Error initializing ADB: Unable to create Debug Bridge: Unable to start ADB server

There are a couple of solutions depending on what exactly is causing the problem.

So, just follow the following steps.

Step 1:- Close Android-Studio.
Step 2:- Open Command prompt or win + r, type cmd and press Enter.
Step 3:- Navigate to your platform-tools, in most of the cases the location is:

C:\Users\[user]\AppData\Local\Android\android-sdk\platform-tools

but in your case, the location is:

C:\Android\Sdk\

For Mac users the path is

/Users/[user]/Library/Android/sdk/platform-tools

Step 4:- Type adb.exe start-server, Press Enter
Step 5:- Open Android Studio again.

For Mac the command is just adb start-server

The problem should be solved!

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If the problem persists, then follow these steps-

Step 1:- Close Android Studio.
Step 2:- Press Alt + Ctrl + Del, then choose Start Task Manager.

Windows Task Manager opens.

Step 3:- Go to the processes tab.
Step 4:- Look for adb.exe and select that.
Step 5:- Press End Process.
Step 6:- Open Android Studio again.

That's it. Now your problem must be solved!

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But if the problem is still there (which I don't think will happen), then there is something wrong (or might be missing) in your platform-tools.

To fix that, delete platform-tools from your computer, then download them again from Official Android Developer website.

Extract the downloaded file.

Now place the extracted file, where platform-tools were located before deleting.

Default Location of platform-tools is

C:\Users\[user]\AppData\Local\Android\android-sdk\

But in your case, the location is

C:\Android\Sdk\

I spent around a complete day to look for the solution but couldn't find the exact one.

Finally what I did was that I uninstalled my antivirus and after that it worked like a charm.

So, here I shortlist the steps to check whether you are solving for the correct problem or not:-

1. Run command prompt and set path to where adb.exe file is present. (In most of the cases it's found at C:\Users\YOUR_USERNAME\AppData\Local\Android\Sdk\platform-tools)
2. Type adb start-server and press enter.
3. If there is an error displayed saying something like "Cannot connect to daemon" , then you must look in your antivirus for firewall settings and add the path to its exceptions or you can simply uninstall your antivirus.

Steps to follow for Immediate recovery.

No need to close Android Studio.

1. Goto Task Manager By Clicking (Ctrl + Shift + Esc).
2. Open Processes Tab.
3. Click Image Name in the Processes Tab for Ascending Order(A-Z).
4. Now choose adb.exe (or) adb.exe*32 (or) adb.exe*64.
5. Now Click End Process Button at Right End Bottom corner.
6. That's All , Now your adb will auto re-started When Launching Application.