[Android] The connection to ADB are down, and a severe error has occured.

At the time of Android development, sometimes when we turn on the virtual machine to run the program, we report something similar to the following error:

[2015-07-19 15:08:29-testxiaoyanlibrary] The connection to ADB are down, and a severe error has occured.
[2015-07-19 15:08:29-testxiaoyanlibrary] You must restart ADB and Eclipse.
[2015-07-19 15:08:29-testxiaoyanlibrary] Please ensure that ADB was correctly located at ' G:\eclipse\adt-bundle-windows-x86_64-20140702\sdk\platform-tools\ Adb.exe ' and can be executed.

To Baidu a bit, may be the following situation:

A: The simulator is unstable and sometimes requires a re-deployment of the environment, sometimes with the need to re-establish the simulator and create a new AVD.

B: The default port may be occupied, type netstat in cmd, turn off conflicting port programs, or set a new port.

C: Add the Platform-tools directory and the tools directory to the PATH environment variable.

D: Turn eclipse into DDMS mode and restart ADB and Eclipse.

Solution:

(1) The general situation does not need too much trouble, directly switch to the DDMS page, select Reset adb.

(2) If the first step, or not, do the following: (Operation in Win7)

Start Task Manager--Process page--Find and select the Adb.exe process--end the process--and take the first step

(3) If you find that the status of the virtual machine is not online, turn it off, restart the open, then.

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[Android] The connection to ADB are down, and a severe error has occured.