read文件未读取完成返回-1

在进行文件读取时，文件内数据未读取完成便返回-1结束。求解答(抱拳)
详细代码如下：

//获取二进制文件
    private byte[] readLocalFile(String path) throws IOException {
        File file = new File(path);
        InputStream inputStream = new FileInputStream(file);
        ByteArrayOutputStream out = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024 * 4];
        int n = 0;
        while ((n = inputStream.read(buffer)) != -1) {
            out.write(buffer, 0, n);
            Log.e("输出内容", "" + (inputStream.read(buffer)));
        }
        byte[] data = out.toByteArray();
        inputStream.close();
        return data;
    }

log日志如下：

2022-10-14 15:33:04.068 31219-31219/com.example.myapplication E/输出内容: 4096
2022-10-14 15:33:04.069 31219-31219/com.example.myapplication E/输出内容: 4096
2022-10-14 15:33:04.069 31219-31219/com.example.myapplication E/输出内容: -1

你log里怎么又执行read，不应该打印n吗
你这一次循环，两次read，能对才怪

你这打印是真牛逼