尝试获取关闭在Android的关闭SQLiteClosable的引用
问题描述:
嗨,我在android中创建数据库,我插入一些随机生成Integer到表中,并从表中获取匹配给定输入的行。但我得到attempt to acquire a reference on a close SQLiteClosable
。如果我使用没有where子句它是作品。唯一的问题是当我在查询中使用where子句时。尝试获取关闭在Android的关闭SQLiteClosable的引用
我的代码:
db = openOrCreateDatabase("TestData.db", SQLiteDatabase.CREATE_IF_NECESSARY, null);
db.setVersion(1);
db.setLocale(Locale.getDefault());
db.setLockingEnabled(true);
final String CREATE_TABLE_COUNTRIES ="CREATE TABLE IF NOT EXISTS tbl_countries (id INTEGER);";
db.execSQL(CREATE_TABLE_COUNTRIES);
ContentValues values = new ContentValues();
values.put("id", 1);
db.insert("tbl_countries", null, values);
Log.e("sql", "ok");
b1.setOnClickListener(new View.OnClickListener()
{
public void onClick(View view)
{
String p = et.getText().toString();
String [] columns=new String[]{"id"};
Cursor c=db.query("tbl_countries", columns, "id"+"=?",new String[]{p}, null, null, null);
c.moveToFirst();
c.close();
}
});
db.close();
我的日志猫信息
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): java.lang.IllegalStateException: attempt to acquire a reference on a close SQLiteClosable
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.database.sqlite.SQLiteClosable.acquireReference(SQLiteClosable.java:31)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:56)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:49)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:49)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1236)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.database.sqlite.SQLiteDatabase.queryWithFactory(SQLiteDatabase.java:1123)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1081)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1158)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at com.sql.where.main$1.onClick(main.java:63)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.view.View.performClick(View.java:2364)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.view.View.onTouchEvent(View.java:4179)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.widget.TextView.onTouchEvent(TextView.java:6591)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.view.View.dispatchTouchEvent(View.java:3709)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:883)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:883)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:883)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:883)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at com.android.internal.policy.impl.PhoneWindow$DecorView.superDispatchTouchEvent(PhoneWindow.java:1659)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at com.android.internal.policy.impl.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1107)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.app.Activity.dispatchTouchEvent(Activity.java:2061)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at com.android.internal.policy.impl.PhoneWindow$DecorView.dispatchTouchEvent(PhoneWindow.java:1643)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.view.ViewRoot.handleMessage(ViewRoot.java:1691)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.os.Handler.dispatchMessage(Handler.java:99)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.os.Looper.loop(Looper.java:123)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at android.app.ActivityThread.main(ActivityThread.java:4363)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at java.lang.reflect.Method.invokeNative(Native Method)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at java.lang.reflect.Method.invoke(Method.java:521)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
05-23 19:02:20.880: ERROR/AndroidRuntime(5533): at dalvik.system.NativeStart.main(Native Method)
答
在你onClick()
方法数据库已经关闭。你应该再次打开它或不关闭它,但第一个是可取的。
它是光标而不是数据库。我删除c.close();我仍然得到相同的错误 – 2011-05-23 14:15:03
我告诉你的onClick方法调用后,你调用db.close();当你点击按钮时会调用它。所以,你试图查询一个封闭的数据库。 – 2011-05-23 14:18:20