ca.yorku.cse.mack.fittsdraganddrop

Class FittsDragAndDropActivity

java.lang.Object

android.content.Context

android.content.ContextWrapper

android.view.ContextThemeWrapper

android.app.Activity

ca.yorku.cse.mack.fittsdraganddrop.FittsDragAndDropActivity

All Implemented Interfaces:

android.content.ComponentCallbacks, android.content.ComponentCallbacks2, android.media.MediaPlayer.OnCompletionListener, android.view.KeyEvent.Callback, android.view.LayoutInflater.Factory, android.view.LayoutInflater.Factory2, android.view.View.OnCreateContextMenuListener, android.view.View.OnTouchListener, android.view.Window.Callback

public class FittsDragAndDropActivity
extends android.app.Activity
implements android.view.View.OnTouchListener, android.media.MediaPlayer.OnCompletionListener

FittsDragAndDrop

Summary

• Android experiment software for evaluating touch-based or stylus-based drag-and-drop actions using Fitts' law.

• Implements both the two-dimensional (2D) and one-dimensional (1D) tasks described in ISO 9241-9 (updated in 2012 as ISO/TC 9241-411).

• Includes options to tailor the app to children. In this case, the targets are animals and the object to drag is an apple which is "fed" to the animals.

• User performance data gathered and saved in output files for follow-up analyses.

Related References

The following publications present research where this software was used:

• (a paper is coming soon; stay tuned)

The following publications provide background information on Fitts' law and experimental testing using the Fitts' paradigm.

• "Fitts' law", by MacKenzie (Wiley Handbook of Human-Computer Interaction 2018).

• "Towards a Standard for Pointing Device Evaluation: Perspectives on 27 Years of Fitts' Law Research in HCI", by Soukoreff and MacKenzie (IJHCS 2004).

• "Fitts' Law as a Research and Design Tool in Human-Computer Interaction", by MacKenzie (HCI 1992).

Setup Parameters

Upon launching, the program presents a setup dialog:

The parameters are embedded in the application. The default settings (shown) may be changed by selecting the corresponding spinner. Changes may be saved. Saved changes become the default settings when the application is next launched.

The setup parameters are as follows:

Parameter	Description
Participant code	Identifies the current participant.
Session code	Identifies the session. This code is useful if testing proceeds over multiple sessions to gauge the progression of learning.
Block code (auto)	Identifies the block of testing. This code is generated automatically. The first block of testing is "B01", then "B02", and so on. Output data files include the block code in the filename. The first available block code is used in opening data files for output. This prevents overwriting data from an earlier block of testing.
Group code	Identifies the group to which the participant was assigned. This code is needed if counterbalancing was used (i.e., participants were assigned to groups to offset order effects). This is common practice for testing the levels of a within-subjects independent variable.
Condition code	An arbitrary code to associate a test condition with a block of trials. This parameter might be useful if the user study includes conditions that are not inherently part of the application (e.g., Gender → male, female; User stance → sitting, standing, walking).
Mode	Set to either "1D" or "2D" to control whether the task is one-dimensional or two-dimensional.
NOTE: The setup parameters above appear in the filename for the output data files (e.g., FittsDragAndDrop-P01-S01-B01-G01-C01-1D.sd1). They also appear as data columns in the output data files.
Number of trials (1D)	Specifies the number of back-and-forth selections in a block of trials. This setup parameter is only relevant if Mode = 1D.
Number of targets (2D)	Specifies the number of targets that appear in the layout circle. This setup parameter is only relevant if Mode = 2D.
Target amplitude (A)	Specifies either the diameter of the layout circle (2D) or the center-to-center distance between targets (1D). The spinner offers several choices (but see note 2 below).
Target width (W)	Specifies the width of targets. This is either the diameter of the target circles (2D) or the width of the rectangles (1D). The spinner offers several choices (but see note 2 below). Notes: 1. The total number of A-W conditions (sequences) in a block is n × m, where n is the number of target amplitudes and m is the number of target widths. 2. The A-W values are scaled such that the widest condition (largest A, largest W) spans the device's display with minus 1/16 inch on each side.
Vibrotactile feedback	A checkbox parameter. If checked, a 10 ms vibrotactile pulse is emitted if a target is selected in error (i.e., the finger-up action is outside the target).
Audio feedback	A checkbox parameter. If checked, an auditory beep is heard if a target is selected in error (i.e., the finger-up action is outside the target).
Speech feedback	A checkbox parameter. This option is for use with children. See "Using FittsDragAndDrop With Children" below.
FittsFarm style	A checkbox parameter. This option is for use with children. See "Using FittsDragAndDrop With Children" below.
Show all targets	A checkbox parameter. If checked, all targets appear. This is the default option. See "Operation", below. If unchecked, only the drag object and the target appear, as shown below.

