android.database.CursorWindowAllocationException：2048 kb的游标窗口分配失败。 #Open Cursors = 971（此proc = 971打开的＃游标）
您好我有一个用于查询数据库的控制器。用于异步获取数据的代码，因为我有超过1000条记录。
public void query(final Uri contentUri,
final String where,
final String[] selectionArgs,
final String sortOrder,
final int from,
final int limit,
final AdvancedQueryListener<Cursor> listener) {
if (listener == null)
return;
if (null == SamsungApp.getAppContext())
return;
final ContentResolver mContentResolver = SamsungApp.getAppContext().getContentResolver();
final Handler mHandler = Utility.instantiateHandler(new Handler.Callback() {
@Override
public boolean handleMessage(Message message) {
switch (message.what) {
case 1:
Cursor cursor = (Cursor) message.obj;
listener.onGetResult(cursor);
}
return false;
}
});
Runnable queryRunner = new Runnable() {
@Override
public void run() {
StringBuilder sqlStatement = null;
if (!TextUtils.isEmpty(sortOrder)) {
if (sqlStatement == null)
sqlStatement = new StringBuilder();
sqlStatement.append(sortOrder);
}
if (limit > 0) {
if (sqlStatement == null)
sqlStatement = new StringBuilder();
sqlStatement.append(" LIMIT ");
sqlStatement.append(limit);
}
if (from > 0) {
if (sqlStatement == null)
sqlStatement = new StringBuilder();
sqlStatement.append(" OFFSET ");
sqlStatement.append(from);
}
Cursor cursor = mContentResolver.query(contentUri, null, where, selectionArgs, sqlStatement.toString());
Message message = mHandler.obtainMessage(1);
message.obj = cursor;
mHandler.sendMessage(message);
}
};
FixedThreadPoolExecutor.execute(queryRunner);
}
我创建了一个Fixed线程池来处理我的应用程序中的所有线程。在那里，我创建了具有最多100个并发任务的Threadpool执行器;
FixedThreadPoolExecutor executor = getInstance();
executor.mThreadPoolExecutor.execute(runnable);
我的内容提供商在下面给出
public boolean close() {
if (this.isActive) {
mAppDbHelper.removeConnection();
}
int count = mAppDbHelper.getCounter();
if (count == 0) {
synchronized (mutex) {
if (mSqldb.inTransaction()) mSqldb.endTransaction();
if (mSqldb.isOpen()) mSqldb.close();
mSqldb = null;
}
}
return (count == 0);
}
public SQLiteDatabase open() {
if (!this.isActive) {
mAppDbHelper.addConnection();
}
if (mSqldb == null || !mSqldb.isOpen()) {
synchronized (mutex) {
mSqldb = mAppDbHelper.getWritableDatabase();
}
}
this.isActive = true;
return mSqldb;
}
//
@Override
public Cursor query(@NonNull Uri uri, String[] projection, String selection, String[] selectionArgs, String sortOrder) {
final SQLiteDatabase db = open();
Cursor cursor = null;
if (db != null) {
/* SQLiteQueryBuilder helps to construct queries that are more complex than
* those supported by the SQLiteDatabase functions (for example, sub queries).
*/
SQLiteQueryBuilder queryBuilder = new SQLiteQueryBuilder();
queryBuilder.setTables(uri.getLastPathSegment()); // Extract table name fromDeviceCursor uri
cursor = queryBuilder.query(db,
projection,
selection,
selectionArgs,
null,
null,
sortOrder
);
if (cursor != null) {
cursor.setNotificationUri(getContext().getContentResolver(), uri);
}
} else {
throw new DataLayerException(DEBUG_TAG + "SQLiteDatabase is null");
}
return cursor;
}
我的问题是每次如果同时查询我就会遇到问题
FATAL EXCEPTION: main
Process: com.samsung.lighting, PID: 4949
android.database.sqlite.SQLiteCantOpenDatabaseException: unable to open database file (code 14)
at android.database.sqlite.SQLiteConnection.nativeExecuteForCursorWindow(Native Method)
at android.database.sqlite.SQLiteConnection.executeForCursorWindow(SQLiteConnection.java:843)
at android.database.sqlite.SQLiteSession.executeForCursorWindow(SQLiteSession.java:836)
at android.database.sqlite.SQLiteQuery.fillWindow(SQLiteQuery.java:62)
at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:143)
at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:132)
at android.content.ContentResolver.query(ContentResolver.java:512)
at android.content.ContentResolver.query(ContentResolver.java:435)
at com.samsung.lighting.storage.repository.impl.WiSeGalleryRepositaryImpl.getNonSyncedIcon(WiSeGalleryRepositaryImpl.java:278)
at com.samsung.lighting.sync.OfflineSyncManager.syncAddedIcons(OfflineSyncManager.java:194)
at com.samsung.lighting.sync.OfflineSyncManager.startSyncing(OfflineSyncManager.java:164)
at com.samsung.lighting.sync.OfflineSyncManager.onFailure(OfflineSyncManager.java:737)
at com.wise.cloud.group.WiSeCloudGroupManager$9.onFailure(WiSeCloudGroupManager.java:1603)
at com.wise.cloud.queue.WiSeQueueManagement.addToQueue(WiSeQueueManagement.java:173)
at com.wise.cloud.queue.WiSeQueueManagement.initialCheckInToQueueManagement(WiSeQueueManagement.java:117)
at com.wise.cloud.group.WiSeCloudGroupManager.setLogicalGroupAssociations(WiSeCloudGroupManager.java:1662)
at com.samsung.lighting.cloud_interactor.CloudGroupManager.setGroupAssociations(CloudGroupManager.java:131)
at com.samsung.lighting.sync.OfflineSyncManager$7.onGetResult(OfflineSyncManager.java:391)
at com.samsung.lighting.sync.OfflineSyncManager$7.onGetResult(OfflineSyncManager.java:387)
at com.samsung.lighting.storage.repository.impl.WiSeGroupAssociationRepositoryImpl$1.onGetResult(WiSeGroupAssociationRepositoryImpl.java:344)
at com.samsung.lighting.storage.repository.impl.WiSeGroupAssociationRepositoryImpl$1.onGetResult(WiSeGroupAssociationRepositoryImpl.java:330)
at com.samsung.lighting.storage.repository.SamsungContentResolver$1.handleMessage(SamsungContentResolver.java:73)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5451)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
注意
每个人都告诉我关闭光标Cursor.close()喜欢
在我的应用程序的任何地方，我都放入了
try{
//code
}finally{
if(null!=cursor)
cursor.close
}
帮我找出问题所在。
提前致谢