button2 = (Button) findViewById(R.id.button2);
    button2.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            //code
            Uri uri = Uri.parse("stream link" + token generator);
            Intent intent = new Intent("android.intent.action.VIEW", uri);
            intent.setDataAndType(uri, "video/*");
            intent.putExtra("secure_uri", true);
            intent.putExtra("title", "Junior TV");
            try {
                intent.setPackage("com.mxtech.videoplayer.ad");
                intent.setClassName("com.mxtech.videoplayer.ad", "com.mxtech.videoplayer.ad.ActivityScreen");
                MainActivity.this.startActivityForResult(intent, 0);
            } catch (ActivityNotFoundException e) {
                Log.e("Mx Player", "Is Not Installed");
                MainActivity.this.startActivity(intent);
            }
        }
    });