The application in Android Studio after the release is not installed, how to solve?

Question

Java

After the release, the application is not installed. There are 2 types of errors: 1) The application is installed, but the open button is gray and there is no application icon. 2) The application is not installed. Have you tried everything, what could be causing this error?

Answer 1

try disabling proguard

Answer 2

Look in the manifest to see if these filters are worth it for your start activity.

<intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>

1. The application is successfully installed if you use not release , but debug assembly?
2. You are releasing to . apk or create a Bundle ?
3. If the application is already installed on the device, then when building your new version of the application (apk, bundle), check whether the new build version value is set in the manifest or in the build.gradle file.
in manifest.xml:

package="com.example.application">
...
android:versionCode="НОМЕР_СБОРКИ"
android:versionName="1.0"
...

or in build.gradle:

...
  defaultConfig {
        applicationId "com.example.application"
        minSdkVersion 16
        targetSdkVersion 29
        versionCode НОМЕР_СБОРКИ
        versionName "1.0"
  }
...

Also, if you:
1) sign the application with a key,
2) install the application over the old version
, you need to make sure that you signed the application with the same key as the previously installed version of the application. Otherwise, there is not enough information to give you any other possible solution.