i found out that my R.java contains nothing, can someone tell me what to be written in R.java

Question

error is that, R is underlined red! and com.example.guessthenumber.R is also underlined red! when hovered it says to create a class R in package com.example.guessthenumber.R

xml file:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/Guess"
    android:gravity="start"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:text="Done!" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/imageView1"
        android:layout_centerHorizontal="true"
        android:text="Enter your guessed number below"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:textColor="#191970"
        android:textStyle="bold" />

    <EditText
        android:id="@+id/editText1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/textView1"
        android:layout_centerVertical="true"
        android:text="0"
        android:inputType="number" />

    <TextView
        android:id="@+id/textView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignLeft="@+id/button1"
        android:layout_below="@+id/editText1"
        android:layout_marginTop="29dp"
        android:fontFamily="sans-serif-condensed"
        android:text="@string/guess"
        android:textColor="#000000"
        android:textSize="22sp"
        android:textStyle="bold" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_alignParentTop="true"
        android:src="@drawable/game" />

</RelativeLayout>

below one is the java file:

package com.example.guessthenumber;

import android.os.Bundle;
import com.example.guessthenumber.R 
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class MainActivity extends Activity {

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

        final TextView t1 = (TextView) findViewById(R.id.textView1);
        final TextView guessText = (TextView) findViewById(R.id.textView2);
        final EditText userGuess = (EditText) findViewById(R.id.editText1);

        Button b1 = (Button) findViewById(R.id.button1);

        final String[] myNames={"Shashank","Sarthak","Gowda","$hankar"};


        b1.setOnClickListener(new View.OnClickListener() {

            @Override
            public void onClick(View v) {
                String randText="";
                // TODO Auto-generated method stub

                int rando = (int) (Math.random()* 6);
                int userNumber = Integer.parseInt(userGuess.getText().toString());

                if(userNumber == rando){
                    guessText.setText("You got it right!");
                }else{
                    guessText.setText("Guess again! :(");
                }

                randText=Integer.toString(rando);
                t1.setText(randText);   

                userGuess.setText("0");
            }
        });

    }

    @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;
    }

}

You're having an issue in your layout file. Find it, fix it and eventually do a Project -> Clean — gunar, Feb 27 '14 at 17:48
also, check : http://stackoverflow.com/questions/6304608/what-is-android-r-id-text1 — Pararth, Feb 27 '14 at 17:53
@user3351630 if you have errors in any resource files `R.java` is not generated. pls check you resource files and see if there is error and fix it. And if you have `import android.R;` remove it — Raghunandan, Feb 27 '14 at 18:05

score 1 · Answer 1 · edited May 23 '17 at 12:20

1

Replace:
import android.R; by

import com.example.guessthenumber.R

OR

remove import.android.R and use ctrl+shift+O, organise imports if you are using eclipse.

Clean, build your project.

Also, pls read more about R:
Android: What is R? Why is it so Cryptic?

Check your imports - at the top of your activity, below your package name. And make sure it has something like this line:

import your_application_package_name.R;

Agreed with gunar's comment above,

In your xml, the "id" has not been defined properly, for your TextView. Please post the xml code, may be the activity's too.

Correct way for "id" in TextView, xml :

<TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

edited May 23 '17 at 12:20

Community

1
1

answered Feb 27 '14 at 17:48

Pararth

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now i have editted as u said, @+id/textView1 i ll post both xml and java below – user3351630 Feb 27 '14 at 18:02
– user3351630 Feb 27 '14 at 18:06
– user3351630 Feb 27 '14 at 18:06
– user3351630 Feb 27 '14 at 18:07
activity code - the java file code. file which has -> final TextView t1 = (TextView) findViewById(R.id.text1); – Pararth Feb 27 '14 at 18:07
Im getting errors in java file, error is all the id's are being underlined red,when i hover on it, it says change to text1,change to text2,change to text1 respectively – user3351630 Feb 27 '14 at 18:09
setContentView(R.layout.activity_main); final TextView t1 = (TextView) findViewById(R.id.textView1); final TextView guessText = (TextView) findViewById(R.id.textView2); final EditText userGuess = (EditText) findViewById(R.id.editText1); – user3351630 Feb 27 '14 at 18:11
in that setContent activity_main is also underlined red when hovered on it,it says change to 'activity_list_item' – user3351630 Feb 27 '14 at 18:12
post the code by 'edit'ing your question, it'l be better for everybody to read than in comments right? Also, pls check the import line in answer edit – Pararth Feb 27 '14 at 18:14
sure sir, m new to stack overflow, dint knew about this,sorry! – user3351630 Feb 27 '14 at 18:16
i cleaned it, now id's are okay, new error is that, R is underlined red! and com.example.guessthenumber.R is also underlined red! – user3351630 Feb 27 '14 at 18:31
i found out that my R.java contains nothing! – user3351630 Feb 27 '14 at 18:41

score 0 · Answer 2 · answered Feb 27 '14 at 17:49

0

Check that you are importing the R class from your package and not the Android's one. Check also that your resources do not contains error, otherwise the R class will not be generated.

answered Feb 27 '14 at 17:49

Blackbelt

156,034
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Sir, how to do that? – user3351630 Feb 27 '14 at 17:58
i found out that my R.java contains nothing! – user3351630 Feb 27 '14 at 18:43

i found out that my R.java contains nothing, can someone tell me what to be written in R.java

2 Answers2