正在运行应用程序

Question

我在Android Studio中运行名为belajar的应用程序时遇到问题。来自使用：

1. activity_home.xml：

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
tools:context=".HomeActivity">
<androidx.appcompat.widget.Toolbar
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/white"
android:elevation="4dp"
app:layout_constraintTop_toTopOf="parent"
app:title="Belajar"
app:titleTextColor="@color/black"/>
<ProgressBar
android:id="@+id/pb_home"
style="@style/Widget.AppCompat.ProgressBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:indeterminate="true"
android:indeterminateTint="@color/black"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:visibility="gone"/>
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rv_home"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="@android:attr/actionBarSize"
android:scrollbars="vertical"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
tools:listitem="@layout/item_home"/>
</androidx.constraintlayout.widget.ConstraintLayout>

2. HomeActivity.xml：

package id.kotlin.belajar
import android.os.Bundle
import android.util.Log
import android.view.View
import android.widget.ProgressBar
import androidx.appcompat.app.AppCompatActivity
import androidx.recyclerview.widget.DividerItemDecoration
import androidx.recyclerview.widget.RecyclerView
import id.kotlin.belajar.NetworkProvider.providesHttpAdapter
import retrofit2.Call
import retrofit2.Callback
import retrofit2.Response

class HomeActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
this.setContentView(R.layout.activity_home)
val progressBar = findViewById<ProgressBar>(R.id.pb_home)
val dataSource = providesHttpAdapter().create(HomeDataSource::class.java)
dataSource.discoverMovie().enqueue(object : Callback<HomeResponse>{
override fun onResponse(call: Call<HomeResponse>, response: Response<HomeResponse>) {
progressBar.visibility = View.GONE
val company = response.body()?.company
val itemAdapter = findViewById<RecyclerView>(R.id.rv_home)
itemAdapter.addItemDecoration(
DividerItemDecoration(
this@HomeActivity,
DividerItemDecoration.VERTICAL
)
)
itemAdapter.adapter = HomeAdapter(company ?: emptyList())
}
override fun onFailure(call: Call<HomeResponse>, t: Throwable){
Log.e(HomeActivity::class.java.simpleName, "${t.printStackTrace()}")
}
})
}
}

但我在运行应用程序时遇到了一个错误：

2022-04-01 13:35:50.652 7386-7386/id.kotlin.belajar E/AndroidRuntime: FATAL EXCEPTION: main
Process: id.kotlin.belajar, PID: 7386
java.lang.RuntimeException: Unable to start activity ComponentInfo{id.kotlin.belajar/id.kotlin.belajar.HomeActivity}: android.view.InflateException: Binary XML file line #31: Binary XML file line #31: Error inflating class androidx.recyclerview.widget.RecyclerView
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2646)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
Caused by: android.view.InflateException: Binary XML file line #31: Binary XML file line #31: Error inflating class androidx.recyclerview.widget.RecyclerView
Caused by: android.view.InflateException: Binary XML file line #31: Error inflating class androidx.recyclerview.widget.RecyclerView
Caused by: java.lang.reflect.InvocationTargetException
at java.lang.reflect.Constructor.newInstance0(Native Method)
at java.lang.reflect.Constructor.newInstance(Constructor.java:430)
at android.view.LayoutInflater.createView(LayoutInflater.java:645)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:787)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:858)
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821)
at android.view.LayoutInflater.inflate(LayoutInflater.java:518)
at android.view.LayoutInflater.inflate(LayoutInflater.java:426)
at android.view.LayoutInflater.inflate(LayoutInflater.java:377)
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:706)
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:195)
at id.kotlin.belajar.HomeActivity.onCreate(HomeActivity.kt:19)
at android.app.Activity.performCreate(Activity.java:6662)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707)
at android.app.ActivityThread.-wrap12(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756)
Caused by: java.lang.UnsupportedOperationException: Can't convert value at index 16 to dimension: type=0x1
at android.content.res.TypedArray.getDimensionPixelSize(TypedArray.java:720)
at android.view.View.<init>(View.java:4190)
at android.view.ViewGroup.<init>(ViewGroup.java:578)
at android.view.ViewGroup.<init>(ViewGroup.java:574)
at androidx.recyclerview.widget.RecyclerView.<init>(RecyclerView.java:654)
at androidx.recyclerview.widget.RecyclerView.<init>(RecyclerView.java:650)
at java.lang.reflect.Constructor.newInstance0(Native Method) 
at java.lang.reflect.Constructor.newInstance(Constructor.java:430) 
at android.view.LayoutInflater.createView(LayoutInflater.java:645) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:787) 
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:727) 
at android.view.LayoutInflater.rInflate(LayoutInflater.java:858) 
at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:821) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:518) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:426) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:377) 
at androidx.appcompat.app.AppCompatDelegateImpl.setContentView(AppCompatDelegateImpl.java:706) 
at androidx.appcompat.app.AppCompatActivity.setContentView(AppCompatActivity.java:195) 
at id.kotlin.belajar.HomeActivity.onCreate(HomeActivity.kt:19) 
at android.app.Activity.performCreate(Activity.java:6662) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1118) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2599) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2707) 
at android.app.ActivityThread.-wrap12(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1460) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:154) 
at android.app.ActivityThread.main(ActivityThread.java:6077) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:866) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:756) 

我需要帮助来解决这个问题。这是我第一次在Android Studio中使用kotlin。这是我为发展我的技能而进行的训练。任何人都可以用skype和我讨论。谢谢

Answer 1

您正在使用ConstraintLayout。请确保您需要使用它的属性。此处示例：

app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"

以下完整示例：

<androidx.recyclerview.widget.RecyclerView
android:id="@+id/rv_home"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingTop="@android:attr/actionBarSize"
android:scrollbars="vertical"
app:layoutManager="androidx.recyclerview.widget.LinearLayoutManager"
tools:listitem="@layout/item_home"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"/>