Fix unexpected jumping to the bottom on tap

Author: tamo

app/src/main/java/jp/deadend/noname/skk/SKKKanaRuleManager.kt

@@ -1,9 +1,14 @@
 package jp.deadend.noname.skk
 
+import android.content.Context
 import android.content.Intent
+import android.graphics.Rect
 import android.os.Bundle
+import android.util.AttributeSet
 import android.view.Menu
 import android.view.MenuItem
+import android.view.View
+import android.widget.ScrollView
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.ViewCompat
@@ -112,3 +117,10 @@ class SKKKanaRuleManager : AppCompatActivity() {
         }
     }
 }
+
+class StableScrollView @JvmOverloads constructor(c: Context, a: AttributeSet? = null, d: Int = 0) :
+    ScrollView(c, a, d) {
+    override fun requestChildRectangleOnScreen(c: View, r: Rect, i: Boolean): Boolean {
+        return false
+    }
+}

app/src/main/res/layout/activity_kana_rule_manager.xml

@@ -10,7 +10,7 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content" />
 
-    <ScrollView
+    <jp.deadend.noname.skk.StableScrollView
         android:layout_width="match_parent"
         android:layout_height="match_parent">
 
@@ -21,5 +21,5 @@
             android:autofillHints="romaji"
             android:hint="@string/hint_kana_rule_editor"
             android:inputType="textMultiLine" />
-    </ScrollView>
+    </jp.deadend.noname.skk.StableScrollView>
 </LinearLayout>