我试图在我的小android项目中使用意图电子邮件，但它不起作用.有人能帮我找出错误吗?

Question

public void submit_order(View View){//用于ORDER按钮EditText name_var = (EditText) findViewById(R.id.name);field = name_var.getText().toString();

Intent intent = new Intent(Intent.ACTION_SENDTO);                // only email apps should handle this
intent.setData(Uri.parse("mailto:"));
intent.putExtra(Intent.EXTRA_SUBJECT, "Just Java order for " + field);
if (intent.resolveActivity(getPackageManager()) != null) {
startActivity(intent);
}
display_message(field, number_of_coffee);
}

Answer 1

在mailto字符串中添加电子邮件地址，先生。