Example usage for android.support.v4.view.accessibility AccessibilityRecordCompat AccessibilityRecordCompat

Introduction

In this page you can find the example usage for android.support.v4.view.accessibility AccessibilityRecordCompat AccessibilityRecordCompat.

Prototype

public AccessibilityRecordCompat(Object record) 

Source Link

Usage

From source file:com.android.gallery3d.util.AccessibilityUtils.java

public static void makeAnnouncement(View view, CharSequence announcement) {
    if (view == null)
        return;//from  w  w w .  j  a  va2 s.c om
    if (ApiHelper.HAS_ANNOUNCE_FOR_ACCESSIBILITY) {
        view.announceForAccessibility(announcement);
    } else {
        // For API 15 and earlier, we need to construct an accessibility event
        Context ctx = view.getContext();
        AccessibilityManager am = (AccessibilityManager) ctx.getSystemService(Context.ACCESSIBILITY_SERVICE);
        if (!am.isEnabled())
            return;
        AccessibilityEvent event = AccessibilityEvent
                .obtain(AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED);
        AccessibilityRecordCompat arc = new AccessibilityRecordCompat(event);
        arc.setSource(view);
        event.setClassName(view.getClass().getName());
        event.setPackageName(view.getContext().getPackageName());
        event.setEnabled(view.isEnabled());
        event.getText().add(announcement);
        am.sendAccessibilityEvent(event);
    }
}

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From source file:com.android.fastergallery.util.AccessibilityUtils.java

public static void makeAnnouncement(View view, CharSequence announcement) {
    if (view == null)
        return;//w w  w .  j  a  va  2s.co  m
    if (ApiHelper.HAS_ANNOUNCE_FOR_ACCESSIBILITY) {
        view.announceForAccessibility(announcement);
    } else {
        // For API 15 and earlier, we need to construct an accessibility
        // event
        Context ctx = view.getContext();
        AccessibilityManager am = (AccessibilityManager) ctx.getSystemService(Context.ACCESSIBILITY_SERVICE);
        if (!am.isEnabled())
            return;
        AccessibilityEvent event = AccessibilityEvent
                .obtain(AccessibilityEvent.TYPE_NOTIFICATION_STATE_CHANGED);
        AccessibilityRecordCompat arc = new AccessibilityRecordCompat(event);
        arc.setSource(view);
        event.setClassName(view.getClass().getName());
        event.setPackageName(view.getContext().getPackageName());
        event.setEnabled(view.isEnabled());
        event.getText().add(announcement);
        am.sendAccessibilityEvent(event);
    }
}

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From source file:com.google.android.marvin.mytalkback.formatter.ImageViewFormatter.java

@Override
public boolean format(AccessibilityEvent event, TalkBackService context, Utterance utterance) {
    final AccessibilityRecordCompat record = new AccessibilityRecordCompat(event);
    final AccessibilityNodeInfoCompat source = record.getSource();
    final CharSequence text = ruleNonTextViews.format(context, source, event);
    utterance.addSpoken(text);//from  ww w  .j  a v a  2 s.  c om
    return true;
}

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From source file:com.google.android.marvin.mytalkback.formatter.ProgressBarFormatter.java

private boolean shouldDropEvent(AccessibilityEvent event) {
    final AccessibilityRecordCompat record = new AccessibilityRecordCompat(event);
    final AccessibilityNodeInfoCompat source = record.getSource();

    // Don't drop if we're on pre-ICS or the event was generated (e.g.
    // missing a node).
    if (source == null) {
        return false;
    }//from   w  ww .jav a2 s. c o  m

    // Don't drop if the node is currently focused or accessibility focused.
    if (source.isFocused() || source.isAccessibilityFocused()) {
        return false;
    }

    // Don't drop if the node was recently explored.
    if (source.equals(sRecentlyExplored)) {
        return false;
    }

    return true;
}

---

From source file:com.google.android.marvin.mytalkback.ProcessorWebContent.java

@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
    // Only announce relevant events
    if (!AccessibilityEventUtils.eventMatchesAnyType(event, MASK_ACCEPTED_EVENT_TYPES)) {
        return;// w w w. j av a 2 s  .com
    }

    final AccessibilityRecordCompat record = new AccessibilityRecordCompat(event);
    final AccessibilityNodeInfoCompat source = record.getSource();

