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OTA is the mechanism by which OEMs remotely update the system partition of a device:

• Android 5.0 and later versions use block OTA updates to ensure that each device uses the exact same partition. Instead of comparing individual files and computing binary patches, block OTA handles the entire partition as one file and computes a single binary patch, ensuring the resultant partition contains exactly the intended bits. This allows the device system image to achieve the same state via fastboot or OTA.
• Android 4.4 and earlier versions used file OTA updates, which ensured devices contained similar file contents, permissions, and modes, but allowed metadata such as timestamps and the layout of the underlying storage to vary between devices based on the update method.

File based OTA update in not available beyond AOSP Android 5.0. Sometimes it is require to provide few configuration files along with OTA.

We have solution that provide file based OTA supports along with block-based OTA file. This solut

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"As of now Android doesn’t support 802.1x Authentication over Ethernet natively."

Below components need to be changed/modified

• Ethernet Supplicant
• Ethernet Supplicant interface
• EthernetManager and EthernetService
• IPConfiguration

Proposed solution supports EAP-TLS, EAP-PEAP, EAP-TTLS, EAP-MD5 and EAP-PWD authentication methods.

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reason=1 "Unspecified reason"
reason=2 "Previous authentication no longer valid"
reason=3 "Deauthenticated because sending STA is leaving (or has left) IBSS or ESS"
reason=4 "Disassociated due to inactivity"
reason=5 "Disassociated because AP is unable to handle all currently associated STAs"
reason=6 "Class 2 frame received from nonauthenticated STA"
reason=7 "Class 3 frame received from nonassociated STA"
reason=8 "Disassociated because sending STA is leaving (or has left) BSS"
reason=9 "STA requesting (re)association is not authenticated with responding STA"
reason=10 "Disassociated because the information in the Power Capability element is unacceptable"

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SSH server support in AOSP Android

Download the OpenSSH source code and replace it with existing source code inside external folder.

Add below code in device make file (e.g. device.mk).

PRODUCT_PACKAGES +=
scp
sftp
ssh \

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If you faced libart quick related error in Ubuntu 16.04 then

You can try edit the file ‘art/build/Android.common_build.mk’

ART_HOST_CLANG := false
ifneq ($(WITHOUT_HOST_CLANG),true)
  # By default, host builds use clang for better warnings.
--     ART_HOST_CLANG := true
++     ART_HOST_CLANG := false
endif

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To remove Dex support from APK

Add LOCAL_DEX_PREOPT := false in Android.mk

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/**
* 
* @param bmp input bitmap
* @param contrast 0..10 1 is default
* @param brightness -255..255 0 is default
* @return new bitmap
*/
public static Bitmap changeBitmapContrastBrightness(Bitmap bmp, float contrast, float brightness)
{
    ColorMatrix cm = new ColorMatrix(new float[]

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Code :-

[ X% Y/Z] Building with Jack: /home/minealex2244/los/out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/with-local/classes.dex
FAILED: /bin/bash /home/minealex2244/los/out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/with-local/classes.dex.rsp
Communication error with Jack server (52). Try 'jack-diagnose'
ninja: build stopped: subcommand failed.

It looks like the installation of Jack server is broken. So how do we fix it?

  1. Open a terminal window

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===============================================================================
		For Adding Any Appllication in Android Source
===============================================================================

For : TestApp

Create TestApp directory into below path 
vendor/<vendor>/proprietary/prebuilt/target/product/<device>/system/app/

cd vendor/<vendor>/proprietary/prebuilt/target/product/<device>/system/app/

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AES-128-CBC
AES-128-CFB
AES-128-CFB1
AES-128-CFB8
AES-128-CTR
AES-128-ECB
AES-128-OFB
AES-128-XTS
AES-192-CBC
AES-192-CFB