android - SO Android 库的运行时目录在哪里？

Question

我有一个使用外部.so库工作的 Android 应用程序（OpenALPR）。

该.so库还需要一个外部 conf 文件才能正常工作。当我加载我的库并初始化它时，我需要在本机函数中指定 conf 文件到库的路径。

private native void initialize(String country, String configFile, String runtimeDir);

这是我的项目的结构：

我应该给哪条路？我找不到将文件放在哪里以便我的库可以看到它们

标签： androidruntimeshared-libraries

Answer 1

诀窍是手动将 Assets 的内容移动到/data/data/com.example.app/存储库的实际文件夹中。

这是一个实现这一点的片段（来自官方的android repo）

 /**
     * Copies the assets folder.
     *
     * @param assetManager The assets manager.
     * @param fromAssetPath The from assets path.
     * @param toPath The to assets path.
     *
     * @return A boolean indicating if the process went as expected.
     */
    public static boolean copyAssetFolder(AssetManager assetManager, String fromAssetPath, String toPath) {
        try {
            String[] files = assetManager.list(fromAssetPath);

            new File(toPath).mkdirs();

            boolean res = true;

            for (String file : files)

                if (file.contains(".")) {
                    res &= copyAsset(assetManager, fromAssetPath + "/" + file, toPath + "/" + file);
                } else {
                    res &= copyAssetFolder(assetManager, fromAssetPath + "/" + file, toPath + "/" + file);
                }

            return res;
        } catch (Exception e) {
            e.printStackTrace();

            return false;
        }
    }

    /**
     * Copies an asset to the application folder.
     *
     * @param assetManager The asset manager.
     * @param fromAssetPath The from assets path.
     * @param toPath The to assests path.
     *
     * @return A boolean indicating if the process went as expected.
     */
    private static boolean copyAsset(AssetManager assetManager, String fromAssetPath, String toPath) {
        InputStream in = null;
        OutputStream out = null;

        try {
            in = assetManager.open(fromAssetPath);

            new File(toPath).createNewFile();

            out = new FileOutputStream(toPath);

            copyFile(in, out);
            in.close();

            in = null;

            out.flush();
            out.close();

            out = null;

            return true;
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

    /**
     * Copies a file.
     *
     * @param in The input stream.
     * @param out The output stream.
     *
     * @throws IOException
     */
    private static void copyFile(InputStream in, OutputStream out) throws IOException {
        byte[] buffer = new byte[1024];

        int read;

        while ((read = in.read(buffer)) != -1) {
            out.write(buffer, 0, read);
        }
    }