Copy and paste this java code into the the JustJava app's MainActivity.java file

MainActivity.java

// Add your package below
/* package com.example.android.justjava; */

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;

/**
 * This app displays an order form to order coffee.
 */
public class MainActivity extends AppCompatActivity {

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

    /**
     * This method is called when the order button is clicked.
     */
    public void submitOrder(View view) {
        display(1);
    }

    /**
     * This method displays the given quantity value on the screen.
     */
    private void display(int number) {
        TextView quantityTextView = (TextView) findViewById(R.id.quantity_text_view);
        quantityTextView.setText("" + number);
    }
}

Thanks bro, Resolved already ,‘;’ semicolon was missing. Appreciate your assist

On Thu, Jun 27, 2019 at 4:06 PM Natarior ***@***.***> wrote: Share your last error.I will be happy to help. On Wed, 26 Jun 2019 at 06:42, MohammedOsama717 ***@***.***> wrote: > Thank you *Natarior* After I replace 'import > android.support.v7.app.AppCompatActivity;' in line 4 or 5 with 'import > androidx.appcompat.app.AppCompatActivity' the errors reduced from 6 to 1 > error only. > > — > You are receiving this because you commented. > Reply to this email directly, view it on GitHub > < https://gist.github.com/40d5a3307da03baf1fa37428cec73e5d?email_source=notifications&email_token=AMMP6IFTUHLONUQ3DUZE6OTP4L6VPA5CNFSM4HWRBMS2YY3PNVWWK3TUL52HS4DFVNDWS43UINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQAFUJVC#gistcomment-2954065 >, > or mute the thread > < https://github.com/notifications/unsubscribe-auth/AMMP6IHD7DLGU6GGBUXCIQ3P4L6VPANCNFSM4HWRBMSQ > > . > — You are receiving this because you commented. Reply to this email directly, view it on GitHub <https://gist.github.com/40d5a3307da03baf1fa37428cec73e5d?email_source=notifications&email_token=AMOPYIBDJLKTEHBGD2OBY53P4SUNXA5CNFSM4HWRBMS2YY3PNVWWK3TUL52HS4DFVNDWS43UINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQAFUMRE#gistcomment-2955538>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AMOPYIDMIA56OVC3GWSMDV3P4SUNXANCNFSM4HWRBMSQ> .

-- Regards Mohammed Osama IT Engineer Mobile No. *+**971 52 758 1781* WhatsApp: *+**971 56 178 9919*

@Natarior
thank you! worked by changing it to ->
import androidx.appcompat.app.AppCompatActivity
didn't change anything else

only solution that worked for me

@Natarior
thank you! worked by changing it to ->
import androidx.appcompat.app.AppCompatActivity
didn't change anything else

only solution that worked for me

Yes especially when you are using the latest version of Android Studio

hello friends i think that i have the working code

first the XML code

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginBottom="16dp"
    android:text="Quantity"
    android:textAllCaps="true" />

<TextView
    android:id="@+id/quantity_text_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="0"
    android:textColor="#000000"
    android:textSize="16sp" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="16dp"
    android:text="Order"
    android:textAllCaps="true"
    android:onClick="submitOrder" />

the MainActivity.java code

package com.example.android.justjava;

import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

/**

This app displays an order form to order coffee.
*/
public class MainActivity extends AppCompatActivity {

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

/**

 This method is called when the order button is clicked.
 */
public void submitOrder(View view) {
    display(10);
}
/**

 This method displays the given quantity value on the screen.
 */
private void display(int number) {
    TextView quantityTextView = (TextView) findViewById(
            R.id.quantity_text_view);
    quantityTextView.setText("" + number);
}

}

AndroidManifest.xml code

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme"
    tools:ignore="GoogleAppIndexingWarning">
    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
</application>

it showed work using these firends good luck :)

Thanks @Natarior, I finally run the app the successfully by replacing android.support.v7.app.AppCompatActivity; with import androidx.appcompat.app.AppCompatActivity;

USE THE BELOW FOR activity_main.xml

<TextView
    android:id="@+id/quantity_text_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="0"
    android:textColor="#000000"
    android:textSize="16sp" />

<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="16dp"
    android:text="Order"
    android:textAllCaps="true"
    android:onClick="submitOrder" />

NOW USE THE BELOW FOR MainActivity.java

package com.example.android.justjava.;

import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;

/**

This app displays an order form to order coffee.
*/
public class MainActivity extends AppCompatActivity {

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

/**

 This method is called when the order button is clicked.
 */
public void submitOrder(View view) {
    display(1);
}
/**

 This method displays the given quantity value on the screen.
 */
private void display(int number) {
    TextView quantityTextView = (TextView) findViewById(
            R.id.quantity_text_view);
    quantityTextView.setText("" + number);
}

}

I had the same error. I replaced the line of code, 'import android.support.v7.app.AppCompatActivity;' in line 4 or 5 with 'import androidx.appcompat.app.AppCompatActivity'. All the 6 errors i had eventually vanished including the one about "Cannot resolve v7". i'm still not totally certain that the changes are executable but it is worth a try!!

