raxhaxor

@UnsupportedAppUsage
    final void attach(Context context, ActivityThread aThread,
            Instrumentation instr, IBinder token, int ident,
            Application application, Intent intent, ActivityInfo info,
            CharSequence title, Activity parent, String id,
            NonConfigurationInstances lastNonConfigurationInstances,
            Configuration config, String referrer, IVoiceInteractor voiceInteractor,
            Window window, ActivityConfigCallback activityConfigCallback, IBinder assistToken) {
        // -------
        mWindow = new PhoneWindow(this, window, activityConfigCallback);

raxhaxor

public class DecorView extends FrameLayout implements RootViewSurfaceTaker, WindowCallbacks { .. }

raxhaxor

protected ViewGroup generateLayout(DecorView decor) {
  ...

if (..) {}
else if (..) {}
else if ((features & (1 << FEATURE_ACTION_MODE_OVERLAY)) != 0) {
            layoutResource = com.android.internal.R.layout.screen_simple_overlay_action_mode;
        }
else {
          // Embedded, so no decoration is needed.

raxhaxor

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true"
    android:orientation="vertical">
    <ViewStub android:id="@+id/action_mode_bar_stub"
              android:inflatedId="@+id/action_mode_bar"
              android:layout="@layout/action_mode_bar"
              android:layout_width="match_parent"
              android:layout_height="wrap_content"

raxhaxor

@Override
    public void setContentView(int layoutResID) {
        if (mContentParent == null) {
            installDecor();
        } else {
            mContentParent.removeAllViews();
        }
        mLayoutInflater.inflate(layoutResID, mContentParent);
        final Callback cb = getCallback();
        if (cb != null && !isDestroyed()) {

raxhaxor

private void installDecor() {
        if (mDecor == null) {
            mDecor = generateDecor();
            mDecor.setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);
            mDecor.setIsRootNamespace(true);
        }
        if (mContentParent == null) {
            mContentParent = generateLayout(mDecor);
            
            ...

raxhaxor

@Override
public void addContentView(View view, ViewGroup.LayoutParams params) {
    if (mContentParent == null) {
        installDecor();
    }
    mContentParent.addView(view, params);
    final Callback cb = getCallback();
    if (cb != null && !isDestroyed()) {
        cb.onContentChanged();
    }

raxhaxor

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    setContentView(R.layout.simple_layout);
    
	  OverlayLayout overlayLayout = new OverlayLayout(this); // our overlay view
    
    addContentView(overlayLayout, new RelativeLayout.LayoutParams(RelativeLayout.LayoutParams.MATCH_PARENT,RelativeLayout.LayoutParams.MATCH_PARENT));   
}

raxhaxor

((ViewGroup) overlayLayout.getParent()).removeView(overlayLayout);

raxhaxor

getWindow().getDecorView().findViewById(android.R.id.content).addView(View(context))