Operation

Once the setup parameters are chosen, the testing begins by tapping "OK". The first screen to appear is a transition screen to ensure the participant is ready (below, left). Once the blue circle is tapped, the first test condition appears. Examples are shown below for the 2D task (below, center) and the 1D task (below, right).

The participant selects targets using drag-and-drop operations. Each trial requires a drag operation between a "from" target and a "to" target. The drag object appears in the "from" target as a black circle, which is either 1/4 inch wide or the width of the smallest target in the block, whichever is less. The drag object is acquired by a finger-down or stylus-down action. A down-action anywhere within the "from" target circle is sufficient to acquire the drag object. When acquired, the drag object snaps to the location of the finger-down or stylus-down action. The drag object is then dragged to the "to" target and dropped by a finger-up or stylus-up action. A "tick" audio sound is heard on finger-up or stylus-up (if audio feedback is enabled).

While dragging, a gradient heat map appears at the location of finger or stylus contact on the display. This provides additional visual feedback for the dragging operation. See below.

For the 2D mode, drag-and-drops proceed in a pattern moving around the layout circle. Each "from" target is the last "to" target. Each new "to" target is beside the last "from" target, so as to proceed around the layout circle. For the 1D mode, drag-and-drops proceed back and forth until the specified number of selections have occurred.

Timing for a sequence begins on the first up-action (on the first target) and ends on the last up-action (on the last target). Bear in mind that participants should not pause between drag-and-drop operations, because the time for each trial begins on the finger-up or stylus-up action that ended the previous trial. This is consistent with the "serial tapping task" paradigm used in Fitts' law experiments.

Each trial must begin correctly, which is to say, the finger- or stylus-down action must be within the "from" target where the drag object appears. Errors at the end of trials are permitted, however. If the finger- or stylus-up action is outside the "to" target, the trial ends, an error is logged, and an auditory beep and vibrotactile pulse are emitted (if the corresponding options are selected). The only requirement is that for each trial the movement distance in the direction of the "to" target must be at least half the required movement distance. This is implemented to avoid severe outliers, which occur, for example, if the participant "drops" a target immediately upon acquiring it or perhaps inadvertently does a double-selection. If a outlier trial is detected, a popup dialog appears and the sequence must be restarted. The number of such events appears as a "sequence repeat count" in the sd2 output data file.

A series of trials for a single A-W condition is called a "sequence". At the end of each sequence, results appear on the display. See below:

Once all the A-W conditions in a block are finished, user performance data are saved in files and the application returns to the setup dialog. The data files are located in the device's public storage directory in a folder named FittsDragAndDropData.

Using FittsDragAndDrop With Children

The original inspiration for FittsDragAndDrop was a Flash application called Fitts Farm, developed by Brendan Cassidy and Janet Read of the ChiCi research group at the University of Central Lancashire in the UK. To engage children in mobile interaction and, in particular, drag-and-drop interactions, the Fitts Farm application was designed with a game-like appeal. Children are asked to feed farm animals. This is done by dragging graphical apples on to graphical animals and dropping the apple on the image of the animal.

FittsDragAndDrag has two setup options to configure the interaction to suit research with children. If the "Fitts Farm style" checkbox option is selected, the introductory screen announces that there are animals in need of feeding (below, left). Another option, "Speech feedback", adds (annoying!) speech feedback about the animals being hungry, etc.

In the style of Fitts Farm, an apple is used as the drag object and a graphic image of an animal appears in the target circle (above, right). The animal image is resized to fill the target circle. The application includes about 15 animal images:

The target image changes randomly from trial to trial.

