android.support.v4.view.accessibility.AccessibilityNodeInfoCompat#setChecked ( )源码实例Demo

@Override
protected void onPopulateNodeForVirtualView(int virtualViewId, AccessibilityNodeInfoCompat node) {
    final boolean hasBounds = getBoundsForDay(virtualViewId, mTempRect);

    if (!hasBounds) {
        // The day is invalid, kill the node.
        mTempRect.setEmpty();
        node.setContentDescription("");
        node.setBoundsInParent(mTempRect);
        node.setVisibleToUser(false);
        return;
    }

    node.setText(getDayText(virtualViewId));
    node.setContentDescription(getDayDescription(virtualViewId));
    node.setBoundsInParent(mTempRect);

    final boolean isDayEnabled = isDayEnabled(virtualViewId);
    if (isDayEnabled) {
        node.addAction(AccessibilityNodeInfoCompat.ACTION_CLICK);
    }

    node.setEnabled(isDayEnabled);

    if (mActivatedDays.isValid() && mActivatedDays.isActivated(virtualViewId)) {
        // TODO: This should use activated once that's supported.
        node.setChecked(true);
    }
}
 

@Override
protected void onPopulateNodeForVirtualView(int virtualViewId, AccessibilityNodeInfoCompat node) {
    final boolean hasBounds = getBoundsForDay(virtualViewId, mTempRect);

    if (!hasBounds) {
        // The day is invalid, kill the node.
        mTempRect.setEmpty();
        node.setContentDescription("");
        node.setBoundsInParent(mTempRect);
        node.setVisibleToUser(false);
        return;
    }

    node.setText(getDayText(virtualViewId));
    node.setContentDescription(getDayDescription(virtualViewId));
    node.setBoundsInParent(mTempRect);

    final boolean isDayEnabled = isDayEnabled(virtualViewId);
    if (isDayEnabled) {
        node.addAction(AccessibilityActionCompat.ACTION_CLICK);
    }

    node.setEnabled(isDayEnabled);

    if (virtualViewId == mActivatedDay) {
        // TODO: This should use activated once that's supported.
        node.setChecked(true);
    }

}
 

@Override
protected void onPopulateNodeForVirtualView(
        int virtualViewId, AccessibilityNodeInfoCompat node) {
    final CustomItem item = getItem(virtualViewId);
    if (item == null) {
        throw new IllegalArgumentException("Invalid virtual view id");
    }

    // Node and event text and content descriptions are usually
    // identical, so we'll use the exact same string as before.
    node.setText(item.description);

    // Reported bounds should be consistent with those used to draw
    // the item in onDraw(). They should also be consistent with the
    // hit detection performed in getVirtualViewAt() and
    // onTouchEvent().
    final Rect bounds = mTempRect;
    final int height = getHeight();
    final int width = getWidth();
    scaleRectF(item.bounds, bounds, width, height);
    node.setBoundsInParent(bounds);

    // Since the user can tap an item, add the CLICK action. We'll
    // need to handle this later in onPerformActionForVirtualView.
    node.addAction(AccessibilityNodeInfoCompat.ACTION_CLICK);

    // This item has a checked state.
    node.setCheckable(true);
    node.setChecked(item.checked);
}