The connection to ADB is down in Android, Problem and Solution

1. Error:
Build failed
D: \ workspace \ Ganji \ build. xml: 144: the following error occurred while executing this line:
D: \ workspace \ Ganji \ build. xml: 271: Unable to delete file D: \ workspace \ Ganji \ TMP \ proguard \ TMP. Jar
Solution:
A simulator has been enabled and cannot be re-compiled. You must disable one. For ant

2. Error:
The connection to ADB is down, and a severe error has occured.
Who can solve this problem?
Solution:
CMD jump to the SDK tools file path
ADB kill-Server
Then ADB start-Server

3. error:
the connection to ADB is down, and a severe error has occured.
[09:36:56-helloopone] You must restart ADB and eclipse.
[09:36:56-helloopone] Please ensure that ADB is correctly located at 'd: \ ophonesdk_1.5
\ platform-tools \ adb.exe 'and can be executed.
solution:
method 1. ADB kill-server in cmd, and then ADB-startserver
255.2.20.1used to kill adb.exe in the Task Manager (or you may have installed Pods are running. You need to disable all processes of pods and restart eclipse.
method 3. if methods 1 and 2 do not work, check that the last error message contains adb.exe in platform-tools. (my error is that the platform-Tools Folder is not found in the relevant path.
, so I chose to create a new folder and copy all the files in tools to platform-tools.)
4. if the previous method still fails, we recommend that you reinstall a new system. Some Daniel also said: MS has some minor problems [size = large] [/size]