created vertical variant of questionnaires

app/src/main/AndroidManifest.xml

@@ -41,6 +41,11 @@
             </intent-filter>
         </activity>
 
+        <activity
+            android:name=".ui.DevSettingsActivity"
+            android:exported="false"
+            android:parentActivityName=".MainActivity" />
+
     </application>
 
 </manifest>

app/src/main/java/com/dano/test1/questionnaire/QuestionnaireAllInOne.kt

@@ -0,0 +1,522 @@
+package com.dano.test1.questionnaire
+
+import android.graphics.Color
+import android.text.Editable
+import android.text.TextWatcher
+import android.util.TypedValue
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.*
+import androidx.constraintlayout.widget.ConstraintLayout
+import com.dano.test1.LanguageManager
+import com.dano.test1.LocalizationHelper
+import com.dano.test1.MainActivity
+import com.dano.test1.R
+import com.dano.test1.network.TokenStore
+import com.dano.test1.utils.ViewUtils
+import com.google.android.material.button.MaterialButton
+import com.google.android.material.card.MaterialCardView
+import kotlinx.coroutines.*
+
+class QuestionnaireAllInOne(private val questionnaireFileName: String) : QuestionnaireBase<Unit>() {
+
+    private data class Section(
+        val index: Int,
+        val question: QuestionItem,
+        val card: MaterialCardView,
+        val sectionView: View,
+        val handler: QuestionHandler?
+    )
+
+    private val sections = mutableListOf<Section>()
+    private lateinit var container: LinearLayout
+    private lateinit var btnSave: MaterialButton
+    private var setupComplete = false
+
+    override fun startQuestionnaire() {
+        val (meta, questionsList) = loadQuestionnaireFromJson(questionnaireFileName)
+        questionnaireMeta = meta
+        questions = questionsList
+        currentIndex = 0
+        buildAllInOneUi()
+    }
+
+    override fun showCurrentQuestion() {
+        // Not used in all-in-one mode
+    }
+
+    private fun buildAllInOneUi() {
+        context.setContentView(R.layout.questionnaire_all_in_one)
+
+        container = context.findViewById(R.id.questionContainer)
+        btnSave = context.findViewById(R.id.btnSave)
+        val btnBack = context.findViewById<MaterialButton>(R.id.btnBack)
+        val progressBar = context.findViewById<ProgressBar>(R.id.progressBar)
+
+        btnSave.text = LanguageManager.getText(languageID, "save")
+        ViewUtils.setTextSizePercentOfScreenHeight(btnSave, 0.025f)
+
+        btnSave.isEnabled = false
+        btnSave.alpha = 0.5f
+
+        btnBack.setOnClickListener {
+            (context as? MainActivity)?.finishQuestionnaire()
+        }
+
+        val inflater = LayoutInflater.from(context)
+
+        for ((idx, question) in questions.withIndex()) {
+            if (question is QuestionItem.LastPage) continue
+
+            val layoutResId = getLayoutResId(question.layout ?: "default_layout")
+            if (layoutResId == 0) continue
+
+            val sectionView = inflater.inflate(layoutResId, container, false)
+            adaptLayoutForEmbedding(sectionView)
+            LocalizationHelper.localizeViewTree(sectionView, languageID)
+
+            val card = wrapInCard(sectionView)
+            container.addView(card)
+
+            val handler = createEmbeddedHandler(question)
+            handler?.bind(sectionView, question)
+            reduceTextSizes(sectionView)
+
+            sections.add(Section(idx, question, card, sectionView, handler))
+        }
+
+        installChangeListeners()
+        recalculateVisibility()
+
+        // Allow DB restores to finish before enabling interaction tracking
+        container.postDelayed({
+            setupComplete = true
+            recalculateVisibility()
+            updateSaveButtonState()
+        }, 600)
+
+        btnSave.setOnClickListener {
+            handleSave(progressBar)
+        }
+    }
+
+    private fun createEmbeddedHandler(question: QuestionItem): QuestionHandler? {
+        val noop = {}
+        val noopId: (String) -> Unit = {}
+        val toast: (String) -> Unit = { showToast(it) }
+        val metaId = questionnaireMeta.id
+
+        return when (question) {
+            is QuestionItem.RadioQuestion ->
+                com.dano.test1.questionnaire.handlers.HandlerRadioQuestion(
+                    context, answers, points, languageID, noop, noop, noopId, toast, metaId
+                )
+            is QuestionItem.ClientCoachCodeQuestion ->
+                com.dano.test1.questionnaire.handlers.HandlerClientCoachCode(
+                    answers, languageID, noop, noop, toast
+                )
+            is QuestionItem.DateSpinnerQuestion ->
+                com.dano.test1.questionnaire.handlers.HandlerDateSpinner(
+                    context, answers, languageID, noop, noop, toast, metaId
+                )
+            is QuestionItem.ValueSpinnerQuestion ->
+                com.dano.test1.questionnaire.handlers.HandlerValueSpinner(
+                    context, answers, languageID, noop, noop, noopId, toast, metaId
+                )
+            is QuestionItem.GlassScaleQuestion ->
+                com.dano.test1.questionnaire.handlers.HandlerGlassScaleQuestion(
+                    context, answers, points, languageID, noop, noop, toast, metaId
+                )
+            is QuestionItem.ClientNotSigned ->
+                com.dano.test1.questionnaire.handlers.HandlerClientNotSigned(
