original delivery

app/build.gradle.kts

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+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+}
+
+android { namespace = "com.bozz.kosssh"; compileSdk = 37
+    defaultConfig { applicationId = "com.bozz.kosssh"; minSdk = 26; targetSdk = 35; versionCode = 1; versionName = "1.0.0" }
+    buildToolsVersion = "35.0.0"
+}
+
+dependencies {
+    implementation("androidx.core:core-ktx:1.15.0")
+    implementation("androidx.appcompat:appcompat:1.7.0")
+    implementation("com.google.android.material:material:1.12.0")
+    implementation("com.github.mwiede:jsch:0.2.23")
+}

app/src/main/AndroidManifest.xml

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+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <uses-permission android:name="android.permission.INTERNET" />
+    <application android:theme="@style/Theme.KosSSHMobile" android:label="KosSSH Mobile" android:allowBackup="true" android:supportsRtl="true">
+        <activity android:name=".ui.MainActivity" android:screenOrientation="unspecified" android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/><category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

app/src/main/java/com/bozz/kosssh/ssh/SshClient.kt

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+package com.bozz.kosssh.ssh
+
+import com.jcraft.jsch.ChannelShell
+import com.jcraft.jsch.JSch
+import com.jcraft.jsch.Session
+import java.io.InputStream
+import java.io.OutputStream
+
+class SshClient {
+    private var session: Session? = null
+    private var channel: ChannelShell? = null
+    private var input: InputStream? = null
+    private var output: OutputStream? = null
+
+    fun connect(host: String, port: Int, user: String, password: String,
+                onData: (String) -> Unit, onState: (String) -> Unit) {
+        Thread {
+            try {
+                onState("Connecting…")
+                val jsch = JSch()
+                val s = jsch.getSession(user, host, port)
+                s.setPassword(password)
+                s.setConfig("StrictHostKeyChecking", "no") // MVP; replace with known_hosts verification before production.
+                s.connect(12_000)
+                session = s
+                val c = s.openChannel("shell") as ChannelShell
+                c.setPtyType("xterm-256color", 120, 40, 0, 0)
+                c.setEnv("TERM", "xterm-256color")
+                c.connect(8_000)
+                channel = c
+                input = c.inputStream
+                output = c.outputStream
+                onState("Connected")
+                val buf = ByteArray(8192)
+                while (!c.isClosed) {
+                    val n = input!!.read(buf)
+                    if (n > 0) onData(String(buf, 0, n, Charsets.UTF_8))
+                }
+                onState("Disconnected")
+            } catch (e: Exception) {
+                onState("Error: ${e.message ?: e.javaClass.simpleName}")
+                close()
+            }
+        }.start()
+    }
+
+    fun write(bytes: ByteArray) {
+        try { output?.write(bytes); output?.flush() } catch (_: Exception) { }
+    }
+
+    fun write(text: String) = write(text.toByteArray(Charsets.UTF_8))
+
+    fun close() {
+        try { channel?.disconnect() } catch (_: Exception) {}
+        try { session?.disconnect() } catch (_: Exception) {}
+        channel = null; session = null; input = null; output = null
+    }
+}

