我在Android的一个新手。请帮我。我不能发送电子邮件给多个收件人。 这是我的code。

 公共类SendEmailActivity延伸活动{

的EditText subject_ed，message_ed;
TextView的subject_tv，message_tv;
按钮send_btn;

 ArrayList的＆LT;字符串＆GT;的emailList;
 ArrayList的＆LT;整数GT; IDLIST;
 INT事件ID;
@覆盖
保护无效的onCreate（包savedInstanceState）{
    // TODO自动生成方法存根
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.contacts_email_sms_layout）;
    setupViews（）;
    意向意图= getIntent（）;
    叠B = intent.getExtras（）;
    事件ID = b.getInt（事件ID）; //事件ID
    IDLIST = b.getIntegerArrayList（IDLIST）; // ID列表
    的emailList = b.getStringArrayList（的emailList）; //电子邮件ID列表
    buttonListeners（）;
}

公共无效setupViews（）
{
    subject_ed =（EditText上）findViewById（R.id.ed_subject_email）;
    message_ed =（EditText上）findViewById（R.id.ed_msg_body）;
    subject_tv =（TextView中）findViewById（R.id.tv_subject_email）;
    message_tv =（TextView中）findViewById（R.id.tv_msg_body）;
    send_btn =（按钮）findViewById（R.id.btn_send_sms_email）;
}

公共无效buttonListeners（）
{
    send_btn.setOnClickListener（新OnClickListener（）{

        @覆盖
        公共无效的onClick（视图v）{
            // TODO自动生成方法存根
            Toast.makeText（getApplicationContext（），通过电子邮件发送，Toast.LENGTH_LONG）.show（）;
            //字符串= textTo.getText（）的toString（）;
              字符串主题= subject_ed.getText（）的toString（）。
              字符串消息= message_ed.getText（）的toString（）。
            [对象]为= emailList.toArray（）;
//的for（int i = 0; I＆LT; = emailList.size（）;我++）
//// {
////
//字符串= emailList.get（0）;
////
////}



              意图电子邮件=新的意图（Intent.ACTION_SEND）;
              的for（int i = 0; I＆LT; to.length;我++）
                {
                    Log.i（字符串，（串）[I]）;
                    //的String []海峡=（字符串[]）在[I];
                     email.putExtra（Intent.EXTRA_EMAIL，+（串）[我] +'）;
                }

              email.putExtra（Intent.EXTRA_SUBJECT，学科）;
              email.putExtra（Intent.EXTRA_TEXT，消息）;

              //需要这样的提示只是电子邮件客户端
              email.setType（信息/ RFC822）;

              startActivity（Intent.createChooser（电子邮件，选择电子邮件客户端））;
             // 完（）;
        }
    }）;
}

}
 

解决方案

首先，你需要做如下从你的列表转换为字符串[]是错误的。

 名单，其中，字符串＆GT;名单=新的ArrayList＆LT;字符串＆GT;（）;
的String [] arrayOfStrings = list.toArray（新的String [则为list.size（））;
 

和接下来的事情就是，你需要一提的android.Content.Intent，如下：

所以，最后你需要改变如下：

 的ArrayList＆LT;字符串＆GT;的emailList;
的emailList = b.getStringArrayList（的emailList）;
的String [] emailArray;
意图电子邮件=新的意图（android.content.Intent.ACTION_SEND）;
的for（int i = 0; I＆LT; to.length;我++）{
Log.i（字符串，（串）[I]）;
email.putExtra（android.content.Intent.EXTRA_EMAIL，emailList.toArray（新的String [emailList.size（）））;
}
email.putExtra（android.content.Intent.EXTRA_SUBJECT，学科）;
email.putExtra（android.content.Intent.EXTRA_TEXT，消息）;

email.setType（信息/ RFC822）;或email.setType（text / plain的）;

startActivity（Intent.createChooser（电子邮件，选择电子邮件客户端））;
 

I'm a newbie in android. Please help me. I'm not able to send email to multiple recipients. Here is my code.

public class SendEmailActivity extends Activity{

EditText subject_ed,message_ed;
TextView subject_tv,message_tv;
Button send_btn;

 ArrayList<String> emailList;
 ArrayList<Integer> idList;
 int eventId;
@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.contacts_email_sms_layout);
    setupViews();
    Intent intent = getIntent();
    Bundle b = intent.getExtras();
    eventId =  b.getInt("EventId");//event id
    idList = b.getIntegerArrayList("IdList");//list of Ids
    emailList = b.getStringArrayList("EmailList");//list of email ids
    buttonListeners();
}

public void setupViews()
{
    subject_ed = (EditText)findViewById(R.id.ed_subject_email);
    message_ed = (EditText)findViewById(R.id.ed_msg_body);
    subject_tv = (TextView)findViewById(R.id.tv_subject_email);
    message_tv = (TextView)findViewById(R.id.tv_msg_body);
    send_btn = (Button)findViewById(R.id.btn_send_sms_email);
}               

public void buttonListeners()
{
    send_btn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            Toast.makeText(getApplicationContext(), "Email sent",Toast.LENGTH_LONG).show();
            // String to = textTo.getText().toString();
              String subject = subject_ed.getText().toString();
              String message = message_ed.getText().toString();
            Object[] to =  emailList.toArray();
//            for(int i = 0; i<=emailList.size(); i++)
////                  {
////                      
//                  String  to=   emailList.get(0);
////                     
////                  }



              Intent email = new Intent(Intent.ACTION_SEND);
              for(int i = 0; i < to.length; i++)
                {
                    Log.i("String is", (String)to[i]);
                    //String[] str = (String[])to[i];
                     email.putExtra(Intent.EXTRA_EMAIL,",'" +(String)to[i] + "'");
                }

              email.putExtra(Intent.EXTRA_SUBJECT, subject);
              email.putExtra(Intent.EXTRA_TEXT, message);

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

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

}

First your conversion from List to String[] is wrong you need to do as follows..

List<String> list = new ArrayList<String>();
String[] arrayOfStrings = list.toArray(new String[list.size()]);

And next thing is you need to mention android.Content.Intent as follows..

So finally you need to change as follows

ArrayList<String> emailList;
emailList = b.getStringArrayList("EmailList");
String[] emailArray;
Intent email = new Intent(android.content.Intent.ACTION_SEND);
for(int i = 0; i < to.length; i++){
Log.i("String is", (String)to[i]);
email.putExtra(android.content.Intent.EXTRA_EMAIL,emailList.toArray(new String[emailList.size()]));
}
email.putExtra(android.content.Intent.EXTRA_SUBJECT, subject);
email.putExtra(android.content.Intent.EXTRA_TEXT, message);

email.setType("message/rfc822"); or email.setType("text/plain");

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