+                    answers, languageID, noop, noop, toast
+                )
+            is QuestionItem.StringSpinnerQuestion ->
+                com.dano.test1.questionnaire.handlers.HandlerStringSpinner(
+                    context, answers, languageID, noop, noop, toast, metaId
+                )
+            is QuestionItem.MultiCheckboxQuestion ->
+                com.dano.test1.questionnaire.handlers.HandlerMultiCheckboxQuestion(
+                    context, answers, points, languageID, noop, noop, toast, metaId
+                )
+            else -> null
+        }
+    }
+
+    private fun adaptLayoutForEmbedding(view: View) {
+        if (view is ConstraintLayout) {
+            view.layoutParams = LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                LinearLayout.LayoutParams.WRAP_CONTENT
+            )
+            // Ensure the last field in the card is never clipped at the bottom
+            view.setPadding(
+                view.paddingLeft, view.paddingTop,
+                view.paddingRight, ViewUtils.dp(context, 12)
+            )
+        }
+
+        view.findViewById<View>(R.id.Qprev)?.visibility = View.GONE
+        view.findViewById<View>(R.id.Qnext)?.visibility = View.GONE
+
+        view.findViewById<View>(R.id.gTop)?.let { guideline ->
+            if (guideline is androidx.constraintlayout.widget.Guideline) {
+                val params = guideline.layoutParams as? ConstraintLayout.LayoutParams
+                params?.guideBegin = ViewUtils.dp(context, 8)
+                guideline.layoutParams = params
+            }
+        }
+
+        adaptInnerScrollView(view, R.id.radioScroll)
+        adaptInnerScrollView(view, R.id.scrollView)
+        adaptInnerScrollView(view, R.id.glassScroll)
+
+        view.findViewById<EditText>(R.id.client_code)?.let { et ->
+            val params = et.layoutParams as? ConstraintLayout.LayoutParams ?: return@let
+            if (params.matchConstraintPercentHeight > 0f) {
+                params.matchConstraintPercentHeight = 0f
+                params.height = ViewUtils.dp(context, 64)
+                et.layoutParams = params
+            }
+        }
+        view.findViewById<EditText>(R.id.coach_code)?.let { et ->
+            val params = et.layoutParams as? ConstraintLayout.LayoutParams ?: return@let
+            if (params.matchConstraintPercentHeight > 0f) {
+                params.matchConstraintPercentHeight = 0f
+                params.height = ViewUtils.dp(context, 64)
+                et.layoutParams = params
+            }
+        }
+    }
+
+    /**
+     * Scales down all TextView text sizes by [factor] after the handler has set them.
+     * Spinners manage their own adapter text sizes and are skipped.
+     */
+    private fun reduceTextSizes(view: View, factor: Float = 0.82f) {
+        if (view is Spinner) return
+        if (view is TextView) {
+            val dm = view.context.resources.displayMetrics
+            val currentSp = view.textSize / dm.scaledDensity
+            view.setTextSize(TypedValue.COMPLEX_UNIT_SP, currentSp * factor)
+        }
+        if (view is ViewGroup) {
+            for (i in 0 until view.childCount) reduceTextSizes(view.getChildAt(i), factor)
+        }
+    }
+
+    private fun adaptInnerScrollView(root: View, scrollViewId: Int) {
+        val sv = root.findViewById<ScrollView>(scrollViewId) ?: return
+        val params = sv.layoutParams
+        if (params is ConstraintLayout.LayoutParams) {
+            params.height = ConstraintLayout.LayoutParams.WRAP_CONTENT
+            params.bottomToTop = ConstraintLayout.LayoutParams.UNSET
+            params.bottomToBottom = ConstraintLayout.LayoutParams.PARENT_ID
+            sv.layoutParams = params
+        }
+        sv.isNestedScrollingEnabled = false
+    }
+
+    private fun wrapInCard(sectionView: View): MaterialCardView {
+        val card = MaterialCardView(context).apply {
+            layoutParams = LinearLayout.LayoutParams(
+                LinearLayout.LayoutParams.MATCH_PARENT,
+                LinearLayout.LayoutParams.WRAP_CONTENT
+            ).apply {
+                val margin = ViewUtils.dp(context, 6)
+                setMargins(0, margin, 0, margin)
+            }
+            radius = ViewUtils.dp(context, 16).toFloat()
+            cardElevation = ViewUtils.dp(context, 2).toFloat()
+            setCardBackgroundColor(Color.WHITE)
+            strokeColor = Color.parseColor("#D8D1F0")
+            strokeWidth = ViewUtils.dp(context, 1)
+            setContentPadding(
+                ViewUtils.dp(context, 4),
+                ViewUtils.dp(context, 8),
+                ViewUtils.dp(context, 4),
+                ViewUtils.dp(context, 12)
+            )
+        }
+        card.addView(sectionView)
+        return card
+    }
+
+    // ---- Visibility walk algorithm (reads from UI state, not answers map) ----
+
+    private fun recalculateVisibility() {
+        val visibleIndices = mutableSetOf<Int>()
+        var i = 0
+
+        while (i < questions.size) {
+            val q = questions[i]
+            if (q is QuestionItem.LastPage) { i++; continue }
+
+            visibleIndices.add(i)
+
+            val nextTarget = resolveNextFromUi(q)
+            when {
+                nextTarget != null -> {
+                    if (questions.any { it is QuestionItem.LastPage && it.id == nextTarget }) {
+                        break
+                    }
