我现在正在努力为数据库添加一些内置值以供以后检索，并按如下方式执行。但它报告错误，从id = 102开始，在init_food_DB()执行fill_food_DB()的过程中无法写入数据库，并且可能在Inflate_All_Food_Data过程中检索时进一步导致错误。
在此应用程序中，我之前创建了另一个数据库（“first_database”）。可以正确执行，写入和检索第一个数据库。
基于成功，我因此完全从这个first_database复制，然后只将value.length替换为248，并仅替换内容。
为什么第一个数据库可以正常执行，但是这个食物数据库在id = 102时停止填充？
作为参考，第一个数据库的ContentValues为63。
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.food_main);
init_food_DB();
if(Food_dbHlp == null)
Food_dbHlp = new Food_DataBaseHelper(this);
food = Food_dbHlp.get_All_food_Data(); //LINE 221
int i = food.size();
for (int j = 0; j < i; j++)
{
Inflate_All_Food_Data(j);
}
}
private void init_food_DB()
{
if(Food_dbHlp == null)
Food_dbHlp = new Food_DataBaseHelper(this);
Food_dbHlp.fill_food_DB();
}
public class Food_DataBaseHelper extends SQLiteOpenHelper
{
private static final String DATABASE_NAME = "food";
private static final int DATABASE_VERSION = 1;
private static final String TABLE_NAME = "table_food";
private static final String TABLE_CREATE =
"CREATE TABLE " + TABLE_NAME + " ( " +
" id TEXT NOT NULL, " +
" food_group TEXT NOT NULL, " +
" food_name TEXT, " +
" food_qty TEXT, " +
" food_cal TEXT, PRIMARY KEY (id)); ";
public static final String COL_id = "id";
public static final String COL_food_group = "food_group";
public static final String COL_food_name = "food_name";
public static final String COL_food_qty = "food_qty";
public static final String COL_food_cal = "food_cal";
public Food_DataBaseHelper(Context context)
{
super(context, DATABASE_NAME, null, DATABASE_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db)
{
db.execSQL(TABLE_CREATE);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
db.execSQL("DROP TABLE IF EXISTS " + TABLE_NAME);
onCreate(db);
}
public void fill_food_DB()
{
SQLiteDatabase db = getWritableDatabase();
ContentValues[] values = new ContentValues[248];
for(int i=0; i<values.length; i++)
values[i] = new ContentValues();
values[0].put("id", "001");
values[0].put("food_group", "Snacks");
values[0].put("food_name","Chestnuts");
values[0].put("food_qty","100g");
values[0].put("food_cal","170");
values[1].put("id", "002");
values[1].put("food_group", "Snacks");
values[1].put("food_name","Brazil apricots");
values[1].put("food_qty","100g");
values[1].put("food_cal","619");
...
...
values[247].put("id", "248");
values[247].put("food_group", "Milk product");
values[247].put("food_name","Crispy chocolate ice cream sticks");
values[247].put("food_qty","1 cup");
values[247].put("food_cal","372");
for(ContentValues row : values)
{
db.insert(TABLE_NAME, null, row);
}
db.close();
}
public ArrayList<Food> get_All_food_Data()
{
SQLiteDatabase db = getReadableDatabase();
String[] columns = {COL_id, COL_food_group, COL_food_name, COL_food_qty, COL_food_cal};
Cursor cursor = db.query(TABLE_NAME, columns, null, null, null, null, COL_id); //LINE 1308
ArrayList<Food> foods = new ArrayList<Food>();
while(cursor.moveToNext()){
String id = cursor.getString(0);
String food_group = cursor.getString(1);
String food_name = cursor.getString(2);
String food_qty = cursor.getString(3);
String food_cal = cursor.getString(4);
Food food = new Food(id, food_group, food_name, food_qty, food_cal);
foods.add(food);
}
cursor.close();
db.close();
return foods;
}
但是当id达到102时报告错误
08-03 22:03:20.570: E/SQLiteLog(8105): (1) no such table: table_food
08-03 22:03:20.615: E/SQLiteDatabase(8105): Error inserting id=102 food_name=Tomato food_group=Fruits & vegetables food_qty=100g food_cal=14
08-03 22:03:20.615: E/SQLiteDatabase(8105): android.database.sqlite.SQLiteException: no such table: table_food (code 1): , while compiling: INSERT INTO table_food(id,food_name,food_group,food_qty,food_cal) VALUES (?,?,?,?,?)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1013)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:624)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1467)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1339)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at com.abc.abc.Abc_Food_DataBaseHelper.fill_food_DB(Abc_Food_DataBaseHelper.java:1299)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at com.abc.abc.Food_MainActivity.init_food_DB(Food_MainActivity.java:262)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at com.abc.abc.Food_MainActivity.onCreate(Food_MainActivity.java:64)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.app.Activity.performCreate(Activity.java:5206)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.app.ActivityThread.access$700(ActivityThread.java:140)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.os.Handler.dispatchMessage(Handler.java:99)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.os.Looper.loop(Looper.java:137)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at android.app.ActivityThread.main(ActivityThread.java:4921)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at java.lang.reflect.Method.invokeNative(Native Method)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at java.lang.reflect.Method.invoke(Method.java:511)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
08-03 22:03:20.615: E/SQLiteDatabase(8105): at dalvik.system.NativeStart.main(Native Method)
08-03 22:03:20.615: E/SQLiteLog(8105): (1) no such table: table_food
08-03 22:03:20.615: E/SQLiteDatabase(8105): Error inserting id=103 food_name=Chinese water chestnut food_group=Fruits & vegetables food_qty=100g food_cal=68
...
