2

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