app/src/main/java/com/bozz/kosssh/terminal/TerminalView.kt

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+package com.bozz.kosssh.terminal
+
+import android.content.Context
+import android.graphics.*
+import android.text.InputType
+import android.view.*
+import android.view.inputmethod.*
+import java.util.ArrayDeque
+import kotlin.math.max
+
+class TerminalView(context: Context) : View(context) {
+    private val paint = Paint(Paint.ANTI_ALIAS_FLAG).apply { typeface = Typeface.MONOSPACE }
+    private val lines = ArrayDeque<MutableList<Cell>>()
+    private var current = mutableListOf<Cell>()
+    private var cursorX = 0
+    private var cursorY = 0
+    private var fg = Color.rgb(230, 237, 243)
+    private var bg = Color.rgb(13, 17, 23)
+    private var bold = false
+    private var escape = ""
+    var fontSizePx = 15f
+        set(v) { field = v.coerceIn(8f, 40f); invalidate() }
+    var cursorColor = Color.rgb(126, 231, 135)
+    private var ctrlLatch = false
+    private var sender: ((ByteArray) -> Unit)? = null
+    private val scrollback = 2000
+
+    data class Cell(val ch: Char, val color: Int, val bold: Boolean)
+
+    init {
+        isFocusableInTouchMode = true
+        setBackgroundColor(bg)
+        clear()
+    }
+
+    fun setSender(s: (ByteArray) -> Unit) { sender = s }
+    fun clear() { lines.clear(); current = mutableListOf(); cursorX = 0; cursorY = 0; invalidate() }
+    fun setTheme(background: Int, foreground: Int) { bg = background; fg = foreground; setBackgroundColor(bg); invalidate() }
+
+    fun feed(data: String) {
+        data.forEach { ch -> process(ch) }
+        invalidate()
+    }
+
+    private fun process(ch: Char) {
+        if (escape.isNotEmpty() || ch == '\u001b') { processEscape(ch); return }
+        when (ch) {
+            '\r' -> cursorX = 0
+            '\n' -> newLine()
+            '\b' -> cursorX = max(0, cursorX - 1)
+            '\t' -> repeat(4) { put(' ') }
+            '\u0007' -> Unit
+            else -> if (ch >= ' ') put(ch)
+        }
+    }
+
+    private fun put(ch: Char) {
+        while (current.size < cursorX) current.add(Cell(' ', fg, bold))
+        if (cursorX < current.size) current[cursorX] = Cell(ch, fg, bold) else current.add(Cell(ch, fg, bold))
+        cursorX++
+        if (cursorX >= 200) newLine()
+    }
+
+    private fun newLine() {
+        lines.addLast(current); if (lines.size > scrollback) lines.removeFirst()
+        current = mutableListOf(); cursorX = 0; cursorY++
+    }
+
+    private fun processEscape(ch: Char) {
+        if (escape.isEmpty()) { escape = "\u001b"; return }
+        escape += ch
+        if (ch == 'm') { sgr(escape.drop(2).dropLast(1)); escape = ""; return }
+        if (escape.startsWith("\u001b[") && ch in "ABCDEFGHJKfnsu") { escape = ""; return }
+        if (escape.length > 32) escape = ""
+    }
+
+    private fun sgr(seq: String) {
+        if (seq.isEmpty()) { fg = Color.rgb(230,237,243); bold = false; return }
+        seq.split(';').mapNotNull { it.toIntOrNull() }.forEach { n ->
+            when {
+                n == 0 -> { fg = Color.rgb(230,237,243); bold = false }
+                n == 1 -> bold = true
+                n == 22 -> bold = false
+                n in 30..37 -> fg = ansi16(n - 30)
+                n in 90..97 -> fg = ansi16(n - 90 + 8)
+                n == 39 -> fg = Color.rgb(230,237,243)
+            }
+        }
+    }
+
+    private fun ansi16(i: Int): Int = intArrayOf(
+        Color.rgb(72,79,88), Color.rgb(255,123,114), Color.rgb(126,231,135), Color.rgb(210,153,34),
+        Color.rgb(121,192,255), Color.rgb(210,168,255), Color.rgb(86,212,221), Color.rgb(240,246,252),
+        Color.rgb(139,148,158), Color.rgb(255,123,114), Color.rgb(126,231,135), Color.rgb(227,179,65),
+        Color.rgb(121,192,255), Color.rgb(210,168,255), Color.rgb(86,212,221), Color.WHITE
+    )[i.coerceIn(0,15)]
+
+    override fun onDraw(c: Canvas) {
+        super.onDraw(c)
+        paint.textSize = fontSizePx
+        paint.typeface = Typeface.MONOSPACE
+        val fm = paint.fontMetrics
+        val lineH = (fm.descent - fm.ascent) * 1.12f
+        val charW = paint.measureText("M")
+        val visible = height / lineH
+        val all = lines.toList() + listOf(current)
+        val start = max(0, all.size - visible.toInt())
+        var y = -fm.ascent
+        for (i in start until all.size) {
+            var x = 0f
+            for (cell in all[i]) {
+                paint.color = cell.color
+                paint.typeface = if (cell.bold) Typeface.create(Typeface.MONOSPACE, Typeface.BOLD) else Typeface.MONOSPACE
+                c.drawText(cell.ch.toString(), x, y, paint); x += charW
+            }
+            y += lineH
+        }
+        paint.color = cursorColor
+        val cursorLine = all.size - 1
+        if (cursorLine >= start) c.drawRect(cursorX * charW, y - lineH, cursorX * charW + 2, y - 2, paint)
+    }
+
+    override fun onTouchEvent(event: MotionEvent): Boolean {
+        if (event.action == MotionEvent.ACTION_DOWN) { requestFocus(); showKeyboard(); return true }
+        return true
+    }
+
+    private fun showKeyboard() { (context.getSystemService(Context.INPUT_METHOD_SERVICE) as InputMethodManager).showSoftInput(this, InputMethodManager.SHOW_IMPLICIT) }
+
+    override fun onCheckIsTextEditor() = true
+    override fun onCreateInputConnection(outAttrs: EditorInfo): InputConnection {
+        outAttrs.inputType = InputType.TYPE_CLASS_TEXT or InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS
+        outAttrs.imeOptions = EditorInfo.IME_FLAG_NO_EXTRACT_UI
+        return object : BaseInputConnection(this, false) {
+            override fun commitText(text: CharSequence, newCursorPosition: Int): Boolean { send(text.toString()); return true }
+            override fun deleteSurroundingText(beforeLength: Int, afterLength: Int): Boolean { send("\u007f".repeat(max(1,beforeLength))); return true }
+        }
+    }
+
+    override fun onKeyDown(keyCode: Int, event: KeyEvent): Boolean {
+        val seq = when (keyCode) {
+            KeyEvent.KEYCODE_ENTER -> "\r"
+            KeyEvent.KEYCODE_TAB -> "\t"
+            KeyEvent.KEYCODE_DEL -> "\u007f"
+            KeyEvent.KEYCODE_ESCAPE -> "\u001b"
+            KeyEvent.KEYCODE_DPAD_UP -> "\u001b[A"
+            KeyEvent.KEYCODE_DPAD_DOWN -> "\u001b[B"
+            KeyEvent.KEYCODE_DPAD_LEFT -> "\u001b[D"
+            KeyEvent.KEYCODE_DPAD_RIGHT -> "\u001b[C"
+            else -> if (event.unicodeChar != 0) event.unicodeChar.toChar().toString() else null
+        }
+        if (seq != null) { send(seq); return true }
+        return super.onKeyDown(keyCode, event)
+    }
+
+    fun sendCtrl(letter: Char) { send(byteArrayOf((letter.uppercaseChar().code - 64).toByte())) }
+    private fun send(s: String) { sender?.invoke(s.toByteArray(Charsets.UTF_8)) }
+}

