我在使用 SQLite 时遇到问题，我不知道该如何解决
我不知道这个错误是否会导致 OutOfMemoryError 因为我也有这个错误所以请帮助我解决这个错误
A SQLiteConnection object for database ......... was leaked!
My database code
public class DB_Sqlit extends SQLiteOpenHelper {
public static final String BDname = "mdata.db";
public DB_Sqlit(Context context) {
super(context, BDname, null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table favorite ( id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, img TEXT, url TEXT, num TEXT, size TEXT)");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS favorite");
onCreate(db);
}
public Boolean Insert_to_favorite(String name, String img, String url, String num, String size) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("name", name);
contentValues.put("img", img);
contentValues.put("url", url);
contentValues.put("num", num);
contentValues.put("size", size);
long result = db.insert("favorite", null, contentValues);
if (result == -1)
return false;
else
return true;
}
public List getAllList_Favorite() {
List<listitem_gib> list = new ArrayList<listitem_gib>();
SQLiteDatabase db = this.getReadableDatabase();
Cursor rs = db.rawQuery("select * from favorite", null);
if (rs.moveToFirst()){
do {
listitem_gib model = new listitem_gib();
model.setId(rs.getString(0));
model.setName(rs.getString(1));
model.seturl(rs.getString(3));
model.setimg(rs.getString(2));
model.setnum(rs.getString(4));
model.setsize(rs.getString(5));
list.add(model);
}while (rs.moveToNext());
}
Log.d("rewayat data", list.toString());
return list;
}
public int get_check_List_Favorite(String Title) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor rs = db.rawQuery("select * from favorite Where name like '"+ Title +"'", null);
rs.moveToFirst();
Cursor cursor = null;
try {
int count = rs.getCount();
return count;
// do some work with the cursor here.
} finally {
// this gets called even if there is an exception somewhere above
if(cursor != null)
cursor.close();
}
}
public Integer DeleteFav(String id) {
SQLiteDatabase db = this.getWritableDatabase();
return db.delete("favorite", "id = ?", new String[]{id});
}}}
请问我该如何解决这个错误？
我怀疑这个错误会导致 OutOfMemoryError 吗？
database edit
public class DB_Sqlit extends SQLiteOpenHelper {
public static final String BDname = "mdata.db";
public DB_Sqlit(Context context) {
super(context, BDname, null, 1);
}
@Override
public void onCreate(SQLiteDatabase db) {
db.execSQL("create table favorite ( id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, img TEXT, url TEXT, num TEXT, size TEXT)");
db.execSQL("create table download ( id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, img TEXT, url TEXT, num TEXT, size TEXT)");
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
db.execSQL("DROP TABLE IF EXISTS favorite");
db.execSQL("DROP TABLE IF EXISTS download");
onCreate(db);
}
public Boolean Insert_to_favorite(String name, String img, String url, String num, String size) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("name", name);
contentValues.put("img", img);
contentValues.put("url", url);
contentValues.put("num", num);
contentValues.put("size", size);
long result = db.insert("favorite", null, contentValues);
db.close();
if (result == -1)
return false;
else
return true;
}
public List getAllList_Favorite() {
List<listitem_gib> list = new ArrayList<listitem_gib>();
SQLiteDatabase db = this.getReadableDatabase();
Cursor rs = db.rawQuery("select * from favorite", null);
if (rs.moveToFirst()){
do {
listitem_gib model = new listitem_gib();
model.setId(rs.getString(0));
model.setName(rs.getString(1));
model.seturl(rs.getString(3));
model.setimg(rs.getString(2));
model.setnum(rs.getString(4));
model.setsize(rs.getString(5));
list.add(model);
}while (rs.moveToNext());
}
Log.d("rewayat data", list.toString());
rs.close();
db.close();
return list;
}
public int get_check_List_Favorite(String Title) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor rs = db.rawQuery("select * from favorite Where name like '"+ Title +"'", null);
rs.moveToFirst();
Cursor cursor = null;
try {
int count = rs.getCount();
return count;
// do some work with the cursor here.
} finally {
// this gets called even if there is an exception somewhere above
if(cursor != null){
rs.close();
db.close();
}
}
}
public Integer DeleteFav(String id) {
SQLiteDatabase db = this.getWritableDatabase();
return db.delete("favorite", "id = ?", new String[]{id});
}
public Boolean Insert_to_download(String name, String img, String url, String num, String size) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues contentValues = new ContentValues();
contentValues.put("name", name);
contentValues.put("img", img);
contentValues.put("url", url);
contentValues.put("num", num);
contentValues.put("size", size);
long result = db.insert("download", null, contentValues);
db.close();
if (result == -1)
return false;
else
return true;
}
public List getAllList_download() {
List<listitem_gib> list = new ArrayList<listitem_gib>();
SQLiteDatabase db = this.getReadableDatabase();
Cursor rs = db.rawQuery("select * from download", null);
if (rs.moveToFirst()){
do {
listitem_gib model = new listitem_gib();
model.setId(rs.getString(0));
model.setName(rs.getString(1));
model.seturl(rs.getString(3));
model.setimg(rs.getString(2));
model.setnum(rs.getString(4));
model.setsize(rs.getString(5));
list.add(model);
}while (rs.moveToNext());
}
Log.d("rewayat data", list.toString());
rs.close();
db.close();
return list;
}
public int get_check_List_download(String Title) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor rs = db.rawQuery("select * from download Where name like '"+ Title +"'", null);
rs.moveToFirst();
Cursor cursor = null;
try {
int count = rs.getCount();
return count;
// do some work with the cursor here.
} finally {
// this gets called even if there is an exception somewhere above
if(cursor != null) {
rs.close();
db.close();
}
}
}
public Integer Deletedown(String id) {
SQLiteDatabase db = this.getWritableDatabase();
return db.delete("download", "id = ?", new String[]{id});
}}
最佳答案
OutOfMemoryError ？ ，记住你必须关闭所有的游标:
public List getAllList_Favorite() {
List<listitem_gib> list = new ArrayList<listitem_gib>();
SQLiteDatabase db = this.getReadableDatabase();
Cursor rs = db.rawQuery("select * from favorite", null);
if (rs.moveToFirst()){
do {
listitem_gib model = new listitem_gib();
model.setId(rs.getString(0));
model.setName(rs.getString(1));
model.seturl(rs.getString(3));
model.setimg(rs.getString(2));
model.setnum(rs.getString(4));
model.setsize(rs.getString(5));
list.add(model);
}while (rs.moveToNext());
}
Log.d("rewayat data", list.toString());
cursor.close(); //*** Add this line!
return list;
}
如果您收到此消息:
Please fix your application to end transactions in progress properly and to close the database when it is no longer needed.
请务必关闭应用程序中的所有光标。
关于Android SQLite 数据库泄露错误，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/40921031/