CODEWITHSUNDEEP
android
kramer65
kramer65

Reputation: 54033

First Android app: R cannot be resolved to a variable?

From the [Android Getting Started][1] tutorial I'm trying to build my first app. This however, is quite a process. I was at the point "Add the Actions to the Action Bar" on [this page][2] when I encountered the error *main_activity_actions cannot be resolved or is not a field* for this line:

inflater.inflate(R.menu.main_activity_actions, menu);

So I found a similar post here on SO, which suggests to remove import android.R; and then do Project -> Clean and rebuild. Since I didn't have the import android.R; in it I simply tried to add it, do a Clean and rebuild, but this leaves me with even more errors. So I removed the import android.R; again and did a Clean and Rebuild again, but now it still gives me all those new errors, saying: R cannot be resolved to a variable for the following lines (these lines do not appear close to eachother, but throughout the file):

setContentView(R.layout.activity_main);
inflater.inflate(R.menu.main_activity_actions, menu);
EditText editText = (EditText) findViewById(R.id.edit_message);

For reference, the total file is here on pastebin.

Can anybody please help me out here? What am I doing wrong and how can I solve this?

[EDIT] Below the code in my res/menu/main_activity_actions.xml. If you need to see any more code let me know!

<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <!--  Search, should appear as action button -->
    <item android:id="@+id/action_search"
        android:icon="@drawable/ic_action_search"
        android:title="@string/action_search"
        android:showAsAction="ifRoom" />

    <!-- Settings, should always be in the overflow -->
    <item android:id="@+id/action_settings"
        android:title="@string/action_settings"
        android:showAsAction="never" />

    <!-- Add some other thing, just cuz I can.. -->
    <item android:id="@+id/action_something_else"
        android:title="@string/action_something_else"
        android:showAsAction="never" />

</menu>

Upvotes: 3

Views: 6898

Answers (8)

GrayOwl
GrayOwl

Reputation: 1

I also had this problem, in my case the name of the xml file was main.xml not main_activity_actions. Changing it from inflater.inflate(R.menu.main_activity_actions, menu); to inflater.inflate(R.menu.main, menu); fixed the problem.

Upvotes: 0

Erin
Erin

Reputation: 5835

If anyone is still having trouble on this, make sure that the XML file main_activity_actions.xml is in /res/menu/ and NOT in /res/layout

Upvotes: 1

user3150706
user3150706

Reputation: 1

Also, make sure you put the action_search and action_settings into values/strings.xml, in case they aren't there already. 

<resources>

    <string name="app_name">MyApp</string>
    <string name="action_settings">Settings</string>
    <string name="action_search">Search</string>
    <string name="edit_message">Enter a message</string>
    <string name="button_send">Send</string>
    <string name="title_activity_display_message">My Message</string>
    <string name="hello_world">Hello world!</string>

</resources>

I had the same problem, and I had stupidly not checked to see if action_search was defined. Also, the png referenced in the "android:icon" was missing from the "drawables" folder.

Upvotes: 0

user2917006
user2917006

Reputation: 1

Replace "R.menu" to be "R.layout" as below->>

inflater.inflate(R.layout.main_activity_actions, menu);

Upvotes: 0

Malik
Malik

Reputation: 35

In 

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
}

give your main activity xml file name in setContentView(R.layout.your_activity_main);

Upvotes: 1

playmaker420
playmaker420

Reputation: 1537

Check your xml or check the res folder folder if there any problem with the image's name . Or check Window/showview/Errorlog

Upvotes: 1

Abdul Mohsin
Abdul Mohsin

Reputation: 1435

Check your all XML files inside res folder. You may having some error in one of your XML files

Upvotes: 0

user1509803
user1509803

Reputation: 196

Remove the import R file, then try Clean the project, then rebuild, should work.

Upvotes: 2

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