Tamper checks

Installer

import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageInfo;

 
 public class InstallerCheck{
 
 private static final String PLAY_STORE_APP_ID = "com.google.android";

    public static boolean verifyInstaller(final Context context) {
        final String installer = context.getPackageManager()
                .getInstallerPackageName(context.getPackageName());
        return installer != null
                && installer.startsWith(PLAY_STORE_APP_ID);
    }
}