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[英]Inserting Content Values in multiple tables in Sqlite Android Application
[英]Error Inserting into multiple tables SQLite Android
我有一个非常直接的错误。 在我的SQLiteHelper中,我创建了2个表:
import android.content.ContentValues;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.annotation.Nullable;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import com.letscook.thanhta.letscook.R;
import java.io.ByteArrayOutputStream;
public class SQLiteHelper extends SQLiteOpenHelper {
public SQLiteHelper(Context context) {
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
private static final int DATABASE_VERSION = 1;
private static final String DATABASE_NAME = "CookBook.db";
protected static final String RECIPE_CATEGORY = "RECIPE_CATEGORY";
protected static final String INGREDIENT_TYPE = "INGREDIENT_TYPE";
public static final String CREATE_RECIPE_CATEGORY = "create table if not exists "
+ RECIPE_CATEGORY +
"(Recipe_Category_id INTEGER PRIMARY KEY," +
"Recipe_Category_name TEXT, " +
"Description TEXT);";
public static final String CREATE_INGREDIENT_TYPE= "create table if not exists " +
INGREDIENT_TYPE +
"(Ingredient_type_id INTEGER PRIMARY KEY ," +
"Ingredient_type_name TEXT);";
@Override
public void onCreate(SQLiteDatabase db) {
try{
db = getWritableDatabase();
db.execSQL(CREATE_RECIPE_CATEGORY);
db.execSQL(CREATE_INGREDIENT_TYPE);
db.close();}
catch(Exception e){
e.printStackTrace();
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("drop table if exists " + RECIPE_CATEGORY);
db.execSQL("drop table if exists " + INGREDIENT_TYPE);
onCreate(db);
}
在MainActivity中,我插入这两个表
public class DataBaseInsertActivity extends ActionBarActivity {
ContentValues values = new ContentValues();
private void Insert(ContentValues values, String table) {
db.insert(table,null,values);
}
public void doInsertRECIPE_CATEGORY(int id, String name, String description){
values.put("Recipe_Category_id", id);
values.put("Recipe_Category_name",name);
values.put("Description", description);
Insert(values, "RECIPE_CATEGORY");
}
public void doInsertINGREDIENT_TYPE(int id, String name){
values.put("Ingredient_type_id",id);
values.put("Ingredient_type_name",name);
Insert(values, "INGREDIENT_TYPE");
}
SQLiteDatabase db;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_data_base);
//CREATE database
SQLiteHelper helper = new SQLiteHelper(this);
db = helper.getWritableDatabase();
}
doInsertRECIPE_CATEGORY(0, "All", "All recipes"); doInsertRECIPE_CATEGORY(1, "Snack", "Fast and fun!"); doInsertINGREDIENT_TYPE(0, "meat"); doInsertINGREDIENT_TYPE(1, "fish"); }}
错误:
09-09 18:50:58.494 12358-12358/com.letscook.thanhta.letscook E/SQLiteLog﹕ (1) near "Recipe_id": syntax error
09-09 18:50:58.518 12358-12358/com.letscook.thanhta.letscook E/SQLiteLog﹕ (1) no such table: INGREDIENT_TYPE
09-09 18:50:58.518 12358-12358/com.letscook.thanhta.letscook E/SQLiteDatabase﹕ Error inserting Ingredient_type_name=meat Description=Fast and fun! Ingredient_type_id=0 Recipe_Category_name=Snack Recipe_Category_id=1
android.database.sqlite.SQLiteException: no such table: INGREDIENT_TYPE (code 1): , while compiling: INSERT INTO INGREDIENT_TYPE(Ingredient_type_name,Description,Ingredient_type_id,Recipe_Category_name,Recipe_Category_id) VALUES (?,?,?,?,?)
我不知道为什么“Recipe_Category_name”和“Recipe_Category_id”在插入第二个表时仍然在Insert中。
您不能在SQLiteDatabaseHelper
onCreate()
调用getWritableDatabase()
onCreate()
。 这会因“被称为递归”异常而失败。
在那里,删除close()
和try
- catch
。 如果出现问题,则需要抛出而不是忽略。
卸载并重新安装您的应用程序以触发onCreate()
再次被调用。
我找到了解决方案! 这是因为在类DataBaseInsertActivity
导致错误
ContentValues values = new ContentValues();
已经放入onCreate
,它应该像这样分成单独的类:
public void doInsertRECIPE_CATEGORY(int id, String name, String description) {
ContentValues values = new ContentValues();
values.put("Recipe_Category_id", id);
values.put("Recipe_Category_name",name);
values.put("Description", description);
Insert(values, "RECIPE_CATEGORY");
}
public void doInsertINGREDIENT_TYPE(int id, String name){
ContentValues values = new ContentValues();
values.put("Ingredient_type_id",id);
values.put("Ingredient_type_name",name);
Insert(values, "INGREDIENT_TYPE");
}
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