Question

我的应用程序抛出错误：

11-08 17:19:40.800: E/AndroidRuntime(18592): java.lang.RuntimeException: Unable to resume activity {app.piotrek.learning/app.piotrek.learning.AddNewQuestion}: java.lang.IllegalStateException: trying to requery an already closed cursor  android.database.sqlite.SQLiteCursor@40f7f8a8
11-08 17:19:40.800: E/AndroidRuntime(18592):    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2567)
11-08 17:19:40.800: E/AndroidRuntime(18592):    at android.app.ActivityThread.handleResumeActivity(ActivityThread.java:2595)
11-08 17:19:40.800: E/AndroidRuntime(18592):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1183)
11-08 17:19:40.800: E/AndroidRuntime(18592):    at android.os.Handler.dispatchMessage(Handler.java:99)
11-08 17:19:40.800: E/AndroidRuntime(18592):    at android.os.Looper.loop(Looper.java:137)
11-08 17:19:40.800: E/AndroidRuntime(18592):    at android.app.ActivityThread.main(ActivityThread.java:4575)
11-08 17:19:40.800: E/AndroidRuntime(18592):    at java.lang.reflect.Method.invokeNative(Native Method)
11-08 17:19:40.800: E/AndroidRuntime(18592):    at java.lang.reflect.Method.invoke(Method.java:511)
11-08 17:19:40.800: E/AndroidRuntime(18592):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789)
11-08 17:19:40.800: E/AndroidRuntime(18592):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556)
11-08 17:19:40.800: E/AndroidRuntime(18592):    at dalvik.system.NativeStart.main(Native Method)
11-08 17:19:40.800: E/AndroidRuntime(18592): Caused by: java.lang.IllegalStateException: trying to requery an already closed cursor  android.database.sqlite.SQLiteCursor@40f7f8a8
11-08 17:19:40.800: E/AndroidRuntime(18592):    at android.app.Activity.performRestart(Activity.java:4508)
11-08 17:19:40.800: E/AndroidRuntime(18592):    at android.app.Activity.performResume(Activity.java:4531)
11-08 17:19:40.800: E/AndroidRuntime(18592):    at android.app.ActivityThread.performResumeActivity(ActivityThread.java:2557)
11-08 17:19:40.800: E/AndroidRuntime(18592):    ... 10 more

当我去另一个活动并点击“后退按钮”时，似乎出现错误。我已经发现问题就在这里：

@Override
protected void onResume(){
    super.onResume();

    db = new Database(getApplicationContext());

    db.open();

    fillSpinner(db.getAllEntriesSubjects(), spinnerSubject, DatabaseData.KEY_NAME);
    //long data = spinnerSubject.getSelectedItemId();
    //Log.v("ADDNEWQUESTION", "Wybrano: " + data);
    //fillSpinner(db.getAllEntriesTitles(), spinnerTitles);
    db.close();
}

public void fillSpinner(Cursor cs, Spinner spinner, String dane){
    startManagingCursor(cs);

    SimpleCursorAdapter mAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_spinner_item, cs, new String[] {dane}, new int[] {android.R.id.text1});
    mAdapter.setDropDownViewResource(android.R.layout.simple_spinner_item);
    spinner.setAdapter(mAdapter);
}

AFAIK，我没有关闭任何光标。那怎么了？

Answer 1

从db.close();方法中删除onResume并将其添加到onPause()方法。希望它有所帮助。

Answer 2

试试这个..

public void onBackPressed（）{

    Intent i = new Intent(getApplicationContext(), AddNewQuestion.class);
    startActivity(i);
    finish();
    super.onStop();

}

试图重新查询已经关闭的游标 - 出了什么问题？

2 个答案: