sqlite本地保存数据

 package com.cesecsh.ics.database;

 import android.content.Context;
 import android.database.Cursor;
 import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;

 import java.util.ArrayList;
 import java.util.List;

 /**
  * Created by fans on 2016/12/22.
  */

 public class OrderSearchHistoryDbHelp extends SQLiteOpenHelper {
     /**
      * 创建数据库
      *
      * @param context
      */
     public OrderSearchHistoryDbHelp(Context context) {
         super(context, "myorder.db", null, 1);
     }

     @Override
     public void onCreate(SQLiteDatabase db) {
         String schema = "create table myorder("
                 + "_id integer primary key autoincrement,"
                 + "keyword)";
         // 执行SQL语句
         db.execSQL(schema);

     }

     /**
      * 增
      *
      * @param keyword
      */
     public void insert(String keyword) {
         String sql = "insert into myorder(keyword)" +
                 " values(?)";
         SQLiteDatabase db = this.getWritableDatabase();
         db.execSQL(sql, new String[]{keyword});
         db.close();
     }

     /**
      * 清空记录
      */
     public void clearRecord() {
         String sql = "delete from myorder";
         SQLiteDatabase db = this.getWritableDatabase();
         db.execSQL(sql);
         db.close();
     }

     /**
      * 查
      *
      * @return
      */
     public Cursor select() {
         String sql = "select * from myorder order by _id asc";
         SQLiteDatabase db = this.getReadableDatabase();
         Cursor c = db.rawQuery(sql, null);
         return c;
     }

     /**
      * 获得keyword
      *
      * @return
      */
     public List<String> getKeyWord() {
         String sql = "select * from myorder order by _id asc";
         SQLiteDatabase db = this.getReadableDatabase();
         Cursor c = db.rawQuery(sql, null);

         List<String> list = new ArrayList<>();
         while (c.moveToNext()) {
             String keyword = c.getString(c.getColumnIndex("keyword"));
             list.add(keyword);
         }
         c.close();
         db.close();

         return list;
     }

     @Override
     public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

     }
 }