Output Data Files

For each block of testing, three output data files are created: sd1, sd2, and sd3. ("sd" is for "summary data".) The data are comma delimited for easy importing into a spreadsheet or statistics program.

sd1 Output File

The sd1 file contains one line per trial. The columns contain the following data:

      Participant - participant code
      Session - session code
      Block - block code
      Group - group code
      Condition - condition code
      Mode - mode code (1D or 2D)
      Trial - trial number
      A - target amplitude
      W - target width
      FromX - x coordinate of center of from-target
      FromY - y coordinate of center of from-target
      TargetX - x coordinate of center of to-target
      TargetY - y coordinate of center of to-target
      FingerDownX - x coordinate of finger-down event at end of trial
      FingerDownY - y coordinate of finger-down event at end of trial
      SelectX - x coordinate of finger-up event at end of trial (target selection)
      SelectY - y coordinate of finger-up event at end of trial (target selection)
      xDelta - (see below)
      FingerDownUpDelta - Pythagorean distance between finger-down and finger-up events
      FingerDownUpTime - time in ms between finger-down and finger-up events
      DistanceFromTargetCenter - Pythagorean distance from selection coordinate to target center
      PickupMisses - number of times the drag object was missed at the beginning of trial
      Error - 0 = target selected, 1 = target missed
      MT - movement time in ms for the trial
 

Note: All sizes, distances, and coordinates are in pixel units for the test device.

xDelta is the x-distance from the finger-up coordinate to the center of the target. It is normalized relative to the center of the target and to the task axis. For example, xDelta = 1 is the equivalent of a one-pixel overshoot while xDelta = −1 is the equivalent of a one-pixel undershoot. Note that xDelta = 0 does not mean selection was precisely at the centre of the target. It means the selection was on a line orthogonal to the task axis going through the centre of the target. This is consistent with the inherently one-dimensional nature of Fitts' law.

xDelta is important for calculating Fitts' throughput. The standard deviation in the xDelta values collected over a sequence of trials is SD_x. This is used in the calculation of throughput (TP) as follows:

W_e = 4.133 × SD_x

ID_e = log₂(A_e / W_e + 1)

TP = ID_e / MT

sd2 Output File

The sd2 file contains one line per sequence. The columns contain the following data:

      Participant - participant code
      Session - session code
      Block - block code
      Group - group code
      Condition - condition code
      Mode - mode code (1D or 2D)
      Trials - number of trials in the sequence
      A - specified target amplitude
      W - specified target width
      ID - specified index of difficulty
      Ae - actual or effective movement amplitude (*)
      We - actual or effective target width (*)
      IDe - actual or effective index of difficulty (*)
      PickupMisses - number of times the drag object was missed at the beginning of a trial (*)
      SequenceRepeatCount - number of times the sequence was repeated (see below) (*)
      MT - mean movement time in ms over all trials in the sequence (*)
      ErrorRate - error rate (%) (*)
      TP - Fitts' throughput in bits per second (*)
 

The entries above with asterisks (*) are user performance measures. These reflect how the user actually performed while doing the sequence of trials. The measures most commonly used as dependent variables in Fitts' law experiments are the last three: movement time, error rate, and throughput.

The SequenceRepeatCount is used in conjunction with the outlier criterion described above. No data are saved for an outlier sequence. However, the SequenceRepeatCount entry in the sd2 file indicates the number of times the sequence was repeated due to the outlier criterion. Usually, SequenceRepeatCount = 0 (hopefully!).

sd3 Output Data

The sd3 file contains trace data for the path of finger or stylus movement while dragging. For each trial, the on-going timestamps, x coordinates, and y coordinates are collected and saved. A separate desktop utility, FittsTrace, facilitates viewing the trace data.

The following are examples of "sd" (summary data) files:

• sd1 example
• sd2 example
• sd3 example

Actual output files use "FittsDragAndDrop" as the base filename. This is followed by the participant code, the session code, the block code, the group code, the condition code, and the mode, for example, FittsDragAndDrop-P01-S01-B01-G01-C01-1D.sd1.

In most cases, the sd2 data files are the primary files used for data analyses in an experimental evaluation. The data in the sd2 files are full-precision, comma-delimited, to facilitate importing into a spreadsheet or statistics application. Below is an example for the sd2 file above, after importing into Microsoft Excel: (click to enlarge)

When using this application in an experiment, it is a good idea to terminate all other applications and to disable the system's WiFi and Bluetooth transceivers. This will maintain the integrity of the data collected and ensure that the application runs without hesitations.