    // Drop consecutive qualifying events from the same node.
    if (mLastNode != null && mLastNode.equals(source)) {
        return;
    } else {
        if (mLastNode != null) {
            mLastNode.recycle();
        }
        mLastNode = source;
    }

    // Only announce nodes that have web content.
    if (!WebInterfaceUtils.hasWebContent(source)) {
        return;
    }

    if (WebInterfaceUtils.isScriptInjectionEnabled(mService)) {
        // Instruct accessibility script to announce the page title as long
        // as continuous reading isn't active.
        if (mFullScreenReadController.getReadingState() != AutomaticReadingState.ENTERING_WEB_CONTENT) {
            WebInterfaceUtils.performSpecialAction(source, WebInterfaceUtils.ACTION_READ_PAGE_TITLE_ELEMENT);
        } else {
            // Reset the state for full screen reading now that we've moved
            // into web content.
            mFullScreenReadController.interrupt();
        }
    } else if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.JELLY_BEAN_MR1) {
        // On versions that include a script injection preference, inform
        // the user that script injection is disabled.
        final String preferenceName = AutomationUtils.getPackageString(mService, PACKAGE_SETTINGS,
                RES_NAME_SCRIPT_INJECTION_TITLE);
        if (preferenceName != null) {
            final CharSequence announcement = mService.getString(R.string.hint_script_injection,
                    preferenceName);
            mSpeechController.speak(announcement, SpeechController.QUEUE_MODE_INTERRUPT, 0, null);
        }
    }
}

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From source file:com.google.android.marvin.mytalkback.formatter.ScrollFormatter.java

/**
 * Returns a floating point value representing the scroll position of an
 * {@link AccessibilityEvent}. This value may be outside the range {0..1}.
 * If there's no valid way to obtain a position, this method returns 0.5.
 *
 * @param event The event from which to obtain the scroll position.
 * @return A floating point value representing the scroll position.
 *//*  ww  w  .  j a v  a2 s . c om*/
private float getScrollPosition(AccessibilityEvent event) {
    final AccessibilityRecordCompat record = new AccessibilityRecordCompat(event);
    final int itemCount = event.getItemCount();
    final int fromIndex = event.getFromIndex();

    // First, attempt to use (fromIndex / itemCount).
    if ((fromIndex >= 0) && (itemCount > 0)) {
        return (fromIndex / (float) itemCount);
    }

    final int scrollY = record.getScrollY();
    final int maxScrollY = record.getMaxScrollY();

    // Next, attempt to use (scrollY / maxScrollY). This will fail if the
    // getMaxScrollX() method is not available.
    if ((scrollY >= 0) && (maxScrollY > 0)) {
        return (scrollY / (float) maxScrollY);
    }

    // Finally, attempt to use (scrollY / itemCount).
    // TODO(alanv): Hack from previous versions -- is it still needed?
    if ((scrollY >= 0) && (itemCount > 0) && (scrollY <= itemCount)) {
        return (scrollY / (float) itemCount);
    }

    return 0.5f;
}

---

From source file:com.google.android.marvin.mytalkback.ProcessorLongHover.java

@Override
public void onAccessibilityEvent(AccessibilityEvent event) {
    final int eventType = event.getEventType();

    if ((eventType == AccessibilityEvent.TYPE_VIEW_HOVER_ENTER)
            || (eventType == AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_START)) {
        mIsTouchExploring = true;//from ww  w  .  java 2 s .  c  o  m
    }

    if (eventType == AccessibilityEvent.TYPE_TOUCH_EXPLORATION_GESTURE_END) {
        mIsTouchExploring = false;
        cacheEnteredNode(null);
        cancelLongHover();
        return;
    }

    if (!mIsTouchExploring
            || ((eventType != TRIGGER_ACTION) && (eventType != AccessibilityEvent.TYPE_VIEW_HOVER_EXIT))) {
        return;
    }

    final AccessibilityRecordCompat record = new AccessibilityRecordCompat(event);
    final AccessibilityNodeInfoCompat source = record.getSource();

    if (source == null) {
        return;
    }

    if (eventType == TRIGGER_ACTION) {
        cacheEnteredNode(source);
        postLongHoverRunnable(event);
    } else if (eventType == AccessibilityEventCompat.TYPE_VIEW_HOVER_EXIT) {
        if (source.equals(mWaitingForExit)) {
            cancelLongHover();
        }
    }

    source.recycle();
}

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From source file:com.google.android.marvin.mytalkback.formatter.TouchExplorationFormatter.java

