質問編集履歴
3
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__解決後Activity.kt__
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```
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test
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@@ -309,3 +309,123 @@
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</androidx.constraintlayout.widget.ConstraintLayout>
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```
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---
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*解決後Activity.kt*
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```
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// 登録
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class Registration__Activity : AppCompatActivity() {
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override fun onCreate(savedInstanceState: Bundle?) {
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super.onCreate(savedInstanceState)
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setContentView(R.layout.activity_registration__)
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val SQLite__Helper = SQLite__Helper(this)
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fun Context.showToast(text: CharSequence) =
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Toast.makeText(this, text, Toast.LENGTH_SHORT).show()
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// Toastを簡素化
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itmAddBtn.setOnClickListener {
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var itmNM : String? = edtNM.text.toString()
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var itmPrc: String? = edtPrc.text.toString()
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var itmStr: String
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if (itmNM?.isNotBlank()!!){ //空白も含まない
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itmStr = itmNM
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}else{
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showToast("名前を入力してください")
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return@setOnClickListener
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} //空白か未入力であればメッセージを表示
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var itmInt: Int
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when(itmPrc?.toIntOrNull()){ //Int型にキャストするか、nullにする
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is Int-> {
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itmInt = itmPrc.toInt()
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} //その結果の型をInt
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else-> {
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showToast("数値を入力してください")
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edtPrc.setText("")
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return@setOnClickListener
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} //そうでないかnullであればメッセージを表示
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}
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var itmInstance = ItmMdl(
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itmStr, itmInt
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)
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var result = SQLite__Helper.insertItm(itmInstance)
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if (result) {
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showToast("商品登録！")
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edtNM.setText("")
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edtPrc.setText("")
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}
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}
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}
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}
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```
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1
追記
test
CHANGED
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File without changes
|
test
CHANGED
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@@ -163,3 +163,149 @@
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}
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```
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レイアウトXML
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```xml
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<?xml version="1.0" encoding="utf-8"?>
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<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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tools:context=".Registration__Activity">
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<TextView
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android:id="@+id/textView"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_marginTop="24dp"
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android:text="商品登録"
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android:textSize="30sp"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintStart_toStartOf="parent"
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app:layout_constraintTop_toTopOf="parent" />
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<EditText
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android:id="@+id/edtNM"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_marginTop="100dp"
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android:ems="10"
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android:inputType="textPersonName"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintStart_toStartOf="parent"
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app:layout_constraintTop_toBottomOf="@+id/textView" />
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<TextView
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android:id="@+id/textView2"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_marginBottom="16dp"
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android:text="商品名"
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app:layout_constraintBottom_toTopOf="@+id/edtNM"
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app:layout_constraintStart_toStartOf="@+id/edtNM" />
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<EditText
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android:id="@+id/edtPrc"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_marginTop="70dp"
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android:ems="10"
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android:inputType="numberDecimal"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintStart_toStartOf="parent"
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app:layout_constraintTop_toBottomOf="@+id/edtNM" />
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<TextView
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android:id="@+id/textView3"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_marginBottom="16dp"
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android:text="値段"
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app:layout_constraintBottom_toTopOf="@+id/edtPrc"
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app:layout_constraintStart_toStartOf="@+id/edtPrc" />
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<Button
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android:id="@+id/itmAddBtn"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_marginBottom="50dp"
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android:background="#FF9800"
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android:text="商品登録"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintStart_toStartOf="parent" />
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309
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</androidx.constraintlayout.widget.ConstraintLayout>
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310
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311
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```
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