copy file from Android assets folder (由Android的assets資料夾拷貝檔案)

private void copyFile(String source, String destination) {
        InputStream srcStream;
        FileOutputStream desStream;
        try {
            srcStream = this.getResources().getAssets().open(source);
            desStream = new FileOutputStream(new File(destination));
            byte [] data= new byte [1024];
            while (srcStream.read(data) != -1) {
                desStream.write(data);
            }
            srcStream.close();
            desStream.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } 

add below expression in the AndroidManiFest.xml for getting access permission. 把這行加到AndroidManiFest.xml才有寫入權限

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />