Android在内部存储中创建目录+子目录(或子目录)

Question

我目前正在处理内部存储。

• 我有一些问题

我试图在内部存储中创建子目录，比如data/data/com.example.app/ parent文件夹/ sample.mp4

这里我的代码是

    ContextWrapper cw = new ContextWrapper(context);
    File parentpath = cw.getDir("parentfolder ",Context.MODE_PRIVATE);
    File childpath = new File(parentpath ,"childfolder");
    File childfolder = new File(childpath,"sample.mp4");
    FileOutputStream fos = new FileOutputStream(childfolder);

一些逻辑上的错误，它不能创建子文件夹，它反映了一些错误.

Answer 1

，最后我得到了答案

//Save Internal Storage

File myMainDir = context.getDir("MainFolder", Context.MODE_PRIVATE);

File mySubjectDir = new File(myMainDir, subFolder);
mySubjectDir.mkdir();

File myModuleDir = new File(mySubjectDir, semiSubFolder);
myModuleDir.mkdir();

File myFinalDir = new File(mySubjectDir, fileName);

//Save External Storage

String DNAME = "MainFolder"+"/"+subFolder+"/"+semiSubFolder;
File rootPath = new File(Environment.getExternalStorageDirectory().toString(), DNAME);
if(!rootPath.exists()) {
    rootPath.mkdirs();
}

if(!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
    Log.v("Cannot use storage","Cannot use storage");
}

File myFinalDir = new File(rootPath,TopicName);