[GUIDE] Set up Android SDK (ADB) for Windows 8 / 8.1 / [ADB][Bootloader][Fastboot] - AT&T HTC One (M8)

Android SDK - Powerful tool and easy to set up for use with your HTC One M8
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The Reason that you would want to use Android SDK is because its very easy, it's well updated and it just WORKS! There is much more use with HTC devices with adb then with Samsung when it comes to the daily things like splash screens, radio updates, firmware. You will be dealing a lot with the bootloader and fastboot flashing. So to help out, I will post a helpful guide to help you get started for use with the HTC One M8.​
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USB 3.0 Information if Needed
USB 3.0 Windows 8 Solution Link 1
USB 3.0 Windows 8 Solution Lin 2 - Found in above thread
Part 1. Follow These Steps Below - (Preparation)
1. Download Android SDK For Windows
2. Click the
either the 32bit version or 64bit version
3. Create a folder in the C: and name it Android. See below
4. Place adt-bundle-windows in the Android Folder you just created. Use WinZip, WinRAR or 7-Zip to extract the contents inside the folder. See Below
5. Once extracted, Double click SDK Manager and instal all 4.4.2 and 4.3 items and under tools (SDK Tools and Platform Tools). See Picture Below
6. After all packages are installed and updated, download the latest HTC Sync Manager and install once download completes
7. Once Sync Manager completes installation process, go to control panel and uninstall HTC Sync Manager only, you will see HTC Driver in there as well (LEAVE IT THERE)
8. Important, make sure you enable developer options and turn on USB Debugging. Instructions Below if you are unsure how to do that
1. Go to Settings > About > Software information > More > Tap Build Number 5x
2. Once you get notification saying Developer options is unlocked go back to > settings
3. Click Developer options
4. Add check in the box USB Debugging
9. Plug phone into the computer and let it install all the drivers, you should see pop ups.
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The Computer and Phone are now prepped for you to start the whole ADB Process
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Part 2. Verifying ADB is set up properly and Working
1. Open Command Prompt and Change directories to your platform-tools folder. This is where all the adb files are located. See Below
In Command Prompt Type - Refer to Part 3 so you no longer need to Change Directory
Code:
cd c:\Android\sdk\platform-tools
2. In Command prompt type
Code:
adb devices
3. If your output shows your device attached like below, then you are good to go!!!
YOU ARE FINISHED!!! Below is a command to get into the bootloader if interested!! Good Luck
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Part 3. Environment Variables - No need to Change Directory in Command Prompt Anymore (This is if you want to - Not Required)
1. Press Win+R, then type sysdm.cpl
2. Click Advanced Tab
3. Click Environment Variables Button
4. Under System Variables, find Path, click to highlight it and then hit the edit button
5. Go to the end of the Variable Value and add the following exactly as you see it in the code box below
Code:
;C:\Android\sdk\platform-tools
6. Click OK to accept the changes you just added
7. Open Command Prompt again to verify by pressing Win+R and type cmd and hit enter
8. Once Command Prompt is open -> Simply type adb devices with your device connected with USB Debugging already enabled
9. If you did everything correctly, there is no need to change paths anymore
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Getting into the Bootloader
In Command Prompt Type:
Code:
adb reboot bootloader
Thanks To:
Ashraf - Images used for Environment Variables - Not all were his since the guide was modified

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reserved if needed

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Or you can install just adb and fastboot from http://forum.xda-developers.com/showthread.php?p=48915118
Sent from my HTC One_M8 using Tapatalk

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OP Updated
Updated OP
1. Added Environment Variables to no longer have to Change Directory
2. Cleaned up OP
3. Added Thanks

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Rojax said:
Or you can install just adb and fastboot from http://forum.xda-developers.com/showthread.php?p=48915118
Sent from my HTC One_M8 using Tapatalk
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Thanks for pointing that out but it is kind of unnecessary to do after I put all this together, it took time.
This is easy as that period and it's constantly updated, all you have to do is run sdk manager and run updates, nothing else required once set up. This is streamlined for just our devices since it also has directions for drivers for our device. Otherwise I would have put it under Android and general...
The tool you suggest by the way is awesome. Appreciate you taking the time to share it, FYI it's updated via sdk, the op stated where he pulls the updates for adb from.
So tomatoe, tomato, please let the users decide which tool they would like to use.
Thanks
Sent from my HTC6525LVW using Tapatalk

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The guide is great, I was just listing an alternative (much smaller) download. Thanks for sharing this to help our community grow
Sent from my HTC One_M8 using Tapatalk

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Rojax said:
The guide is great, I was just listing an alternative (much smaller) download. Thanks for sharing this to help our community grow
Sent from my HTC One_M8 using Tapatalk
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No problem and thanks for sharing. Appreciate it
Sent from my HTC6525LVW using Tapatalk