android点餐软件（客户端和服务端）

package com.amaker.wlo; import java.io.InputStream; import java.net.URL; import java.net.URLConnection; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import javax.xml.parsers.DocumentBuilder; import javax.xml.parsers.DocumentBuilderFactory; import org.w3c.dom.Document; import org.w3c.dom.NodeList; import android.app.Activity; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.View.OnClickListener; import android.widget.BaseAdapter; import android.widget.EditText; import android.widget.GridView; import android.widget.ImageView; import android.widget.SimpleAdapter; import android.widget.Spinner; import android.widget.SpinnerAdapter; import android.widget.TextView; import android.widget.Toast; import com.amaker.util.HttpUtil; public class MainMenuActivity extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setTitle("掌中宝无线订餐系统-主菜单"); setContentView(R.layout.main_menu); GridView gridview = (GridView) findViewById(R.id.gridview); gridview.setAdapter(new ImageAdapter(this)); } // 继承BaseAdapter public class ImageAdapter extends BaseAdapter { // 上下文 private Context mContext; // 构造方法 public ImageAdapter(Context c) { mContext = c; } // 组件个数 public int getCount() { return mThumbIds.length; } // 当前组件 public Object getItem(int position) { return null; } // 当前组件id public long getItemId(int position) { return 0; } // 获得当前视图 public View getView(int position, View convertView, ViewGroup parent) { // 声明图片视图 ImageView imageView; if (convertView == null) { // 实例化图片视图 imageView = new ImageView(mContext); // 设置图片视图属性 imageView.setLayoutParams(new GridView.LayoutParams(85, 85)); imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); imageView.setPadding(8, 8, 8, 8); } else { imageView = (ImageView) convertView; } // 设置图片视图图片资源 imageView.setImageResource(mThumbIds[position]); // 为当前视图添加监听器 switch (position) { case 0: // 添加点餐监听器 imageView.setOnClickListener(orderLinstener); break; case 1: // 并台监听器 imageView.setOnClickListener(unionTableLinstener); break; case 2: // 添加转台监听器 imageView.setOnClickListener(changeTableLinstener); break; case 3: // 添加查台监听器 imageView.setOnClickListener(checkTableLinstener); break; case 4: // 添加更新监听器 imageView.setOnClickListener(updateLinstener); break; case 5: //添加设置监听器 //////////////////////////////////////////////////////?? break; case 6: // 添加注销监听器 imageView.setOnClickListener(exitLinstener); break; case 7: // 添加结算监听器 imageView.setOnClickListener(payLinstener); break; default: break; } return imageView; } // 图片资源数组 private Integer[] mThumbIds = { R.drawable.diancai, R.drawable.bingtai, R.drawable.zhuantai, R.drawable.chatai, R.drawable.gengxin, R.drawable.shezhi, R.drawable.zhuxiao, R.drawable.jietai }; } // 更新监听器 OnClickListener updateLinstener = new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(); // 启动更新Activity intent.setClass(MainMenuActivity.this, UpdateActivity.class); startActivity(intent); } }; // 查台监听器 OnClickListener checkTableLinstener = new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(); // 启动查台Activity intent.setClass(MainMenuActivity.this, CheckTableActivity.class); startActivity(intent); } }; // 结算监听器 OnClickListener payLinstener = new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(); // 启动结算Activity intent.setClass(MainMenuActivity.this, PayActivity.class); startActivity(intent); } }; // 订餐监听器 OnClickListener orderLinstener = new OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(); // 启动订餐Activity intent.setClass(MainMenuActivity.this, OrderActivity.class); startActivity(intent); } }; // 注销监听器 OnClickListener exitLinstener = new OnClickListener() { @Override public void onClick(View v) { logout(); } }; // 转台监听器 OnClickListener changeTableLinstener = new OnClickListener() { @Override public void onClick(View v) { changeTable(); } }; // 并台监听器 OnClickListener unionTableLinstener = new OnClickListener() { @Override public void onClick(View v) { unionTable(); } }; // 换台系统 private void changeTable(){ // 获得LayoutInflater实例 LayoutInflater inflater = LayoutInflater.from(this); // 获得LinearLayout视图实例 View v =inflater.inflate(R.layout.change_table, null); // 从LinearLayout中获得EditText实例 final EditText et1 = (EditText) v.findViewById(R.id.change_table_order_number_EditText); final EditText et2 = (EditText) v.findViewById(R.id.change_table_no_EditText); AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setMessage(" 真的要换桌位吗？") .setCancelable(false) .setView(v) .setPositiveButton("确定", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { // 获得订单号 String orderId = et1.getText().toString(); // 获得桌号 String tableId = et2.getText().toString(); // 查询参数 String queryString = "orderId="+orderId+"&tableId="+tableId; // url String url = HttpUtil.BASE_URL+"servlet/ChangeTableServlet?"+queryString; // 查询返回结果 String result = HttpUtil.queryStringForPost(url); // 显示结果 Toast.makeText(MainMenuActivity.this,result,Toast.LENGTH_LONG).show(); } }) .setNegativeButton("取消", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { dialog.cancel(); } }); AlertDialog alert = builder.create(); alert.show(); } // 并台系统 private void unionTable(){ // 实例化LayoutInflater LayoutInflater inflater = LayoutInflater.from(this); // 获得自定义视图 View v =inflater.inflate(R.layout.union_table, null); // 获得Spinner final Spinner spinner1 = (Spinner) v.findViewById(R.id.union_table_Spinner1); final Spinner spinner2 = (Spinner) v.findViewById(R.id.union_table_Spinner2); // 访问服务器的URL String urlStr = HttpUtil.BASE_URL + "servlet/UnionTableServlet"; try { // 实例化URL URL url = new URL(urlStr); // URLConnection 实例 URLConnection conn = url.openConnection(); // 获得输入流 InputStream in = conn.getInputStream(); // 获得DocumentBuilderFactory对象 DocumentBuilderFactory factory = DocumentBuilderFactory .newInstance(); // 获得DocumentBuilder对象 DocumentBuilder builder = factory.newDocumentBuilder(); // 获得Document对象 Document doc = builder.parse(in); // 获得节点列表 NodeList nl = doc.g