有没有办法替换库类？

Question

Lets say that a lot of functionality are using methods from this class test.MyClass , but it's very slow and I'd like to code in JNI in hopes of improving the timing...

Is there a way to replace test.MyClass so that the library does not need to be changed, but the codes in the library will use the new test.MyClass with native implementations for certain methods from now on? It's the classic "PC is fine but the timing for Android is crap" problem.

Answer 1

Just create your test.MyClass in the same package/hierarchical structure as the one in the package you want to override. The classloader should load your implementation first and if it tries to load the one from other library the load will fail, because there can be only one loaded instance in the classpath.