优化数值选择器界面

app/src/main/java/io/legato/kazusa/ui/widget/number/NumberPickerDialog.kt

@@ -4,7 +4,6 @@ import android.app.AlertDialog
 import android.content.Context
 import android.view.View
 import android.widget.NumberPicker
-import android.widget.TextView
 import com.google.android.material.button.MaterialButton
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.textfield.TextInputEditText
@@ -17,7 +16,6 @@ class NumberPickerDialog(context: Context) {
     private var numberPicker: NumberPicker? = null
     private var editText: TextInputEditText? = null
     private var inputLayout: TextInputLayout? = null
-    private var tvRange: TextView? = null
     private var maxValue: Int? = null
     private var minValue: Int? = null
     private var value: Int? = null
@@ -63,7 +61,6 @@ class NumberPickerDialog(context: Context) {
         numberPicker = dialog.findViewById(R.id.number_picker)
         inputLayout = dialog.findViewById(R.id.til_input)
         editText = dialog.findViewById(R.id.et_input)
-        tvRange = dialog.findViewById(R.id.tv_range)
         val btnSwitch = dialog.findViewById<MaterialButton>(R.id.btn_switch_input)
 
         numberPicker?.let { np ->
@@ -71,20 +68,23 @@ class NumberPickerDialog(context: Context) {
             maxValue?.let { np.maxValue = it }
             value?.let { np.value = it }
         }
-        tvRange?.text = "输入范围: ${numberPicker?.minValue} - ${numberPicker?.maxValue}"
 
         btnSwitch?.setOnClickListener {
             useInputMode = !useInputMode
             if (useInputMode) {
                 numberPicker?.visibility = View.GONE
                 inputLayout?.visibility = View.VISIBLE
-                tvRange?.visibility = View.VISIBLE
+
+                val min = minValue ?: numberPicker?.minValue
+                val max = maxValue ?: numberPicker?.maxValue
+                inputLayout?.hint = "输入范围: $min - $max"
+
                 editText?.setText(numberPicker?.value?.toString() ?: value?.toString())
             } else {
                 numberPicker?.visibility = View.VISIBLE
                 inputLayout?.visibility = View.GONE
-                tvRange?.visibility = View.GONE
                 inputLayout?.error = null
+                inputLayout?.hint = null
             }
         }