我正在向朋友发送邮件，但以下代码仅发布一次。之后，我就不能再发邮件了。请指导我。
package com.mkyong.android;
import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;
public class SendEmailActivity extends Activity {
Button buttonSend;
ConnectionDetector cd;
Boolean isInternetPresent = false;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
buttonSend = (Button) findViewById(R.id.buttonSend);
buttonSend.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
cd = new ConnectionDetector(getApplicationContext());
isInternetPresent = cd.isConnectingToInternet();
if (isInternetPresent) {
new MyTask().execute();
} else {
Toast.makeText(getApplicationContext(), "Not Enabled",
Toast.LENGTH_LONG).show();
}
}
});
}
class MyTask extends AsyncTask<String, String, String> {
@Override
protected String doInBackground(String... params) {
Intent i = new Intent(Intent.ACTION_SEND);
i.putExtra(android.content.Intent.EXTRA_EMAIL,
new String[] { "Xnn123@gmail.com" });
i.putExtra(android.content.Intent.EXTRA_SUBJECT, "subject of email");
i.putExtra(android.content.Intent.EXTRA_TEXT, "body of email");
i.setType("message/rfc822");
try {
startActivity(Intent.createChooser(i, "Send mail..."));
} catch (android.content.ActivityNotFoundException ex) {
Toast.makeText(getApplicationContext(),
"There are no email clients installed.",
Toast.LENGTH_SHORT).show();
}
return null;
}
@Override
protected void onPostExecute(String result) {
}
}
}