Eclipse the connection to ADB is down, and a severe error has occured Solution

When developing Android applications in eclipse, the console reports an error:

The connection to ADB is down, and a severe error has occured.
You must restart ADB and eclipse.
Please ensure that ADB is correctly located at E: \ Program Files \ Android-SDK-Windows \ platform-tools \ adb.exe 'and can be executed.

The solution is as follows:

1. Close eclipse, run ADB kill-server in cmd, and then ADB start-server. If the execution fails, go to method 2;

2. Kill adb.exe in the task manager and then restart eclipse );

3. If methods 1 and 2 do not work, check that adb.exe exists in platform-tools. if not, create a folder platform-tools, copy all the files in tools to platform-tools.