+                    val targetIdx = questions.indexOfFirst { it.id == nextTarget }
+                    i = if (targetIdx != -1) targetIdx else i + 1
+                }
+                hasBranchingOptions(q) && !hasAnswerInUi(q) -> break
+                else -> i++
+            }
+        }
+
+        for (section in sections) {
+            val shouldShow = visibleIndices.contains(section.index)
+            section.card.visibility = if (shouldShow) View.VISIBLE else View.GONE
+        }
+    }
+
+    private fun resolveNextFromUi(q: QuestionItem): String? {
+        val section = sections.find { it.question === q } ?: return null
+        val view = section.sectionView
+
+        return when (q) {
+            is QuestionItem.RadioQuestion -> {
+                val radioGroup = view.findViewById<RadioGroup>(R.id.RadioGroup) ?: return null
+                val checkedId = radioGroup.checkedRadioButtonId
+                if (checkedId == -1) return null
+                val rb = radioGroup.findViewById<RadioButton>(checkedId) ?: return null
+                val key = rb.tag?.toString() ?: return null
+                q.options?.find { it.key == key }?.nextQuestionId
+            }
+            is QuestionItem.ValueSpinnerQuestion -> {
+                val spinner = view.findViewById<Spinner>(R.id.value_spinner) ?: return null
+                val selected = spinner.selectedItem?.toString() ?: return null
+                val prompt = LanguageManager.getText(languageID, "choose_answer")
+                if (selected == prompt) return null
+                val selectedVal = selected.toIntOrNull()
+                if (selectedVal != null) {
+                    q.options?.find { it.value == selectedVal }?.nextQuestionId
+                } else null
+            }
+            else -> null
+        }
+    }
+
+    private fun hasBranchingOptions(q: QuestionItem): Boolean {
+        return when (q) {
+            is QuestionItem.RadioQuestion ->
+                q.options?.any { it.nextQuestionId != null } ?: false
+            is QuestionItem.ValueSpinnerQuestion ->
+                q.options?.any { it.nextQuestionId != null } ?: false
+            else -> false
+        }
+    }
+
+    private fun hasAnswerInUi(q: QuestionItem): Boolean {
+        val section = sections.find { it.question === q } ?: return false
+        val view = section.sectionView
+
+        return when (q) {
+            is QuestionItem.RadioQuestion -> {
+                val rg = view.findViewById<RadioGroup>(R.id.RadioGroup) ?: return false
+                rg.checkedRadioButtonId != -1
+            }
+            is QuestionItem.ValueSpinnerQuestion -> {
+                val spinner = view.findViewById<Spinner>(R.id.value_spinner) ?: return false
+                val selected = spinner.selectedItem?.toString()
+                val prompt = LanguageManager.getText(languageID, "choose_answer")
+                !selected.isNullOrEmpty() && selected != prompt
+            }
+            else -> true
+        }
+    }
+
+    // ---- Change listeners ----
+
+    private fun installChangeListeners() {
+        for (section in sections) {
+            val view = section.sectionView
+
+            when (section.question) {
+                is QuestionItem.RadioQuestion -> {
+                    view.findViewById<RadioGroup>(R.id.RadioGroup)
+                        ?.setOnCheckedChangeListener { _, checkedId ->
+                            if (!setupComplete || checkedId == -1) return@setOnCheckedChangeListener
+                            recalculateVisibility()
+                            updateSaveButtonState()
+                        }
+                }
+                is QuestionItem.ValueSpinnerQuestion -> {
+                    installSpinnerChangeListener(view, R.id.value_spinner)
+                }
+                is QuestionItem.StringSpinnerQuestion -> {
+                    installSpinnerChangeListener(view, R.id.string_spinner)
+                }
+                is QuestionItem.DateSpinnerQuestion -> {
+                    val listener = createSimpleSpinnerListener()
+                    view.findViewById<Spinner>(R.id.spinner_value_day)?.onItemSelectedListener = listener
+                    view.findViewById<Spinner>(R.id.spinner_value_month)?.onItemSelectedListener = listener
+                    view.findViewById<Spinner>(R.id.spinner_value_year)?.onItemSelectedListener = listener
+                }
+                is QuestionItem.GlassScaleQuestion -> {
+                    installGlassScaleClickListeners(view)
+                }
+                is QuestionItem.MultiCheckboxQuestion -> {
+                    installCheckboxClickListeners(view)
+                }
+                is QuestionItem.ClientCoachCodeQuestion -> {
+                    installEditTextWatcher(view, R.id.client_code)
+                    installEditTextWatcher(view, R.id.coach_code)
+                }
+                is QuestionItem.ClientNotSigned -> {
+                    installEditTextWatcher(view, R.id.coach_code)
+                }
+                else -> {}
+            }
+        }
+    }
+
+    private fun installSpinnerChangeListener(view: View, spinnerId: Int) {
+        view.findViewById<Spinner>(spinnerId)?.onItemSelectedListener =
+            object : AdapterView.OnItemSelectedListener {
+                override fun onItemSelected(
