Hello, this is a great library. It can attach image to each element in the wheel. But, how to add text to each item like +2 coins or something like that? And how to stop it like call the stop() function? Thanks in advance.

There are no samples for the wheel, and it's not clear how the wheel is meant to work or be used from the existing documentation. It would be helpful to add a section to the documentation that gives an overview of what the LuckyWheel does and how it can be used.

I'm trying to add the LuckyWheel dependency to my project (I've tried version 0.3.0 too), and I get the following error:

> Could not find com.github.mmoamenn:LuckyWheel_Android:0.1.2. Searched in the following locations: - https://dl.google.com/dl/android/maven2/com/github/mmoamenn/LuckyWheel_Android/0.1.2/LuckyWheel_Android-0.1.2.pom - https://repo.maven.apache.org/maven2/com/github/mmoamenn/LuckyWheel_Android/0.1.2/LuckyWheel_Android-0.1.2.pom Required by: project :app

Has the package been removed from the repos? Thanks!

Hey im a beginner on java, android studio. i would really like to know how to use the string function.
It shows me only Bitmap

I don't want to add an Image or bitmap in Wheel. So what is the solution for this?

is it possible to get index of selected section

If i want to show only color on wheel. I don't want to put image or text on it. How i do this.

Can I contact with you whattsapp or telegram please

This is my piece of code for adding items to the lucky wheel :
val b = ArrayList<WheelItem>() val bitmap = BitmapFactory.decodeResource(resources, R.drawable.circle) b.add((WheelItem(Color.parseColor("#FFFFFF"), bitmap, "Test"))) b.add((WheelItem(Color.parseColor("#FFFFFF"), bitmap, "Test"))) luckyWheel.addWheelItems(b)

This is the error I'm getting :

java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference
at com.bluehomestudio.luckywheel.WheelView.drawImage(WheelView.java:133)
at com.bluehomestudio.luckywheel.WheelView.onDraw(WheelView.java:245)
at android.view.View.draw(View.java:23194)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at android.widget.ScrollView.draw(ScrollView.java:1869)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at androidx.recyclerview.widget.RecyclerView.drawChild(RecyclerView.java:5030)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at androidx.recyclerview.widget.RecyclerView.draw(RecyclerView.java:4429)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at androidx.constraintlayout.widget.ConstraintLayout.dispatchDraw(ConstraintLayout.java:1994)
at android.view.View.draw(View.java:23197)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
E/AndroidRuntime: at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.View.draw(View.java:22925)
at android.view.ViewGroup.drawChild(ViewGroup.java:4529)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4290)
at android.view.View.draw(View.java:23197)
at com.android.internal.policy.DecorView.draw(DecorView.java:821)
at android.view.View.updateDisplayListIfDirty(View.java:22061)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:689)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:695)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:793)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:4670)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:4381)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:3600)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:2328)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:9087)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1231)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1239)
at android.view.Choreographer.doCallbacks(Choreographer.java:899)
at android.view.Choreographer.doFrame(Choreographer.java:832)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1214)
at android.os.Handler.handleCallback(Handler.java:942)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loopOnce(Looper.java:201)
at android.os.Looper.loop(Looper.java:288)
at android.app.ActivityThread.main(ActivityThread.java:7872)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:548)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:936)

    I think you forgot to do a null check before trying to draw the bitmap

How to use on touch?

please add more text properties like color, size to customize text in wheel

below pull request seems to have fixes to change text size if it can be reviewed and merged please
#27

How can I rotate the wheel auto ?

how to drawBitmap from server side url

I want to set Multi line text according to width of each triangle. how is it possible? Please help me for same

Hi,

Good day! hope you are doing well at this moment. Just so you know I am new to android development.

I'm not really sure of this is an issue or I am just missing something on my code. Would you mind taking a look of this?

Here is my MainActivity:

package com.example.foodpicker

import androidx.appcompat.app.AppCompatActivity
import android.os.Bundle

class MainActivity : AppCompatActivity() {

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    supportFragmentManager.beginTransaction()
        .replace(R.id.mainViewFragment, SpinnerFragment())
        .commit()
}

}

activity_main.xml

<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">

<FrameLayout
    android:id="@+id/mainViewFragment"
    android:layout_width="326dp"
    android:layout_height="458dp"
    app:layout_constraintBottom_toTopOf="@+id/button"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toTopOf="parent" />

<Button
    android:id="@+id/button"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="@string/spin"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.5"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/mainViewFragment" />

