Android sdk, Check if TWO files exist on sdcard

So i have been looking a bit on the web and i found nothing really; I need a simple piece of code that will let me check if two files exist, If one of them does not, make a toast message error. Heres what i have tried (I thought it would work, lol)

if((file1 && file2.exists())){
    ... 
    }else{
        Toast.makeText(MainActivity.this, "Some files are missing :(", Toast.LENGTH_LONG).show();
}