java - Android - 将图像附加到电子邮件

Question

我正在我的应用程序中开发反馈功能，用户应该从图库中选择一张图像并输入他的消息并按发送，在发送按钮上单击代码应该从框中获取文本(下图)并将其附加到电子邮件 Intent 并发送整个内容，一切似乎都工作正常，直到我收到“无法附加空文件”消息，这就是我在代码中的进展

 String rating = String.valueOf(RateBar.getRating());
            String subject = Feedback.getText().toString();
            String FileLocation = FilePathPreview.getText().toString();
            String to ="EngNor.supp@gmail.com";
            String message = UserInput.getText().toString();
            String body = "Rating : "+rating+" out of 5"+
                    "\n "+message;
            Intent email = new Intent(Intent.ACTION_SEND);
            email.putExtra(Intent.EXTRA_EMAIL, new String[]{to});
            email.putExtra(Intent.EXTRA_SUBJECT, subject);
            email.putExtra(Intent.EXTRA_TEXT, body);
            email.putExtra(Intent.EXTRA_STREAM, Uri.parse("file:/"+FileLocation));

            //need this to prompts email client only
            email.setType("message/rfc822");

            startActivity(Intent.createChooser(email, "Choose an Email client :"));

<小时/>

public void grabImg(){
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(Intent.createChooser(intent,
            "Select Picture"), SELECT_PICTURE);
}
protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
        if(resultCode == RESULT_OK){
            Uri selectedImage = imageReturnedIntent.getData();
            String PathP = selectedImage.getPath().toString();
            FilePathPreview.setText(PathP);
        }
}

Answer 1

创建一个全局 Uri 变量，然后将 uri 保存在 onActivityResult()

Uri uri = null;

protected void onActivityResult(int requestCode, int resultCode, Intent imageReturnedIntent) {
    super.onActivityResult(requestCode, resultCode, imageReturnedIntent);
        if(resultCode == RESULT_OK){
            Uri selectedImage = imageReturnedIntent.getData();
            uri  = selectedImage; // here set the uri 
            String PathP = selectedImage.getPath().toString();
            FilePathPreview.setText(PathP);
        }
}

然后将相同的 uri 变量传递给

        //....
        email.putExtra(Intent.EXTRA_STREAM, uri);
        //....
        //need this to prompts email client only
        email.setType("message/rfc822");

        startActivity(Intent.createChooser(email, "Choose an Email client :"));

更新:如果您仍然无法分享，请添加此标志

email.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)