将预先存在的数据库复制到新创建的数据库后，我收到错误消息，该数据库用于填充带有标题的列表视图。这一切都很好，但是一旦我滚动列表视图，我就会收到关于数据库未关闭的错误。
我不知道在哪里放置 close 声明。我已经在我的活动超类的 onDestroy() 方法中使用，并在每次使用游标填充用于列表视图的数组时打开和关闭数据库。
我在这里查看了其他问题，但我似乎无法找到这个特定问题的答案。
非常感谢
继承人logcat：
12-11 12:55:58.072: E/Database(17830): close() was never explicitly called on database '/data/data/com.sil.android.bofseg2012/databases/bofsegdb1'
12-11 12:55:58.072: E/Database(17830): android.database.sqlite.DatabaseObjectNotClosedException: Application did not close the cursor or database object that was opened here
12-11 12:55:58.072: E/Database(17830): at android.database.sqlite.SQLiteDatabase.<init>(SQLiteDatabase.java:1810)
12-11 12:55:58.072: E/Database(17830): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:817)
12-11 12:55:58.072: E/Database(17830): at com.sil.android.bofseg2012.DBHelper.openDatabase(DBHelper.java:108)
12-11 12:55:58.072: E/Database(17830): at com.sil.android.bofseg2012.DBHelper.getDatabase(DBHelper.java:121)
12-11 12:55:58.072: E/Database(17830): at com.sil.android.bofseg2012.GamesList.<init>(GamesList.java:55)
12-11 12:55:58.072: E/Database(17830): at com.sil.android.bofseg2012.ContentsActivity.populateLists(ContentsActivity.java:49)
12-11 12:55:58.072: E/Database(17830): at com.sil.android.bofseg2012.ContentsActivity.onResume(ContentsActivity.java:102)
12-11 12:55:58.072: E/Database(17830): at android.app.Instrumentation.callActivityOnResume(Instrumentation.java:1149)
12-11 12:55:58.072: E/Database(17830): at android.app.Activity.performResume(Activity.java:3823)
这是我的 dbOpenHelper 类：
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import android.content.ContentValues;
import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
public class DBHelper extends SQLiteOpenHelper
{
private static final String DB_PATH = "/data/data/com.sil.android.bofseg2012/databases/";
private static final String DB_NAME = "bofsegdb1";
private static final int VERSION = 1;
private static final String TABLE_NAME = "bofseg_full_1";
protected static final String SEARCHABLE_TABLE = "searchable_table";
private static final String KEY_ID = "_id";
private static final String GAME_NAME = "game_name";
private static final String PLAYERS = "players";
private static final String VENUE = "venue";
private static final String DURATION = "duration";
private static final String EQUIPMENT = "equipment";
private static final String SECTION = "section";
private static final String FAVES = "fave";
private SQLiteDatabase myDB;
private final Context dbContext;
public DBHelper(Context context)
{
super(context, DB_NAME, null, VERSION);
this.dbContext=context;
}
// check the imported database exists
private boolean checkDatabase()
{
File dbFile = new File(DB_PATH + DB_NAME);
boolean dbExists = dbFile.exists();
return dbExists;
}
private void createAndCopyDataBase() throws IOException
{
if(!this.checkDatabase())
{
try
{
this.getWritableDatabase();
} catch (Exception e1)
{
System.out.println("Error creating system db");
e1.printStackTrace();
}
try
{
this.copyDatabase();
//System.out.println("db copied");
}catch(IOException e)
{
throw new Error("Error copying database");
}
finally
{
try
{
this.close();
} catch (Exception e)
{
e.printStackTrace();
}
}
System.out.println("DB created and copied and closed successfully");
}
}
private void copyDatabase() throws IOException
{
InputStream myInput = dbContext.getAssets().open(DB_NAME);
String outFileName = DB_PATH + DB_NAME;
OutputStream myOutput = new FileOutputStream(outFileName);
byte[] buffer = new byte[1024];
int length;
while((length = myInput.read(buffer))>0)
{
myOutput.write(buffer,0,length);
}
myOutput.flush();
myOutput.close();
myInput.close();
this.createVirtualTable();
this.getDatabase().execSQL("INSERT INTO " + SEARCHABLE_TABLE + " SELECT * FROM " + TABLE_NAME);
this.close();
}
public void openDatabase() throws SQLException
{
String sysDBPath = DB_PATH + DB_NAME;
// this is line 108 that is throwing the error:
this.myDB = SQLiteDatabase.openDatabase(sysDBPath, null, SQLiteDatabase.OPEN_READWRITE);
System.out.println("DBH openDatabase myDB is open = " + this.myDB.isOpen());
}
public SQLiteDatabase getDatabase()
{
try
{
this.createAndCopyDataBase();
} catch (IOException e)
{
e.printStackTrace();
}
this.openDatabase();
return this.myDB;
}
private void createVirtualTable()
{
try
{
this.getDatabase().execSQL("CREATE VIRTUAL TABLE ["+SEARCHABLE_TABLE+"] USING fts3 (" +
"[" +KEY_ID+"] TEXT," +
"[" +GAME_NAME+"] TEXT," +
"[" +PEOPLE+"] TEXT," +
"[" +VENUE+"] TEXT," +
"[" +DURATION +"] TEXT," +
"[" +EQUIPMENT +"] TEXT," +
"[" +SECTION +"] TEXT," +
"[" +FAVES+"] TEXT," +");"
);
System.out.println("virtual table created");
}
catch (Exception e)
{
e.printStackTrace();
this.deleteSearchableDBStructure(this.getDatabase());
}
}
private void deleteSearchableDBStructure(SQLiteDatabase database)
{
try
{
database.execSQL("DROP TABLE IF EXISTS ["+SEARCHABLE_TABLE+"];");
} catch (SQLException e)
{
e.printStackTrace();
}
}
public synchronized void close()
{
try
{
this.myDB.close();
super.close();
System.out.println("myDb is open = " + this.myDB.isOpen());
} catch (Exception e)
{
System.out.println("Error in DBHelper close()");
e.printStackTrace();
}
}
//Update the faves column of the db at row pageNumber
public boolean addFavourite(int pageNumber)
{
boolean addedOk = false;
ContentValues args = new ContentValues();
try
{
args.put(FAVES, "y");
this.openDatabase();
this.myDB.update(TABLE_NAME, args, KEY_ID + " = " + pageNumber , null);
addedOk = true;
} catch (SQLException e)
{
e.printStackTrace();
}
finally{
try
{
this.close();
}
catch (Exception e) {
e.printStackTrace();
}
}
return addedOk;
}
@Override
public void onCreate(SQLiteDatabase db)
{
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)
{
}
}