From 1b133d1e4bf55282e3fdcecfb08764fcbf35948c Mon Sep 17 00:00:00 2001
From: Young-Six-6 <wzh0456@gmail.com>
Date: Tue, 9 Jun 2026 15:28:05 +0800
Subject: [PATCH] build nfc

---
 .../main/java/mba/vm/onhit/ui/MainActivity.kt | 254 ++++++++++++++++++
 .../drawable-v21/bg_button_text_ripple.xml    |  12 +
 .../res/drawable/bg_button_text_ripple.xml    |  18 ++
 .../res/layout/bottom_sheet_build_ndef.xml    | 146 ++++++++++
 app/src/main/res/values-zh/strings.xml        |  29 ++
 app/src/main/res/values/strings.xml           |  31 ++-
 6 files changed, 489 insertions(+), 1 deletion(-)
 create mode 100644 app/src/main/res/drawable-v21/bg_button_text_ripple.xml
 create mode 100644 app/src/main/res/drawable/bg_button_text_ripple.xml
 create mode 100644 app/src/main/res/layout/bottom_sheet_build_ndef.xml

diff --git a/app/src/main/java/mba/vm/onhit/ui/MainActivity.kt b/app/src/main/java/mba/vm/onhit/ui/MainActivity.kt
index a764f4c..a0ef79d 100644
--- a/app/src/main/java/mba/vm/onhit/ui/MainActivity.kt
+++ b/app/src/main/java/mba/vm/onhit/ui/MainActivity.kt
@@ -3,6 +3,8 @@ package mba.vm.onhit.ui
 import android.app.Activity
 import android.content.Intent
 import android.net.Uri
+import android.nfc.NdefMessage
+import android.nfc.NdefRecord
 import android.os.Build
 import android.os.Bundle
 import android.os.Parcel
@@ -12,6 +14,11 @@ import android.view.View
 import android.view.WindowInsets
 import android.view.inputmethod.InputMethodManager
 import android.widget.PopupMenu
+import android.widget.ArrayAdapter
+import android.widget.Button
+import android.widget.EditText
+import android.widget.Spinner
+import android.widget.TextView
 import android.widget.Toast
 import android.window.OnBackInvokedDispatcher
 import androidx.core.content.IntentCompat
@@ -326,6 +333,7 @@ class MainActivity : Activity() {
     private fun showAddPopupMenu(view: View) {
         val popup = PopupMenu(this, view)
         popup.menu.add(0, 1, 0, R.string.menu_add_folder)
+        popup.menu.add(0, 3, 1, R.string.menu_build_ndef)
         if (nfcHandler.isEnabled() &&
             pendingImportUri == null) popup.menu.add(0, 2, 2, R.string.import_ndef)
 
@@ -336,12 +344,258 @@ class MainActivity : Activity() {
                     refreshCurrentDir()
                 }
                 2 -> nfcHandler.startRead()
+                3 -> showBuildNdefDialog()
             }
             true
         }
         popup.show()
     }
 
+
+    private fun showBuildNdefDialog() {
+        val dialog = DialogHelper.createBottomDialog(
+            this,
+            R.layout.bottom_sheet_build_ndef
+        )
+
+        data class BuiltRecord(
+            val type: String,
+            val value: String,
+            val record: NdefRecord
+        )
+
+        val builtRecords = mutableListOf<BuiltRecord>()
+
+        val spinner = dialog.findViewById<Spinner>(R.id.spinner_ndef_type)
+        val input = dialog.findViewById<EditText>(R.id.et_ndef_value)
+        val btnAddRecord = dialog.findViewById<Button>(R.id.btn_add_ndef_record)
+        val btnClearRecords = dialog.findViewById<Button>(R.id.btn_clear_ndef_records)
+        val tvRecordCount = dialog.findViewById<TextView>(R.id.tv_ndef_record_count)
+        val tvRecordList = dialog.findViewById<TextView>(R.id.tv_ndef_record_list)
+        val btnOk = dialog.findViewById<Button>(R.id.btn_ndef_ok)
+        val btnCancel = dialog.findViewById<Button>(R.id.btn_ndef_cancel)
+
+        val types = listOf(
+            getString(R.string.build_ndef_type_website),
+            getString(R.string.build_ndef_type_phone),
+            getString(R.string.build_ndef_type_text)
+        )
+
+        spinner.adapter = ArrayAdapter(
+            this,
+            android.R.layout.simple_spinner_item,
+            types
+        ).apply {
+            setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item)
+        }
+
+        fun ntagHint(size: Int): String {
+            return when {
+                size <= 0 -> ""
+                size <= 144 -> getString(R.string.build_ndef_ntag_213)
+                size <= 504 -> getString(R.string.build_ndef_ntag_215_216)
+                size <= 888 -> getString(R.string.build_ndef_ntag_216)
+                else -> getString(R.string.build_ndef_ntag_too_large)
+            }
