打开失败：ENOENT（没有此类文件或目录）错误将文件从Asset复制到SdCard

Question

我将文件从eclipse中的Asset文件夹复制到Sdcard Genymotion虚拟设备，但是我收到了错误： java.io.FileNotFoundException：/storage/emulated/0/tesseract/tessdata/eng.traineddata：open failed：ENOENT（没有这样的文件或目录）。

请帮帮我 P / s：我在Manifest文件中添加了WRITE_EXTERNAL_STORAGE。 这是我的代码

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Answer 1

使用此

AssetManager assetManager = getActivity().getAssets();
    File file = new File(Environment.getExternalStorageDirectory()
            + "/tesseract/tessdata", lang + ".traineddata");
    if (!(file.exists())) {
        try {
            InputStream in = assetManager.open("tessdata/" + lang
                    + ".traineddata");
            String sdCardPath = Environment.getExternalStorageDirectory()
                    + "/tesseract/tessdata";
            new File(sdCardPath).mkdirs();
            File outFile = new File(sdCardPath + "/", lang + ".traineddata");
            OutputStream out = new FileOutputStream(outFile);
            copyFile(in, out);
            in.close();
            in = null;
            out.flush();
            out.close();
            out = null;
        } catch (IOException e) {
            Log.e("tag", "Failed to copy asset file: " + lang
                    + ".traineddata", e);
        }
    }