Error in XML file. Android programming

Question

I am new to android programming and recently installed Eclipse junos and ADT plugin on my ubuntu system and downloaded the android SDK. After this, i created an android project, which by default is the hello world program, when i run this program i got an error "Error in an XML file: aborting build.". But i haven't edited any code. Please help me solve this problem. Below is the program. I get an error also saying R cannot be resolved to a variable.

package com.example.myandroid;

import android.os.Bundle;

import android.app.Activity;

import android.view.Menu;

public class MainActivity extends Activity {

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}

Here is the activity_main.xml

  <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent" >
    <TextView android:layout_width="wrap_content" 
            android:layout_height="wrap_content"
            android:layout_centerHorizontal="true" 
            android:layout_centerVertical="true" 
            android:text="@string/hello_world" 
            tools:context=".MainActivity" /> 
</RelativeLayout>

<RelativeLayout xmlns:android="schemas.android.com/apk/res/android" xmlns:tools="schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="@string/hello_world" tools:context=".MainActivity" /> </RelativeLayout> — Vinuthan
– Vinuthan, Commented Oct 23, 2012 at 6:58
Could you post it in the question (edit the question)? THat would make it a bit more readable :) — Nanne
– Nanne, Commented Oct 23, 2012 at 6:59
edit (add one extra space in last or first line) MainActivity.java and execute again. — Santhosh
– Santhosh, Commented Oct 23, 2012 at 7:01
To get rid of the "R cannot be resolved to a variable" error try using "import com.example.myandroid.R" — 13hsoj
– 13hsoj, Commented Oct 23, 2012 at 7:31

Sheraz Ahmad Khilji · Accepted Answer · 2012-10-23 07:02:51Z

1

<RelativeLayout xmlns:android="schemas.android.com/apk/res/android"; xmlns:tools="schemas.android.com/tools";

the semicolon above seems to be the problem try and remove them

answered Oct 23, 2012 at 7:02

Sheraz Ahmad Khilji

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2 Comments

Vinuthan Over a year ago

No, that did not help either.

Vinuthan Over a year ago

link My problem is exactly like this. Please help.

13hsoj · Accepted Answer · 2012-10-23 07:34:23Z

0

Try this

    <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent" >
        <TextView android:layout_width="wrap_content" 
                android:layout_height="wrap_content"
                android:layout_centerHorizontal="true" 
                android:layout_centerVertical="true" 
                android:text="@string/hello_world" 
                tools:context=".MainActivity" /> 
    </RelativeLayout>

You have extra semi colons in your xml file.

Also make sure the first line of your xml is

<?xml version="1.0" encoding="utf-8"?>

So your complete xml should look like

    <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent" >
    <TextView android:layout_width="wrap_content" 
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true" 
        android:layout_centerVertical="true" 
        android:text="@string/hello_world" 
        tools:context=".MainActivity" /> 
</RelativeLayout>

edited Oct 23, 2012 at 7:34

answered Oct 23, 2012 at 7:00

13hsoj

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12 Comments

13hsoj Over a year ago

Are you using Eclipse for developement?

13hsoj Over a year ago

There seems to be nothing wrong with your java file, however your updated xml still has the extra semi colons (;) you need to remove those.

Vinuthan Over a year ago

Yes, I am using Eclipse Juno in ubuntu with Open JDK java.

13hsoj Over a year ago

You might want to clear your xml and try and use the code that I have provided. See if that helps.

Vinuthan Over a year ago

I have updated my XML file now. I also used your code. But still get the same error. Is there any other problem.

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