Thank you Natarior, It worked!

error: cannot find symbol variable quantity_text_view
i have this error please help.

@ashwanisng - two solutions I've seen for the error "error: cannot find symbol variable quantity_text_view" are to:

• clean and rebuild the project
• make sure the package name in the manifest.xml is the same as your package name and not an example package name

You need to give the idea to the relevant text view in XML class. To do that, go in XML class class, find the snippet/code for the "Quantity TextView", add the following android:id = "@+id/quantity_text_view" And Done! Get Outlook for Android<https://aka.ms/ghei36>

…

________________________________ From: Ashwani Singh <notifications@github.com> Sent: Saturday, February 15, 2020 8:03:41 PM To: twhetzel <twhetzel@noreply.github.com> Cc: Shahzad Ansari <shahzadansari03@outlook.com>; Comment <comment@noreply.github.com> Subject: Re: twhetzel/MainActivity.java error: cannot find symbol variable quantity_text_view i have this error please help. — You are receiving this because you commented. Reply to this email directly, view it on GitHub<https://gist.github.com/40d5a3307da03baf1fa37428cec73e5d?email_source=notifications&email_token=AKKN23U56UQC45FUI4LSKRTRC7743A5CNFSM4HWRBMS2YY3PNVWWK3TUL52HS4DFVNDWS43UINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQAGB7AA#gistcomment-3177984>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AKKN23XCZO4BLLECVLI44STRC7743ANCNFSM4HWRBMSQ>.

The problem here is that when you copy the snippet provided by udacity, when you paste it in Android Studio, you have to make some changes, like changing the name of the project, it is probably in Gradle or Build Guild folder which you can find from project files. In there, just change the name of the project, with the name you gave to it while creating the project Get Outlook for Android<https://aka.ms/ghei36>

…

________________________________ From: Trish Whetzel <notifications@github.com> Sent: Saturday, February 15, 2020 8:30:02 PM To: twhetzel <twhetzel@noreply.github.com> Cc: Shahzad Ansari <shahzadansari03@outlook.com>; Comment <comment@noreply.github.com> Subject: Re: twhetzel/MainActivity.java @ashwanisng<https://github.com/ashwanisng> - two solutions I've seen for the error "error: cannot find symbol variable quantity_text_view" are to: * clean and rebuild the project * make sure the package name in the manifest.xml is the same as your package name and not an example package name — You are receiving this because you commented. Reply to this email directly, view it on GitHub<https://gist.github.com/40d5a3307da03baf1fa37428cec73e5d?email_source=notifications&email_token=AKKN23QRM3ASKA256FZUX4TRDAC7VA5CNFSM4HWRBMS2YY3PNVWWK3TUL52HS4DFVNDWS43UINXW23LFNZ2KUY3PNVWWK3TUL5UWJTQAGB7BO#gistcomment-3178007>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AKKN23UG2VECTZBPXVIPY6LRDAC7VANCNFSM4HWRBMSQ>.

I have an ERROR : android.support.v7.app.AppCompatActivity
It says Cannot Resolve V7
ERROR at Line 4

import android.support.v7.app.AppCompatActivity; should be replaced with
import androidx.appcompat.app.AppCompatActivity;

Thanks bro, Resolved already ,‘;’ semicolon was missing.

Appreciate your assist
On Thu, Jun 27, 2019 at 4:06 PM Natarior @.***> wrote:
Share your last error.I will be happy to help.

On Wed, 26 Jun 2019 at 06:42, MohammedOsama717 @.***>
wrote:

Thank you Natarior After I replace 'import
android.support.v7.app.AppCompatActivity;' in line 4 or 5 with 'import
androidx.appcompat.app.AppCompatActivity' the errors reduced from 6 to 1
error only.

—
You are receiving this because you commented.
Reply to this email directly, view it on GitHub
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,
or mute the thread
<
https://github.com/notifications/unsubscribe-auth/AMMP6IHD7DLGU6GGBUXCIQ3P4L6VPANCNFSM4HWRBMSQ

.

—
You are receiving this because you commented.
Reply to this email directly, view it on GitHub
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or mute the thread
https://github.com/notifications/unsubscribe-auth/AMOPYIDMIA56OVC3GWSMDV3P4SUNXANCNFSM4HWRBMSQ
.

--

Regards
Mohammed Osama
IT Engineer

Mobile No. *+*971 52 758 1781
WhatsApp: *+*971 56 178 9919

---

what did you do actually I didn't get you, how did you resolve this!!!!

I had the same error. I replaced the line of code, 'import android.support.v7.app.AppCompatActivity;' in line 4 or 5 with 'import androidx.appcompat.app.AppCompatActivity'. All the 6 errors i had eventually vanished including the one about "Cannot resolve v7". i'm still not totally certain that the changes are executable but it is worth a try!!

