blocks|key|4597239|text|尝试添加|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4597240|FPath.mkdirs()；(参见http://developer.android.com/reference/java/io/File.html)|offset|length|4597241|然后根据需要将文件保存到该路径，Android操作系统将创建所需的所有目录。您不需要执行exists检查，只需设置该标志并保存即可。(另请参阅：How+to+create+directory+automatically+on+SD+card|4597242|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.android.com/reference/java/io/File.html|1|https://stackoverflow.com/questions/2130932/how-to-create-directory-automatically-on-sd-card^0|0|I|1K|0|0|20|1C|1|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@$D|T|E|U|1|V]]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@$D|X|E|Y|1|Z]]|A|$]]|$1|H|3|-4|5|6|7|10|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]|P|$5|K|L|M|A|$N|Q]]]]

Try adding

FPath.mkdirs();
(See <a href="http://developer.android.com/reference/java/io/File.html" rel="nofollow noreferrer">http://developer.android.com/reference/java/io/File.html</a>)

and then just save the file as needed to that path, Android OS will create all the directories needed.
You don't need to do the exists checks, just set that flag and save.
(Also see : <a href="https://stackoverflow.com/questions/2130932/how-to-create-directory-automatically-on-sd-card">How to create directory automatically on SD card</a>

blocks|key|4597264|text|mkdir和mkdirs之间的区别在于，mkdir不会创建不存在的父目录，而mkdirs会创建父目录，因此如果Shidhin不存在，mkdir将失败。此外，仅当创建了目录时，mkdir和mkdirs才返回true。如果该目录已经存在，则返回false|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4597265|entityMap^0|0|5|6|6|K|5|12|6|1J|7|1U|5|2F|5|2L|6|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]|$9|U|A|V|B|C]|$9|W|A|X|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|G|$]]

The difference between <code>mkdir</code> and <code>mkdirs</code> is that <code>mkdir</code> does not create nonexistent parent directory, while <code>mkdirs</code> does, so if <code>Shidhin</code> does not exist, <code>mkdir</code> will fail. Also, <code>mkdir</code> and <code>mkdirs</code> returns true only if the directory was created. If the directory already exists they return false

blocks|key|4597300|text|如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4597301|String+folder_main+=+"NewFolder";

File+f+=+new+File(Environment.getExternalStorageDirectory(),+folder_main);
if+(!f.exists())+{
++++f.mkdirs();
}|code-block|syntax|javascript|4597302|如果您想在其中创建另一个文件夹：|4597303|File+f1+=+new+File(Environment.getExternalStorageDirectory()+%2B+"/"+%2B+folder_main,+"product1");
if+(!f1.exists())+{
++++f1.mkdirs();
}|4597304|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Do it like this : 

<pre><code>String folder_main = "NewFolder";

File f = new File(Environment.getExternalStorageDirectory(), folder_main);
if (!f.exists()) {
 f.mkdirs();
}
</code></pre>

If you wanna create another folder into that :

<pre><code>File f1 = new File(Environment.getExternalStorageDirectory() + "/" + folder_main, "product1");
if (!f1.exists()) {
 f1.mkdirs();
}
</code></pre>

blocks|key|91138|text|我们可以在外部存储上创建文件夹或目录，如下所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|91139|+String+myfolder=Environment.getExternalStorageDirectory()%2B"/"%2Bfname;
+++++File+f=new+File(myfolder);
+++++if(!f.exists())
+++++if(!f.mkdir()){
+++++Toast.makeText(this,+myfolder%2B"+can't+be+created.",+Toast.LENGTH_SHORT).show();

++++}
++++else
+++++Toast.makeText(this,+myfolder%2B"+can+be+created.",+Toast.LENGTH_SHORT).show();
}|code-block|syntax|javascript|91140|如果我们想要在内部存储器上创建目录或文件夹，那么我们将这样做：|91141|File+folder+=+getFilesDir();+
File+f=+new+File(folder,+"doc_download");+
f.mkdir();|91142|但请确保您已授予写入外部存储的权限。请记住，如果您没有外部驱动器，那么默认情况下，它会选择内部父目录。我确信它会工作在.....enjoy代码中|91143|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

we can Create Folder or Directory on External storage as :

<pre><code> String myfolder=Environment.getExternalStorageDirectory()+"/"+fname;
 File f=new File(myfolder);
 if(!f.exists())
 if(!f.mkdir()){
 Toast.makeText(this, myfolder+" can't be created.", Toast.LENGTH_SHORT).show();

 }
 else
 Toast.makeText(this, myfolder+" can be created.", Toast.LENGTH_SHORT).show();
}
</code></pre>

and if we want to create Directory or folder on Internal Memory then we will do :

