在 Android 中使用 Java 发送电子邮件无法获得确认？

Question

我是 android 的新手。我已经编写了这段代码，它工作正常并且也可以发送电子邮件，但是当我按下提交按钮时，它会在选择“ 时打开“选择电子邮件客户端” GMAIL”它会打开 gmail 帐户并发送它并显示 toast 消息“发送消息”和电子邮件成功发送到目标地址，我仍然在“电子邮件屏幕”上是否有任何方法可以检查电子邮件是否已到达目标地址成功返回“true”，否则返回“false”，以便基于该布尔值我可以在所有编辑框上设置空值或刷新所有文本框。

    ImageView submitBtn = (ImageView)findViewById(R.id.askscreen_submit_btn);
            submitBtn.setOnClickListener(new View.OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                try {
    // CALL GetText method to make post method call
                        //GetText();
                SendEmailToAalim(email.getText().toString(),name.getText().toString(),address.getText().toString(),subject.getText().toString());
                } catch (Exception ex) {
                        content.setText(" url exeption! ");
                    }   
                }
            });
        }
        public void SendEmailToAalim(String email,String name,String address,String subject)
        {
            if(email == null || email.length()==0)
            {
            Toast.makeText(context,"Please Enter Email Id",Toast.LENGTH_LONG).show();
            }
            else if(email.length()>0 && email!= null && !checkEmailValidity(email))
            {
                Toast.makeText(context,"Please Enter Correct Email Id",Toast.LENGTH_LONG).show();

            }
            else if(subject == null || subject.length() == 0)
            {
                Toast.makeText(context,"Please Enter Value in Subject",Toast.LENGTH_LONG).show();   
            }
            else if(name == null || name.length() ==0)
            {
                Toast.makeText(context,"Please Enter Value in Name Field",Toast.LENGTH_LONG).show();    
            }
            else if(address == null || address.length() ==0)
            {
                Toast.makeText(context,"Please Enter Value in Address Field",Toast.LENGTH_LONG).show();
            }
            else if(email.length()!= 0 &&  checkEmailValidity(email) == true &&subject.length()!=0 && address.length()!=0 && name.length()!=0)
            {
                Intent emailSendIntent = new Intent(Intent.ACTION_SEND); 
                emailSendIntent.putExtra(Intent.EXTRA_EMAIL,new String[]{"abc32@yahoo.com"}); 
    emailSendIntent.putExtra(Intent.EXTRA_SUBJECT, subject); 
   emailSendIntent.setType("message/rfc822");
    //emailSendIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); // this will make such that when user returns to your app, your app is displayed, instead of the email app.
    startActivity(Intent.createChooser(emailSendIntent,"Choose an Email client :"));    
  }
  }
 public static boolean checkEmailValidity(CharSequence email)
 {
  return android.util.Patterns.EMAIL_ADDRESS.matcher(email).matches(); 
 }

这是电子邮件屏幕的屏幕截图。有人可以指出我需要做什么来提醒用户电子邮件已发送并刷新页面。

Answer 1

try to use these ::->


final Intent intent = new Intent(
                            android.content.Intent.ACTION_SEND);
                    intent.setType("*/*");
                    intent.putExtra(android.content.Intent.EXTRA_SUBJECT,
                            "");
                    intent.putExtra(android.content.Intent.EXTRA_STREAM,
                            Uri.fromFile(new File("file name")));
                    final PackageManager pm = getPackageManager();
                    final List<ResolveInfo> matches = pm.queryIntentActivities(
                            intent, 0);
                    ResolveInfo best = null;
                    for (final ResolveInfo info : matches)
                        if (info.activityInfo.packageName.endsWith(".gm")
                                || info.activityInfo.name.toLowerCase()
                                        .contains("gmail"))
                            best = info;
                    if (best != null)
                        intent.setClassName(best.activityInfo.packageName,
                                best.activityInfo.name);
                    startActivity(intent);