+                    parent: AdapterView<*>?, v: View?, pos: Int, id: Long
+                ) {
+                    if (!setupComplete) return
+                    recalculateVisibility()
+                    updateSaveButtonState()
+                }
+                override fun onNothingSelected(parent: AdapterView<*>?) {}
+            }
+    }
+
+    private fun createSimpleSpinnerListener(): AdapterView.OnItemSelectedListener {
+        return object : AdapterView.OnItemSelectedListener {
+            override fun onItemSelected(parent: AdapterView<*>?, v: View?, pos: Int, id: Long) {
+                if (!setupComplete) return
+                updateSaveButtonState()
+            }
+            override fun onNothingSelected(parent: AdapterView<*>?) {}
+        }
+    }
+
+    private fun installGlassScaleClickListeners(view: View) {
+        val table = view.findViewById<TableLayout>(R.id.glass_table) ?: return
+        for (r in 0 until table.childCount) {
+            val row = table.getChildAt(r) as? TableRow ?: continue
+            val radioGroup = row.getChildAt(1) as? RadioGroup ?: continue
+            for (c in 0 until radioGroup.childCount) {
+                val rb = getRadioFromChild(radioGroup.getChildAt(c)) ?: continue
+                rb.setOnClickListener {
+                    if (setupComplete) updateSaveButtonState()
+                }
+            }
+        }
+    }
+
+    private fun getRadioFromChild(child: View): RadioButton? = when (child) {
+        is RadioButton -> child
+        is FrameLayout -> child.getChildAt(0) as? RadioButton
+        else -> null
+    }
+
+    private fun installCheckboxClickListeners(view: View) {
+        val cont = view.findViewById<LinearLayout>(R.id.CheckboxContainer) ?: return
+        for (i in 0 until cont.childCount) {
+            val cb = cont.getChildAt(i) as? CheckBox ?: continue
+            cb.setOnClickListener {
+                if (setupComplete) updateSaveButtonState()
+            }
+        }
+    }
+
+    private fun installEditTextWatcher(view: View, editTextId: Int) {
+        view.findViewById<EditText>(editTextId)?.addTextChangedListener(object : TextWatcher {
+            override fun beforeTextChanged(s: CharSequence?, start: Int, count: Int, after: Int) {}
+            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {}
+            override fun afterTextChanged(s: Editable?) {
+                if (!setupComplete) return
+                updateSaveButtonState()
+            }
+        })
+    }
+
+    // ---- Save button state ----
+
+    private fun updateSaveButtonState() {
+        val allValid = sections
+            .filter { it.card.visibility == View.VISIBLE }
+            .all { section ->
+                val handler = section.handler ?: return@all true
+                try { handler.validate() } catch (_: Exception) { false }
+            }
+        btnSave.isEnabled = allValid
+        btnSave.alpha = if (allValid) 1f else 0.5f
+    }
+
+    // ---- Save flow ----
+
+    private fun handleSave(progressBar: ProgressBar) {
+        val visibleSections = sections.filter { it.card.visibility == View.VISIBLE }
+
+        for (section in visibleSections) {
+            val handler = section.handler ?: continue
+            if (!handler.validate()) {
+                showToast(LanguageManager.getText(languageID, "fill_all_fields"))
+                scrollToSection(section)
+                return
+            }
+        }
+
+        for (section in visibleSections) {
+            if (section.question is QuestionItem.ClientCoachCodeQuestion) {
+                saveClientCoachCodeFromUi(section.sectionView)
+            }
+            section.handler?.saveAnswer()
+        }
+
+        showLoading(progressBar, true)
+
+        CoroutineScope(Dispatchers.IO).launch {
+            val startTime = System.currentTimeMillis()
+
+            saveAnswersToDatabase(answers, questionnaireMeta.id)
+
+            GlobalValues.INTEGRATION_INDEX = points.sum()
+            val clientCode = answers["client_code"] as? String
+            if (clientCode != null) {
+                GlobalValues.LAST_CLIENT_CODE = clientCode
+                GlobalValues.LOADED_CLIENT_CODE = clientCode
+            }
+
+            val elapsed = System.currentTimeMillis() - startTime
+            if (elapsed < 1500L) delay(1500L - elapsed)
+
+            withContext(Dispatchers.Main) {
+                showLoading(progressBar, false)
+                endQuestionnaire()
+            }
+        }
+    }
+
+    private fun saveClientCoachCodeFromUi(view: View) {
+        val clientCode = view.findViewById<EditText>(R.id.client_code)?.text?.toString() ?: ""
+        val coachCode = view.findViewById<EditText>(R.id.coach_code)?.text?.toString() ?: ""
+        GlobalValues.LAST_CLIENT_CODE = clientCode
+        answers["client_code"] = clientCode
+        answers["coach_code"] = TokenStore.getUsername(context) ?: coachCode
+    }
+
+    private fun showLoading(progressBar: ProgressBar, show: Boolean) {
+        progressBar.visibility = if (show) View.VISIBLE else View.GONE
+        btnSave.isEnabled = !show
+        btnSave.alpha = if (show) 0.5f else 1f
+    }
+
+    private fun scrollToSection(section: Section) {
+        val scrollView = context.findViewById<androidx.core.widget.NestedScrollView>(R.id.scrollContainer)
+        scrollView?.post {
+            scrollView.smoothScrollTo(0, section.card.top)
+        }
+    }
+}

