call

 Button  Maps=(Button)findViewById(R.id.btnMap);
        Maps.setOnClickListener(new View.OnClickListener() {
                public void onClick(View arg0) {
                    Intent intent = new Intent(android.content.Intent.ACTION_VIEW,      Uri.parse("https://maps.google.com/maps?saddr="+lati0+","+longi0+"&daddr="+lati+","+longi));
                    startActivity(intent);

        }});

        Button  Call=(Button)findViewById(R.id.btnCall);
        Call.setOnClickListener(new View.OnClickListener() {
                public void onClick(View arg0) {
                    String toDial="tel:"+telp;
                    startActivity(new Intent(Intent.ACTION_DIAL,Uri.parse(toDial)));


        }});


        Button  Sms=(Button)findViewById(R.id.btnSms);
        Sms.setOnClickListener(new View.OnClickListener() {
                public void onClick(View arg0) {
                    Intent  i= new Intent(detail.this, Sms.class);
                    startActivity(i);

        }});


        Button  Web=(Button)findViewById(R.id.btnWeb);
        Web.setOnClickListener(new View.OnClickListener() {
                public void onClick(View arg0) {
                    Intent intent = new Intent(android.content.Intent.ACTION_VIEW,      Uri.parse(url));
                    startActivity(intent);
        }});


        Button  Youtube=(Button)findViewById(R.id.btnYoutube);
        Youtube.setOnClickListener(new View.OnClickListener() {
                public void onClick(View arg0) {
                    Intent  i= new Intent(detail.this, Youtube.class);
                    startActivity(i);

        }});