вылетает при открытии приложения
приложение справочник растений вылетает как только я его открываю, использую RecyclerView
MainActivity:
class MainActivity : AppCompatActivity() {
private lateinit var bindingClass: ActivityMainBinding
private val adapter = PlantAdapter()
private var launcher: ActivityResultLauncher<Intent>? = null
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
enableEdgeToEdge()
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
}
bindingClass = ActivityMainBinding.inflate(layoutInflater)
setContentView(bindingClass.root)
init()
launcher = registerForActivityResult(ActivityResultContracts.StartActivityForResult()){
if(it.resultCode == RESULT_OK){
adapter.addPlant(it.data?.getSerializableExtra("plant") as Plant)
}
}
}
private fun init() {
bindingClass.apply {
rcView.layoutManager = GridLayoutManager(this@MainActivity, 3)
rcView.adapter = adapter
buttonAdd.setOnClickListener {
launcher?.launch(Intent(this@MainActivity, EditActivity::class.java))
}
}
}
}
EditActivity:
class EditActivity : AppCompatActivity() {
lateinit var bindingClass: ActivityEditBinding
private var indexImage = 0
private var imageIdLIst = listOf(R.drawable.aloe_traski,
R.drawable.amarillis,
R.drawable.alststromeria,
R.drawable.agapantus,
R.drawable.allium)
private var imageId = 0
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
enableEdgeToEdge()
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
}
bindingClass = ActivityEditBinding.inflate(layoutInflater)
setContentView(bindingClass.root)
}
fun initButtons(view: View) = with(bindingClass){
bSkipImage.setOnClickListener{
indexImage++
if(indexImage > imageIdLIst.size - 1) indexImage = 0
Log.d("MyLog", "Index = $indexImage")
}
}
}
Plant:
data class Plant(val imageId: Int, val title: String, val description: String): Serializable
PlantAdapter:
class PlantAdapter : RecyclerView.Adapter<PlantAdapter.PlantHolder>() {
val plantList = ArrayList<Plant>()
class PlantHolder(item: View): RecyclerView.ViewHolder(item) {
val binding = PlantItemBinding.bind(item)
fun bind(plant: Plant){
binding.im.setImageResource(plant.imageId)
binding.tvTitle.text = plant.title
}
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): PlantHolder {
val view = LayoutInflater.from(parent.context).inflate(R.layout.plant_item, parent, false)
return PlantHolder(view)
}
override fun getItemCount(): Int {
return plantList.size
}
override fun onBindViewHolder(holder: PlantHolder, position: Int) {
holder.bind(plantList[position])
}
fun addPlant(plant: Plant){
plantList.add(plant)
notifyDataSetChanged()
}
}
activity_edit:
<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:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#A8A4A4"
tools:context=".EditActivity">
<androidx.cardview.widget.CardView
android:id="@+id/cardView"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_margin="5dp"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_marginStart="5dp"
android:layout_marginEnd="5dp"
android:orientation="horizontal">
<ImageView
android:id="@+id/imageView"
android:layout_width="270dp"
android:layout_height="210dp"
android:layout_margin="5dp"
tools:srcCompat="@drawable/allium" />
</LinearLayout>
<Button
android:id="@+id/bSkipImage"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|end"
android:onClick="initButtons"
android:text="Next Image"
android:visibility="visible" />
</androidx.cardview.widget.CardView>
<androidx.cardview.widget.CardView
android:layout_width="0dp"
android:layout_height="0dp"
android:layout_marginTop="5dp"
android:layout_marginBottom="5dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="@+id/cardView"
app:layout_constraintHorizontal_bias="0.0"
app:layout_constraintStart_toStartOf="@+id/cardView"
app:layout_constraintTop_toBottomOf="@+id/cardView"
app:layout_constraintVertical_bias="1.0">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<EditText
android:id="@+id/edTitle"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_margin="10dp"
android:layout_weight="1"
android:ems="10"
android:hint="Title"
android:inputType="text"
tools:ignore="TouchTargetSizeCheck" />
<EditText
android:id="@+id/edDescription"
android:layout_width="match_parent"
android:layout_height="50dp"
android:layout_margin="10dp"
android:layout_weight="1"
android:ems="10"
android:hint="Description"
android:inputType="text"
tools:ignore="TouchTargetSizeCheck" />
<Button
android:id="@+id/bDone"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="5dp"
android:layout_marginEnd="5dp"
android:text="Done" />
</LinearLayout>
</androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>
activity_main:
<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:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#C3BFBF"