app/src/main/java/com/dano/test1/questionnaire/QuestionnaireProgressiveCallbacks.kt

@@ -0,0 +1,9 @@
+package com.dano.test1.questionnaire
+
+object QuestionnaireProgressiveCallbacks {
+    @JvmStatic
+    fun maybeTrim(questionId: String?) {
+        // Intentional no-op: handlers call this during user interaction,
+        // but trimming is handled by each questionnaire variant itself.
+    }
+}

app/src/main/java/com/dano/test1/ui/AbTestSettingsStore.kt

@@ -0,0 +1,46 @@
+package com.dano.test1.ui
+
+import android.content.Context
+
+/**
+ * Persists dev-only A/B overrides. Not a security boundary; values are for local QA.
+ * Use [effectiveVariant] when branching questionnaire or remote-config logic.
+ */
+object AbTestSettingsStore {
+    private const val PREF = "dev_ab_settings"
+    private const val KEY_OVERRIDE = "override_enabled"
+    private const val KEY_VARIANT = "variant"
+
+    const val VARIANT_NONE = "NONE"
+    const val VARIANT_A = "A"
+    const val VARIANT_B = "B"
+
+    fun isOverrideEnabled(context: Context): Boolean =
+        context.getSharedPreferences(PREF, Context.MODE_PRIVATE).getBoolean(KEY_OVERRIDE, false)
+
+    fun setOverrideEnabled(context: Context, enabled: Boolean) {
+        context.getSharedPreferences(PREF, Context.MODE_PRIVATE).edit()
+            .putBoolean(KEY_OVERRIDE, enabled)
+            .apply()
+    }
+
+    fun getVariant(context: Context): String =
+        context.getSharedPreferences(PREF, Context.MODE_PRIVATE).getString(KEY_VARIANT, VARIANT_NONE)
+            ?: VARIANT_NONE
+
+    fun setVariant(context: Context, variant: String) {
+        context.getSharedPreferences(PREF, Context.MODE_PRIVATE).edit()
+            .putString(KEY_VARIANT, variant)
+            .apply()
+    }
+
+    /** Returns "A" or "B" when override is on and a branch is selected; otherwise null. */
+    fun effectiveVariant(context: Context): String? {
+        if (!isOverrideEnabled(context)) return null
+        return when (getVariant(context)) {
+            VARIANT_A -> "A"
+            VARIANT_B -> "B"
+            else -> null
+        }
+    }
+}

app/src/main/java/com/dano/test1/ui/DatabaseButtonHandler.kt

@@ -7,8 +7,8 @@ import android.view.View
 import android.widget.*
 import com.dano.test1.data.ExcelExportService
 import com.dano.test1.utils.ViewUtils
+import androidx.appcompat.app.AppCompatActivity
 import com.dano.test1.LanguageManager
-import com.dano.test1.MainActivity
 import com.dano.test1.MyApp
 import com.dano.test1.R
 import com.dano.test1.data.Client
@@ -19,7 +19,7 @@ import kotlinx.coroutines.*
 import org.json.JSONArray
 
 class DatabaseButtonHandler(
-    private val activity: MainActivity,
+    private val activity: AppCompatActivity,
     private val databaseButton: Button,
     private val onClose: () -> Unit,
     private val languageIDProvider: () -> String = { "GERMAN" }

app/src/main/java/com/dano/test1/ui/DevSettingsActivity.kt

@@ -0,0 +1,79 @@
+package com.dano.test1.ui
+
+import android.os.Bundle
+import android.widget.Button
+import android.widget.RadioButton
+import android.widget.RadioGroup
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.widget.SwitchCompat
+import androidx.appcompat.widget.Toolbar
+import com.dano.test1.R
+
+/**
+ * Dev-only A/B settings. Entry: client code [_dev_settings_] on the opening screen Load action.
+ * Not a security boundary (secret string is in the APK).
+ */
+class DevSettingsActivity : AppCompatActivity() {
+
+    private lateinit var switchOverride: SwitchCompat
+    private lateinit var radioGroup: RadioGroup
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_dev_settings)
+
+        val toolbar = findViewById<Toolbar>(R.id.devSettingsToolbar)
+        setSupportActionBar(toolbar)
+        supportActionBar?.setDisplayHomeAsUpEnabled(true)
+
+        switchOverride = findViewById(R.id.switchAbOverride)
+        radioGroup = findViewById(R.id.radioGroupVariant)
+
+        applyPrefsToUi()
+
+        switchOverride.setOnCheckedChangeListener { _, isChecked ->
+            AbTestSettingsStore.setOverrideEnabled(this, isChecked)
+            updateRadiosEnabled(isChecked)
+        }
+
+        radioGroup.setOnCheckedChangeListener { _, checkedId ->
+            val variant = when (checkedId) {
+                R.id.radioVariantA -> AbTestSettingsStore.VARIANT_A
+                R.id.radioVariantB -> AbTestSettingsStore.VARIANT_B
+                else -> AbTestSettingsStore.VARIANT_NONE
+            }
+            AbTestSettingsStore.setVariant(this, variant)
+        }
+
+        val databaseButton = findViewById<Button>(R.id.databaseButton)
+        DatabaseButtonHandler(
+            activity = this,
+            databaseButton = databaseButton,
+            onClose = { recreate() }
+        ).setup()
+    }
+
+    private fun applyPrefsToUi() {
+        val overrideOn = AbTestSettingsStore.isOverrideEnabled(this)
+        switchOverride.isChecked = overrideOn
+        updateRadiosEnabled(overrideOn)
+
+        when (AbTestSettingsStore.getVariant(this)) {
+            AbTestSettingsStore.VARIANT_A -> radioGroup.check(R.id.radioVariantA)
+            AbTestSettingsStore.VARIANT_B -> radioGroup.check(R.id.radioVariantB)
+            else -> radioGroup.check(R.id.radioVariantDefault)
+        }
+    }
+
+    private fun updateRadiosEnabled(enabled: Boolean) {
+        for (i in 0 until radioGroup.childCount) {
+            (radioGroup.getChildAt(i) as? RadioButton)?.isEnabled = enabled
+        }
+        radioGroup.alpha = if (enabled) 1f else 0.5f
+    }
+
+    override fun onSupportNavigateUp(): Boolean {
+        finish()
+        return true
+    }
+}

