[英]Android/Kotlin: How to show an activity as a popup/dialog when clicking on a card from a recyclerview?
我到處搜索它,但我還沒有找到滿意的答案。 所以,我想知道:如何在從回收站視圖中單擊卡片時將活動顯示為彈出窗口/對話框? 它是直接通過適配器制作的嗎? 我需要第二個活動來做到這一點,還是只需要另一個布局。xml 就足夠了?
我試過了:
android:theme="@style/Theme.AppCompat.Dialog"
但是每次我從 recyclerview 中點擊卡片時都會拋出以下錯誤:
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.softdevandre.marvelapi/com.softdevandre.marvelapi.ui.DetailCharacterActivity}: android.view.InflateException: Binary XML file line #11 in com.softdevandre.marvelapi:layout/activity_detail_character: Binary XML file line #11 in com.softdevandre.marvelapi:layout/activity_detail_character: Error inflating class <unknown>
安卓清單.xml:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
package="com.softdevandre.marvelapi" >
<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.MarvelAPI"
tools:targetApi="31" >
<activity
android:name=".ui.DetailCharacterActivity"
android:theme="@style/Theme.AppCompat.Dialog"
android:autoRemoveFromRecents="true"
android:parentActivityName=".MainActivity"
android:exported="false" >
<meta-data
android:name="android.app.lib_name"
android:value="" />
</activity>
<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>
activity_detail_character.xml:
<?xml version="1.0" encoding="utf-8"?>
<com.google.android.material.card.MaterialCardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="255dp"
android:layout_margin="8dp"
app:cardElevation="5dp"
app:cardCornerRadius="8dp"
tools:context=".ui.DetailCharacterActivity">
<androidx.constraintlayout.widget.ConstraintLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<androidx.appcompat.widget.AppCompatImageView
android:id="@+id/ivCharacter"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:scaleType="centerCrop"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent"
tools:ignore="ImageContrastCheck"
tools:srcCompat="@tools:sample/avatars" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:background="#80CC0000"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent">
<com.google.android.material.textview.MaterialTextView
android:id="@+id/tvCharacterName"
android:layout_width="match_parent"
android:textColor="@color/white"
android:gravity="center"
android:layout_height="match_parent"
android:layout_marginStart="12dp"
android:layout_marginBottom="12dp"
android:layout_marginEnd="12dp"
android:layout_marginTop="8dp"
android:textSize="16sp"
android:textStyle="bold"
tools:text="Character Name" />
</LinearLayout>
</androidx.constraintlayout.widget.ConstraintLayout>
</com.google.android.material.card.MaterialCardView>
物品角色適配器.kt:
class ItemCharacterAdapter(private val context: Context, private val dataset: List<Characters>) :
RecyclerView.Adapter<ItemCharacterAdapter.CharacterViewHolder>() {
class CharacterViewHolder(binding: ItemCharacterBinding) :
RecyclerView.ViewHolder(binding.root) {
val textView: TextView = binding.tvCharacterName
val imageView: ImageView = binding.ivCharacter
val materialCard: MaterialCardView = binding.mcvCharacter
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): CharacterViewHolder {
// create new view
val adapterLayout =
ItemCharacterBinding.inflate(LayoutInflater.from(parent.context), parent, false)
return CharacterViewHolder(adapterLayout)
}
override fun onBindViewHolder(holder: CharacterViewHolder, position: Int) {
val item = dataset[position]
holder.textView.text = context.resources.getString(item.name)
holder.imageView.setImageResource(item.image)
holder.materialCard.setOnClickListener {
val intent = Intent(context, DetailCharacterActivity::class.java)
context.startActivity(intent)
}
}
override fun getItemCount() = dataset.size
}
主要活動.kt:
class MainActivity : AppCompatActivity() {
private val binding by lazy {
ActivityMainBinding.inflate(layoutInflater)
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(binding.root)
val myDataset = Datasource().loadCharacters()
val recyclerView = binding.rvCharacterList
recyclerView.adapter = ItemCharacterAdapter(this, myDataset)
}
}
提前致謝。
要像在AndroidManifest.xml
中定義的對話框那樣啟動活動:
<activity android:theme="@android:style/Theme.Dialog" />
在您的活動標簽內使用此屬性以避免您的對話框出現在最近使用的應用程序列表中
android:excludeFromRecents="true"
如果您想在用戶單擊對話框外部時停止銷毀您的對話框/活動:
在您的 Activity 中使用setContentView()
之后:
this.setFinishOnTouchOutside(false);
現在,在您的回收器視圖卡上調用startActivity()
,單擊它顯示為一個對話框,當用戶按下后退按鈕時會顯示上一個活動。
請注意,如果您使用的是 ActionBarActivity(或 AppCompat 主題),則需要改用@style/Theme.AppCompat.Dialog
。
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