+        }
+
+        fun refreshRecordList() {
+            val bytesSize = if (builtRecords.isEmpty()) {
+                0
+            } else {
+                buildNdefBytes(builtRecords.map { it.record }).size
+            }
+
+            tvRecordCount.text = getString(
+                R.string.build_ndef_record_status,
+                builtRecords.size,
+                bytesSize,
+                ntagHint(bytesSize)
+            )
+
+            tvRecordList.text = if (builtRecords.isEmpty()) {
+                getString(R.string.build_ndef_empty_records)
+            } else {
+                builtRecords.mapIndexed { index, item ->
+                    getString(
+                        R.string.build_ndef_record_item,
+                        index + 1,
+                        item.type,
+                        item.value
+                    )
+                }.joinToString("\n")
+            }
+        }
+
+        fun addCurrentRecord(): Boolean {
+            val type = spinner.selectedItem.toString()
+            val value = input.text.toString().trim()
+
+            if (value.isEmpty()) {
+                Toast.makeText(
+                    this,
+                    R.string.build_ndef_error_empty_value,
+                    Toast.LENGTH_SHORT
+                ).show()
+                return false
+            }
+
+            return try {
+                val record = buildNdefRecord(type, value)
+                builtRecords.add(
+                    BuiltRecord(
+                        type = type,
+                        value = value,
+                        record = record
+                    )
+                )
+                input.setText("")
+                refreshRecordList()
+                true
+            } catch (e: Exception) {
+                Toast.makeText(
+                    this,
+                    getString(
+                        R.string.build_ndef_error_add_failed,
+                        e.message ?: getString(R.string.unknown_error)
+                    ),
+                    Toast.LENGTH_SHORT
+                ).show()
+                false
+            }
+        }
+
+        btnAddRecord.setOnClickListener {
+            addCurrentRecord()
+        }
+
+        btnClearRecords.setOnClickListener {
+            builtRecords.clear()
+            refreshRecordList()
+        }
+
+        btnCancel.setOnClickListener {
+            dialog.dismiss()
+        }
+
+        btnOk.setOnClickListener {
+            if (input.text.toString().trim().isNotEmpty()) {
+                if (!addCurrentRecord()) return@setOnClickListener
+            }
+
+            if (builtRecords.isEmpty()) {
+                Toast.makeText(
+                    this,
+                    R.string.build_ndef_error_empty_records,
+                    Toast.LENGTH_SHORT
+                ).show()
+                return@setOnClickListener
+            }
+
+            try {
+                val bytes = buildNdefBytes(builtRecords.map { it.record })
+                saveBuiltNdef(bytes)
+                dialog.dismiss()
+            } catch (e: Exception) {
+                Toast.makeText(
+                    this,
+                    getString(
+                        R.string.build_ndef_error_build_failed,
+                        e.message ?: getString(R.string.unknown_error)
+                    ),
+                    Toast.LENGTH_SHORT
+                ).show()
+            }
+        }
+
+        refreshRecordList()
+        dialog.show()
+    }
+
+    private fun buildNdefRecord(type: String, value: String): NdefRecord {
+        return when (type) {
+            getString(R.string.build_ndef_type_website) -> {
+                val url = if (
+                    value.startsWith("http://", ignoreCase = true) ||
+                    value.startsWith("https://", ignoreCase = true)
+                ) {
+                    value
+                } else {
+                    "https://$value"
+                }
+                NdefRecord.createUri(url)
+            }
+
+            getString(R.string.build_ndef_type_phone) -> {
+                val phone = value.replace(" ", "")
+                NdefRecord.createUri("tel:$phone")
+            }
+
+            else -> {