app/src/main/java/com/dano/test1/ui/EditButtonHandler.kt

@@ -1,97 +0,0 @@
-package com.dano.test1.ui
-
-import android.widget.Button
-import android.widget.EditText
-import android.widget.Toast
-import com.dano.test1.LanguageManager
-import com.dano.test1.MainActivity
-import com.dano.test1.MyApp
-import kotlinx.coroutines.*
-import com.dano.test1.data.CompletedQuestionnaire
-import com.dano.test1.questionnaire.GlobalValues
-
-class EditButtonHandler(
-    private val activity: MainActivity,
-    private val editButton: Button,
-    private val editText: EditText,
-    private val languageIDProvider: () -> String,
-    private val questionnaireFiles: Map<Button, String>,
-    private val buttonPoints: MutableMap<String, Int>,
-    private val updateButtonTexts: () -> Unit,
-    private val setButtonsEnabled: (List<Button>, Boolean) -> Unit,
-    private val setUiFreeze: (Boolean) -> Unit,
-    private val triggerLoad: () -> Unit
-) {
-
-    fun setup() {
-        editButton.text = LanguageManager.getText(languageIDProvider(), "edit")
-        editButton.setOnClickListener { handleEditButtonClick() }
-    }
-
-    private fun handleEditButtonClick() {
-        val typed = editText.text.toString().trim()
-        val desiredCode = when {
-            typed.isNotBlank() -> typed
-            !GlobalValues.LOADED_CLIENT_CODE.isNullOrBlank() -> GlobalValues.LOADED_CLIENT_CODE!!
-            else -> ""
-        }
-
-        if (desiredCode.isBlank()) {
-            val message = LanguageManager.getText(languageIDProvider(), "please_client_code")
-            Toast.makeText(activity, message, Toast.LENGTH_SHORT).show()
-            return
-        }
-
-        GlobalValues.LAST_CLIENT_CODE = desiredCode
-
-        val needLoad = GlobalValues.LOADED_CLIENT_CODE?.equals(desiredCode) != true
-        if (needLoad) {
-            setUiFreeze(true)  // Zwischenzustände unterdrücken
-            triggerLoad()
-        }
-
-        CoroutineScope(Dispatchers.IO).launch {
-            val loadedOk = waitUntilClientLoaded(desiredCode, timeoutMs = 2500, stepMs = 50)
-            if (!loadedOk) {
-                withContext(Dispatchers.Main) {
-                    val msg = LanguageManager.getText(languageIDProvider(), "open_client_via_load")
-                    Toast.makeText(activity, msg, Toast.LENGTH_LONG).show()
-                    setUiFreeze(false)
-                }
-                return@launch
-            }
-
-            val completedEntries: List<CompletedQuestionnaire> =
-                MyApp.database.completedQuestionnaireDao().getAllForClient(desiredCode)
-
-            val completedFiles = completedEntries.filter { it.isDone }.map { it.questionnaireId.lowercase() }
-
-            buttonPoints.clear()
-            for (entry in completedEntries) {
-                if (entry.isDone) {
-                    buttonPoints[entry.questionnaireId] = entry.sumPoints ?: 0
-                }
-            }
-
-            withContext(Dispatchers.Main) {
-                updateButtonTexts()
-                val enabledButtons = questionnaireFiles.filter { (_, fileName) ->
-                    completedFiles.any { completedId -> fileName.lowercase().contains(completedId) }
-                }.keys.toList()
-                setButtonsEnabled(enabledButtons, true)
-                setUiFreeze(false)
-            }
-        }
-    }
-
-    private suspend fun waitUntilClientLoaded(expectedCode: String, timeoutMs: Long, stepMs: Long): Boolean {
-        if (GlobalValues.LOADED_CLIENT_CODE?.equals(expectedCode) == true) return true
-        var waited = 0L
-        while (waited < timeoutMs) {
-            delay(stepMs)
-            waited += stepMs
-            if (GlobalValues.LOADED_CLIENT_CODE?.equals(expectedCode) == true) return true
-        }
-        return GlobalValues.LOADED_CLIENT_CODE?.equals(expectedCode) == true
-    }
-}

app/src/main/java/com/dano/test1/ui/HandlerOpeningScreen.kt

@@ -20,6 +20,7 @@ import com.dano.test1.network.TokenStore
 import com.dano.test1.questionnaire.GlobalValues
 import com.dano.test1.questionnaire.QuestionItem
 import com.dano.test1.questionnaire.QuestionnaireBase
+import com.dano.test1.questionnaire.QuestionnaireAllInOne
 import com.dano.test1.questionnaire.QuestionnaireGeneric
 import com.google.android.material.button.MaterialButton
 import org.json.JSONArray
@@ -42,10 +43,8 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
     private lateinit var buttonContainer: LinearLayout
     private lateinit var buttonLoad: Button
     private lateinit var saveButton: Button
-    private lateinit var editButton: Button
     private lateinit var uploadButton: Button
     private lateinit var downloadButton: Button
-    private lateinit var databaseButton: Button
     private lateinit var statusSession: TextView
     private lateinit var statusOnline: TextView
     private val SESSION_WARN_AFTER_MS = 12 * 60 * 60 * 1000L // 12h
@@ -94,10 +93,8 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
         setupLanguageSpinner()
         setupLoadButton()
         setupSaveButton()
-        setupEditButtonHandler()
         setupUploadButton()
         setupDownloadButton()
-        setupDatabaseButtonHandler()
 
         uiHandler.removeCallbacks(statusTicker)
         updateStatusStrip()
@@ -123,13 +120,11 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
         buttonContainer = activity.findViewById(R.id.buttonContainer)
         buttonLoad = activity.findViewById(R.id.loadButton)
         saveButton = activity.findViewById(R.id.saveButton)
-        editButton = activity.findViewById(R.id.editButton)
         uploadButton = activity.findViewById(R.id.uploadButton)
 
         downloadButton = activity.findViewById(R.id.downloadButton)
         downloadButton.visibility = View.GONE
 
