JAVA语言 - Android拷贝assets文件

public static boolean copyFileIfNeed(Context context, String srcFilePath, String desFilePath) {
    Log.d(TAG, "copyFileIfNeed(): srcFilePath= " + srcFilePath + " , desFilePath= " + desFilePath);

    File desFile = new File(desFilePath);
    try {
        if (desFile.exists()) {
            desFile.delete();
        }

        desFile.createNewFile();
        InputStream in = context.getApplicationContext().getAssets().open(srcFilePath);
        if (in == null) {
            Log.e(TAG, "copyFileIfNeed(): the src is NOT existed, FILE= " + srcFilePath);

            return false;
        }

        OutputStream out = new FileOutputStream(desFile);
        byte[] buffer = new byte[4096];
        int n;
        int sum = 0;
        while ((n = in.read(buffer)) > 0) {
            sum += n;
            Log.d(TAG, "copyFileIfNeed(): copy SIZE= " + sum + " B");
            out.write(buffer, 0, n);
            out.flush();
        }

        in.close();
        in = null;
        out.close();
        out = null;
    } catch (IOException e) {
        Log.e(TAG, "copyFileIfNeed(): " + e);
        desFile.delete();

        return false;
    }

    return true;
}