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[英]FileNotFoundException (permission denied) when trying to write file to sdcard in Android
[英]Write a file in SDcard in Android
我一直在寻找这个问题。 它实际上可以在旧版android中工作,但是在更新SDK之后,出现错误。 错误消息是“打开文件:ENOTDIR(不是目录):/ sdcard / PlayNumbers / mysdfile.xml”能否请别人指出我做错了什么? 我的代码如下。
非常感谢,
path=new File("/sdcard/PlayNumbers");
myFile = new File(path,"mysdfile.xml");
if (!path.exists()) {
path.mkdirs();
}
if(!myFile.exists()){
myFile.createNewFile();
}
FileOutputStream fOut = new FileOutputStream(myFile);
OutputStreamWriter myOutWriter = new OutputStreamWriter(fOut);
myOutWriter.append("test");
myOutWriter.close();
fOut.close();
==>
File path = null;
File myFile = null;
String filePath = Environment.getExternalStorageDirectory().toString();
path=new File(filePath+"/PlayNumbers/");
myFile = new File(path,"mysdfile.xml");
//i also tried both as below
//path=new File(filePath+"/PlayNumbers");
//myFile = new File(path,"mysdfile.xml");
if (!path.exists()) {
path.mkdirs();
}
if(!myFile.exists()){
myFile.createNewFile();
}
FileOutputStream fOut = new FileOutputStream(myFile);
OutputStreamWriter myOutWriter = new OutputStreamWriter(fOut);
myOutWriter.append("test");
myOutWriter.close();
fOut.close();
ps好的,我已经像你们提到的一样更改了我的代码,但是它仍然给我同样的错误,即它不是目录...任何想法???
假设您在清单中拥有正确的权限,这应该可以工作:
File externalStorageDir = Environment.getExternalStorageDirectory();
File playNumbersDir = new File(externalStorageDir, "PlayNumbers");
File myFile = new File(playNumbersDir, "mysdfile.xml");
if (!playNumbersDir.exists()) {
playNumbersDir.mkdirs();
}
if(!myFile.exists()){
myFile.createNewFile();
}
您只需要更改为以下代码,因为您缺少“ /”:
myFile = new File(path,"/mysdfile.xml");
但是请记住,您必须具有在清单文件中写入外部存储的权限:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
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