CordovaError: Failed to execute shell command "getprop,dev.bootcomplete

When I run the command ionic cordova run android. I’m getting the following error

audio: Failed to create voice `adc'
(node:5976) UnhandledPromiseRejectionWarning: CordovaError: Failed to execute shell command "getprop,dev.bootcomplete"" on device: Error: C:\Users\hi\AppData\Local\Android\Sdk\platform-tools\adb.exe: Command failed with exit code 1 Error output:
error: device still authorizing
    at D:\product\project-1\frontend\platforms\android\cordova\lib\Adb.js:88:25
    at _rejected (D:\product\project-1\frontend\platforms\android\cordova\node_modules\q\q.js:864:24)
    at D:\product\project-1\frontend\platforms\android\cordova\node_modules\q\q.js:890:30
    at Promise.when (D:\product\project-1\frontend\platforms\android\cordova\node_modules\q\q.js:1142:31)
    at Promise.promise.promiseDispatch (D:\product\project-1\frontend\platforms\android\cordova\node_modules\q\q.js:808:41)
    at D:\product\project-1\frontend\platforms\android\cordova\node_modules\q\q.js:624:44
    at runSingle (D:\product\project-1\frontend\platforms\android\cordova\node_modules\q\q.js:137:13)
    at flush (D:\product\project-1\frontend\platforms\android\cordova\node_modules\q\q.js:125:13)
    at _combinedTickCallback (internal/process/next_tick.js:131:7)
    at process._tickCallback (internal/process/next_tick.js:180:9)
(node:5976) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:5976) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

But the emulator is starting & my app is not avalible in the device. What is the problem & how can I solve it? Can someone help me?

Same issue here. Android emulator (after several hours of little repairs) finally launch, but app doesn’t.

emulator: Requested console port 5584: Inferring adb port 5585.
HAX is working and emulator runs in fast virt mode.
(node:1764) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): CordovaError: Failed to execute shell command "getprop,dev.bootcomplete"" on device: Error: D:\Android\sdk\platform-tools\adb.exe: Command failed with exit code 1 Error output:
error: device still connecting
(node:1764) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

This worked for me. Hope it!ll help you: https://stackoverflow.com/questions/50935337/failed-to-execute-shell-command-getprop-dev-bootcomplete-on-device-error-for/51005353

I have tried it no use app is not available in the emulator.