在 Android 中保存文件：java.io.FileNotFoundException。打开失败：ENOENT（没有那个文件或目录）
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Save file in Android: java.io.FileNotFoundException. open failed: ENOENT (No such file or directory)
提问by Dzmitry
I've a next problem... I searched answer on the source, but didn't find a good answer...
我有一个下一个问题......我在来源上搜索了答案，但没有找到一个好的答案......
java.io.FileNotFoundException: /mounted/EmailClient/side-corner.png: open failed: ENOENT (No such file or directory)
at libcore.io.IoBridge.open(IoBridge.java:453)
at java.io.FileOutputStream.<init>(FileOutputStream.
at java.io.FileOutputStream.<init>(FileOutputStream.java:73) etc
Code:
代码：
private static String saveFile(String filename, InputStream input) {
String path = Environment.getExternalStorageState();
if (Environment.MEDIA_MOUNTED.equals(path)) {
try {
byte[] attachment = new byte[input.available()];
input.read(attachment);
File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/EmailClient/", filename);
if (!file.mkdirs())
Log.d("EmailClient", "saveFile: Dir not created");
FileOutputStream out = new FileOutputStream(file); //PROBLEM!
out.write(attachment);
input.close();
out.close();
return path;
} catch (IOException e) {
Log.e("EmailClient", "saveFile: File not saved", e);;
}
}
return path;
}
回答by LearnPainLess
use this code
使用此代码
File folder = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/EmailClient/");
folder.mkdirs();
File file = new File(folder,filename);
file.createNewFile();
回答by Kona Suresh
I think you are trying to save the file in the "DIRECTORY_DOWNLOADS" directory,. So you should follow the below code. The below line gives the directory.
我认为您正在尝试将文件保存在“DIRECTORY_DOWNLOADS”目录中。所以你应该遵循下面的代码。下面一行给出了目录。
path = Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOWNLOADS);
If You want to create specific folder "Email_Client" inside that path, write this line.
如果您想在该路径中创建特定文件夹“Email_Client”，请写下这一行。
File folder = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOWNLOADS)+"/Email_Client/");
And you should declare the permission "WRITE_EXTERNAL_STORAGE"
你应该声明权限“WRITE_EXTERNAL_STORAGE”
String fileName="myfile.txt";
String input="Hello World";
String path = Environment.getExternalStorageState();
File file=null;
if (Environment.MEDIA_MOUNTED.equals(path)) {
try {
byte[] attachment = input.getBytes();
File folder = new File(Environment.getExternalStoragePublicDirectory(
Environment.DIRECTORY_DOWNLOADS)+"/Email_Client/");
folder.mkdirs();
file=new File(folder,fileName);
//Automatically creates the new empty file specified by the name, if it is not exist.
file.createNewFile();
Log.i("EmailClient", "saveFile: Dir created");
FileOutputStream out = new FileOutputStream(file);
out.write(attachment);
out.close();
} catch (IOException e) {
Log.e("EmailClient", "saveFile: File not saved", e);;
}
}
Please refer this URL: https://developer.android.com/reference/android/os/Environment.html#getExternalStoragePublicDirectory(java.lang.String)
请参考这个网址：https: //developer.android.com/reference/android/os/Environment.html#getExternalStoragePublicDirectory(java.lang.String)
