Features

DEX interpreter

The interpreter covers the main Dalvik instruction set: arithmetic, branching, switch, arrays, fields, method dispatch (virtual, super, direct, static, interface), exception handling and move-result plumbing.

Resource parsing

Binary AndroidManifest.xml and resources.arsc are parsed directly. Resource IDs resolve through the table, so theme attributes, string references and file paths behave the way the app expects.

Framework subset

Area	What works
Activity	Lifecycle, setContentView, findViewById, startActivity within the app
Views	LinearLayout, FrameLayout, RelativeLayout, ScrollView, ViewPager, RecyclerView, CoordinatorLayout, DrawerLayout, Toolbar, TabLayout
Widgets	TextView, Button, EditText, ImageView, ProgressBar, CheckBox, Switch
Drawables	shape, vector, ripple, selector, GradientDrawable, RippleDrawable, backgroundTint
Themes	Context.setTheme, theme inheritance, @android:color/* resolution
Input	Soft keyboard bridge, InputMethodManager, selection and caret
System	Build, VERSION, SystemProperties, ActivityManager.getMemoryInfo

Device info

Device identity comes from navigator where the browser exposes it:

Browser API	Used for
navigator.platform	ro.product.device, board, hardware
navigator.language	ro.product.locale, region
navigator.hardwareConcurrency	Runtime.availableProcessors()
navigator.deviceMemory	MemoryInfo.totalMem, Runtime.maxMemory()
navigator.maxTouchPoints	Touch capability

When a browser withholds a value, apk.js falls back to a fixed default so apps still start.