android APP源码预置文件并拷贝到应用files文件夹下

file123.bin文件预置进assets文件夹下

copyMcuFile("file123.bin", new File(getFilesDir()+ "/file123.bin")); private void copyMcuFile(String sourceFileName, File dest) throws IOException { InputStream in = null; OutputStream out = null; final int READ_BUFFER_SIZE = 4 * 1024 * 1024; try { in = getAssets().open(sourceFileName); out = new FileOutputStream(dest); byte[] buf = new byte[READ_BUFFER_SIZE]; int bytesRead; while ((bytesRead = in.read(buf)) > 0) { out.write(buf, 0, bytesRead); } Log.d(TAG,"copyFile finished"); } catch (Exception e) { Log.d(TAG,"copyFile Exception:"+e); } finally { if(in != null) { in.close(); } if(out != null) { out.close(); } } }