I encountered this problem today when starting adb while developing Android. Because I updated the latest adt, ADB server didn't ACK, failed to start daemon, and then you want to start daemon. Please ensure that adb is correctly located at 'E:\android-sdk-windows\platform-tools\' and can be executed. "
Step 1: Check the task manager to see if all programs are closed. If not closed, all will be closed. Then add android-sdk-windows\platform-tools and android-sdk-windows\tools to the environment variables to test whether it can be started. If not, run the command line:
adb kill-server
adb start-server
This may occur at this time
E:\android-sdk-windows\platform-tools>adb kill-server
E:\android-sdk-windows\platform-tools>adb start-server
* daemon not running. starting it now on port 5037 *
ADB server didn't ACK
* failed to start daemon *
If it still doesn't work, the only option is to select the first option in the Android Manager in eclipse, that is, avd Manager. The virtual device can be found in the virtual device. Start it. After it starts, turn off your eclipse and then restart it. I wish you success! ! !