java.lang.UnsatisfiedLinkError 的解决办法

private void loadLibraryInternal(final Context context,
                                     final String library,
                                     final String version) {
        if (loadedLibraries.contains(library) && !force) {
            log("%s already loaded previously!", library);
            return;
        }

        try {
            libraryLoader.loadLibrary(library);
            loadedLibraries.add(library);
            //正常情况下加载so成功后不再做任何处理
            log("%s (%s) was loaded normally!", library, version);
            return;
        } catch (final UnsatisfiedLinkError e) {
            // :-(
            log("Loading the library normally failed: %s", Log.getStackTraceString(e));
        }

        //加载不成功的情况
        log("%s (%s) was not loaded normally, re-linking...", library, version);

        //首先尝试从 /data/data/packagename/app-lib/下加载so
        //这个目录下存放的是ReLinker从apk里面copy出来的so文件

        final File workaroundFile = getWorkaroundLibFile(context, library, version);
        if (!workaroundFile.exists() || force) {
            if (force) {
                log("Forcing a re-link of %s (%s)...", library, version);
            }

            //如果没有或者需要更新so文件，先清理旧文件

            cleanupOldLibFiles(context, library, version);

            //从apk中copy so文件到app-lib/目录下

            libraryInstaller.installLibrary(context, libraryLoader.supportedAbis(),
                    libraryLoader.mapLibraryName(library), workaroundFile, this);
        }

        try {
        	//支持加载so的依赖
            if (recursive) {
                final ElfParser parser = new ElfParser(workaroundFile);
                final List<String> dependencies = parser.parseNeededDependencies();
                for (final String dependency : dependencies) {
                    loadLibrary(context, libraryLoader.unmapLibraryName(dependency));
                }
            }
        } catch (IOException ignored) {
            // This a redundant step of the process, if our library resolving fails, it will likely
            // be picked up by the system's resolver, if not, an exception will be thrown by the
            // next statement, so its better to try twice.
        }

        //最后加载app-lib/下的so文件
        libraryLoader.loadPath(workaroundFile.getAbsolutePath());
        loadedLibraries.add(library);
        log("%s (%s) was re-linked!", library, version);
    }