</androidx.constraintlayout.widget.ConstraintLayout>

SpinnerFragment
package com.example.foodpicker

import android.graphics.BitmapFactory
import android.graphics.Color
import android.os.Bundle
import androidx.fragment.app.Fragment
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import com.bluehomestudio.luckywheel.LuckyWheel
import com.bluehomestudio.luckywheel.WheelItem

import kotlinx.android.synthetic.main.fragment_spinner.*

/**

• A simple [Fragment] subclass.
  */
  class SpinnerFragment : Fragment() {

  override fun onCreateView(
  inflater: LayoutInflater, container: ViewGroup?,
  savedInstanceState: Bundle?
  ): View {
  // Inflate the layout for this fragment
  return inflater.inflate(R.layout.fragment_spinner, container, false)

   val luckyWheel : LuckyWheel = lwv
  
   val wheelItems: MutableList<WheelItem> = ArrayList()
  
   wheelItems.add(WheelItem(
       Color.LTGRAY,
       BitmapFactory.decodeResource(resources, R.drawable.ic_action_name),
       "text 1"))
  
   wheelItems.add(WheelItem(Color.BLUE,
       BitmapFactory.decodeResource(resources, R.drawable.ic_action_name),
       "text 2"))
  
   wheelItems.add(WheelItem(Color.BLACK,
       BitmapFactory.decodeResource(resources, R.drawable.ic_action_name),
       "text 3"))
  
   wheelItems.add(WheelItem(Color.GRAY,
       BitmapFactory.decodeResource(resources, R.drawable.ic_action_name)
       ,"text 4"))
  
   wheelItems.add(WheelItem(Color.RED,
       BitmapFactory.decodeResource(resources, R.drawable.ic_action_name),
       "text 5"))
  
   wheelItems.add(WheelItem(Color.BLACK,
       BitmapFactory.decodeResource(resources, R.drawable.ic_action_name),
       "text 6")
   )
  
   luckyWheel.addWheelItems(wheelItems)
  

  }

}

frament_spinner.xml

<com.bluehomestudio.luckywheel.LuckyWheel
    android:id="@+id/lwv"
    android:layout_width="250dp"
    android:layout_height="250dp"
    android:layout_centerInParent="true"
    app:background_color="@color/colorPrimary" />

And after doing those code I was stuck on this failure:

2020-05-20 16:39:46.751 9412-9412/com.example.foodpicker E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.foodpicker, PID: 9412
java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference
at com.bluehomestudio.luckywheel.WheelView.onDraw(WheelView.java:232)
at android.view.View.draw(View.java:21594)
at android.view.View.updateDisplayListIfDirty(View.java:20471)
at android.view.View.draw(View.java:21326)
at android.view.ViewGroup.drawChild(ViewGroup.java:4413)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4174)
at android.view.View.updateDisplayListIfDirty(View.java:20462)
at android.view.View.draw(View.java:21326)
at android.view.ViewGroup.drawChild(ViewGroup.java:4413)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4174)
at android.view.View.updateDisplayListIfDirty(View.java:20462)
at android.view.View.draw(View.java:21326)
at android.view.ViewGroup.drawChild(ViewGroup.java:4413)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4174)
at android.view.View.updateDisplayListIfDirty(View.java:20462)
at android.view.View.draw(View.java:21326)
at android.view.ViewGroup.drawChild(ViewGroup.java:4413)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4174)
at android.view.View.updateDisplayListIfDirty(View.java:20462)
at android.view.View.draw(View.java:21326)
at android.view.ViewGroup.drawChild(ViewGroup.java:4413)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4174)
at androidx.constraintlayout.widget.ConstraintLayout.dispatchDraw(ConstraintLayout.java:2023)
at android.view.View.updateDisplayListIfDirty(View.java:20462)
at android.view.View.draw(View.java:21326)
at android.view.ViewGroup.drawChild(ViewGroup.java:4413)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4174)
at android.view.View.updateDisplayListIfDirty(View.java:20462)
at android.view.View.draw(View.java:21326)
at android.view.ViewGroup.drawChild(ViewGroup.java:4413)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4174)
at android.view.View.updateDisplayListIfDirty(View.java:20462)
at android.view.View.draw(View.java:21326)
at android.view.ViewGroup.drawChild(ViewGroup.java:4413)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4174)
at android.view.View.updateDisplayListIfDirty(View.java:20462)
at android.view.View.draw(View.java:21326)
at android.view.ViewGroup.drawChild(ViewGroup.java:4413)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4174)
at android.view.View.updateDisplayListIfDirty(View.java:20462)
at android.view.View.draw(View.java:21326)
at android.view.ViewGroup.drawChild(ViewGroup.java:4413)
at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4174)
at android.view.View.draw(View.java:21597)
at com.android.internal.policy.DecorView.draw(DecorView.java:815)
at android.view.View.updateDisplayListIfDirty(View.java:20471)
at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:580)
at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:586)
at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:659)
at android.view.ViewRootImpl.draw(ViewRootImpl.java:3871)
at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:3671)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2993)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1930)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7988)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1154)
at android.view.Choreographer.doCallbacks(Choreographer.java:977)
at android.view.Choreographer.doFrame(Choreographer.java:893)
at android.view.Choreographer$FrameHandler.handleMessage(Choreographer.java:1082)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7682)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:516)

