我的数据库中有三个表，其中只有一个表在创建时插入了值。所以我的数据库代码如下。
public class AgroDatabase extends SQLiteOpenHelper {
private static String DB_NAME="AgroData";
private static String TABLE_VARIABLES="variables";
private static String TABLE_USERINFO="userinfo";
private static String TABLE_FIELDINFO="fieldinfo";
private static int DB_VERSION=1;
AgroDatabase(Context context)
{super(context,DB_NAME,null,DB_VERSION);//null is for cursors//sqlite helper classes constructor is being called
}
@Override
public void onCreate(SQLiteDatabase db){//Sqlitedatabase class gives us access to database
db.execSQL("CREATE TABLE "+TABLE_VARIABLES+"("
+"_id INTEGER PRIMARY KEY AUTOINCREMENT,"
+ "Crop_Name TEXT,"
+ "Temp_Max REAL,"
+ "Temp_Min REAL,"
+ "Humidity_Max REAL,"
+ "Humidity_Min REAL,"
+ "PH_Max REAL,"
+ "PH_Min REAL,"
+ "Rain REAL,"
+"Time_To_Harvest INTEGER,"
+ "Sunshine_Days INTEGER);");
db.execSQL("CREATE TABLE "+TABLE_USERINFO+"("
+ "_id INTEGER PRIMARY KEY AUTOINCREMENT,"
+ "User_Name TEXT,"
+ "Location TEXT,"
+ "CurrentNoFields INTEGER);");
db.execSQL("CREATE TABLE "+TABLE_FIELDINFO+"("
+ "_id INTEGER PRIMARY KEY AUTOINCREMENT,"
+ "FieldName TEXT,"
+ "Area TEXT,"
+ "Measure_Unit TEXT,"
+ "CropGrown TEXT,"
+"Growth_Date INTEGER,"
+"Growth_Month INTEGER,"
+"Growth_Year INTEGER);");
insert_Data(db,"Rice",35,20,80,60,(float)6.5,(float)5.0,1400,150,6);
insert_Data(db,"Wheat",12,30,60,50,(float)3.7,7,310,120,6);
insert_Data(db,"Soybean",27,15,60,50,6,(float)6.8,60,100,6);
insert_Data(db,"Strawberries",27,15,60,50,7,(float)3.7,310,120,6);
insert_Data(db,"Peas",(float)24.1,(float)15.5,40,60,6,(float)7.5,0,70,6);
insert_Data(db,"Potatoes",30,10,80,50,6,(float)4.5,0,110,6);
insert_Data(db,"Pumpkin",32,21,60,40,7,(float)5.5,600,100,6);
insert_Data(db,"Onions",35,21,60,40,7,6,0,100,6);
insert_Data(db,"Corn",24,15,60,40,7,(float)5.5,0,75,6);
insert_Data(db,"LimaBeans",24,18,60,40,7,6,0,80,6);
}
@Override
public void onUpgrade(SQLiteDatabase db,int oldVersion,int newVersion){
}
private static void insert_Data(SQLiteDatabase db,String name,float tempmax,float tempmin,float humiditymax,
float humidity_min,float phmax,float phmin,float rainmax,
int T2H,int Sunshine){
ContentValues crop_data= new ContentValues();
crop_data.put("Crop_Name",name);
crop_data.put("Temp_Max",tempmax);
crop_data.put("Temp_Min",tempmin);
crop_data.put("Humidity_Max",humiditymax);
crop_data.put("Humidity_Min",humidity_min);
crop_data.put("PH_Max",phmax);
crop_data.put("PH_Min",phmin);
crop_data.put("Rain",rainmax);
crop_data.put("Time_To_Harvest",T2H);
crop_data.put("Sunshine)Days",Sunshine);
db.insert("variables",null,crop_data);
}
}
但数据未填入此表。我可以访问其他类中填充数据的其他表，但我不能在这里填充数据。