tools:context=".MainActivity">
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rcView"
android:layout_width="409dp"
android:layout_height="wrap_content"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
app:layout_constraintVertical_bias="0.00999999" />
<Button
android:id="@+id/buttonAdd"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="110dp"
android:text="Add Plant"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
plant_item:
<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:id="@+id/main"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.cardview.widget.CardView
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="8dp"
android:layout_marginTop="8dp"
android:layout_marginEnd="8dp"
android:layout_marginBottom="8dp"
app:cardCornerRadius="6dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:id="@+id/im"
android:layout_width="wrap_content"
android:layout_height="125dp"
android:layout_margin="3dp"
android:src="@drawable/allium" />
<TextView
android:id="@+id/tvTitle"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="5dp"
android:fontFamily="sans-serif-condensed"
android:gravity="center"
android:text="TextView"
android:textColor="#000000"
android:textSize="16sp"
android:textStyle="bold" />
</LinearLayout>
</androidx.cardview.widget.CardView>
</androidx.constraintlayout.widget.ConstraintLayout>
Manifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools">
<application
android:allowBackup="true"
android:dataExtractionRules="@xml/data_extraction_rules"
android:fullBackupContent="@xml/backup_rules"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.RecyclerView"
tools:targetApi="31">
<activity
android:name=".EditActivity"
android:exported="false" />
<activity
android:name=".MainActivity"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
Лог из LogCat:
FATAL EXCEPTION: main (Ask Gemini)
Process: com.example.recyclerview, PID: 20926
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.recyclerview/com.example.recyclerview.MainActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setOnApplyWindowInsetsListener(android.view.View$OnApplyWindowInsetsListener)' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4164)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4322)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:139)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:96)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2685)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loopOnce(Looper.java:230)
at android.os.Looper.loop(Looper.java:319)
at android.app.ActivityThread.main(ActivityThread.java:8893)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:608)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.View.setOnApplyWindowInsetsListener(android.view.View$OnApplyWindowInsetsListener)' on a null object reference
at androidx.core.view.ViewCompat$Api21Impl.setOnApplyWindowInsetsListener(ViewCompat.java:5284)
at androidx.core.view.ViewCompat.setOnApplyWindowInsetsListener(ViewCompat.java:2962)
at com.example.recyclerview.MainActivity.onCreate(MainActivity.kt:23)
at android.app.Activity.performCreate(Activity.java:8944)
at android.app.Activity.performCreate(Activity.java:8913)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1456)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:4146)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4322)
at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:103)
at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:139)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:96)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2685)
at android.os.Handler.dispatchMessage(Handler.java:106)
at android.os.Looper.loopOnce(Looper.java:230)
at android.os.Looper.loop(Looper.java:319)
at android.app.ActivityThread.main(ActivityThread.java:8893)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:608)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)
2024-12-28 21:42:15.951 892-1236 BufferQueueDebug surfaceflinger E [Surface(name=1667e5b NavigationBar0)/@0x55ad5d1 - animation-leash of insets_animation#409](this:0xe75e90b8,id:-1,api:0,p:-1,c:-1) id info cannot be read from 'Surface(name=1667e5b NavigationBar0)/@0x55ad5d1 - animation-leash of insets_animation#409'
Я знаю что в приложении много hard кода и то что оно еще не готово даже данные не сохраняются но я не понимаю почему у меня вылетает сейчас мне нужно посмотреть на сам edit_activity чтоб понимать от чего отталкиваться но я не совсем понимаю в чем проблема
Ответы (1 шт):
Автор решения: Eugene Krivenja
→ Ссылка
Нельзя вызывать
ViewCompat.setOnApplyWindowInsetsListener(findViewById(...))
до того как вызван
setContentView(...)
Потому что findViewById(...) вернет null