Donar

my.xml (carpeta menu)

<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    tools:context="com.elpoeta.essential.spanishfortravellers.MainActivity" >

     <item
        android:id="@+id/set_donate"
        android:title="Donar"
        ></item>
</menu>

MyActity.java

import android.app.AlertDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.net.Uri;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Toast;


public class MyActivity extends ActionBarActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.my, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        switch (item.getItemId())
        {
            case R.id.set_donate:
                AlertDialog.Builder alertDialogDonate = new AlertDialog.Builder(MyActivity.this);
                // Setting Dialog Message
                alertDialogDonate.setTitle("Donar");
                alertDialogDonate.setMessage("Tu donación ayuda a que esta aplicación mejore. \nDesde ya muchas gracias!");
                alertDialogDonate.setCancelable(true);
                alertDialogDonate.setPositiveButton("DONATE", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {

                        Uri.Builder uriBuilder = new Uri.Builder();
                        uriBuilder.scheme("https").authority("www.paypal.com").path("cgi-bin/webscr");
                        uriBuilder.appendQueryParameter("cmd", "_donations");

                        uriBuilder.appendQueryParameter("business", "ramiro.madriaga@gmail.com");
                        uriBuilder.appendQueryParameter("lc", "US");
                        uriBuilder.appendQueryParameter("item_name", "heygringolearnspanish");
                        uriBuilder.appendQueryParameter("no_note", "1");
                        uriBuilder.appendQueryParameter("no_shipping", "1");
                        uriBuilder.appendQueryParameter("currency_code", "USD");
                        Uri payPalUri = uriBuilder.build();

                        Intent viewIntent = new Intent(Intent.ACTION_VIEW, payPalUri);
                        startActivity(viewIntent);
                    }
                });

                alertDialogDonate.show();
                return true;

            //case R.id.action_settings:
                //Toast.makeText(getApplicationContext(), "holaaa", Toast.LENGTH_SHORT).show();
        }
        return true;
    }
}