我编写了一些用于删除数据库文件夹的代码。它删除数据库但也抛出错误。请建议我如何解决这个问题。
删除数据库代码
public void deleteDB() {
try {
File db_path = new File(
"/data/data/pacakge_name/databases/mydatabase_db.db");
db_path.delete();
System.out
.println("Database deleted successfully================================");
} catch (Exception e) {
// TODO: handle exception
Log.e("Error==", e.toString());
}
}
Cursor cursor = handler.getCategoryData("1");
if (cursor.moveToFirst()) {
System.out
.println("database has data................................");
} else {
System.out
.println("database has no data.............................");
LiveTVCategoryParser category_parser = new LiveTVCategoryParser();
category_parser.category_parser(Splash.this, "1",
"live_root");
}
错误:
android.database.sqlite.SQLiteDiskIOException: disk I/O error (code 1802)
E/AndroidRuntime( 613): at android.database.sqlite.SQLiteConnection.nativeExecuteForCursorWindow(Native Method)
E/AndroidRuntime( 613): at android.database.sqlite.SQLiteConnection.executeForCursorWindow(SQLiteConnection.java:838)
E/AndroidRuntime( 613): at android.database.sqlite.SQLiteSession.executeForCursorWindow(SQLiteSession.java:836)
E/AndroidRuntime( 613): at android.database.sqlite.SQLiteQuery.fillWindow(SQLiteQuery.java:62)
E/AndroidRuntime( 613): at android.database.sqlite.SQLiteCursor.fillWindow(SQLiteCursor.java:143)
E/AndroidRuntime( 613): at android.database.sqlite.SQLiteCursor.getCount(SQLiteCursor.java:133)
E/AndroidRuntime( 613): at android.database.AbstractCursor.moveToPosition(AbstractCursor.java:196)
E/AndroidRuntime( 613): at android.database.AbstractCursor.moveToFirst(AbstractCursor.java:236)
E/AndroidRuntime( 613): at com.zengamedia.ui.Splash$1.run(Splash.java:51)
E/AndroidRuntime( 613): at java.util.Timer$TimerImpl.run(Timer.java:284)
答案 0 :(得分:7)
在删除SQLite文件之前,您应该关闭游标和数据库。
答案 1 :(得分:0)
错误代码1802是SQLITE_IOERR_FSTAT。我宁愿假设磁盘级别出现问题,请尝试删除数据库并检查磁盘介质。
答案 2 :(得分:0)
在数据库的CRUD
时调用此函数public synchronized void checkDBIsOpen() {
try {
mydb = dbHelper.getWritableDatabase();
} catch (Exception e) {
e.printStackTrace();
NewsLog.error(TAG, "check database is open or not,excetpion:" + Utility2_1.getErrorInfo(e));
}
}