-        databaseButton = activity.findViewById(R.id.databaseButton)
         statusSession = activity.findViewById(R.id.statusSession)
         statusOnline = activity.findViewById(R.id.statusOnline)
         val tag = editText.tag as? String ?: ""
@@ -231,7 +226,12 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
                 setOnClickListener {
                     GlobalValues.LAST_CLIENT_CODE = GlobalValues.LOADED_CLIENT_CODE
                     val fileName = questionnaireFiles[this] ?: return@setOnClickListener
-                    val questionnaire = QuestionnaireGeneric(fileName)
+                    val variant = AbTestSettingsStore.effectiveVariant(activity)
+                    val questionnaire: QuestionnaireBase<*> = if (variant == "B") {
+                        QuestionnaireAllInOne(fileName)
+                    } else {
+                        QuestionnaireGeneric(fileName)
+                    }
                     startQuestionnaire(questionnaire)
                     applySetButtonsEnabled(dynamicButtons.filter { it == this }, allowCompleted = false, force = false)
                 }
@@ -331,7 +331,7 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
             dynamicButtonsProvider = { dynamicButtons },
             buttonPoints = buttonPoints,
             updateButtonTexts = { applyUpdateButtonTexts(force = false) },
-            setButtonsEnabled = { list -> applySetButtonsEnabled(list, allowCompleted = false, force = false) },
+            setButtonsEnabled = { list -> applySetButtonsEnabled(list, allowCompleted = true, force = false) },
             updateMainButtonsState = { updateMainButtonsState(it) },
         ).setup()
     }
@@ -387,10 +387,8 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
         }
         buttonLoad.text     = t("load")
         saveButton.text     = t("save")
-        editButton.text     = t("edit")
         uploadButton.text   = t("upload")
         downloadButton.text = t("download")
-        databaseButton.text = t("database")
         val hintTag = editText.tag as? String ?: ""
         editText.hint = t(hintTag)
         val coachTag = coachEditText.tag as? String ?: ""
@@ -455,23 +453,6 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
         ).setup()
     }
 
-    private fun setupEditButtonHandler() {
-        EditButtonHandler(
-            activity = activity,
-            editButton = editButton,
-            editText = editText,
-            languageIDProvider = { languageID },
-            questionnaireFiles = questionnaireFiles,
-            buttonPoints = buttonPoints,
-            updateButtonTexts = { applyUpdateButtonTexts(force = true) },
-            setButtonsEnabled = { list, allowCompleted ->
-                applySetButtonsEnabled(list, allowCompleted, force = true)
-            },
-            setUiFreeze = { freeze -> uiFreeze = freeze },
-            triggerLoad = { buttonLoad.performClick() }
-        ).setup()
-    }
-
     private fun setupUploadButton() {
         uploadButton.text = t("upload")
         uploadButton.setOnClickListener {
@@ -533,17 +514,8 @@ class HandlerOpeningScreen(private val activity: MainActivity) {
         }
     }
 
-    private fun setupDatabaseButtonHandler() {
-        DatabaseButtonHandler(
-            activity = activity,
-            databaseButton = databaseButton,
-            onClose = { init() },
-            languageIDProvider = { languageID }
-        ).setup()
-    }
-
     private fun updateMainButtonsState(isDatabaseAvailable: Boolean) {
-        listOf(buttonLoad, saveButton, editButton, databaseButton).forEach { b ->
+        listOf(buttonLoad, saveButton).forEach { b ->
             b.isEnabled = isDatabaseAvailable
             b.alpha = if (isDatabaseAvailable) 1.0f else 0.5f
         }

app/src/main/java/com/dano/test1/ui/LoadButtonHandler.kt

@@ -1,5 +1,6 @@
 package com.dano.test1.ui
 
+import android.content.Intent
 import android.widget.Button
 import android.widget.EditText
 import android.widget.Toast
@@ -24,6 +25,11 @@ class LoadButtonHandler(
     private val updateMainButtonsState: (Boolean) -> Unit,
 ) {
 
+    companion object {
+        /** Opening-screen client code that opens dev A/B settings (not a security boundary). */
+        private const val DEV_SETTINGS_SECRET = "_dev_settings_"
+    }
+
     fun setup() {
         loadButton.text = LanguageManager.getText(languageIDProvider(), "load")
         loadButton.setOnClickListener { handleLoadButton() }
@@ -37,6 +43,12 @@ class LoadButtonHandler(
             return
         }
 
+        if (inputText == DEV_SETTINGS_SECRET) {
+            editText.text.clear()
+            activity.startActivity(Intent(activity, DevSettingsActivity::class.java))
+            return
+        }
+
         buttonPoints.clear()
         setButtonsEnabled(emptyList())   // temporär sperren
         updateButtonTexts()              // Chips zeigen vorläufig „Gesperrt“
@@ -148,10 +160,9 @@ class LoadButtonHandler(
                     (completedNorm.contains(targetNorm) || targetNorm.contains(completedNorm)) && completed.isDone
                 }
             }
-            if (isCompleted) continue
 
             val condMet = evaluateCondition(entry.condition, clientCode, completedEntries)
-            if (condMet) enabledButtons.add(button)
+            if (condMet || isCompleted) enabledButtons.add(button)
         }
 