Your help will be greatly appreciated!

Thanks!

i am failing to change the text size

Unknown attribute LuckyWheel:background_color.

<com.bluehomestudio.luckywheel.LuckyWheel
android:id="@+id/lwv"
android:layout_width="310dp"
android:layout_height="310dp"
android:layout_centerInParent="true"
android:layout_marginTop="56dp"
LuckyWheel:background_color="@color/colorPrimary"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintHorizontal_bias="0.495"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="@+id/turnText" />

thanks for the lib, what if I got 5k wheelItems ? (5k participants)
i see it crash or it freeze a lot, do you have any solution ? maybe change the type instead of a wheel a spinner and each second it show a textView ?

The documentation has many grammatical errors and is difficult to understand as a result. Most sections aren't more than a sentence fragment, and it leaves out many useful details.

I suggest that it be re-written to clean up the obvious errors and add more detail to its usage.

Would be a nice feature imho, if you take the speed of the users touch and turn the wheel based on this input

how to spin wheel infinite and set target dynamically

How to Disable Swipe Listener for spin?

Steps to Repro:

1. In Android Studio, create a new "Empty Activity" project
2. Per the LuckyWheel README.md, add the dependencies to the Gradle scripts
3. Open the activity_main.xml layout resource and add the XML block from the LuckyWheel README.md instructions

BUG: The build fails with the message "app\src\main\res\layout\activity_main.xml:18: AAPT: error: unbound prefix."

It seems like the fix is to remove the background_color attribute, so the XML block looks like this:

<com.bluehomestudio.luckywheel.LuckyWheel
        android:id="@+id/lwv"
        android:layout_width="250dp"
        android:layout_height="250dp"
        android:layout_centerInParent="true" />

but that means that we can't access LuckyWheel attributes in the XML settings. My guess is that a new XML namespace must be imported, but the README.md doesn't mention that before recommending the qualified XML attributes, and doesn't explain how to do the import.

Maybe the README.md should be changed to not mention the broken properties. Or, maybe it should offer complete instructions that show how to make them work correctly.

If we have 4,8 items then arrow are not on center please check the screenshot attached and one more thing

Steps to reproduce:

1. In Android Studio, create a new "Empty Activity" project
2. Per the LuckyWheel README.md, add the dependencies to the Gradle scripts
3. Open the activity_main.xml layout resource and add this XML block:

<com.bluehomestudio.luckywheel.LuckyWheel
        android:id="@+id/lwv"
        android:layout_width="250dp"
        android:layout_height="250dp"
        android:layout_centerInParent="true" />

4. With no other changes, build and run the application.

BUG: The application starts, then immediately crashes with this call stack:

