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as the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted).
[C-1-7] MUST have a total harmonic distortion (THD) less than be less than 1% for 1 kHZ
at 90 dB SPL input level at each and every microphone used to record the unprocessed
audio source.
MUST not have any other signal processing (e.g. Automatic Gain Control, High Pass Filter,
or Echo cancellation) in the path other than a level multiplier to bring the level to desired
range. In other words:
[C-1-8] If any signal processing is present in the architecture for any reason, it MUST be
disabled and effectively introduce zero delay or extra latency to the signal path.
[C-1-9] The level multiplier, while allowed to be on the path, MUST NOT introduce delay or
latency to the signal path.
All SPL measurements are made directly next to the microphone under test. For multiple microphone
configurations, these requirements apply to each microphone.
If device implementations declare android.hardware.microphone but do not support unprocessed audio
source, they:
[C-2-1] MUST return null for the
AudioManager.getProperty(PROPERTY_SUPPORT_AUDIO_SOURCE_UNPROCESSED) API method,
to properly indicate the lack of support.
[SR] are still STRONGLY RECOMMENDED to satisfy as many of the requirements for the
signal path for the unprocessed recording source.
6. Developer Tools and Options Compatibility
6.1. Developer Tools
Device implementations:
[C-0-1] MUST support the Android Developer Tools provided in the Android SDK.
Android Debug Bridge (adb)
[C-0-2] MUST support adb as documented in the Android SDK and the shell
commands provided in the AOSP, which can be used by app developers,
including dumpsys and cmd stats .
[C-0-3] MUST NOT alter the format or the contents of device system events
(batterystats , diskstats, fingerprint, graphicsstats, netstats, notification,
procstats) logged via the dumpsys command.
[C-0-10] MUST record, without omission, and make the following events
accessible and available to the cmd stats shell command and the StatsManager
System API class.
ActivityForegroundStateChanged
AnomalyDetected
AppBreadcrumbReported
AppCrashOccurred
AppStartOccurred
BatteryLevelChanged
BatterySaverModeStateChanged
BleScanResultReceived
BleScanStateChanged
ChargingStateChanged
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Содержание
- Android 9 1
- Compatibility definition 1
- Android extensions 2
- Android library 2
- Api behavioral compatibility 2
- Api namespaces 2
- Automotive requirements 2
- Background restriction 2
- Device configurations 2
- Device types 2
- Document structure 2
- Handheld requirements 2
- Introduction 2
- Managed api compatibility 2
- Native api compatibility 2
- Runtime compatibility 2
- Soft api compatibility 2
- Software 2
- Tablet requirements 2
- Television requirements 2
- User interface compatibility 2
- Watch requirements 2
- Web compatibility 2
- Accessibility 3
- Application packaging compatibility 3
- Audio latency 3
- Audio playback 3
- Audio recording 3
- Capture for unprocessed 3
- Companion device pairing 3
- Developer options 3
- Developer tools 3
- Developer tools and options compatibility 3
- Device administration 3
- Display and graphics 3
- Hardware compatibility 3
- Heavyweight apps 3
- Instant apps 3
- Managed user support 3
- Media codecs 3
- Media ui 3
- Multimedia compatibility 3
- Musical instrument digital interface midi 3
- Network protocols 3
- Professional audio 3
- Quick settings 3
- Secure media 3
- Text to speech 3
- Tv input framework 3
- Video decoding 3
- Video encoding 3
- Cameras 4
- Data connectivity 4
- Input devices 4
- Memory and storage 4
- Pose sensor 4
- Sensors 4
- Contact us 5
- Document changelog 5
- Performance and power 5
- Security model compatibility 5
- Software compatibility testing 5
- Updatable software 5
- Document structure 6
- Introduction 6
- Requirement id 6
- Requirements by device type 6
- Device configurations 7
- Device types 7
- Handheld requirements 7
- Hardware 7
- Requirement id in section 2 7
- Multimedia 10
- Software 11
- Performance and power 12
- Security model 13
- Television requirements 13
- Hardware 14
- Multimedia 15
- Software 16
- Performance and power 17
- Hardware 18
- Multimedia 18
- Software 18
- Watch requirements 18
- Automotive requirements 19
- Hardware 19
- Performance and power 19
- Multimedia 22