+                createTextRecord(getCurrentNdefTextLanguage(), value)
+            }
+        }
+    }
+
+    private fun buildNdefBytes(records: List<NdefRecord>): ByteArray {
+        return NdefMessage(records.toTypedArray()).toByteArray()
+    }
+
+    private fun getCurrentNdefTextLanguage(): String {
+        val language = Locale.getDefault().language
+        return language.ifBlank { "en" }
+    }
+
+    private fun createTextRecord(language: String, text: String): NdefRecord {
+        val languageBytes = language.toByteArray(Charsets.US_ASCII)
+        val textBytes = text.toByteArray(Charsets.UTF_8)
+        val payload = ByteArray(1 + languageBytes.size + textBytes.size)
+
+        payload[0] = languageBytes.size.toByte()
+        System.arraycopy(languageBytes, 0, payload, 1, languageBytes.size)
+        System.arraycopy(textBytes, 0, payload, 1 + languageBytes.size, textBytes.size)
+
+        return NdefRecord(
+            NdefRecord.TNF_WELL_KNOWN,
+            NdefRecord.RTD_TEXT,
+            ByteArray(0),
+            payload
+        )
+    }
+
+    private fun saveBuiltNdef(bytes: ByteArray) {
+        val dir = currentDir ?: run {
+            Toast.makeText(this, R.string.path_not_selected, Toast.LENGTH_SHORT).show()
+            return
+        }
+
+        val fileName =
+            SimpleDateFormat("yyyy-MM-dd_HH-mm-ss", Locale.getDefault())
+                .format(Date()) + "_built.ndef"
+
+        val file = dir.createFile("application/octet-stream", fileName)
+        val uri = file?.uri ?: run {
+            Toast.makeText(
+                this,
+                R.string.build_ndef_error_create_file_failed,
+                Toast.LENGTH_SHORT
+            ).show()
+            return
+        }
+
+        contentResolver.openOutputStream(uri)?.use {
+            it.write(bytes)
+        }
+
+        Toast.makeText(
+            this,
+            getString(R.string.build_ndef_saved, fileName),
+            Toast.LENGTH_SHORT
+        ).show()
+
+        refreshCurrentDir()
+    }
+
     private fun showNdefSaveDialog(data: ByteArray) {
         val defaultName = SimpleDateFormat("yyyy-MM-dd_HH-mm-ss", Locale.getDefault()).format(Date()) + ".ndef"
         DialogHelper.showInputBottomSheet(this, getString(R.string.dialog_title_save_ndef), defaultName) { name ->
diff --git a/app/src/main/res/drawable-v21/bg_button_text_ripple.xml b/app/src/main/res/drawable-v21/bg_button_text_ripple.xml
new file mode 100644
index 0000000..2d1772c
--- /dev/null
+++ b/app/src/main/res/drawable-v21/bg_button_text_ripple.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ripple xmlns:android="http://schemas.android.com/apk/res/android"
+    android:color="#334A6CFF">
+
+    <item android:id="@android:id/mask">
+        <shape>
+            <corners android:radius="28dp" />
+            <solid android:color="@android:color/white" />
+        </shape>
+    </item>
+
+</ripple>
\ No newline at end of file
diff --git a/app/src/main/res/drawable/bg_button_text_ripple.xml b/app/src/main/res/drawable/bg_button_text_ripple.xml
new file mode 100644
index 0000000..4e6ad49
--- /dev/null
+++ b/app/src/main/res/drawable/bg_button_text_ripple.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<selector xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item android:state_pressed="true">
+        <shape>
+            <corners android:radius="28dp" />
+            <solid android:color="#334A6CFF" />
+        </shape>
+    </item>
+
+    <item>
+        <shape>
+            <corners android:radius="28dp" />
+            <solid android:color="@android:color/transparent" />
+        </shape>
+    </item>
+
+</selector>
\ No newline at end of file
diff --git a/app/src/main/res/layout/bottom_sheet_build_ndef.xml b/app/src/main/res/layout/bottom_sheet_build_ndef.xml
new file mode 100644
index 0000000..6178986
--- /dev/null
+++ b/app/src/main/res/layout/bottom_sheet_build_ndef.xml
@@ -0,0 +1,146 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:background="@drawable/bg_bottom_sheet">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="vertical"
+        android:padding="24dp">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/build_ndef_title"
+            android:textSize="20sp"
+            android:textStyle="bold"
