Apply update upgrade, prompting "Application not installed"

problem description

App detection version, download and install, indicating that "App is not installed"
MIUI9.5,Android 8.0
on the mobile system with problems. At the same time, it is useless in Huawei Glory 9, EMUI 8.0 and Android 8.0, and the installation is successful.

related codes

use the apk download address of CheckVersionLib and dandelion to do app updates.

AllenVersionChecker
                .getInstance()
                .downloadOnly(
                        UIData.create().setDownloadUrl(downloadUrl)
                )
                .excuteMission(context);

https://github.com/AlexLiuShe.

possible reasons

< del > signature is inconsistent. [you can exclude] < / del >
< del > App did not uninstall cleanly [App does not have this problem] < / del >

New Discovery

After confirming the update, the CheckVersionLib library used by

jumps directly to the installation page without downloading. Click install to prompt "App not installed"

Please, what may be the problem?

Installation-problems upgrade android

Mar.16,2021

permission problem? 8.0 App installation must set installation permissions to the App separately, otherwise it cannot be installed

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