...keep continue for every id from 102 to 248
...
08-03 22:03:21.245: E/SQLiteDatabase(8105): Error inserting id=248 food_name=Crispy chocolate ice cream sticks food_group=Milk product food_qty=1 cup food_cal=372
08-03 22:03:21.245: E/SQLiteDatabase(8105): android.database.sqlite.SQLiteException: no such table: table_food (code 1): , while compiling: INSERT INTO table_food(id,food_name,food_group,food_qty,food_cal) VALUES (?,?,?,?,?)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1013)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:624)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteDatabase.insertWithOnConflict(SQLiteDatabase.java:1467)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.database.sqlite.SQLiteDatabase.insert(SQLiteDatabase.java:1339)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at com.abc.abc.Abc_Food_DataBaseHelper.fill_food_DB(Abc_Food_DataBaseHelper.java:1299)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at com.abc.abc.Food_MainActivity.init_food_DB(Food_MainActivity.java:262)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at com.abc.abc.Food_MainActivity.onCreate(Food_MainActivity.java:64)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.app.Activity.performCreate(Activity.java:5206)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.app.ActivityThread.access$700(ActivityThread.java:140)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.os.Handler.dispatchMessage(Handler.java:99)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.os.Looper.loop(Looper.java:137)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at android.app.ActivityThread.main(ActivityThread.java:4921)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at java.lang.reflect.Method.invokeNative(Native Method)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at java.lang.reflect.Method.invoke(Method.java:511)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
08-03 22:03:21.245: E/SQLiteDatabase(8105): at dalvik.system.NativeStart.main(Native Method)
08-03 22:03:21.265: E/SQLiteLog(8105): (1) no such table: table_food
08-03 22:03:21.285: D/AndroidRuntime(8105): Shutting down VM
08-03 22:03:21.285: W/dalvikvm(8105): threadid=1: thread exiting with uncaught exception (group=0x41c572a0)
08-03 22:03:21.285: E/AndroidRuntime(8105): FATAL EXCEPTION: main
08-03 22:03:21.285: E/AndroidRuntime(8105): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.abc.abc/com.abc.abc.Food_MainActivity}: android.database.sqlite.SQLiteException: no such table: table_food (code 1): , while compiling: SELECT id, food_group, food_name, food_qty, food_cal FROM table_food ORDER BY id
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2110)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2135)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.app.ActivityThread.access$700(ActivityThread.java:140)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1237)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.os.Handler.dispatchMessage(Handler.java:99)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.os.Looper.loop(Looper.java:137)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.app.ActivityThread.main(ActivityThread.java:4921)
08-03 22:03:21.285: E/AndroidRuntime(8105): at java.lang.reflect.Method.invokeNative(Native Method)
08-03 22:03:21.285: E/AndroidRuntime(8105): at java.lang.reflect.Method.invoke(Method.java:511)
08-03 22:03:21.285: E/AndroidRuntime(8105): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1027)
08-03 22:03:21.285: E/AndroidRuntime(8105): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:794)
08-03 22:03:21.285: E/AndroidRuntime(8105): at dalvik.system.NativeStart.main(Native Method)
08-03 22:03:21.285: E/AndroidRuntime(8105): Caused by: android.database.sqlite.SQLiteException: no such table: table_food (code 1): , while compiling: SELECT id, food_group, food_name, food_qty, food_cal FROM table_food ORDER BY id
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:1013)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:624)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:44)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1314)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1161)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1032)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1200)
08-03 22:03:21.285: E/AndroidRuntime(8105): at com.abc.abc.Abc_Food_DataBaseHelper.get_All_food_Data(Abc_Food_DataBaseHelper.java:1308)
08-03 22:03:21.285: E/AndroidRuntime(8105): at com.abc.abc.Food_MainActivity.onCreate(Food_MainActivity.java:221)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.app.Activity.performCreate(Activity.java:5206)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
08-03 22:03:21.285: E/AndroidRuntime(8105): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2074)
08-03 22:03:21.285: E/AndroidRuntime(8105): ... 11 more
答案 0 :(得分：0)
我猜两件事之一。也许您有权限问题，而且根本没有权利在数据库中创建表（或者错误地使用数据库）。
或者，该表可能已经存在。如果是这样，你可以这样做：
create table if not exists . . .
而不是：
create table . . .
要初始化类，您可能希望删除表中的任何数据。创建后，您可以：
delete from . . .;
或在创作之前：
drop table if exists . . .;
实际上，放弃桌面是一种更好的方法。如果您决定更改表结构，那么您就知道它将被实现。