+            android:textColor="?android:attr/textColorPrimary"
+            android:layout_marginBottom="16dp" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/build_ndef_type"
+            android:textSize="14sp"
+            android:textColor="?android:attr/textColorSecondary"
+            android:layout_marginBottom="6dp" />
+
+        <Spinner
+            android:id="@+id/spinner_ndef_type"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content" />
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="@string/build_ndef_value"
+            android:textSize="14sp"
+            android:textColor="?android:attr/textColorSecondary"
+            android:layout_marginTop="16dp"
+            android:layout_marginBottom="6dp" />
+
+        <EditText
+            android:id="@+id/et_ndef_value"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="@string/build_ndef_value_hint"
+            android:inputType="textMultiLine"
+            android:minLines="1"
+            android:maxLines="4"
+            android:importantForAutofill="no" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:gravity="end"
+            android:layout_marginTop="12dp">
+
+            <Button
+                android:id="@+id/btn_add_ndef_record"
+                android:layout_width="wrap_content"
+                android:layout_height="44dp"
+                android:minWidth="112dp"
+                android:paddingHorizontal="24dp"
+                android:background="@drawable/bg_button_text_ripple"
+                android:text="@string/build_ndef_add_record"
+                android:textSize="15sp"
+                android:textColor="#DCE4FF"
+                android:stateListAnimator="@null"
+                android:textAllCaps="false" />
+
+            <Button
+                android:id="@+id/btn_clear_ndef_records"
+                android:layout_width="wrap_content"
+                android:layout_height="48dp"
+                android:minWidth="96dp"
+                android:layout_marginStart="12dp"
+                android:paddingHorizontal="24dp"
+                android:background="@drawable/bg_button_text_ripple"
+                android:text="@string/build_ndef_clear_records"
+                android:textSize="16sp"
+                android:textColor="#DCE4FF"
+                android:stateListAnimator="@null"
+                android:textAllCaps="false" />
+        </LinearLayout>
+
+        <TextView
+            android:id="@+id/tv_ndef_record_count"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text=""
+            android:textSize="13sp"
+            android:textColor="?android:attr/textColorSecondary"
+            android:layout_marginTop="18dp" />
+
+        <TextView
+            android:id="@+id/tv_ndef_record_list"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:minHeight="72dp"
+            android:layout_marginTop="8dp"
+            android:padding="12dp"
+            android:text="@string/build_ndef_empty_records"
+            android:textSize="14sp"
+            android:textColor="?android:attr/textColorSecondary"
+            android:background="?android:attr/colorBackground" />
+
+        <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:gravity="end"
+            android:orientation="horizontal"
+            android:layout_marginTop="24dp">
+
+            <Button
+                android:id="@+id/btn_ndef_cancel"
+                android:layout_width="wrap_content"
+                android:layout_height="48dp"
+                android:minWidth="96dp"
+                android:paddingHorizontal="24dp"
+                android:background="@drawable/bg_button_text_ripple"
+                android:text="@android:string/cancel"
+                android:textSize="16sp"
+                android:textColor="#DCE4FF"
+                android:stateListAnimator="@null"
+                android:textAllCaps="false" />
+
+            <Button
+                android:id="@+id/btn_ndef_ok"
+                android:layout_width="wrap_content"
+                android:layout_height="48dp"
+                android:minWidth="96dp"
+                android:layout_marginStart="12dp"
+                android:paddingHorizontal="24dp"
+                android:background="@drawable/bg_button_text_ripple"
+                android:text="@string/build_ndef_generate"
