blackbox

blackbox is the android application to take video records while driving

• recording normal videos into today folder with start/stop button and auto start function
• when event button touched, make separate video with multiple camera snapshots, event video file contains GPS info in file name
• provides small monitor screen
• show car speed, and direction
• remove old normal video recording automatically if remaining space is small
• provides big home widget for easy launch

Screenshots and How to operate

Main Screen

• Display event record counts
• Display current date/time
• Display preview screen
• Display Compass
• Display current speed in Kilometer
• Start/Stop recording button
• Emergency Recoding button (with audio)
• Pause button
• Exit button

Home Widget

• Display event record counts (if none shows "ready")
• Display time in every 30 minutes
• Use to load application quickly

Permission Required

    <uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.RECORD_AUDIO" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
    <uses-permission android:name="android.permission.ACCESS_BACKGROUND_LOCATION" />
    <uses-permission android:name="android.permission.BLUETOOTH" />
    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />

Comments

Coded by

• Woncherl Ha - [email protected]

What I learned in this application

• Google GoogleApiClient
• onKeyDown : to accept bluetooth remote control
• AsyncTask : to merge mp4 files in separate task (normal saving and event saving) while recording
• SoundPool : to beep in some activities
• FragmentCompat.OnRequestPermissionsResultCallback camera.open, release power cable connection status
• MediaRecorder : recording, MEDIA_RECORDER_INFO_NEXT_OUTPUT_FILE_STARTED
• CameraDevice : supports MediaRecorder, Preview Screen, Screen shot simultaniously
• OBDII : access car bluetooth device

Updates / Changes

• 2021.05.05 : androidx applied, capture imageshot
• 2019.02.09 : README.md fully revised

Issues not fixed yet

• Unexpected shut down sometime (untracable), sorry :-p

Thanks all persons in GitHub for good examples.