Programmatically find whether installing from unknown sources is allowed

Question

I need to find whether the current Android device allows to install apps from sources other than the market. This option appears in the settings UI under Applications named

Answer 1

Here is the code that uses the mentioned setting:

boolean isNonPlayAppAllowed = Settings.Secure.getInt(getContentResolver(), Settings.Secure.INSTALL_NON_MARKET_APPS) == 1;

Also showing the setting to user might me useful:

if (!isNonPlayAppAllowed) {
    startActivity(new Intent(android.provider.Settings.ACTION_SECURITY_SETTINGS));
}

Answer 2

This setting is called "INSTALL_NON_MARKET_APP" (click for documentation).

(I basically already typed the question when I found the answer hidden deep within documentation, with a different name, so I decided to post the question and self answer, since it's not trivial.)

Answer 3

you can request the package manager to tell you

 applicationContext.packageManager.canRequestPackageInstalls()