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8,243 Points'Database is locked'
When I ran my app after creating my database, I got this error:
04-10 11:39:22.783 2233-2233/com.example.x.x E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.example.x.x, PID: 2233
android.database.sqlite.SQLiteDatabaseLockedException: database is locked (code 5): , while compiling: PRAGMA journal_mode
at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:893)
at android.database.sqlite.SQLiteConnection.executeForString(SQLiteConnection.java:638)
at android.database.sqlite.SQLiteConnection.setJournalMode(SQLiteConnection.java:319)
at android.database.sqlite.SQLiteConnection.setWalModeFromConfiguration(SQLiteConnection.java:293)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:214)
at android.database.sqlite.SQLiteConnection.open(SQLiteConnection.java:192)
at android.database.sqlite.SQLiteConnectionPool.openConnectionLocked(SQLiteConnectionPool.java:464)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:186)
at android.database.sqlite.SQLiteConnectionPool.open(SQLiteConnectionPool.java:178)
at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:916)
at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:893)
at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:796)
at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:571)
at android.content.ContextWrapper.openOrCreateDatabase(ContextWrapper.java:269)
at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:223)
at android.database.sqlite.SQLiteOpenHelper.getWritableDatabase(SQLiteOpenHelper.java:163)
at com.example.diego.easylist.EasyListDataSource.open(EasyListDataSource.java:25)
at com.example.diego.easylist.EasyListDataSource.create(EasyListDataSource.java:75)
at com.example.diego.easylist.Activitys.ListsActivity.saveList(ListsActivity.java:271)
at com.example.diego.easylist.Activitys.ListsActivity.createListClickListener(ListsActivity.java:197)
at com.example.diego.easylist.Fragments.NewListDialogFragment$1.onClick(NewListDialogFragment.java:92)
at android.view.View.performClick(View.java:5217)
at android.view.View$PerformClick.run(View.java:21349)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5585)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:730)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620)
I'm not sure what the problem here is. Here is my code: EasyListDataSource.java25:
private SQLiteDatabase open() {
return mEasyListSQLiteHelper.getWritableDatabase();
}
EasyListDataSource.java75
public void create(ListItem item) {
SQLiteDatabase database = open();
database.beginTransaction();
ContentValues contentValues = new ContentValues();
contentValues.put(EasyListSQLiteHelper.LISTS_NAME, item.getListName());
contentValues.put(EasyListSQLiteHelper.LISTS_CHECKED, item.getImportant());
database.insert(EasyListSQLiteHelper.LISTS_TABLE, null, contentValues);
database.setTransactionSuccessful();
database.close();
close(database);
}
ListsActivity.java271:
private void saveList() {
EasyListDataSource easyListDataSource = new EasyListDataSource(this);
easyListDataSource.create(mListItem);
}
ListsActivity.java197:
@Override
public void createListClickListener(View v, String string) {
mListItem = new ListItem();
mListItem.setListName(string);
mListList.add(mListItem);
mRecyclerViewLists.scrollToPosition(mListList.size() - 1);
mAdapter.notifyDataSetChanged();
saveList();
Toast.makeText(ListsActivity.this, "\"" + mListItem.getListName() + "\"" + " has been created.", Toast.LENGTH_SHORT).show();
}
NewListDialogFragment.java92:
// OnClickListeners...
mAcceptListTextView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
String item = mListEditText.getText().toString();
if (item.equals("") || item.startsWith(" ")) {
String message = "Please fill in the empty field.";
Toast.makeText(context, message, Toast.LENGTH_SHORT).show();
} else {
mCreateListClickListener.createListClickListener(view, item);
dialog.dismiss();
}
}
});
1 Answer
Ben Jakuben
Treehouse TeacherHave you tried googling the error message, specifically this most important part: "SQLiteDatabaseLockedException: database is locked"? This error usually means that something else in your app has an open connection to the DB, preventing dual access. There are some helpful suggestions on StackOverflow to try to debug further.