android tutorial

It is common for an Android Developer to upload new versions of an existing app in the Play-Console. If you do not follow versioning properly, you may get errors like "You can’t rollout this release because it doesn’t allow any existing users to upgrade to the newly added APKs". Let us know how to solve this.

How to Solve Play Console Error You can't Rollout This Release

This Rollout error occurs mainly due to two main reasons. Let us know the scenarios and solve this error next.

Each Android Activity has a toolbar or Action Bar. On the Home screen, we may not see or need a Back-Button. But, on inner activities or screens, we need to show Back-Button arrow or Up button at the top-left position. Let us know how to show the Android toolbar back button, change Color and Shape in the Android studio programmatically. We try to click it and go back to the parent activity. Eventually, we solve the problem of the Not-Showing or Not-working Android Toolbar.

Every Android Activity has a Toolbar or Action-Bar supplied by default by the parent theme "Theme.AppCompat.Light.DarkActionBar". You can find it inside the "styles.xml" file. This theme or style is applied for every Android project created using the available templates. Let us solve this Android exception problem "java.lang.IllegalStateException: This Activity already has an action bar supplied by the window decor.