android - "Explicit termination method ' 关闭 ' not called"是什么意思？

Question

03-02 04:23:07.015: E/StrictMode(1096): A resource was acquired at attached stack trace but never released. See java.io.Closeable for information on avoiding resource leaks. 03-02 04:23:07.015: E/StrictMode(1096): java.lang.Throwable: Explicit termination method 'close' not called 03-02 04:23:07.015: E/StrictMode(1096): at dalvik.system.CloseGuard.open(CloseGuard.java:184) 03-02 04:23:07.015: E/StrictMode(1096): at android.database.sqlite.SQLiteDatabase.openInner(SQLiteDatabase.java:805) 03-02 04:23:07.015: E/StrictMode(1096): at android.database.sqlite.SQLiteDatabase.open(SQLiteDatabase.java:789) 03-02 04:23:07.015: E/StrictMode(1096): at android.database.sqlite.SQLiteDatabase.openDatabase(SQLiteDatabase.java:694) 03-02 04:23:07.015: E/StrictMode(1096): at android.app.ContextImpl.openOrCreateDatabase(ContextImpl.java:944) 03-02 04:23:07.015: E/StrictMode(1096): at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:224) 03-02 04:23:07.015: E/StrictMode(1096): at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:188) 03-02 04:23:07.015: E/StrictMode(1096): at com.helper.database.DBOperator.queryfeeds(DBOperator.java:53) 03-02 04:23:07.015: E/StrictMode(1096): at com.example.rssreader.MainActivitySpace.getfeeddata(MainActivitySpace.java:85) 03-02 04:23:07.015: E/StrictMode(1096): at com.example.rssreader.MainActivitySpace.onActivityCreated(MainActivitySpace.java:74) 03-02 04:23:07.015: E/StrictMode(1096): at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1508) 03-02 04:23:07.015: E/StrictMode(1096): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:947) 03-02 04:23:07.015: E/StrictMode(1096): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104) 03-02 04:23:07.015: E/StrictMode(1096): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682) 03-02 04:23:07.015: E/StrictMode(1096): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1467) 03-02 04:23:07.015: E/StrictMode(1096): at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:570) 03-02 04:23:07.015: E/StrictMode(1096): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1171) 03-02 04:23:07.015: E/StrictMode(1096): at android.app.Activity.performStart(Activity.java:5253) 03-02 04:23:07.015: E/StrictMode(1096): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2149) 03-02 04:23:07.015: E/StrictMode(1096): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2226) 03-02 04:23:07.015: E/StrictMode(1096): at android.app.ActivityThread.access$700(ActivityThread.java:135) 03-02 04:23:07.015: E/StrictMode(1096): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1397) 03-02 04:23:07.015: E/StrictMode(1096): at android.os.Handler.dispatchMessage(Handler.java:102) 03-02 04:23:07.015: E/StrictMode(1096): at android.os.Looper.loop(Looper.java:137) 03-02 04:23:07.015: E/StrictMode(1096): at android.app.ActivityThread.main(ActivityThread.java:4998) 03-02 04:23:07.015: E/StrictMode(1096): at java.lang.reflect.Method.invokeNative(Native Method) 03-02 04:23:07.015: E/StrictMode(1096): at java.lang.reflect.Method.invoke(Method.java:515) 03-02 04:23:07.015: E/StrictMode(1096): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:777) 03-02 04:23:07.015: E/StrictMode(1096): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:593) 03-02 04:23:07.015: E/StrictMode(1096): at dalvik.system.NativeStart.main(Native Method)

Answer 1

您需要在游标超出范围之前明确调用游标的关闭。如果您不这样做，游标的内容及其分配的资源将不会被释放，直到垃圾收集器决定实际删除它。由于游标需要大量资源，因此最好在不再使用时立即将其关闭。