Question

我的布局很好，只留下了几个问题：我无法使用mailto和facebook链接按钮。这就是我尝试过的：

ImageView Button = (ImageView)findViewById(R.id.yourButtonsId);

Button.setOnClickListener(new OnClickListener() {
    public void onClick(View v) {
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_VIEW);
        intent.addCategory(Intent.CATEGORY_BROWSABLE);
        intent.setData(Uri.parse("http://www.yourURL.com"));
        startActivity(intent);
    }
});

和

TextView textView = (TextView)findViewById(R.id.yourID);

textView.setOnClickListener(new OnClickListener() {
    public void onClick(View v) {
        Intent intent = new Intent();
        intent.setAction(Intent.ACTION_VIEW);
        intent.addCategory(Intent.CATEGORY_BROWSABLE);
        intent.setData(Uri.parse("http://www.typeyourURL.com"));
        startActivity(intent);
    } });

Answer 1

Intent emailIntent = new Intent(Intent.ACTION_SENDTO, Uri.fromParts(
        "mailto","abc@gmail.com", null));
emailIntent.putExtra(Intent.EXTRA_SUBJECT, "Subject");
emailIntent.putExtra(Intent.EXTRA_TEXT, "Body");
startActivity(Intent.createChooser(emailIntent, "Send email..."));

Answer 2

如果你想使用mailto而不是在你的xml中放一个EditText和一个邮件按钮。用户将在edittext中添加他的电子邮件ID，然后按按钮发送邮件。单击发送按钮时，您可以像

一样编写

<?php

// ...

use Doctrine\DBAL\Exception\ConstraintViolationException;
use Symfony\Component\Form\FormError;
use Symfony\Component\Form\Extension\Validator\ViolationMapper\ViolationMapper;

// ...

public function indexAction(Request $request)
{
    $task = new Task();

    $form = $this->createFormBuilder($task)
        ->add('name', TextType::class)
        ->add('save', SubmitType::class, array('label' => 'Create Task'))
        ->getForm();

    $form->handleRequest($request);

    if ($form->isSubmitted() && $form->isValid()) {
        $task = $form->getData();
        $em = $this->getDoctrine()->getManager();
        $em->persist($task);

        try {
            $em->flush();

            // Everything went well, do whatever you're supposed to.
            return $this->redirectToRoute('task_success');
        } catch (ConstraintViolationException $e) {
            // Reopen the entity manager so the validator can do jobs
            // that needs to be performed with the database (in example:
            // unique constraint checks)
            $em = $em->create($em->getConnection(), $em->getConfiguration());

            // Revalidate the form to see if the validator knows what
            // has thrown this constraint violation exception.
           $violations = $this->get('validator')->validate($form);

            if (empty($violations)) {
                // The validator didn't see anything wrong...
                // It can happens if you have a constraint on your table,
                // but didn't add a similar validation constraint.

                // Add an error at the root of the form.
                $form->add(new FormError('Unexpected error, please retry.'));
            } else {
                // Add errors to the form with the ViolationMapper.
                // The ViolationMapper will links error with its
                // corresponding field on the form.
                // So errors are not displayed at the root of the form,
                // just like if the form was validated natively.
                $violationMapper = new ViolationMapper();

                foreach ($violations as $violation) {
                    $violationMapper->mapViolation($violation, $form);
                }
            }
        }
    }

    return $this->render('default/new.html.twig', array(
        'form' => $form->createView(),
    ));
}

Android上的按钮问题

2 个答案: