Progressbar is not changing progress in loop - android-studio

Question

I have problem with changing status in my progress bar on my app.
I have while loop which is changing status from 1-100 every 100ms.
Loop works cause when I'm making Log checker which shows how much is actually equals "I" it's from 1-100.
When i'm putting manualy progress to for example 50 it shows but nothing change.
class StartActivity : AppCompatActivity() {
private var progressBar: ProgressBar? = null
private val handler = Handler()
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_start)
progressBar = findViewById<ProgressBar>(R.id.progressBar_activityStart)
startProgressBar()
}
private fun startProgressBar() {
progressBar!!.visibility = View.VISIBLE
var i: Int = progressBar!!.progress
progressBar!!.progress = 0
Thread {
while (i < 100) {
i += 1
handler.post {
progressBar!!.progress = i
Log.v("progress", i.toString())
}
try {
progressBar!!.progress = i
Thread.sleep(100)
} catch (e: InterruptedException) {
e.printStackTrace()
}
}
progressBar!!.visibility = View.INVISIBLE
}.start()
}
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
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"
android:background="#color/white"
tools:context=".StartActivity">
<ImageView
android:id="#+id/imageView_activityStart_logo"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#color/white"
android:layout_centerInParent="true"
android:src="#drawable/logohorizontal" />
<ProgressBar
android:id="#+id/progressBar_activityStart"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/imageView_activityStart_logo"
android:layout_alignBottom="#+id/imageView_activityStart_logo"
android:layout_marginStart="30dp"
android:layout_marginTop="30dp"
android:layout_marginEnd="30dp"
android:layout_marginBottom="30dp"
android:indeterminate="false"
android:visibility="visible" />
</RelativeLayout>

Answer 1

i had the same problem, then i changed
<ProgressBar
android:id="#+id/progressBar_activityStart"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="visible" />
to this:
<android.widget.ProgressBar
android:id="#+id/progressBar_activityStart"
style="?android:attr/progressBarStyleHorizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:visibility="visible" />
then its worked. dont know what the problem is.

Answer 2

You can try to use androidx.core.widget.ContentLoadingProgressBar.