I try to find way how to start default gallery on android (I will not to start intent ACTION_VIEW to view specific file )..... I would like to start gallery as by clicking by my finger on icon on screen ?
In order to start a specific app you need to know its package name. You can then use PackageManager.GetApplicationIntent to get the intent that will start the app.
The problem is that different devices can be installed with different galleries.
The photos app package name is: com.google.android.apps.photos
Tip: if you are connected in usb debug mode you can uncheck the filter option in the logs pane and then click on the gallery app. The intent that starts it will be printed in the logs.