/**
 * Formatter that returns an utterance to announce touch exploration.
 *///from  w w w .java  2 s.com
@Override
public boolean format(AccessibilityEvent event, TalkBackService context, Utterance utterance) {
    final AccessibilityRecordCompat record = new AccessibilityRecordCompat(event);
    final AccessibilityNodeInfoCompat sourceNode = record.getSource();
    final AccessibilityNodeInfoCompat focusedNode = getFocusedNode(event.getEventType(), sourceNode);

    // Drop the event if the source node was non-null, but the focus
    // algorithm decided to drop the event by returning null.
    if ((sourceNode != null) && (focusedNode == null)) {
        AccessibilityNodeInfoUtils.recycleNodes(sourceNode);
        return false;
    }

    LogUtils.log(this, Log.VERBOSE, "Announcing node: %s", focusedNode);

    // Populate the utterance.
    addDescription(utterance, focusedNode, event, sourceNode);
    addFeedback(utterance, focusedNode);

    // By default, touch exploration flushes all other events.
    utterance.getMetadata().putInt(Utterance.KEY_METADATA_QUEUING, DEFAULT_QUEUING_MODE);

    // Events formatted by this class should always advance continuous
    // reading, if active.
    utterance.addSpokenFlag(FeedbackItem.FLAG_ADVANCE_CONTINUOUS_READING);

    AccessibilityNodeInfoUtils.recycleNodes(sourceNode, focusedNode);

    return true;
}

---

From source file:com.google.android.marvin.mytalkback.ProcessorLongHover.java

/**
 * Given an {@link AccessibilityEvent}, obtains and speaks a long
 * hover utterance.//w w  w .  j ava  2s  .c  o m
 *
 * @param event The source event.
 */
private void speakLongHover(AccessibilityEvent event) {
    // Never speak hint text if the tutorial is active
    if (AccessibilityTutorialActivity.isTutorialActive()) {
        LogUtils.log(this, Log.VERBOSE, "Dropping long hover hint speech because tutorial is active.");
        return;
    }

    final AccessibilityRecordCompat record = new AccessibilityRecordCompat(event);
    AccessibilityNodeInfoCompat source = record.getSource();

    if (source == null) {
        return;
    }

    // If this was a HOVER_ENTER event, we need to compute the focused node.
    // TODO: We're already doing this in the touch exploration formatter --
    // maybe this belongs there instead?
    if (event.getEventType() == AccessibilityEventCompat.TYPE_VIEW_HOVER_ENTER) {
        source = AccessibilityNodeInfoUtils.findFocusFromHover(mContext, source);
        if (source == null) {
            return;
        }
    }

    final CharSequence text = mRuleProcessor.getHintForNode(source);
    source.recycle();

    // Use QUEUE mode so that we don't interrupt more important messages.
    mSpeechController.speak(text, SpeechController.QUEUE_MODE_QUEUE, FeedbackItem.FLAG_NO_HISTORY, null);
}

---

From source file:com.google.android.marvin.mytalkback.ProcessorScrollPosition.java

private void updateRecentlyExplored(AccessibilityEvent event) {
    // TODO(alanv): We track this in several places. Need to refactor.

    // We only need to track recently explored views on ICS.
    if ((Build.VERSION.SDK_INT < Build.VERSION_CODES.ICE_CREAM_SANDWICH)
            || (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN)) {
        return;/*from w  ww  .ja v  a  2s  .  com*/
    }

    // Exploration is the result of HOVER_ENTER events.
    if (event.getEventType() != AccessibilityEventCompat.TYPE_VIEW_HOVER_ENTER) {
        return;
    }

    final AccessibilityRecordCompat record = new AccessibilityRecordCompat(event);
    final AccessibilityNodeInfoCompat node = record.getSource();

    if (mRecentlyExplored != null) {
        if (mRecentlyExplored.equals(node)) {
            return;
        }

        mRecentlyExplored.recycle();
        mRecentlyExplored = null;
    }

    if (node != null) {
        mRecentlyExplored = AccessibilityNodeInfoCompat.obtain(node);
    }
}

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