public void bt_2(View v)
{
final View view=View.inflate(this, R.layout.shurudianhuahaoma, null);
et_1=(EditText)view.findViewById(R.id.et_1);
new AlertDialog.Builder(this)
.setTitle("请输入电话号码")
.setView(view)
.show();
}
et_1=(EditText)view.findViewById(R.id.et_1);要写在弹出对话框的地方
原文：http://www.cnblogs.com/1ming/p/5491968.html