D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
    Process: com.example.wheeltest1, PID: 20695
    java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference
        at com.bluehomestudio.luckywheel.WheelView.onDraw(WheelView.java:240)
        at android.view.View.draw(View.java:19123)
        at android.view.View.updateDisplayListIfDirty(View.java:18073)
        at android.view.View.draw(View.java:18851)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4214)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000)
        at android.view.View.updateDisplayListIfDirty(View.java:18064)
        at android.view.View.draw(View.java:18851)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4214)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000)
        at android.view.View.updateDisplayListIfDirty(View.java:18064)
        at android.view.View.draw(View.java:18851)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4214)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000)
        at androidx.constraintlayout.widget.ConstraintLayout.dispatchDraw(ConstraintLayout.java:1975)
        at android.view.View.updateDisplayListIfDirty(View.java:18064)
        at android.view.View.draw(View.java:18851)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4214)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000)
        at android.view.View.updateDisplayListIfDirty(View.java:18064)
        at android.view.View.draw(View.java:18851)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4214)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000)
        at android.view.View.updateDisplayListIfDirty(View.java:18064)
        at android.view.View.draw(View.java:18851)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4214)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000)
        at android.view.View.updateDisplayListIfDirty(View.java:18064)
        at android.view.View.draw(View.java:18851)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4214)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000)
        at android.view.View.updateDisplayListIfDirty(View.java:18064)
        at android.view.View.draw(View.java:18851)
        at android.view.ViewGroup.drawChild(ViewGroup.java:4214)
        at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4000)
        at android.view.View.draw(View.java:19126)
        at com.android.internal.policy.DecorView.draw(DecorView.java:785)
        at android.view.View.updateDisplayListIfDirty(View.java:18073)
        at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:643)
        at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:649)
        at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:757)
        at android.view.ViewRootImpl.draw(ViewRootImpl.java:2980)
        at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:2794)
        at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2347)
        at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1386)
        at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6733)
        at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
        at android.view.Choreographer.doCallbacks(Choreographer.java:723)
        at android.view.Choreographer.doFrame(Choreographer.java:658)
        at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
        at android.os.Handler.handleCallback(Handler.java:789)
        at android.os.Handler.dispatchMessage(Handler.java:98)
        at android.os.Looper.loop(Looper.java:164)
        at android.app.ActivityThread.main(ActivityThread.java:6541)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)

The problem is that the LuckyWheel doesn't check to see if the list of WheelItems is empty. While that's not a great use case, sometimes in development not all steps are completed. The control would offer developers a better experience if it was able to draw itself without crashing when it contained no WheelItems. Perhaps just a circle would be fine -- and maybe log a warning that there were no items in the control to be drawn.

please let us add more time to the wheel..
spinningTime(15000)

How i can change the direction of text in wheel to verticle bcz when there are more item the text ould not be readable

How can we set the specific time to wheel for spining?

After adding the list, the following error occurred when starting this project：
java.lang.NullPointerException: Attempt to invoke virtual method 'int android.graphics.Bitmap.getWidth()' on a null object reference at com.bluehomestudio.luckywheel.WheelView.drawImage(WheelView.java:133) at com.bluehomestudio.luckywheel.WheelView.onDraw(WheelView.java:245) at android.view.View.draw(View.java:21612) at android.view.View.updateDisplayListIfDirty(View.java:20481) at android.view.View.draw(View.java:21341) at android.view.ViewGroup.drawChild(ViewGroup.java:4417) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4177) at android.view.View.updateDisplayListIfDirty(View.java:20472) at android.view.View.draw(View.java:21341) at android.view.ViewGroup.drawChild(ViewGroup.java:4417) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4177) at android.view.View.updateDisplayListIfDirty(View.java:20472) at android.view.View.draw(View.java:21341) at android.view.ViewGroup.drawChild(ViewGroup.java:4417) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4177) at android.view.View.draw(View.java:21615) at android.view.View.updateDisplayListIfDirty(View.java:20481) at android.view.View.draw(View.java:21341) at android.view.ViewGroup.drawChild(ViewGroup.java:4417) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4177) at android.view.View.updateDisplayListIfDirty(View.java:20472) at android.view.View.draw(View.java:21341) at android.view.ViewGroup.drawChild(ViewGroup.java:4417) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4177) at android.view.View.updateDisplayListIfDirty(View.java:20472) at android.view.View.draw(View.java:21341) at android.view.ViewGroup.drawChild(ViewGroup.java:4417) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4177) at android.view.View.updateDisplayListIfDirty(View.java:20472) at android.view.View.draw(View.java:21341) at android.view.ViewGroup.drawChild(ViewGroup.java:4417) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4177) at android.view.View.updateDisplayListIfDirty(View.java:20472) at android.view.View.draw(View.java:21341) at android.view.ViewGroup.drawChild(ViewGroup.java:4417) at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4177) at android.view.View.draw(View.java:21615) at com.android.internal.policy.DecorView.draw(DecorView.java:844) at android.view.View.updateDisplayListIfDirty(View.java:20481) at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:575) at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:581) at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:654) at android.view.ViewRootImpl.draw(ViewRootImpl.java:3735) at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:3530) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2867) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1820) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:7782) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1031) at android.view.Choreographer.doCallbacks(Choreographer.java:854) at android.view.Choreographer.doFrame(Choreographer.java:789) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1016) at android.os.Handler.handleCallback(Handler.java:883) at android.os.Handler.dispatchMessage(Handler.java:100) at android.os.Looper.loop(Looper.java:224) at android.app.ActivityThread.main(ActivityThread.java:7562) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)

Android studio version:2021.2.1

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