How to fix AAPT: error: '???dp' is incompatible with attribute layout

After install of android studio I wanted to create a test app so I added only one button to the default hello world app and run it but I got this error. (after search stackoverflow for similar problem and solution I ask a question......)

AAPT: error: '???dp' is incompatible with attribute layout_marginEnd (attr) dimension.

here is auto generated code by android studio:

 <?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

<TextView
    android:id="@ id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="hello world!"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

<Button
    android:id="@ id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginTop="۳۲dp"
    android:layout_marginEnd="۱۸۰dp"
    android:text="Button"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintTop_toBottomOf="@ id/textView" />
</androidx.constraintlayout.widget.ConstraintLayout>

CodePudding user response：

You have used arabic numerals for android:layout_marginTop="۳۲dp" && android:layout_marginEnd="۱۸۰dp" use english numbering instead like "10dp"

CodePudding user response：

Change this: android:layout_marginTop="۳۲dp" android:layout_marginEnd="۱۸۰dp" to: android:layout_marginTop="5dp" android:layout_marginEnd="5dp"

(inside the Button tag)

CodePudding user response：

Numbers written in a non-English language will probably be corrected by change

 android:layout_marginTop="32dp"
    android:layout_marginEnd="180dp"