- Software 22
- Performance and power 23
- Hardware 24
- Security model 24
- Software 24
- Tablet requirements 24
- Android extensions 25
- Android library 25
- Managed api compatibility 25
- Build parameters 26
- Permissions 26
- Soft api compatibility 26
- Intent compatibility 29
- Activities on secondary displays 31
- Application binary interfaces 32
- Native api compatibility 32
- Bit arm native code compatibility 33
- Browser compatibility 34
- Web compatibility 34
- Webview compatibility 34
- Api behavioral compatibility 35
- Api namespaces 36
- Background restriction 36
- Runtime compatibility 37
- Launcher home screen 39
- User interface compatibility 39
- Notifications 40
- Widgets 40
- Alerts and toasts 42
- Search 42
- Live wallpapers 43
- Themes 43
- Activity switching 44
- Input management 44
- Lock screen media control 44
- Location 45
- Multi windows 45
- Screen savers previously dreams 45
- Unicode and font 45
- Device administration 46
- Display cutout 46
- Device provisioning 47
- Managed profile support 48
- Accessibility 49
- Managed user support 49
- Text to speech 49
- Instant apps 50
- Media ui 50
- Quick settings 50
- Tv input framework 50
- Application packaging compatibility 51
- Companion device pairing 51
- Heavyweight apps 51
- Multimedia compatibility 52
- Audio decoding 53
- Audio encoding 53
- Media codecs 53
- Audio codecs details 54
- Image decoding 55
- Image encoding 55
- Image codecs details 56
- Video codecs 56
- Video codecs list 56
- Video encoding 57
- Mpeg 2 59
- Mpeg 4 59
- Video decoding 59
- H 65 hevc 60
- Audio recording 61
- Raw audio capture 61
- Capture for rerouting of playback 62
- Capture for voice recognition 62
- Audio effects 63
- Audio latency 63
- Audio output volume 63
- Audio playback 63
- Raw audio playback 63
- Network protocols 65
- Musical instrument digital interface midi 66
- Professional audio 66
- Secure media 66
- Capture for unprocessed 68
- Developer tools 69
- Developer tools and options compatibility 69
- Developer options 71
- Display and graphics 71
- Hardware compatibility 71
- Screen configuration 72
- D and 3d graphics acceleration 74
- Display metrics 74
- Screen orientation 74
- Legacy application compatibility mode 77
- Screen technology 77
- Secondary displays 77
- Input devices 78
- Keyboard 78
- Navigation keys 78
- Non touch navigation 78
- Touchscreen input 79
- Fake touch input 80
- Game controller support 81
- Remote control 82
- Sensors 82
- Accelerometer 83
- Magnetometer 84
- Gyroscope 86
- Barometer 87
- Photometer 87
- Thermometer 87
- High fidelity sensors 88
- Proximity sensor 88
- Biometric sensors 90
- Android automotive only sensors 92
- Data connectivity 93
- Pose sensor 93
- Telephony 93
- Ieee 802 1 wi fi 94
- Bluetooth 97
- Near field communications 98
- Minimum network capability 100
- Cameras 101
- Data saver 101
- Rear facing camera 101
- Secure elements 101
- Sync settings 101
- Front facing camera 102
- Camera api behavior 103
- External camera 103
- Camera orientation 104
- Memory and storage 104
- Application shared storage 105
- Minimum memory and storage 105
- Adoptable storage 106
- Usb peripheral mode 106
- Usb host mode 107
- Audio output 108
- Microphone 108
- Near ultrasound 109
- Virtual reality 110
- Virtual reality mode 110
- Virtual reality mode high performance 110
- File i o access performance 112
- Performance and power 112
- Power saving modes 112
- User experience consistency 112
- Consistent performance 113
- Power consumption accounting 113
- Permissions 114
- Security model compatibility 114
- Filesystem permissions 115
- Uid and process isolation 115
- Alternate execution environments 116
- Multi user support 116
- Premium sms warning 117
- Security features 117
- Privacy 119
- Recording 119
- Usage history 119
- Connectivity 120
- Data storage encryption 120
- Network traffic 120
- Direct boot 121
- File based encryption 121
- Device integrity 122
- Full disk encryption 122
- Keys and credentials 123
- Secure lock screen 124
- Strongbox 127
- Data deletion 128
- Safe boot mode 128
- Automotive vehicle system isolation 129
- Compatibility test suite 129
- Software compatibility testing 129
- Subscription plans 129
- Cts verifier 130
- Updatable software 130
- Changelog viewing tips 131
- Document changelog 131
- Contact us 132
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