How to launch .apk for installation on Button Click?

Question

How to launch .apk for installation on Button Click ?

               @Override
               public void onClick(View view) {
                Uri uriUrl = Uri.parse(getIntent().getStringExtra("link"));
               Intent launchBr = new Intent(Intent.ACTION_VIEW,uriUrl);
                 startActivity(launchBr);

                   /// i want to launch apk file to install                     
               }