Example usage for android.view ViewGroup getFocusables

Introduction

In this page you can find the example usage for android.view ViewGroup getFocusables.

Prototype

public ArrayList<View> getFocusables(@FocusDirection int direction) 

Source Link

Document

Find and return all focusable views that are descendants of this view, possibly including this view if it is focusable itself.

Usage

From source file:android.car.ui.provider.CarDrawerLayout.java

/**
 * Close the specified drawer view by animating it into view.
 *//*from w  w  w .j av a 2  s  .  c om*/
public void closeDrawer() {
    ViewGroup drawerView = (ViewGroup) findDrawerView();
    if (!isDrawerView(drawerView)) {
        throw new IllegalArgumentException("View " + drawerView + " is not a sliding drawer");
    }
    mStartedOpen = true;

    // Don't trigger the close drawer animation if drawer is not open.
    if (hasWindowFocus() && isDrawerOpen()) {
        int left;
        LayoutParams drawerLp = (LayoutParams) drawerView.getLayoutParams();
        if (checkDrawerViewAbsoluteGravity(drawerView, Gravity.LEFT)) {
            left = drawerLp.getMarginStart() - drawerView.getWidth();
        } else {
            left = drawerLp.getMarginStart() + getWidth();
        }
        mDragger.smoothSlideViewTo(drawerView, left, drawerView.getTop());
        dispatchOnDrawerClosing(drawerView);
    } else {
        final LayoutParams lp = (LayoutParams) drawerView.getLayoutParams();
        lp.onScreen = 0.f;
        dispatchOnDrawerClosed(drawerView);
    }

    ViewGroup contentView = (ViewGroup) findContentView();
    drawerView.setDescendantFocusability(ViewGroup.FOCUS_BLOCK_DESCENDANTS);
    contentView.setDescendantFocusability(ViewGroup.FOCUS_AFTER_DESCENDANTS);

    if (!isInTouchMode()) {
        List<View> focusables = contentView.getFocusables(FOCUS_DOWN);
        if (focusables.size() > 0) {
            View candidate = focusables.get(0);
            candidate.requestFocus();
        }
    }
    invalidate();
}

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