Author:

(c) Scott MacKenzie, 2018

Field Summary

Fields inherited from class android.app.Activity

DEFAULT_KEYS_DIALER, DEFAULT_KEYS_DISABLE, DEFAULT_KEYS_SEARCH_GLOBAL, DEFAULT_KEYS_SEARCH_LOCAL, DEFAULT_KEYS_SHORTCUT, FOCUSED_STATE_SET, RESULT_CANCELED, RESULT_FIRST_USER, RESULT_OK

Fields inherited from class android.content.Context

ACCESSIBILITY_SERVICE, ACCOUNT_SERVICE, ACTIVITY_SERVICE, ALARM_SERVICE, APP_OPS_SERVICE, APPWIDGET_SERVICE, AUDIO_SERVICE, BATTERY_SERVICE, BIND_ABOVE_CLIENT, BIND_ADJUST_WITH_ACTIVITY, BIND_ALLOW_OOM_MANAGEMENT, BIND_AUTO_CREATE, BIND_DEBUG_UNBIND, BIND_EXTERNAL_SERVICE, BIND_IMPORTANT, BIND_NOT_FOREGROUND, BIND_WAIVE_PRIORITY, BLUETOOTH_SERVICE, CAMERA_SERVICE, CAPTIONING_SERVICE, CARRIER_CONFIG_SERVICE, CLIPBOARD_SERVICE, CONNECTIVITY_SERVICE, CONSUMER_IR_SERVICE, CONTEXT_IGNORE_SECURITY, CONTEXT_INCLUDE_CODE, CONTEXT_RESTRICTED, DEVICE_POLICY_SERVICE, DISPLAY_SERVICE, DOWNLOAD_SERVICE, DROPBOX_SERVICE, FINGERPRINT_SERVICE, HARDWARE_PROPERTIES_SERVICE, INPUT_METHOD_SERVICE, INPUT_SERVICE, JOB_SCHEDULER_SERVICE, KEYGUARD_SERVICE, LAUNCHER_APPS_SERVICE, LAYOUT_INFLATER_SERVICE, LOCATION_SERVICE, MEDIA_PROJECTION_SERVICE, MEDIA_ROUTER_SERVICE, MEDIA_SESSION_SERVICE, MIDI_SERVICE, MODE_APPEND, MODE_ENABLE_WRITE_AHEAD_LOGGING, MODE_MULTI_PROCESS, MODE_NO_LOCALIZED_COLLATORS, MODE_PRIVATE, MODE_WORLD_READABLE, MODE_WORLD_WRITEABLE, NETWORK_STATS_SERVICE, NFC_SERVICE, NOTIFICATION_SERVICE, NSD_SERVICE, POWER_SERVICE, PRINT_SERVICE, RESTRICTIONS_SERVICE, SEARCH_SERVICE, SENSOR_SERVICE, SHORTCUT_SERVICE, STORAGE_SERVICE, SYSTEM_HEALTH_SERVICE, TELECOM_SERVICE, TELEPHONY_SERVICE, TELEPHONY_SUBSCRIPTION_SERVICE, TEXT_SERVICES_MANAGER_SERVICE, TV_INPUT_SERVICE, UI_MODE_SERVICE, USAGE_STATS_SERVICE, USB_SERVICE, USER_SERVICE, VIBRATOR_SERVICE, WALLPAPER_SERVICE, WIFI_P2P_SERVICE, WIFI_SERVICE, WINDOW_SERVICE

Fields inherited from interface android.content.ComponentCallbacks2

TRIM_MEMORY_BACKGROUND, TRIM_MEMORY_COMPLETE, TRIM_MEMORY_MODERATE, TRIM_MEMORY_RUNNING_CRITICAL, TRIM_MEMORY_RUNNING_LOW, TRIM_MEMORY_RUNNING_MODERATE, TRIM_MEMORY_UI_HIDDEN

Constructor Summary

Constructors

Constructor and Description
FittsDragAndDropActivity()

Method Summary

Modifier and Type	Method and Description
void	doDragObject(float xArg, float yArg)
void	doDragObjectBegin(float xArg, float yArg)
void	doStartCircleSelected()
int	getCurrentRotation()
int	getDefaultOrientation()
void	onCompletion(android.media.MediaPlayer mp)
void	onCreate(android.os.Bundle savedInstanceState)
void	onStop()
boolean	onTouch(android.view.View v, android.view.MotionEvent me)