<pre><code>File folder = getFilesDir(); 
File f= new File(folder, "doc_download"); 
f.mkdir();
</code></pre>

But make Sure you have given Write External Storage Permission.
And Remember that if you have no external drive then it choose by default to internal parent directory.
I'm Sure it will work .....enjoy code

blocks|key|4597363|text|尝试{|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4597364|String文件名=+"SampleFile.txt"；String文件路径=+"MyFileStorage"；|4597365|++++++++++++++++FileInputStream+fis+=+new+FileInputStream(myExternalFile);
++++++++++++++++DataInputStream+in+=+new+DataInputStream(fis);
++++++++++++++++BufferedReader+br+=
++++++++++++++++++++++++new+BufferedReader(new+InputStreamReader(in));
++++++++++++++++String+strLine;
++++++++++++++++while+((strLine+=+br.readLine())+!=+null)+{
++++++++++++++++++++myData+=+myData+%2B+strLine;
++++++++++++++++}
++++++++++++++++in.close();
++++++++++++}+catch+(IOException+e)+{
++++++++++++++++e.printStackTrace();
++++++++++++}
++++++++++inputText.setText(myData);
++++++++++++response.setText("SampleFile.txt+data+retrieved+from+External+Storage...");
++++++++}
++++});

++++if+(!isExternalStorageAvailable()+%7C%7C+isExternalStorageReadOnly())+{
++++++++saveButton.setEnabled(false);
++++}
++++else+{
++++++++myExternalFile+=+new+File(getExternalFilesDir(filepath),+filename);
++++}|code-block|syntax|javascript|4597366|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

try {

String filename = "SampleFile.txt";
 String filepath = "MyFileStorage";

<pre><code> FileInputStream fis = new FileInputStream(myExternalFile);
 DataInputStream in = new DataInputStream(fis);
 BufferedReader br =
 new BufferedReader(new InputStreamReader(in));
 String strLine;
 while ((strLine = br.readLine()) != null) {
 myData = myData + strLine;
 }
 in.close();
 } catch (IOException e) {
 e.printStackTrace();
 }
 inputText.setText(myData);
 response.setText("SampleFile.txt data retrieved from External Storage...");
 }
 });

 if (!isExternalStorageAvailable() || isExternalStorageReadOnly()) {
 saveButton.setEnabled(false);
 }
 else {
 myExternalFile = new File(getExternalFilesDir(filepath), filename);
 }
</code></pre>

blocks|key|91192|text|现在不建议使用Environment.getExternalStorageDirectory()，因为API级别29，该选项使用：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|91193|Context.getExternalFilesDir()。|91194|示例：|91195|void+createExternalStoragePrivateFile()+{
++++//+Create+a+path+where+we+will+place+our+private+file+on+external
++++//+storage.
++++File+file+=+new+File(getExternalFilesDir(null),+"DemoFile.jpg");

++++try+{
++++++++//+Very+simple+code+to+copy+a+picture+from+the+application's
++++++++//+resource+into+the+external+file.++Note+that+this+code+does
++++++++//+no+error+checking,+and+assumes+the+picture+is+small+(does+not
++++++++//+try+to+copy+it+in+chunks).++Note+that+if+external+storage+is
++++++++//+not+currently+mounted+this+will+silently+fail.
++++++++InputStream+is+=+getResources().openRawResource(R.drawable.balloons);
++++++++OutputStream+os+=+new+FileOutputStream(file);
++++++++byte[]+data+=+new+byte[is.available()];
++++++++is.read(data);
++++++++os.write(data);
++++++++is.close();
++++++++os.close();
++++}+catch+(IOException+e)+{
++++++++//+Unable+to+create+file,+likely+because+external+storage+is
++++++++//+not+currently+mounted.
++++++++Log.w("ExternalStorage",+"Error+writing+"+%2B+file,+e);
++++}
}

void+deleteExternalStoragePrivateFile()+{
++++//+Get+path+for+the+file+on+external+storage.++If+external
++++//+storage+is+not+currently+mounted+this+will+fail.
++++File+file+=+new+File(getExternalFilesDir(null),+"DemoFile.jpg");
++++file.delete();
}

boolean+hasExternalStoragePrivateFile()+{
++++//+Get+path+for+the+file+on+external+storage.++If+external
++++//+storage+is+not+currently+mounted+this+will+fail.
++++File+file+=+new+File(getExternalFilesDir(null),+"DemoFile.jpg");
++++return+file.exists();
}|code-block|syntax|javascript|91196|entityMap|0|LINK|mutability|MUTABLE|url|https://developer.android.com/reference/android/os/Environment|1|https://developer.android.com/reference/android/content/Context#getExternalFilesDir(java.lang.String))^0|7|15|0|0|0|T|1|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@$A|11|B|12|1|13]]|C|$]]|$1|F|3|G|5|6|7|14|8|@]|9|@]|C|$]]|$1|H|3|I|5|J|7|15|8|@]|9|@]|C|$K|L]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]|U|$5|P|Q|R|C|$S|V]]]]

The use of <a href="https://developer.android.com/reference/android/os/Environment" rel="noreferrer">Environment.getExternalStorageDirectory()</a> now is deprecated since API level 29, the option is using:

<a href="https://developer.android.com/reference/android/content/Context#getExternalFilesDir(java.lang.String)" rel="noreferrer">Context.getExternalFilesDir()</a>.

