保存文件的Android FileOutputStream

Question

这里我如何将字节写入文件。我正在使用FileOutputStream

    private final Handler handler = new Handler(){
            @Override
            public void handleMessage(Message msg) {
                FragmentActivity activity = getActivity();
                        byte[] readBuffer = (byte[]) msg.obj;
                        FileOutputStream out = null;
                        try {
                            out = new FileOutputStream("myFile.xml");
                            out.write(readBuffer);
                            out.close();
                        } catch (FileNotFoundException e) {
                            e.printStackTrace();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
           }
}

现在我想打开那个文件，所以我需要有那个文件的路径。那么我需要如何打开该文件？

编辑：

在这里我如何从文件中读取，但我什么也看不到......

BufferedReader reader = null;
                    FileInputStream s = null;
                    try {
                        s = new FileInputStream("mano.xml");
                        reader = new BufferedReader(new InputStreamReader(s));

                        String line = reader.readLine();
                        Log.d(getTag(), line);
                        while (line != null) {
                            Log.d(getTag(), line);
                            line = reader.readLine();
                        }
                    } catch (FileNotFoundException e) {
                        e.printStackTrace();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }

Answer 1

我建议用它来写作：

OutputStream out = new FileOutputStream(Environment.getExternalStorageDirectory().getAbsolutePath()+"/yourfilename");

因此要读取位置：

File file = new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/"+transaction.getUniqueId()+".pdf");

读取路径：

file.getAbsolutePath();