Java Code Examples for android.view.accessibility.AccessibilityEvent#setContentDescription()

@Override
public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
    if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {
        // Action mode started
        //TODO event.setSource(this);
        event.setClassName(getClass().getName());
        event.setPackageName(getContext().getPackageName());
        event.setContentDescription(mTitle);
    } else {
        //TODO super.onInitializeAccessibilityEvent(event);
    }
}
 

@Override
protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
    event.setClassName(getClass().getName());

    final int type = getTypeFromId(virtualViewId);
    final int value = getValueFromId(virtualViewId);
    final CharSequence description = getVirtualViewDescription(type, value);
    event.setContentDescription(description);
}
 

@Override
public void onInitializeAccessibilityEvent(AccessibilityEvent event) {
    if (event.getEventType() == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {
        // Action mode started
        //TODO event.setSource(this);
        event.setClassName(getClass().getName());
        event.setPackageName(getContext().getPackageName());
        event.setContentDescription(mTitle);
    } else {
        //TODO super.onInitializeAccessibilityEvent(event);
    }
}
 

@Override
protected void onPopulateEventForVirtualView(int id, AccessibilityEvent event) {
    if (id == INVALID_ID) {
        throw new IllegalArgumentException("Invalid virtual view id");
    }
    event.setContentDescription(mContext.getString(R.string.action_move_here));
}
 

@Override
protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
    event.setClassName(getClass().getName());

    final int type = getTypeFromId(virtualViewId);
    final int value = getValueFromId(virtualViewId);
    final CharSequence description = getVirtualViewDescription(type, value);
    event.setContentDescription(description);
}
 

@Override
protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
    event.setClassName(getClass().getName());

    final int type = getTypeFromId(virtualViewId);
    final int value = getValueFromId(virtualViewId);
    final CharSequence description = getVirtualViewDescription(type, value);
    event.setContentDescription(description);
}
 

/**
 * Sends a window state change event with the specified text.
 *
 * @param text The text to send with the event.
 */
protected void sendWindowStateChanged(final String text) {
    final AccessibilityEvent stateChange = AccessibilityEvent.obtain(
            AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
    mKeyboardView.onInitializeAccessibilityEvent(stateChange);
    stateChange.getText().add(text);
    stateChange.setContentDescription(null);

    final ViewParent parent = mKeyboardView.getParent();
    if (parent != null) {
        parent.requestSendAccessibilityEvent(mKeyboardView, stateChange);
    }
}
 

@Override
protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
    if (mVirtualViews == null || mVirtualViews.size() <= virtualViewId) {
        // TODO(clholgat): Remove this work around when the Android bug is fixed.
        // crbug.com/420177
        event.setContentDescription(PLACE_HOLDER_STRING);
        return;
    }
    VirtualView view = mVirtualViews.get(virtualViewId);

    event.setContentDescription(view.getAccessibilityDescription());
    event.setClassName(CompositorViewHolder.class.getName());
}
 

@Override
protected void onPopulateEventForVirtualView(int id, AccessibilityEvent event) {
    if (id == INVALID_ID) {
        throw new IllegalArgumentException("Invalid virtual view id");
    }
    event.setContentDescription(mContext.getString(R.string.action_move_here));
}
 

/**
 * This method will fire whenever a child event wants to send an AccessibilityEvent.  As a
 * result, it's a great place to add more AccessibilityRecords, if you want.  In this case,
 * the code is grabbing the position of the item in the list, and assuming that to be the
 * priority for the task.
 */
@Override
public boolean onRequestSendAccessibilityEvent(View child, AccessibilityEvent event) {
    // Add a record for ourselves as well.
    AccessibilityEvent record = AccessibilityEvent.obtain();
    super.onInitializeAccessibilityEvent(record);

    int priority = (Integer) child.getTag();
    String priorityStr = "Priority: " + priority;
    record.setContentDescription(priorityStr);

    event.appendRecord(record);
    return true;
}
 

@Override
protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
    if (mVirtualViews == null || mVirtualViews.size() <= virtualViewId) {
        // TODO(clholgat): Remove this work around when the Android bug is fixed.
        // crbug.com/420177
        event.setContentDescription(PLACE_HOLDER_STRING);
        return;
    }
    VirtualView view = mVirtualViews.get(virtualViewId);

    event.setContentDescription(view.getAccessibilityDescription());
    event.setClassName(CompositorViewHolder.class.getName());
}
 

