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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
我一直在尋找這個問題。 它實際上可以在舊版android中工作,但是在更新SDK之后,出現錯誤。 錯誤消息是“打開文件:ENOTDIR(不是目錄):/ sdcard / PlayNumbers / mysdfile.xml”能否請別人指出我做錯了什么? 我的代碼如下。
非常感謝,
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,我已經像你們提到的一樣更改了我的代碼,但是它仍然給我同樣的錯誤,即它不是目錄...任何想法???
假設您在清單中擁有正確的權限,這應該可以工作:
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();
}
您只需要更改為以下代碼,因為您缺少“ /”:
myFile = new File(path,"/mysdfile.xml");
但是請記住,您必須具有在清單文件中寫入外部存儲的權限:
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
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