java - android 怎么复制assets文件夹到本地SD卡？

问题描述

问 题

需要复制Assert的文件夹到本地SD卡，有40M的大小，请问怎么做呀？？

解决方案

谢谢大家！已解决
//复制assets大文件到本地SD卡

public static void CopyAssets(Context context, String assetDir, String dir) {
    String[] files;
    try {
        files = context.getResources().getAssets().list(assetDir);
    } catch (IOException e1) {
        return;
    }
    File mWorkingPath = new File(dir);
    // if this directory does not exists, make one.
    if (!mWorkingPath.exists()) {
        if (!mWorkingPath.mkdirs()) {

        }
    }

    for (int i = 0; i < files.length; i++) {
        try {
            String fileName = files[i];
            // we make sure file name not contains '.' to be a folder.
            if (!fileName.contains(".")) {
                if (0 == assetDir.length()) {
                    CopyAssets(context, fileName, dir + fileName + "/");
                } else {
                    CopyAssets(context, assetDir + "/" + fileName, dir+ fileName + "/");
                }
                continue;
            }
            File outFile = new File(mWorkingPath, fileName);
            if (outFile.exists())
                outFile.delete();
            InputStream in = null;
            if (0 != assetDir.length())
                in = context.getAssets().open(assetDir + "/" + fileName);
            else
                in = context.getAssets().open(fileName);
            OutputStream out = new FileOutputStream(outFile);

            // Transfer bytes from in to out
            byte[] buf = new byte[1024];
            int len;
            while ((len = in.read(buf)) > 0) {
                out.write(buf, 0, len);
            }

            in.close();
            out.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

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