app/src/main/java/com/bozz/kosssh/ui/MainActivity.kt

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+package com.bozz.kosssh.ui
+
+import android.app.*
+import android.graphics.Color
+import android.os.Bundle
+import android.view.View
+import android.widget.*
+import com.bozz.kosssh.R
+import com.bozz.kosssh.ssh.SshClient
+import com.bozz.kosssh.terminal.TerminalView
+
+class MainActivity : Activity() {
+    private lateinit var terminal: TerminalView
+    private val ssh = SshClient()
+    private lateinit var status: TextView
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_main)
+        terminal = findViewById(R.id.terminal)
+        status = findViewById(R.id.status)
+        terminal.setSender { ssh.write(it) }
+        findViewById<Button>(R.id.connect).setOnClickListener { connect() }
+        findViewById<Button>(R.id.ctrl).setOnClickListener { showCtrlDialog() }
+        findViewById<Button>(R.id.esc).setOnClickListener { ssh.write(byteArrayOf(27)) }
+        findViewById<Button>(R.id.tab).setOnClickListener { ssh.write("\t") }
+        findViewById<Button>(R.id.up).setOnClickListener { ssh.write("\u001b[A") }
+        findViewById<Button>(R.id.down).setOnClickListener { ssh.write("\u001b[B") }
+        findViewById<Button>(R.id.left).setOnClickListener { ssh.write("\u001b[D") }
+        findViewById<Button>(R.id.right).setOnClickListener { ssh.write("\u001b[C") }
+        findViewById<Button>(R.id.settings).setOnClickListener { showSettings() }
+    }
+
+    private fun connect() {
+        val host = findViewById<EditText>(R.id.host).text.toString().trim()
+        val port = findViewById<EditText>(R.id.port).text.toString().toIntOrNull() ?: 22
+        val user = findViewById<EditText>(R.id.user).text.toString().trim()
+        val pass = findViewById<EditText>(R.id.password).text.toString()
+        if (host.isEmpty() || user.isEmpty()) { Toast.makeText(this,"Host dan username wajib diisi",Toast.LENGTH_SHORT).show(); return }
+        terminal.clear()
+        ssh.connect(host, port, user, pass, { data -> runOnUiThread { terminal.feed(data) } }, { s -> runOnUiThread { status.text = s } })
+    }
+
+    private fun showCtrlDialog() {
+        val letters = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+        AlertDialog.Builder(this).setTitle("CTRL + …").setItems(letters.map { "Ctrl + $it" }.toTypedArray()) { _, which -> terminal.sendCtrl(letters[which]) }.show()
+    }
+
+    private fun showSettings() {
+        val size = SeekBar(this).apply { max = 32; progress = (terminal.fontSizePx - 8).toInt() }
+        val box = LinearLayout(this).apply { orientation = LinearLayout.VERTICAL; setPadding(32,16,32,8); addView(TextView(this@MainActivity).apply { text = "Font size" }); addView(size) }
+        size.setOnSeekBarChangeListener(object: SeekBar.OnSeekBarChangeListener { override fun onProgressChanged(s: SeekBar?, p: Int, f: Boolean) { terminal.fontSizePx = (p + 8).toFloat() }; override fun onStartTrackingTouch(s: SeekBar?){}; override fun onStopTrackingTouch(s: SeekBar?){} })
+        AlertDialog.Builder(this).setTitle("Terminal Settings").setView(box).setPositiveButton("Close", null).setNeutralButton("GitHub Dark") { _, _ -> terminal.setTheme(Color.rgb(13,17,23), Color.rgb(230,237,243)) }.show()
+    }
+
+    override fun onDestroy() { ssh.close(); super.onDestroy() }
+}

