android-cursor

问题 I am developing an application which download some files and save their text in file_content field to database. The file sizes can vary from some KBs to 10 MB. The app works for all sizes while saving. The problem occurs when using select statement on long file_content records. It gives java.lang.IllegalStateException: Couldn't read row 0, col 0 from CursorWindow when fetching such rows. Are there any limits on field content size? If so, then why it is letting us to save and giving error

问题 I have a from that a user fills in and their data is stored in a row using SQLite, a cursor gets their details from the table and outputs it in a listView. I want the user to be able to fill in that form again so as to update their details and display the new details in the listview in replace of the old details that are there. What happens at the moment is that when the user updates their details (fills in form again) then another row is created and that new row is outputed in the along with

问题 I have the codes work for loading image from gallery but I really do not understand how it works. Here are the codes. @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == RESULT_LOAD_IMAGE && resultCode == RESULT_OK && null != data) { //Browse Gallery is requested Uri selectedImage = data.getData(); String[] filePathColumn = { MediaStore.Images.Media.DATA }; Cursor cursor =

问题 I'm storing a picture from my Camera like this: String newName = new BigInteger(130, new SecureRandom()) .toString(24); File mydir = new File(Environment.getExternalStorageDirectory().getAbsolutePath(), CameraActivity.DIR_PICTURES); mydir.mkdirs(); fileWithinMyDir = new File(mydir, newName + ".png"); out = new FileOutputStream(fileWithinMyDir); finalBitmap.compress(Bitmap.CompressFormat.PNG, 100, out); where CameraActivity.DIR_PICTURES stands for "com.korcholis.testapp/pictures" . Nothing

问题 This is a follow up to my question here: How to close a cursor used in a for loop The responses solved the "Cursor finalized without prior close" warning but it has caused a StaleDataException in a very particular situation. If the list has been scrolled, this cursor closed... Cursor cursor = null; cursor = (Cursor) getListView().getItemAtPosition(n); //do something if(cursor != null) { cursor.close(); } and the fragment backgrounded I get the following error: 09-15 21:16:58.240: E/test(21621

问题 I know this question has asked many times in SO,but i couldn't figure out my exact problem. I am using the following code to get the data from the database(Table1) and update another Table2 based on retrieval value. Its working fine in some android versions but when i gone to test with Android 4.0.3. I am geting this java.lang.IllegalStateException:?.attempt to re-open an already-closed object at sum_cursor.moveToNext(); . I am using this code in AsyncTask. /** Sum of total matched values*/

问题 I'm trying to use the SortCursor class from the AOSP mentioned in How to represent 2 cursors as 1 sorted cursor?. However it doesn't seem to sort the cursors I give at all. How does the sorting work? Example code: String[] columnNames = {"name", "value"}; MatrixCursor matrixCursor1 = new MatrixCursor(columnNames); matrixCursor1.addRow(new String[]{"cursor 1 value A", "9"}); matrixCursor1.addRow(new String[]{"cursor 1 value B", "2"}); matrixCursor1.addRow(new String[]{"cursor 1 value C", "1"})

问题 My question if fairly simple, I have this segment of code Cursor mCursor = this.getContentResolver().query( PlayerContentProviderDB.CONTENT_URI, fulldataColumns, null, null, Players.SCORE +" ASC"); This code, from everything I've seen, should be sorting the cursor in ascending order based on Players.SCORE but it is not. For reference Players.SCORE will always be a string in the format mm:ss:msmsms ( read minute:second:millisecond). Also here is the code for the query method in my

问题 My Query is SELECT DefaultId FROM tblsample where ('567' = DefaultId) || ('567' = Name) In the above query table name = tblsample Column Names = DefaultId , Name Input Value = 567 Now i want to check this value is available in which column from the table and return its DefaultId . I am able to achieve this in Sqlite, want to know is there still better way to optimize the query and In android using database.query(boolean distinct, String table, String[] columns,String selection, String[]

问题 I have a DB in which id's are change after few rows, then same I'd in some rows then change I'd. What I want that, the same I'd values will be populated listview's in one line, then when the Ids are same, they are all in one row. And thus the next rows populate with same rows which have same ID's. My DB columns and rows are as follows: Verse_id -------words_id----------words_ar------ translate_bn-- 1-----------------------1---------------Mamun-----------Assistant--- 1-----------------------2-