Example:

<pre><code>void createExternalStoragePrivateFile() {
 // Create a path where we will place our private file on external
 // storage.
 File file = new File(getExternalFilesDir(null), "DemoFile.jpg");

 try {
 // Very simple code to copy a picture from the application's
 // resource into the external file. Note that this code does
 // no error checking, and assumes the picture is small (does not
 // try to copy it in chunks). Note that if external storage is
 // not currently mounted this will silently fail.
 InputStream is = getResources().openRawResource(R.drawable.balloons);
 OutputStream os = new FileOutputStream(file);
 byte[] data = new byte[is.available()];
 is.read(data);
 os.write(data);
 is.close();
 os.close();
 } catch (IOException e) {
 // Unable to create file, likely because external storage is
 // not currently mounted.
 Log.w("ExternalStorage", "Error writing " + file, e);
 }
}

void deleteExternalStoragePrivateFile() {
 // Get path for the file on external storage. If external
 // storage is not currently mounted this will fail.
 File file = new File(getExternalFilesDir(null), "DemoFile.jpg");
 file.delete();
}

boolean hasExternalStoragePrivateFile() {
 // Get path for the file on external storage. If external
 // storage is not currently mounted this will fail.
 File file = new File(getExternalFilesDir(null), "DemoFile.jpg");
 return file.exists();
}
</code></pre>

blocks|key|91213|text|这是原始的，但应该足以让您转到//创建位于Data/comexampl中的外部文件夹comexampl应用程序文件|type|unstyled|depth|inlineStyleRanges|entityRanges|data|91214|++++File+folder+=+getExternalFilesDir("yourfolder");

++++++++//create+folder+Internal

+++
++++++++File+file+=+new+File(Environment.getExternalStorageDirectory().getPath(+)+%2B+"/RICKYH");


++++if+(!file.exists())+{
++++++++file.mkdirs();

++++++++Toast.makeText(MainActivity.this,+"Make+Dir",+Toast.LENGTH_SHORT).show();


++++}|code-block|syntax|javascript|91215|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This is raw but should be enough to get you going
// create folder external located in Data/comexampl your app file
<pre><code> File folder = getExternalFilesDir(&quot;yourfolder&quot;);

 //create folder Internal

 
 File file = new File(Environment.getExternalStorageDirectory().getPath( ) + &quot;/RICKYH&quot;);


 if (!file.exists()) {
 file.mkdirs();

 Toast.makeText(MainActivity.this, &quot;Make Dir&quot;, Toast.LENGTH_SHORT).show();


 }
</code></pre>

blocks|key|91249|text|我还发现了另一件事:我最近遇到了同样的问题，我尝试了下面的解决方案，但它们都不起作用……我这样做是为了解决我的问题:我将此权限添加到我的项目清单文件中：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|91250|​|91251|<uses-permission+android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/>|code-block|syntax|javascript|91252|91253|(加上读写权限)，我的应用程序工作正常。|91254|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$G|H]]|$1|I|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|R|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|M|$]]

I found some another thing too :
I had the same problem recently, and i tryed abow solutions and they did not work...
i did this to solve my problem :
I added this permission to my project manifests file :
<div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
<div class="snippet-code">
<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"/&gt;</code></pre>
</div>
</div>

(plus READ and WRITE permissions) and my app just worked correctly.

I cannot create a folder in android External Storage Directory.

I have added permissing on manifest,

<pre><code>&lt;uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /&gt;
</code></pre>

Here is my code:

<pre><code> String Path = Environment.getExternalStorageDirectory().getPath().toString()+ "/Shidhin/ShidhiImages";
 System.out.println("Path : " +Path );
 File FPath = new File(Path);
 if (!FPath.exists()) {
 if (!FPath.mkdir()) {
 System.out.println("***Problem creating Image folder " +Path );
 }
 }
</code></pre>

how to create a folder in android External Storage Directory?

Android

我无法在android外部存储目录中创建文件夹。我在载货单上加上了遗漏，<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />下面是我的代码： String Path = Environment.getExternalSt...

问如何在android外部存储目录中创建文件夹？
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