MainActivity¶

public class MainActivity extends AppCompatActivity¶

The MainActivity class contains, you guessed it, the main part of the code. This does basically EVERYTHING! It provides a UI, but that isn’t really functional anymore (I mean, you’re not going up with your high altitude balloon). It’s better explained in the chunks of code down below, because this whole thing is sort of an amalgamation of various bits of functionality and strokes of genius (maybe just strokes, idk).

Author:	Alan Zhu, Joshua Morin-Baxter

Fields¶

ACTION_USB_PERMISSION¶

public static final String ACTION_USB_PERMISSION¶

aLin_x¶

float aLin_x¶

aLin_y¶

float aLin_y¶

aLin_z¶

float aLin_z¶

accelerometer¶

Sensor accelerometer¶

accelerometer2¶

Sensor accelerometer2¶

accelerometer2Listener¶

SensorEventListener accelerometer2Listener¶

accelerometerListener¶

SensorEventListener accelerometerListener¶

actualA_x¶

float actualA_x¶

actualA_y¶

float actualA_y¶

actualA_z¶

float actualA_z¶

arduinoInRecent¶

String arduinoInRecent¶

captureCallback¶

Camera.PictureCallback captureCallback¶

ch¶

byte ch¶

connection¶

UsbDeviceConnection connection¶

course¶

float course¶

dataPointArrayList¶

ArrayList<DataPoint> dataPointArrayList¶

device¶

UsbDevice device¶

editText¶

EditText editText¶

ext_alt¶

float ext_alt¶

ext_altEST¶

float ext_altEST¶

ext_lat¶

float ext_lat¶

ext_lon¶

float ext_lon¶

ext_p¶

float ext_p¶

ext_rh¶

float ext_rh¶

ext_temp¶

float ext_temp¶

flash¶

Camera flash¶

gps_speed¶

float gps_speed¶

gravity¶

Sensor gravity¶

gravityListener¶

SensorEventListener gravityListener¶

gravity_x¶

float gravity_x¶

gravity_y¶

float gravity_y¶

gravity_z¶

float gravity_z¶

humidity¶

Sensor humidity¶

humidityListener¶

SensorEventListener humidityListener¶

iterReading¶

int iterReading¶

mMediaRecorder¶

MediaRecorder mMediaRecorder¶

mVideoCamera¶

Camera mVideoCamera¶

magnet¶

Sensor magnet¶

magnetListener¶

SensorEventListener magnetListener¶

magnetic_x¶

float magnetic_x¶

magnetic_y¶

float magnetic_y¶

magnetic_z¶

float magnetic_z¶

mainCamera¶

Camera mainCamera¶

nTexture¶

int nTexture¶

pAsInPressure¶

float pAsInPressure¶

pressure¶

Sensor pressure¶

pressureListener¶

SensorEventListener pressureListener¶

rCamera¶

Runnable rCamera¶

rSensors¶

Runnable rSensors¶

relativeHumidity¶

float relativeHumidity¶

rootTest¶

Button rootTest¶

rot_x¶

float rot_x¶

rot_y¶

float rot_y¶

rot_z¶

float rot_z¶

rotation¶

Sensor rotation¶

rotationListener¶

SensorEventListener rotationListener¶

runnableManager¶

final Handler runnableManager¶

sensorFileName¶

Date sensorFileName¶

serialPort¶

UsbSerialDevice serialPort¶

startButton¶

Button startButton¶

stoppedN¶

int stoppedN¶

tAsInTemperature¶

float tAsInTemperature¶

tMinusBackup¶

public long tMinusBackup¶

temperature¶

Sensor temperature¶

temperatureListener¶

SensorEventListener temperatureListener¶

textView¶

TextView textView¶

usbManager¶

UsbManager usbManager¶

useThisOne¶

SurfaceTexture useThisOne¶

Methods¶

flashLightOff¶

public void flashLightOff(View view)¶

This one turns the flashlight off if the flashlight is on. It’s not called because flashLightOn(View) doesn’t work either and isn’t called.

Parameters:	view – Just in case you wanted to open call this method with a UI button, but passing in null is fine.

flashLightOn¶

public void flashLightOn(View view)¶

A piece of code that wrestles control of the camera from the main photo-taking thread before turning on the camera flashlight on the back, in order to make the payload easier to find at night. It is not used primarily because it’s so difficult to implement interlacing between the main camera and this flashlight camera, but hopefully it can be fixed at some point.

Parameters:	view – Just in case you wanted to open call this method with a UI button, but passing in null is fine.

getBatteryPercentage¶

public static int getBatteryPercentage(Context context)¶

Gets the current battery to be used for rCamera and rSensors in determining battery saving and to be saved for data analysis

Parameters:	context – the context of the application from which battery stats can be pulled
Returns:	the current percentage of the battery

getBatteryTemp¶

public static int getBatteryTemp(Context context)¶

Gets battery temperature to determine delay of rCamera and rSensors and to be recorded for data analysis

Parameters:	context – the context of the application from which battery stats are to be pulled
Returns:	battery temperature (deciCelsius?)

giveCameraBackToOtherThread¶

public void giveCameraBackToOtherThread()¶: In life, sometimes you’ve got to return things you’ve taken forcefully. Control of the camera is no exception. This is like the yin to the takeCameraFromOtherThread()‘s yang. It makes the main camera active again and starts the rCamera runnable again.

hackInt¶

public int hackInt()¶

At some point, this was used in attempt to solve a problem with the camera of the Samsung Galaxy S4 in order to create SurfaceTextures from within a Runnable. It’s still used but not in the way it was originally intended.

Returns:	an id to be used to initialize SurfaceTextures from within a runnable

onClickClear¶

public void onClickClear(View view)¶

Clears both the text of the incoming messages and outgoing messages for Arduino connection, meaning that it is no longer used but can be revived along with everything else.

Parameters:	view – can be called with null, used to support button clicks

onCreate¶

protected void onCreate(Bundle savedInstanceState)¶

Creates the activity and all of its parts. Better to read it than write a description.

Parameters:	savedInstanceState – past to the super function, maintaining the saved instance state

onStart¶

protected void onStart()¶: Initializes sensors and other things that should not be done in onCreate

onStop¶

protected void onStop()¶: de-initializes sensors and things that should be destroyed before onDestroyed

record¶

public void record(View view)¶

Starts recording data and taking photos at the start of the activity and in testing with the UI. It changes rates depending on heat to avoid overheating the phone at altitude. Some of this is better to read than to describe.

Parameters:	view – Used to allow for UI interaction to start the recording

recordButton¶

public void recordButton()¶: starts a recording - but isn’t called at all right now

rootTest¶

public boolean rootTest()¶

Tests if the phone is rooted, although that is unimportant to the app as of now. This could be used to further exploit the abilities of the phone being used.

Returns:	True if root is available on the phone, False if not

setUiEnabled¶

public void setUiEnabled(boolean bool)¶

Code that enables/disables the Arduino connection UI. It is no longer used by the app but should be revived with the Arduino code when the time comes.

Parameters:	bool – state of the variables - if connected, it should be true

stopRecord¶

public void stopRecord(View view)¶

Stops all recording of sensors and photos.

Parameters:	view – to be used from UI

takeCameraFromOtherThread¶

public void takeCameraFromOtherThread()¶: This is the code that does the actual wrestling for flashLightOn(View). It kills the camera and opens it up to domination by another thread.