Example usage for android.view.accessibility AccessibilityNodeInfo ACTION_ACCESSIBILITY_FOCUS

Introduction

In this page you can find the example usage for android.view.accessibility AccessibilityNodeInfo ACTION_ACCESSIBILITY_FOCUS.

Prototype

int ACTION_ACCESSIBILITY_FOCUS

To view the source code for android.view.accessibility AccessibilityNodeInfo ACTION_ACCESSIBILITY_FOCUS.

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Document

Action that gives accessibility focus to the node.

Usage

From source file:com.googlecode.eyesfree.brailleback.DefaultNavigationMode.java

private boolean activateNode(AccessibilityNodeInfoCompat node, int position) {
    if (node == null) {
        return false;
    }//  w w w.j  ava2  s  .  c  om
    AccessibilityNodeInfoRef current = AccessibilityNodeInfoRef.unOwned(node);
    try {
        do {
            LogUtils.log(this, Log.VERBOSE, "Considering to click: %s", current.get().getInfo());
            int supportedActions = current.get().getActions();
            int action = 0;
            // For edit texts, the click action doesn't currently focus
            // the view, so we special case it here.
            // TODO: Revise when that changes.
            if (AccessibilityNodeInfoUtils.nodeMatchesClassByType(mAccessibilityService, current.get(),
                    EditText.class)) {
                if ((supportedActions & AccessibilityNodeInfo.ACTION_FOCUS) != 0) {
                    action = AccessibilityNodeInfo.ACTION_FOCUS;
                } else {
                    // Put accessibility focus on the field.  If it is
                    // already focused and the IME is selected, that will
                    // activate the editing.
                    action = AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS;
                }
            } else if (position >= 0 && isSelfBrailled(current.get())
                    && (supportedActions & AccessibilityNodeInfo.ACTION_CLICK) != 0) {
                // Generate a fake "action". For instance, a click at
                // position 33 maps to -275000033.
                // TODO: Remove this hack when a better way to pass this
                // information exists.
                int fakeAction = ACTION_BRAILLE_CLICK_MAX - position;
                if (fakeAction < ACTION_BRAILLE_CLICK_MIN) {
                    LogUtils.log(this, Log.WARN, "underflow activating node %s at position %d", current.get(),
                            position);
                    fakeAction = ACTION_BRAILLE_CLICK_MIN;
                } else if (fakeAction > ACTION_BRAILLE_CLICK_MAX) {
                    LogUtils.log(this, Log.WARN, "overflow activating node %s at position %d", current.get(),
                            position);
                    fakeAction = ACTION_BRAILLE_CLICK_MAX;
                }
                if (WebInterfaceUtils.performSpecialAction(current.get(), fakeAction)) {
                    return true;
                }
            } else if ((supportedActions & AccessibilityNodeInfo.ACTION_CLICK) != 0) {
                action = AccessibilityNodeInfo.ACTION_CLICK;
            }
            if (action != 0 && current.get().performAction(action)) {
                return true;
            } else {
                LogUtils.log(this, Log.VERBOSE, "Action %d failed", action);
            }
        } while (current.parent());
    } finally {
        current.recycle();
    }
    LogUtils.log(this, Log.VERBOSE, "Click action failed");
    return false;
}

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From source file:com.googlecode.eyesfree.brailleback.DefaultNavigationMode.java

/**
 * Attempts to navigate to the top-most focusable node in the tree.
 *//*from   ww w .j a  v a 2s  . c  om*/
private boolean attemptNavigateTop() {
    AccessibilityNodeInfoCompat root = AccessibilityServiceCompatUtils
            .getRootInActiveWindow(mAccessibilityService);
    AccessibilityNodeInfoCompat toFocus = null;
    if (AccessibilityNodeInfoUtils.shouldFocusNode(mAccessibilityService, root)) {
        toFocus = root;
        root = null;
    } else {
        toFocus = mFocusFinder.linear(root, FocusFinder.SEARCH_FORWARD);
        if (toFocus == null) {
            // Fall back on root as a last resort.
            toFocus = root;
            root = null;
        }
    }

    try {
        if (toFocus.isAccessibilityFocused()) {
            brailleFocusedNode();
            return true;
        }

        return toFocus.performAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    } finally {
        AccessibilityNodeInfoUtils.recycleNodes(root, toFocus);
    }
}

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From source file:com.googlecode.eyesfree.brailleback.DefaultNavigationMode.java

/**
 * Attempts to navigate to the bottom-most focusable node in the tree.
 *///from w  w w .j av  a2  s.c  o  m
private boolean attemptNavigateBottom() {
    AccessibilityNodeInfoCompat root = AccessibilityServiceCompatUtils
            .getRootInActiveWindow(mAccessibilityService);
    AccessibilityNodeInfoCompat toFocus = FocusFinder.findLastFocusableDescendant(root, mAccessibilityService);

    try {
        if (toFocus == null) {
            if (AccessibilityNodeInfoUtils.shouldFocusNode(mAccessibilityService, root)) {
                root = null;
                toFocus = root;
            } else {
                return false;
            }
        }

        if (toFocus.isAccessibilityFocused()) {
            brailleFocusedNode();
            return true;
        }

        return toFocus.performAction(AccessibilityNodeInfo.ACTION_ACCESSIBILITY_FOCUS);
    } finally {
        AccessibilityNodeInfoUtils.recycleNodes(root, toFocus);
    }
}

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