Methods inherited from class android.app.Activity

addContentView, closeContextMenu, closeOptionsMenu, createPendingResult, dismissDialog, dismissKeyboardShortcutsHelper, dispatchGenericMotionEvent, dispatchKeyEvent, dispatchKeyShortcutEvent, dispatchPopulateAccessibilityEvent, dispatchTouchEvent, dispatchTrackballEvent, dump, enterPictureInPictureMode, findViewById, finish, finishActivity, finishActivityFromChild, finishAffinity, finishAfterTransition, finishAndRemoveTask, finishFromChild, getActionBar, getApplication, getCallingActivity, getCallingPackage, getChangingConfigurations, getComponentName, getContentScene, getContentTransitionManager, getCurrentFocus, getFragmentManager, getIntent, getLastNonConfigurationInstance, getLayoutInflater, getLoaderManager, getLocalClassName, getMediaController, getMenuInflater, getParent, getParentActivityIntent, getPreferences, getReferrer, getRequestedOrientation, getSearchEvent, getSystemService, getTaskId, getTitle, getTitleColor, getVoiceInteractor, getVolumeControlStream, getWindow, getWindowManager, hasWindowFocus, invalidateOptionsMenu, isChangingConfigurations, isChild, isDestroyed, isFinishing, isImmersive, isInMultiWindowMode, isInPictureInPictureMode, isLocalVoiceInteractionSupported, isTaskRoot, isVoiceInteraction, isVoiceInteractionRoot, managedQuery, moveTaskToBack, navigateUpTo, navigateUpToFromChild, onActionModeFinished, onActionModeStarted, onActivityReenter, onActivityResult, onApplyThemeResource, onAttachedToWindow, onAttachFragment, onBackPressed, onChildTitleChanged, onConfigurationChanged, onContentChanged, onContextItemSelected, onContextMenuClosed, onCreate, onCreateContextMenu, onCreateDescription, onCreateDialog, onCreateDialog, onCreateNavigateUpTaskStack, onCreateOptionsMenu, onCreatePanelMenu, onCreatePanelView, onCreateThumbnail, onCreateView, onCreateView, onDestroy, onDetachedFromWindow, onEnterAnimationComplete, onGenericMotionEvent, onKeyDown, onKeyLongPress, onKeyMultiple, onKeyShortcut, onKeyUp, onLocalVoiceInteractionStarted, onLocalVoiceInteractionStopped, onLowMemory, onMenuItemSelected, onMenuOpened, onMultiWindowModeChanged, onNavigateUp, onNavigateUpFromChild, onNewIntent, onOptionsItemSelected, onOptionsMenuClosed, onPanelClosed, onPause, onPictureInPictureModeChanged, onPostCreate, onPostCreate, onPostResume, onPrepareDialog, onPrepareDialog, onPrepareNavigateUpTaskStack, onPrepareOptionsMenu, onPreparePanel, onProvideAssistContent, onProvideAssistData, onProvideKeyboardShortcuts, onProvideReferrer, onRequestPermissionsResult, onRestart, onRestoreInstanceState, onRestoreInstanceState, onResume, onRetainNonConfigurationInstance, onSaveInstanceState, onSaveInstanceState, onSearchRequested, onSearchRequested, onStart, onStateNotSaved, onTitleChanged, onTouchEvent, onTrackballEvent, onTrimMemory, onUserInteraction, onUserLeaveHint, onVisibleBehindCanceled, onWindowAttributesChanged, onWindowFocusChanged, onWindowStartingActionMode, onWindowStartingActionMode, openContextMenu, openOptionsMenu, overridePendingTransition, postponeEnterTransition, recreate, registerForContextMenu, releaseInstance, removeDialog, reportFullyDrawn, requestDragAndDropPermissions, requestPermissions, requestShowKeyboardShortcuts, requestVisibleBehind, requestWindowFeature, runOnUiThread, setActionBar, setContentTransitionManager, setContentView, setContentView, setContentView, setDefaultKeyMode, setEnterSharedElementCallback, setExitSharedElementCallback, setFeatureDrawable, setFeatureDrawableAlpha, setFeatureDrawableResource, setFeatureDrawableUri, setFinishOnTouchOutside, setImmersive, setIntent, setMediaController, setProgress, setProgressBarIndeterminate, setProgressBarIndeterminateVisibility, setProgressBarVisibility, setRequestedOrientation, setResult, setResult, setSecondaryProgress, setTaskDescription, setTheme, setTitle, setTitle, setTitleColor, setVisible, setVolumeControlStream, setVrModeEnabled, shouldShowRequestPermissionRationale, shouldUpRecreateTask, showAssist, showDialog, showDialog, showLockTaskEscapeMessage, startActionMode, startActionMode, startActivities, startActivities, startActivity, startActivity, startActivityForResult, startActivityForResult, startActivityFromChild, startActivityFromChild, startActivityFromFragment, startActivityFromFragment, startActivityIfNeeded, startActivityIfNeeded, startIntentSender, startIntentSender, startIntentSenderForResult, startIntentSenderForResult, startIntentSenderFromChild, startIntentSenderFromChild, startLocalVoiceInteraction, startLockTask, startManagingCursor, startNextMatchingActivity, startNextMatchingActivity, startPostponedEnterTransition, startSearch, stopLocalVoiceInteraction, stopLockTask, stopManagingCursor, takeKeyEvents, triggerSearch, unregisterForContextMenu

