I am making one security related application in android so i am looking for three solution
1. my application should be invisible (like service or keylogger) but whole application should not be visible in setting-> application manger
2. All the activity should be visible on some secure key(predefine shortcut) pressed in mobile
3. i want access camera(front camera) without creating sound and image should be saved without preview.
I am making one security related application in android so i am looking for
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No, you cannot do this on Android devices.