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I have installed eclipse and followed steps by installing the install new software and setting up sdk as well. but error in MainActivity.java is "R cannot be resolved to a variable". Please help me on this.

following is the code

package com.home.begingwithandroid;

import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.view.Menu;
import android.view.MenuItem;


public class MainActivity extends ActionBarActivity {

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


@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}

thanks

XML code is 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/hellp"/>

    <TextView 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/This is my first Android Application"/>

    <Button 
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="@string/And this is clickable button!"/>

</LinearLayout>
user3440868
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1 Answers1

0

the problem is in your xml file

<TextView 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hellp"/>

<TextView 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/This is my first Android Application"/>

<Button 
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/And this is clickable button!"/>

when using @string/This is my first Android Application it means you have a string named This is my first Android Application in your strings file. if you want to show that text exactly, just remove @string from it.

Mohammad Rahchamani
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  • After importing. A new error is discovered The import com.home.begingwithandroid.R cannot be resolved Please help? – user3440868 Nov 18 '14 at 04:36
  • then you have an error in your `xml` files. check error log to find problem. – Mohammad Rahchamani Nov 18 '14 at 07:17
  • Actually I am writing this xml file from a book. I have matched this xml code with the one in the book. But found no errors. I have updated question with this xml code as well. Please do let me know if there is some error. Thanks – user3440868 Nov 18 '14 at 07:37
  • Well, when I try to run the project it says: Your project contains error(s) : please fix them before running the project. And there is no error in xml but R is not resolved at all. – user3440868 Nov 18 '14 at 08:22
  • Changed the xml code. But still says can not resolve R. – user3440868 Nov 18 '14 at 09:59