Methods inherited from class android.view.ContextThemeWrapper

applyOverrideConfiguration, attachBaseContext, getAssets, getResources, getTheme

Methods inherited from class android.content.ContextWrapper

bindService, checkCallingOrSelfPermission, checkCallingOrSelfUriPermission, checkCallingPermission, checkCallingUriPermission, checkPermission, checkSelfPermission, checkUriPermission, checkUriPermission, clearWallpaper, createConfigurationContext, createDeviceProtectedStorageContext, createDisplayContext, createPackageContext, databaseList, deleteDatabase, deleteFile, deleteSharedPreferences, enforceCallingOrSelfPermission, enforceCallingOrSelfUriPermission, enforceCallingPermission, enforceCallingUriPermission, enforcePermission, enforceUriPermission, enforceUriPermission, fileList, getApplicationContext, getApplicationInfo, getBaseContext, getCacheDir, getClassLoader, getCodeCacheDir, getContentResolver, getDatabasePath, getDataDir, getDir, getExternalCacheDir, getExternalCacheDirs, getExternalFilesDir, getExternalFilesDirs, getExternalMediaDirs, getFilesDir, getFileStreamPath, getMainLooper, getNoBackupFilesDir, getObbDir, getObbDirs, getPackageCodePath, getPackageManager, getPackageName, getPackageResourcePath, getSharedPreferences, getSystemServiceName, getWallpaper, getWallpaperDesiredMinimumHeight, getWallpaperDesiredMinimumWidth, grantUriPermission, isDeviceProtectedStorage, isRestricted, moveDatabaseFrom, moveSharedPreferencesFrom, openFileInput, openFileOutput, openOrCreateDatabase, openOrCreateDatabase, peekWallpaper, registerReceiver, registerReceiver, removeStickyBroadcast, removeStickyBroadcastAsUser, revokeUriPermission, sendBroadcast, sendBroadcast, sendBroadcastAsUser, sendBroadcastAsUser, sendOrderedBroadcast, sendOrderedBroadcast, sendOrderedBroadcastAsUser, sendStickyBroadcast, sendStickyBroadcastAsUser, sendStickyOrderedBroadcast, sendStickyOrderedBroadcastAsUser, setWallpaper, setWallpaper, startInstrumentation, startService, stopService, unbindService, unregisterReceiver

Methods inherited from class android.content.Context

getColor, getColorStateList, getDrawable, getString, getString, getSystemService, getText, obtainStyledAttributes, obtainStyledAttributes, obtainStyledAttributes, obtainStyledAttributes, registerComponentCallbacks, unregisterComponentCallbacks

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

FittsDragAndDropActivity

public FittsDragAndDropActivity()

Method Detail

onCreate

public void onCreate(android.os.Bundle savedInstanceState)

Overrides:

onCreate in class android.app.Activity

onStop

public void onStop()

Overrides:

onStop in class android.app.Activity

onCompletion

public void onCompletion(android.media.MediaPlayer mp)

Specified by:

onCompletion in interface android.media.MediaPlayer.OnCompletionListener

onTouch

public boolean onTouch(android.view.View v,
                       android.view.MotionEvent me)

Specified by:

onTouch in interface android.view.View.OnTouchListener

doDragObjectBegin

public void doDragObjectBegin(float xArg,
                              float yArg)

doDragObject

public void doDragObject(float xArg,
                         float yArg)

doStartCircleSelected

public void doStartCircleSelected()

getDefaultOrientation

public int getDefaultOrientation()

getCurrentRotation

public int getCurrentRotation()