close() was never explicitly called on database '/data/data/com.seehope.view/databases/note.db' 异常

本文探讨了在Android开发过程中遇到的数据库异常问题及其原因,包括数据库未正确关闭、cursor使用不当、重复创建数据库对象等,并提供了相应的解决方法。

android开发时出现异常close() was never explicitly called on database '/data/data/com.seehope.view/databases/note.db' :


原因有:

1)数据库用完后没有关闭。

2)cursor(游标)使用完后没有关闭。

3)重复的创建了数据库类对象,即new 了多个DBHelper,使得数据库重建。


解决方法:查看代码,看在什么地方重复new 了数据库辅助类的对象。

   在activity中覆盖onDestory()方法,在该方法中关闭数据库。



### GLVND EGL Vendor Configuration in `/usr/share/glvnd/egl_vendor.d` Compatibility and Setup Issues The configuration files within the directory `/usr/share/glvnd/egl_vendor.d` are crucial for managing multiple GPU drivers on a single system, ensuring that applications can correctly select which driver to use based on their requirements. These configurations help resolve conflicts between different OpenGL implementations provided by various vendors such as NVIDIA or Mesa. For systems using NVIDIA GPUs with specific versions of CUDA like 9.0 mentioned previously[^3], it is important to ensure proper setup of these directories so that both the correct version of the NVIDIA driver and compatible libraries (such as those from Anaconda environments) work seamlessly together without causing any compatibility issues. When dealing with potential problems related to this path: - Ensure all necessary environment variables (`LD_LIBRARY_PATH`, `PATH`) point to appropriate locations where required library files reside. For instance, if working inside an Anaconda virtual environment named `nerf39-201`, one should verify whether paths similar to `/home/gpu/anaconda3/envs/nerf39-201/lib` appear in `$LD_LIBRARY_PATH`. This ensures access to expected versions of shared objects including libstdc++ matching desired ABI levels indicated through commands like `strings ...libstdc++.so.6 | grep GLIBCXX_[version]`. - Verify symbolic links under `/etc/alternatives` pointing towards intended binaries/drivers rather than alternatives installed via package managers unless explicitly preferred otherwise. - Confirm presence and correctness of `.json` files inside `/usr/share/glvnd/egl_vendor.d`; they define how each vendor's implementation interacts during runtime initialization processes involving EGL interfaces. To check current settings effectively: ```bash ls -l /usr/share/glvnd/egl_vendor.d/ cat /usr/share/glvnd/egl_vendor.d/*.json ``` Additionally, inspecting logs generated while running affected programs might provide clues regarding mismatches encountered at load time due to improper linkage against mismatched symbol tables across diverse software stacks involved here.
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