         withContext(Dispatchers.Main) {

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

@@ -0,0 +1,96 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <androidx.appcompat.widget.Toolbar
+        android:id="@+id/devSettingsToolbar"
+        android:layout_width="match_parent"
+        android:layout_height="?attr/actionBarSize"
+        android:background="?attr/colorPrimary"
+        app:title="A/B testing (dev)"
+        app:titleTextColor="@android:color/white" />
+
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:fillViewport="true">
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:padding="16dp">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingBottom="8dp"
+                android:text="Manual A/B override for local testing. Not a security boundary."
+                android:textSize="14sp" />
+
+            <androidx.appcompat.widget.SwitchCompat
+                android:id="@+id/switchAbOverride"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingVertical="8dp"
+                android:text="Manual A/B override" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingTop="16dp"
+                android:paddingBottom="8dp"
+                android:text="Variant"
+                android:textStyle="bold" />
+
+            <RadioGroup
+                android:id="@+id/radioGroupVariant"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="vertical">
+
+                <RadioButton
+                    android:id="@+id/radioVariantDefault"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:text="Default (no override)" />
+
+                <RadioButton
+                    android:id="@+id/radioVariantA"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:text="Variant A" />
+
+                <RadioButton
+                    android:id="@+id/radioVariantB"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:text="Variant B" />
+            </RadioGroup>
+
+            <View
+                android:layout_width="match_parent"
+                android:layout_height="1dp"
+                android:layout_marginTop="24dp"
+                android:layout_marginBottom="16dp"
+                android:background="#DDDDDD" />
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:paddingBottom="8dp"
+                android:text="Database"
+                android:textStyle="bold" />
+
+            <Button
+                android:id="@+id/databaseButton"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:text="Datenbank" />
+
+        </LinearLayout>
+    </ScrollView>
+</LinearLayout>

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

@@ -195,21 +195,6 @@
             app:cornerRadius="@dimen/pill_radius"
             app:backgroundTint="@color/brand_purple"/>
 
-        <com.google.android.material.button.MaterialButton
-            android:id="@+id/editButton"
-            android:layout_width="0dp"
-            android:layout_height="@dimen/pill_height"
-            android:layout_weight="1"
-            android:layout_marginEnd="12dp"
-            android:textAllCaps="false"
-            android:textColor="@android:color/white"
-            app:icon="@drawable/ic_dot_16"
-            app:iconTint="@android:color/white"
-            app:iconPadding="8dp"
-            app:iconGravity="textStart"
-            app:cornerRadius="@dimen/pill_radius"
-            app:backgroundTint="@color/brand_purple"/>
-
         <com.google.android.material.button.MaterialButton
             android:id="@+id/saveButton"
             android:layout_width="0dp"
@@ -253,19 +238,6 @@
             style="@style/Widget.MaterialComponents.Button.OutlinedButton"
             android:layout_width="match_parent"
             android:layout_height="@dimen/pill_height"
-            android:layout_marginBottom="12dp"
-            android:textAllCaps="false"
-            android:textColor="@color/brand_purple"
-            app:cornerRadius="@dimen/pill_radius"
-            app:strokeColor="@color/brand_purple"
-            app:strokeWidth="@dimen/pill_stroke"
-            app:backgroundTint="@android:color/transparent"/>
-
-        <com.google.android.material.button.MaterialButton
-            android:id="@+id/databaseButton"
-            style="@style/Widget.MaterialComponents.Button.OutlinedButton"
-            android:layout_width="match_parent"
-            android:layout_height="@dimen/pill_height"
             android:textAllCaps="false"
             android:textColor="@color/brand_purple"
             app:cornerRadius="@dimen/pill_radius"

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

@@ -0,0 +1,71 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/btnBack"
+        android:layout_width="@dimen/nav_btn_size"
+        android:layout_height="@dimen/nav_btn_size"
+        android:layout_marginStart="12dp"
+        android:layout_marginTop="12dp"
+        android:text=""
+        android:textAllCaps="false"
+        app:icon="@drawable/ic_chevron_left"
+        app:iconTint="@color/btn_nav_left_icon_tint"
+        app:iconSize="@dimen/nav_icon_size"
+        app:iconPadding="0dp"
+        app:cornerRadius="999dp"
+        app:backgroundTint="@color/btn_nav_left_tint"
+        app:rippleColor="@color/btn_nav_left_ripple" />
+
+    <androidx.core.widget.NestedScrollView
+        android:id="@+id/scrollContainer"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_weight="1"
+        android:fillViewport="true"
+        android:clipToPadding="false"
+        android:paddingBottom="16dp">
+
+        <LinearLayout
+            android:id="@+id/questionContainer"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical"
+            android:paddingStart="12dp"
+            android:paddingEnd="12dp"
+            android:paddingTop="8dp" />
+    </androidx.core.widget.NestedScrollView>
+
+    <FrameLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="12dp"
+        android:background="@android:color/white"
+        android:elevation="8dp">
+
+        <com.google.android.material.button.MaterialButton
+            android:id="@+id/btnSave"
+            android:layout_width="match_parent"
+            android:layout_height="@dimen/nav_btn_size"
+            android:textAllCaps="false"
+            android:minWidth="0dp"
+            android:insetLeft="0dp"
+            android:insetRight="0dp"
+            app:cornerRadius="999dp"
+            app:backgroundTint="@color/btn_nav_right_tint"
+            app:rippleColor="@color/btn_nav_right_ripple" />
+
+        <ProgressBar
+            android:id="@+id/progressBar"
+            style="?android:attr/progressBarStyle"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_gravity="center"
+            android:visibility="gone" />
+    </FrameLayout>
+
+</LinearLayout>