Я столкнулся с проблемой: «<Имя приложения> остановлено» ⇐ Android

[Anonymous]

каждый раз, когда я пытаюсь открыть приложение, оно постоянно останавливается. Эта проблема возникает и во многих других проектах.
Вот мой файл MainActivity.kt
package com.shahid.timerlivedata

import android.annotation.SuppressLint
import android.os.Bundle
import android.widget.TextView
import android.widget.Toast
import androidx.activity.enableEdgeToEdge
import androidx.appcompat.app.AppCompatActivity
import androidx.core.view.ViewCompat
import androidx.core.view.WindowInsetsCompat
import androidx.lifecycle.Observer
import androidx.lifecycle.ViewModelProvider

class MainActivity : AppCompatActivity() {
@SuppressLint("MissingInflatedId")
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
enableEdgeToEdge()
setContentView(R.layout.activity_main)
ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main)) { v, insets ->
val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom)
insets
}

val TxtCount = findViewById(R.id.txtCount)
val edtCount = findViewById(R.id.edtCount)
val btnStart = findViewById(R.id.btnStart)
val btnStop = findViewById(R.id.btnStop)

val mAVieModel = ViewModelProvider(this).get(MainActivityViewModel::class.java)
mAVieModel.startTimer()

mAVieModel._seconds.observe(this, Observer{ seconds ->
TxtCount.text = "$seconds"

})
mAVieModel.finished.observe(this, Observer { check ->
if(check){
Toast.makeText(this,"Time Completed!!", Toast.LENGTH_LONG).show()
}

})

btnStart.setOnClickListener{
if(edtCount.text.isEmpty()){
Toast.makeText(this,"Please Fill the Time", Toast.LENGTH_LONG).show()
}else{
mAVieModel.timerValue.value = edtCount.text.toString().toLong()*1000
mAVieModel.startTimer()
}
}
btnStop.setOnClickListener{
mAVieModel.stopTimer()
}
}
}

Вот мой LogCat . Я думаю, что настоящая проблема здесь, но я не могу ее понять ->
[871] amjc.a(209): VerifyApps: APK Analysis scan failed for com.shahid.timerlivedata (Ask Gemini)
com.google.android.finsky.verifier.apkanalysis.client.ApkAnalysisException: DOWNLOAD_FILE_NOT_FOUND_EXCEPTION while analyzing APK
at ambw.b(PG:1260)
at ambw.a(PG:13)
at bgbs.M(PG:14)
at bgbs.d(PG:10)
at algz.b(PG:605)
at algz.a(PG:222)
at bfwu.J(PG:40)
at bfwu.C(PG:12)
at amjc.a(PG:113)
at algz.b(PG:632)
at bfvd.x(PG:6)
at bgcb.run(PG:111)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
at qek.run(PG:1211)
at java.lang.Thread.run(Thread.java:761)
Package still installed com.shahid.timerlivedata
Late-enabling -Xcheck:jni
Unexpected CPU variant for X86 using defaults: x86
ClassLoader referenced unknown path: /data/app/com.shahid.timerlivedata-1/lib/x86
Background sticky concurrent mark sweep GC freed 21607(876KB) AllocSpace objects, 0(0B) LOS objects, 49% free, 4MB/8MB, paused 6.612ms total 210.244ms
Checking for metadata for AppLocalesMetadataHolderService : Service not found
Before Android 4.1, method android.graphics.PorterDuffColorFilter androidx.vectordrawable.graphics.drawable.VectorDrawableCompat.updateTintFilter(android.graphics.PorterDuffColorFilter, android.content.res.ColorStateList, android.graphics.PorterDuff$Mode) would have incorrectly overridden the package-private method in android.graphics.drawable.Drawable
Shutting down VM
FATAL EXCEPTION: main (Ask Gemini)
Process: com.shahid.timerlivedata, PID: 14609
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.shahid.timerlivedata/com.shahid.timerlivedata.MainActivity}: java.lang.NullPointerException
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2665)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6119)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776)
Caused by: java.lang.NullPointerException
at com.shahid.timerlivedata.MainActivityViewModel.startTimer(MainActivityViewModel.kt:24)
at com.shahid.timerlivedata.MainActivity.onCreate(MainActivity.kt:32)
at android.app.Activity.performCreate(Activity.java:6679)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2618)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2726) 
at android.app.ActivityThread.-wrap12(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1477) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:6119) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:886) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:776) 
Debugger is no longer active
Starting a blocking GC Instrumentation


Вот мой Activity_main.kt













Вот еще один ViewModel.kt
package com.shahid.timerlivedata

import android.os.CountDownTimer
import androidx.lifecycle.LiveData
import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.ViewModel

class MainActivityViewModel : ViewModel() {

lateinit var timer : CountDownTimer

private var remaining_seconds = MutableLiveData()
private var _finished = MutableLiveData()

val finished : LiveData
get() = _finished

val _seconds : LiveData
get() = remaining_seconds

var timerValue = MutableLiveData()

fun startTimer(){
timer = object : CountDownTimer(timerValue.value!!.toLong(),1000) {
override fun onTick(millisUntilFinished: Long) {
val remainingTime = millisUntilFinished/1000
remaining_seconds.value = remainingTime.toInt()
}

override fun onFinish() {
_finished.value = true

}

}
}
fun stopTimer (){
timer.cancel()
}

}



Подробнее здесь: https://stackoverflow.com/questions/790 ... as-stopped