final EditText inputServer = new EditText(SettingActivity.this);

                AlertDialog.Builder builder = new AlertDialog.Builder(SettingActivity.this);

                builder.setTitle("输入密码").setIcon(android.R.drawable.ic_dialog_info).setView(inputServer)

                        .setNegativeButton("取消", new DialogInterface.OnClickListener() {

                            @Override

                            public void onClick(DialogInterface dialog, int which) {

                                dialog.dismiss();

                            }

                        });

                builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {

                    public void onClick(DialogInterface dialog, int which) {

                        String text = inputServer.getText().toString();

                });

                builder.show();

            }

        });