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AntennaPod
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Code Issues Packages Projects Releases Wiki Activity

Fixed crash that occured if DB had saved a very large feed

This commit is contained in:
daniel oeh 2012-09-13 14:18:11 +02:00
parent 33711e1657
commit 71f948cafa
1 changed files with 43 additions and 11 deletions
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54
src/de/danoeh/antennapod/storage/PodDBAdapter.java
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@ -1,24 +1,24 @@
package de.danoeh.antennapod.storage;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import de.danoeh.antennapod.AppConfig;
import de.danoeh.antennapod.asynctask.DownloadStatus;
import de.danoeh.antennapod.feed.Feed;
import de.danoeh.antennapod.feed.FeedCategory;
import de.danoeh.antennapod.feed.FeedImage;
import de.danoeh.antennapod.feed.FeedItem;
import de.danoeh.antennapod.feed.FeedMedia;
import de.danoeh.antennapod.feed.SimpleChapter;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.MergeCursor;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteDatabase.CursorFactory;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;
import de.danoeh.antennapod.AppConfig;
import de.danoeh.antennapod.asynctask.DownloadStatus;
import de.danoeh.antennapod.feed.Feed;
import de.danoeh.antennapod.feed.FeedImage;
import de.danoeh.antennapod.feed.FeedItem;
import de.danoeh.antennapod.feed.FeedMedia;
import de.danoeh.antennapod.feed.SimpleChapter;
/**
* Implements methods for accessing the database
@ -28,6 +28,9 @@ public class PodDBAdapter {
private static final int DATABASE_VERSION = 5;
private static final String DATABASE_NAME = "Antennapod.db";
/** Maximum number of arguments for IN-operator. */
public static final int IN_OPERATOR_MAXIMUM = 800;
// ----------- Column indices
// ----------- General indices
public static final int KEY_ID_INDEX = 0;
@ -548,8 +551,37 @@ public class PodDBAdapter {
}
public final Cursor getFeedMediaCursor(String... mediaIds) {
return db.query(TABLE_NAME_FEED_MEDIA, null, KEY_ID + " IN "
+ buildInOperator(mediaIds.length), mediaIds, null, null, null);
int length = mediaIds.length;
if (length > IN_OPERATOR_MAXIMUM) {
Log.w(TAG, "Length of id array is larger than "
+ IN_OPERATOR_MAXIMUM + ". Creating multiple cursors");
int numCursors = (int) (((double) length) / (IN_OPERATOR_MAXIMUM)) + 1;
Cursor[] cursors = new Cursor[numCursors];
for (int i = 0; i < numCursors; i++) {
int neededLength = 0;
String[] parts = null;
final int elementsLeft = length - i * IN_OPERATOR_MAXIMUM;
if (elementsLeft >= IN_OPERATOR_MAXIMUM) {
neededLength = IN_OPERATOR_MAXIMUM;
parts = Arrays.copyOfRange(mediaIds, i
* IN_OPERATOR_MAXIMUM, (i + 1)
* IN_OPERATOR_MAXIMUM);
} else {
neededLength = elementsLeft;
parts = Arrays.copyOfRange(mediaIds, i
* IN_OPERATOR_MAXIMUM, (i * IN_OPERATOR_MAXIMUM) + neededLength);
}
cursors[i] = db.rawQuery("SELECT * FROM "
+ TABLE_NAME_FEED_MEDIA + " WHERE " + KEY_ID + " IN "
+ buildInOperator(neededLength), parts);
}
return new MergeCursor(cursors);
} else {
return db.query(TABLE_NAME_FEED_MEDIA, null, KEY_ID + " IN "
+ buildInOperator(length), mediaIds, null, null, null);
}
}
/** Builds an IN-operator argument depending on the number of items. */