April 25, 2019

Android L Developer Preview- How To Install Android L on your smartphone? Step by Step tutorial on installing Android L Developer Preview

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Everyone is exited about the new Android L- the next version of Android. Google hasn’t already released it yet but still you can install the preview version of Android L on the supported smartphone. This Preview version of android L is only supported on Nexus 5″hammerhead” and Nexus 7 “razor” Wi-Fi (version 2, released in 2013). So, if you have these smartphones then you can try the new Android L Preview before it has been released by following the instruction below.

Android L Developer Preview how to install android L [AdSense-A]

Things to Remember

This is the developer preview and all the function may or may not be included on the final release of the software. There may be bug on the software, it is not a stable release and may contain errors and defects that can result in damage of your smartphone. So, if you are ready to take the risk or you have the above mentioned smartphones lying around in your house that is not your primary device and want to enjoy the new Android L, then go ahead and install it. Also make a backup of your data and ROM before you start this installation process of Android L developer preview package.

Things to do before you start the Installation Process

First of all you have to download the Android SDK manager and unpack the downloaded folder to your desktop or any other folder that you will be able to find it later. Now go-ahead and Enable USB Debugging on your Smartphone. You also need Google USB Driver in order to perform adb debugging with any of the Google Nexus devices. Now the most important thing, you have to Download and unpack the Android Developer Preview package for your Nexus device. You can use any unpacking software to do so. Winzip, Winrar, 7zip are some of the recommended softwares.

Install the Google USB driver that you downloaded earlier on your computer. You can do it by opening the Device Manager. Right-click on “Computer” from your desktop or Window Explorer and select Manage. Select Device in the left pane. Locate and expand Other devices in the right pane. Now Right-click on your device name (such as Nexus 5) and select Update Driver Software. This will launch the Hardware Update Wizard. Select Browse my computer for driver software and click Next. Click Browse and locate the USB driver folder that you downloaded earlier. Click Next to install the driver.

Now connect your device to the computer. Make sure that you connected your smartpone in PTP mode but not in MTP mode. If you are asked to Allow USB Debugging? gohead and click on Always allow from this computer and click on OK.

usb debugging

Install (Flash) the Android  L preview on your Nexus devices


Open the Android SDK Manager that you downloaded earlier and Navigate to Sdk->Platform-tool. Now you have to open Command Line on this folder. You can either open Command Line and navigate to this folder by typing cd and typing the path of the folder or simply by pressing Shift and Right clicking on this folder and clicking on Open Command Window here. Now type the following command in the Command Line to see if your device is correctly connected to the computer or not.

[sourcecode language=”plain”]
adb devices

adb devicesIf you device is connected properly it will be shown in the List of devices attached. If your devices is not listed check if you have missed something.

Now you have to start the device in flashboot mode. You can either do it by typing

[sourcecode language=”plain”]
adb reboot bootloader

Or you could turn the device off and turn it on by relevant key combination, on Nexus 5 you have to hold Volume up + Volume down + Power button as the device begins booting up.

Now unlock the device’s bootloader by running

[sourcecode language=”plain”]
fastboot oem unlock

Becareful, it will erase all the data on your device. You will be asked to conform unlocking the boot-loader, go ahead and give the conformation. Now navigate to the unzipped system image directory of the Android Developer Preview package on the terminal. Just type cd and the path of the Android Developer Preview package. Now Execute the flash-all script. This script installs the necessary bootloader, baseband firmware(s), and operating system. It will take sometime, be patience.
It is better to unlock the bootloader once the installation is finished for security. After the installation is finished again start the device in fastboot mode again and type


[sourcecode language=”plain”]
fastboot oem lock

Once it is done, reboot your device and enjoy the Android L- the next generation android on your Nexus. If you ran into any problem you can try reinstalling the software and see how it works for you.

Revert back to the Original ROM

If you want to uninstall the L Preview and revert the device to factory specifications, download the Factory image you want to flash to for your device. Follow the above instructions to flash the original image to your device.

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About Bhattarai Diwas (thenepaltech) 213 Articles
I'm an Engineer and have Bachelor's Degree in Electrical and information technology. Right now I am working as a software developer in Germany. All in all I love programming and I am a tech geek.