Thanks Ikenna it worked like a gem

Hello
I have this problem
Please help, knowing that I have the latest version of Android Studio

The problem seems to be in the layout file, it seems missing. It happens sometimes, simply restart your android studio. If it doesn't go away, check the layout resource file (layout_main.xml) not sure about the name of the file but it would be something like this. Check the ids assigned to the view. Like for example, for the quantity view, it should be text_view_quantity, again id name can vary. Just make sure that your are binding views using correct ids. findViewById(R.id.text_view_quantity) or whatever you named your view in the XML file. I hope it'll work! Sent from Outlook Mobile<https://aka.ms/blhgte>

…

________________________________ From: mohammednamoora <notifications@github.com> Sent: Sunday, May 24, 2020 6:28:59 AM To: twhetzel <twhetzel@noreply.github.com> Cc: Shahzad Ansari <shahzadansari03@outlook.com>; Comment <comment@noreply.github.com> Subject: Re: twhetzel/MainActivity.java @mohammednamoora commented on this gist.

________________________________ Hello I have this problem Please help, knowing that I have the latest version of Android Studio [pro]<https://user-images.githubusercontent.com/65837473/82743661-0ba12280-9d77-11ea-91fd-19408147e5e5.png> — You are receiving this because you commented. Reply to this email directly, view it on GitHub<https://gist.github.com/40d5a3307da03baf1fa37428cec73e5d#gistcomment-3315881>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/AKKN23X3YXQ4S3LGZ2B675DRTBZ5XANCNFSM4HWRBMSQ>.

thank you very much is work thes code 🥇 :-)

package com.example.android.justjava;

import android.os.Bundle;
import android.view.View;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

/**

This app displays an order form to order coffee.
*/
public class MainActivity extends AppCompatActivity {

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

/**

 This method is called when the order button is clicked.
 */
public void submitOrder(View view) {
    display(10);
}
/**

 This method displays the given quantity value on the screen.
 */
private void display(int number) {
    TextView quantityTextView = (TextView) findViewById(
            R.id.quantity_text_view);
    quantityTextView.setText("" + number);
}

}

thank u so so so so much worked for me
just add ur package from AndroidManifest.xml but change from:

package="com.example.justjavabyjava">

it to be like that :

package com.example.justjavabyjava;

then import the class :

and that is it fix the errors to me i hope that to help u out :)

This was what worked for me;

1. under "activity_main.xml"
   Add
   android:id="@+id/quantity_text_view" to TextView 0

2. Ensure that the package name in "AndroidManifestxml" is the same with "MainActivity.java

3. Under MainAcitivity.java, change "import android.support.v7.app.AppCompatActivity;" to
"import android.appcompat.app.AppCompatActivity;"

@udacityandroid PLease update the errors in the Course ,it is too much time consuming ! OR don't mention that this course is free, it is just waste of time !

• If you get an error when copying this code into Android studio, update it to match teh package name found in the project's AndroidManifest.xml file.>>>>Its important step
• then in java >>import android.support.v7.app.AppCompatActivity;<< this import line of code has been updated to another one ,
• so delete this.& drag your mouse to AppCompatActivity text of this line of code. >>public class MainActivity extends ### AppCompatActivity
• now press alt+enter
• and select import.
• the issue will be fixed& error will be gone.
• `/**
• IMPORTANT: Make sure you are using the correct package name.
• This example uses the package name:
• package com.example.android.justjava
• If you get an error when copying this code into Android studio, update it to match teh package name found
• in the project's AndroidManifest.xml file.
  **/

package com.example.justjava;
import android.os.Bundle;
//import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

/**

• This app displays an order form to order coffee.
  */
  public class MainActivity extends AppCompatActivity {

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

  /**

  • This method is called when the order button is clicked.
    */
    public void submitOrder(View view) {
    display(1);
    }

  /**

  • This method displays the given quantity value on the screen.
    */
    private void display(int number) {
    TextView quantityTextView = (TextView) findViewById(R.id.quantity_text_view);
    quantityTextView.setText("" + number);
    }
    }`

more than 7 hours and i cannot solve this errors its really Get me tired

how can i solve them any help

where are they

more than 7 hours and i cannot solve this errors its really Get me tired

I had the same error. I replaced the line of code, 'import android.support.v7.app.AppCompatActivity;' in line 4 or 5 with 'import androidx.appcompat.app.AppCompatActivity'. All the 6 errors i had eventually vanished including the one about "Cannot resolve v7". i'm still not totally certain that the changes are executable but it is worth a try!!

thankyou,
works wor me

This was what worked for me;

1. under "activity_main.xml"
   Add
   android:id="@+id/quantity_text_view" to TextView 0

2. Ensure that the package name in "AndroidManifestxml" is the same with "MainActivity.java

3. Under MainAcitivity.java, change "import android.support.v7.app.AppCompatActivity;" to
"import android.appcompat.app.AppCompatActivity;"

thanksss, works

I tried correcting the code using previous comments but nothing worked for me. please help

I tried correcting the code using previous comments but nothing worked for me. please help

can't resolve activity_main
help