File list (Check if you may need any files):
widget\AbsListView.java
......\AbsoluteLayout.java
......\AbsSeekBar.java
......\AbsSpinner.java
......\Adapter.java
......\AdapterView.java
......\AlphabetIndexer.java
......\AnalogClock.java
......\ArrayAdapter.java
......\AutoCompleteTextView.java
......\BaseAdapter.java
......\BaseExpandableListAdapter.java
......\Button.java
......\Checkable.java
......\CheckBox.java
......\CheckedTextView.java
......\Chronometer.java
......\CompoundButton.java
......\CursorAdapter.java
......\CursorTreeAdapter.java
......\DatePicker.java
......\DialerFilter.java
......\DigitalClock.java
......\EditText.java
......\ExpandableListAdapter.java
......\ExpandableListView.java
......\Filter.java
......\Filterable.java
......\FilterQueryProvider.java
......\FrameLayout.java
......\Gallery.java
......\GridView.java
......\HeaderViewListAdapter.java
......\HorizontalScrollView.java
......\ImageButton.java
......\ImageSwitcher.java
......\ImageView.java
......\LinearLayout.java
......\ListAdapter.java
......\ListView.java
......\MediaController.java
......\MultiAutoCompleteTextView.java
......\PopupWindow.java
......\ProgressBar.java
......\RadioButton.java
......\RadioGroup.java
......\RatingBar.java
......\RelativeLayout.java
......\RemoteViews.java
......\ResourceCursorAdapter.java
......\ResourceCursorTreeAdapter.java
......\Scroller.java
......\ScrollView.java
......\SectionIndexer.java
......\SeekBar.java
......\SimpleAdapter.java
......\SimpleCursorAdapter.java
......\SimpleCursorTreeAdapter.java
......\SimpleExpandableListAdapter.java
......\SlidingDrawer.java
......\Spinner.java
......\SpinnerAdapter.java
......\TabHost.java
......\TableLayout.java
......\TableRow.java
......\TabWidget.java
......\TextSwitcher.java
......\TextView.java
......\TimePicker.java
......\Toast.java
......\ToggleButton.java
......\TwoLineListItem.java
......\VideoView.java
......\ViewAnimator.java
......\ViewFlipper.java
......\ViewSwitcher.java
......\WrapperListAdapter.java
......\ZoomButton.java
......\ZoomControls.java
widget