+                android:textSize="16sp"
+                android:textColor="#DCE4FF"
+                android:stateListAnimator="@null"
+                android:textAllCaps="false" />
+        </LinearLayout>
+
+    </LinearLayout>
+</ScrollView>
\ No newline at end of file
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index dc4e837..0c352a6 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -57,4 +57,33 @@
     <string name="settings_background_default">当前使用默认背景</string>
     <string name="settings_background_custom">当前使用自定义背景</string>
     <string name="unknown_error">未知错误</string>
+
+    <string name="menu_build_ndef">构建 NDEF （beta）</string>
+
+    <string name="build_ndef_title">构建 NDEF （beta）</string>
+    <string name="build_ndef_type">类别</string>
+    <string name="build_ndef_value">记录值</string>
+    <string name="build_ndef_value_hint">记录值</string>
+    <string name="build_ndef_add_record">添加记录</string>
+    <string name="build_ndef_clear_records">清空</string>
+    <string name="build_ndef_generate">生成</string>
+    <string name="build_ndef_empty_records">暂无记录</string>
+    <string name="build_ndef_record_status">记录数：%1$d，NDEF大小：%2$d bytes%3$s</string>
+    <string name="build_ndef_record_item">%1$d. %2$s：%3$s</string>
+
+    <string name="build_ndef_type_website">网站</string>
+    <string name="build_ndef_type_phone">电话</string>
+    <string name="build_ndef_type_text">文本</string>
+
+    <string name="build_ndef_error_empty_value">记录值不能为空</string>
+    <string name="build_ndef_error_add_failed">添加记录失败：%s</string>
+    <string name="build_ndef_error_empty_records">请至少添加一条记录</string>
+    <string name="build_ndef_error_build_failed">构建 NDEF 失败：%s</string>
+    <string name="build_ndef_error_create_file_failed">创建 NDEF 文件失败</string>
+    <string name="build_ndef_saved">已创建：%s</string>
+
+    <string name="build_ndef_ntag_213">，约可放入 NTAG213</string>
+    <string name="build_ndef_ntag_215_216">，约需 NTAG215/216</string>
+    <string name="build_ndef_ntag_216">，约需 NTAG216</string>
+    <string name="build_ndef_ntag_too_large">，可能超过常见 NTAG 容量</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index e689f7b..ec73067 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -57,5 +57,34 @@
     <string name="settings_clear_background">Clear background image</string>
     <string name="settings_background_default">Using default background</string>
     <string name="settings_background_custom">Using custom background</string>
-    <string name="unknown_error">unknown error</string>
+    <string name="unknown_error">unknow error</string>
+
+    <string name="menu_build_ndef">Build NDEF(beta)</string>
+
+    <string name="build_ndef_title">Build NDEF(beta)</string>
+    <string name="build_ndef_type">Type</string>
+    <string name="build_ndef_value">Value</string>
+    <string name="build_ndef_value_hint">Enter website, phone number or text</string>
+    <string name="build_ndef_add_record">Add record</string>
+    <string name="build_ndef_clear_records">Clear</string>
+    <string name="build_ndef_generate">Generate</string>
+    <string name="build_ndef_empty_records">No records</string>
+    <string name="build_ndef_record_status">Records: %1$d, NDEF size: %2$d bytes%3$s</string>
+    <string name="build_ndef_record_item">%1$d. %2$s: %3$s</string>
+
+    <string name="build_ndef_type_website">Website</string>
+    <string name="build_ndef_type_phone">Phone</string>
+    <string name="build_ndef_type_text">Text</string>
+
+    <string name="build_ndef_error_empty_value">Value cannot be empty</string>
+    <string name="build_ndef_error_add_failed">Failed to add record: %s</string>
+    <string name="build_ndef_error_empty_records">Please add at least one record</string>
+    <string name="build_ndef_error_build_failed">Failed to build NDEF: %s</string>
+    <string name="build_ndef_error_create_file_failed">Failed to create NDEF file</string>
+    <string name="build_ndef_saved">Created: %s</string>
+
+    <string name="build_ndef_ntag_213">, fits NTAG213 approximately</string>
+    <string name="build_ndef_ntag_215_216">, may require NTAG215/216</string>
+    <string name="build_ndef_ntag_216">, may require NTAG216</string>
+    <string name="build_ndef_ntag_too_large">, may exceed common NTAG capacity</string>
 </resources>