/** Utility method for announcing text via accessibility event. */
public static void announceText(String text, Context context) {
  AccessibilityManager accessibilityManager =
      (AccessibilityManager) context.getSystemService(Context.ACCESSIBILITY_SERVICE);
  if (accessibilityManager.isEnabled()) {
    AccessibilityEvent event = AccessibilityEvent.obtain(AccessibilityEvent.TYPE_ANNOUNCEMENT);
    event.setContentDescription(text);
    accessibilityManager.sendAccessibilityEvent(event);
  }
}
 

@Override
protected void populateEventForItem(RadialMenuItem item, AccessibilityEvent event) {
  event.setContentDescription(item.getTitle());
  event.setChecked(item.isChecked());
  event.setEnabled(item.isEnabled());
}
 

@Override
protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
    event.setContentDescription(getItemDescription(virtualViewId));
}
 

@Override
protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
    event.setContentDescription(getItemDescription(virtualViewId));
}
 

@CalledByNative
private void finishGranularityMove(String text, boolean extendSelection,
        int itemStartIndex, int itemEndIndex, boolean forwards) {
    if (mNativeObj == 0) return;

    // Prepare to send both a selection and a traversal event in sequence.
    AccessibilityEvent selectionEvent = buildAccessibilityEvent(mAccessibilityFocusId,
            AccessibilityEvent.TYPE_VIEW_TEXT_SELECTION_CHANGED);
    if (selectionEvent == null) return;
    AccessibilityEvent traverseEvent = buildAccessibilityEvent(mAccessibilityFocusId,
            AccessibilityEvent.TYPE_VIEW_TEXT_TRAVERSED_AT_MOVEMENT_GRANULARITY);
    if (traverseEvent == null) {
        selectionEvent.recycle();
        return;
    }

    // Update the cursor or selection based on the traversal. If it's an editable
    // text node, set the real editing cursor too.
    if (forwards) {
        mSelectionEndIndex = itemEndIndex;
    } else {
        mSelectionEndIndex = itemStartIndex;
    }
    if (!extendSelection) {
        mSelectionStartIndex = mSelectionEndIndex;
    }
    if (nativeIsEditableText(mNativeObj, mAccessibilityFocusId)
            && nativeIsFocused(mNativeObj, mAccessibilityFocusId)) {
        nativeSetSelection(mNativeObj, mAccessibilityFocusId,
                mSelectionStartIndex, mSelectionEndIndex);
    }

    // The selection event's "from" and "to" indices are just a cursor at the focus
    // end of the movement, or a selection if extendSelection is true.
    selectionEvent.setFromIndex(mSelectionStartIndex);
    selectionEvent.setToIndex(mSelectionStartIndex);
    selectionEvent.setItemCount(text.length());

    // The traverse event's "from" and "to" indices surround the item (e.g. the word,
    // etc.) with no whitespace.
    traverseEvent.setFromIndex(itemStartIndex);
    traverseEvent.setToIndex(itemEndIndex);
    traverseEvent.setItemCount(text.length());
    traverseEvent.setMovementGranularity(mSelectionGranularity);
    traverseEvent.setContentDescription(text);

    // The traverse event needs to set its associated action that triggered it.
    if (forwards) {
        traverseEvent.setAction(AccessibilityNodeInfo.ACTION_NEXT_AT_MOVEMENT_GRANULARITY);
    } else {
        traverseEvent.setAction(
                AccessibilityNodeInfo.ACTION_PREVIOUS_AT_MOVEMENT_GRANULARITY);
    }

    mView.requestSendAccessibilityEvent(mView, selectionEvent);
    mView.requestSendAccessibilityEvent(mView, traverseEvent);
}
 

@Override
protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
    event.setContentDescription(getDayDescription(virtualViewId));
}
 

@Override
protected void onPopulateEventForVirtualView(int virtualViewId, @NonNull AccessibilityEvent event) {
    event.setContentDescription(getItemDescription(virtualViewId));
}
 

@Override
protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
    event.setContentDescription(getItemDescription(virtualViewId));
}
 

@Override
protected void onPopulateEventForVirtualView(int virtualViewId, AccessibilityEvent event) {
    event.setContentDescription(getDayDescription(virtualViewId));
}