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

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+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:padding="16dp" android:layout_width="match_parent" android:layout_height="match_parent">
+    <TextView android:text="KosSSH Mobile" android:textSize="24sp" android:textStyle="bold" android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingBottom="12dp"/>
+    <EditText android:id="@+id/host" android:hint="Host / IP" android:inputType="textUri" android:layout_width="match_parent" android:layout_height="wrap_content"/>
+    <LinearLayout android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content">
+        <EditText android:id="@+id/port" android:hint="Port" android:text="22" android:inputType="number" android:layout_weight="1" android:layout_width="0dp" android:layout_height="wrap_content"/>
+        <EditText android:id="@+id/user" android:hint="Username" android:layout_weight="2" android:layout_width="0dp" android:layout_height="wrap_content" android:layout_marginStart="8dp"/>
+    </LinearLayout>
+    <EditText android:id="@+id/password" android:hint="Password" android:inputType="textPassword" android:layout_width="match_parent" android:layout_height="wrap_content"/>
+    <LinearLayout android:orientation="horizontal" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="8dp"><Button android:id="@+id/connect" android:text="Connect" android:layout_weight="1" android:layout_width="0dp" android:layout_height="wrap_content"/><Button android:id="@+id/settings" android:text="Terminal Settings" android:layout_weight="1" android:layout_width="0dp" android:layout_height="wrap_content"/></LinearLayout>
+    <TextView android:id="@+id/status" android:text="Disconnected" android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingTop="8dp"/>
+    <com.bozz.kosssh.terminal.TerminalView android:id="@+id/terminal" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:layout_marginTop="8dp"/>
+    <HorizontalScrollView android:layout_width="match_parent" android:layout_height="wrap_content">
+      <LinearLayout android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content">
+        <Button android:id="@+id/ctrl" android:text="CTRL" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
+        <Button android:id="@+id/esc" android:text="ESC" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
+        <Button android:id="@+id/tab" android:text="TAB" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
+        <Button android:id="@+id/up" android:text="↑" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
+        <Button android:id="@+id/down" android:text="↓" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
+        <Button android:id="@+id/left" android:text="←" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
+        <Button android:id="@+id/right" android:text="→" android:layout_width="wrap_content" android:layout_height="wrap_content"/>
+      </LinearLayout>
+    </HorizontalScrollView>
+</LinearLayout>

app/src/main/res/values/colors.xml

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+<resources><color name="black">#000000</color><color name="white">#FFFFFF</color></resources>

app/src/main/res/values/themes.xml

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+<resources>
+<style name="Theme.KosSSHMobile" parent="Theme.Material3.DayNight.NoActionBar">
+    <item name="android:fontFamily">monospace</item>
+    <item name="android:windowLightStatusBar">false</item>
+</style>
+</resources>