java android复制文件资产

Question

我有异步任务，必须将文件夹“文件”从资产写入SD卡上的文件夹。但没什么用。

final String sdDir = "/sdcard/izuchaika/";

new Thread(new Runnable() {
        public void run() {
            try {

                InputStream in = getAssets().open("Files");
                OutputStream out = new FileOutputStream(new File(sdDir));
                try {
                    byte[] bucket = new byte[32 * 1024];
                    int bytesRead = 0;
                    while (bytesRead != -1) {
                        bytesRead = in.read(bucket);
                        out.write(bucket, 0, bytesRead);
                    }
                } catch (IOException ex) {
                    ex.printStackTrace();
                } finally {
                    try {
                        if (in != null)
                            in.close();
                        if (out != null)
                            out.close();
                    } catch (IOException ex) {
                        ex.printStackTrace();
                    }

                }
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }


        }
    }).start();

Screen of folder tree

Answer 1

您正在编写和读取目录作为文件。

替换

InputStream in = getAssets().open("Files");
OutputStream out = new FileOutputStream(new File(sdDir));

与

InputStream in = getAssets().open("Files/exit.png");
OutputStream out = new FileOutputStream(new File(sdDir+"/exit.png"));