Hidden activity launcher

Activity

The Activity class is a crucial component of an Android app. An activity provides the window in which the app draws its UI. Most apps contain multiple screens which means they comprise multiple activities. Typically one activity in an app is specified as the main activity which is the first screen to appear when the user launches the app. Those activities are shown in Launcher applications.
Activity Manager provides list of all activities of installed application and ability to run them.
Activities can be divided into 3 groups:
1. Exported activities
Can be launched by anybody.
2. Non-Exported activities
Can be launched inside application or using ROOT. Those activities marked with red color in Activity Manager application.
3. Activities with custom permission
Can be exported or non-exported. A parent activity cannot launch a child activity unless both activities have the same permissions in their manifest. Activity Manager does not support those activities. If you try to run them you will see an error message.
More information you can find in documentation: Introduction to Activities
https://developer.android.com/guide/components/activities/intro-activities

Intent

An Intent is a messaging object you can use to request an action from another app component.
Activity Manager provides Intent builder to compose and send any intents to the system or other applications.
More information you can find in documentation: Intent and intent filters
https://developer.android.com/guide/components/intents-filters

Application Manifest

Every application must have an AndroidManifest xml file. The manifest file describes essential information about an app to the Android build tools the Android operating system and Google Play.
Activity Manager has convenient manifest viewer.
More information you can find in documentation: App Manifest Overview
https://developer.android.com/guide/topics/manifest/manifest-intro

You can support further development by purchasing premium version which has some additional features:

★ ad-free experience
★ ROOT operations (device should be rooted already)
★ shortcuts for intents
★ unlimited intent extra parameters
★ unlimited history of started intents

Run activity run application activity launcher application manager hidden settings hidden applications.