Background

Use ionic+cordova+gradle to package the Android program. The environment is as follows:

    cordova  :  7.1.0
    Gradle  :   7.4
    @ionic/cli-utils  : 1.19.0
    ionic (Ionic CLI) : 3.19.0
    

System:

    Node : v6.9.1
    npm  : 3.10.8
    OS   : Windows 10

Misc:

    backend : pro

problem

* What went wrong:
Execution failed for task ':packageDebug'.
> com.android.ide.common.signing.KeytoolException: Failed to read key AndroidDebugKey from store "C:\Users\11644\.android\debug.keystore": Invalid keystore format

Solution:

According to the second paragraph

 Failed to read key AndroidDebugKey from store "C:\Users\11644\.android\debug.keystore": Invalid keystore format

Find the debug.keystore file

delete this file and rerun the command
package successfully

BUILD SUCCESSFUL

Total time: 1.658 secs
Built the following apk(s):
        D:/ProjectFiles/CordovaProject/myapp/platforms/android/build/outputs/apk/android-debug.apk
ANDROID_HOME=D:\Programmer\AndroidSDKmange
JAVA_HOME=C:\Program Files\Java\jdk1.8.0_201
No target specified, deploying to device '26395863'.
Skipping build...
Built the following apk(s):
        D:/ProjectFiles/CordovaProject/myapp/platforms/android/build/outputs/apk/android-debug.apk
Using apk: D:/ProjectFiles/CordovaProject/myapp/platforms/android/build/outputs/apk/android-debug.apk
Package name: io.cordova.hellocordova
LAUNCH SUCCESS