如何将android应用程序资产文件夹中的文本文件作为文本或pdf文件保存到android手机的本地目录？

Question

I have saved some text files in asset folder of android apk , whenever user opens the app which is having list of filenames ,if he clicks on a filename corresponding file opens from asset folder ,

Now I want to let user save that file in text or pdf format to his local directory so that he can transfer it or use it or modify it according to his choice

EDIT : I just want to know the api needed ,not the whole code

Answer 1

Use this function to copy something from assets to storage

 private void copyAssets() {
        AssetManager assetManager = getAssets();
        String[] files = null;
        try {
            files = assetManager.list("");
        } catch (IOException e) {
            Log.e("tag", "Failed to get asset file list.", e);
        }
        if (files != null) for (String filename : files) {
            InputStream in = null;
            OutputStream out = null;
            try {
              in = assetManager.open(filename);
              File outFile = new File(getExternalFilesDir(null), filename);
              out = new FileOutputStream(outFile);
              copyFile(in, out);
            } catch(IOException e) {
                Log.e("tag", "Failed to copy asset file: " + filename, e);
            }     
            finally {
                if (in != null) {
                    try {
                        in.close();
                    } catch (IOException e) {
                        // NOOP
                    }
                }
                if (out != null) {
                    try {
                        out.close();
                    } catch (IOException e) {
                        // NOOP
                    }
                }
            }  
        }
    }
    private 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);
        }
    }

Reference :Move file using Java