android.support.v4.view.ViewCompat#dispatchApplyWindowInsets ( )源码实例Demo

@NonNull
@Override
public WindowInsetsCompat onApplyWindowInsets(CoordinatorLayout coordinatorLayout, V child, WindowInsetsCompat insets) {
    // Steal the inset and dispatch to view.
    ViewCompat.dispatchApplyWindowInsets(child, insets);
    // Pass unconsumed insets.
    return super.onApplyWindowInsets(coordinatorLayout, child, insets);
}
 

private void setWindowInsets(WindowInsetsCompat insets) {
    // Now dispatch them to our children
    for (int i = 0, z = getChildCount(); i < z; i++) {
        final View child = getChildAt(i);
        insets = ViewCompat.dispatchApplyWindowInsets(child, insets);
        if (insets.isConsumed()) {
            break;
        }
    }
}
 

private void setWindowInsets(WindowInsetsCompat insets) {
    // Invalidate the total scroll range...
    mTotalScrollRange = INVALID_SCROLL_RANGE;
    mLastInsets = insets;

    // Now dispatch them to our children
    for (int i = 0, z = getChildCount(); i < z; i++) {
        final View child = getChildAt(i);
        insets = ViewCompat.dispatchApplyWindowInsets(child, insets);
        if (insets.isConsumed()) {
            break;
        }
    }
}
 

private void dispatchChildApplyWindowInsets(WindowInsetsCompat insets) {
    if (insets.isConsumed()) {
        return;
    }

    for (int i = 0, z = getChildCount(); i < z; i++) {
        final View child = getChildAt(i);
        if (ViewCompat.getFitsSystemWindows(child)) {
            final LayoutParams lp = (LayoutParams) child.getLayoutParams();
            final Behavior b = lp.getBehavior();

            if (b != null) {
                // If the view has a behavior, let it try first
                insets = b.onApplyWindowInsets(this, child, insets);
                if (insets.isConsumed()) {
                    // If it consumed the insets, break
                    break;
                }
            }

            // Now let the view try and consume them
            insets = ViewCompat.dispatchApplyWindowInsets(child, insets);
            if (insets.isConsumed()) {
                break;
            }
        }
    }
}