我是新来的android开发,并试图做一些文件IO。每当我运行的代码块:Android - 刚刚创建的错误打开文件
File meta = new File(context.getAppContext().getFilesDir(),"meta");
meta.mkdirs();
File dir = new File(meta,"subdir");
File imageFile = new File(dir,"filename");
Log.d("test",imageFile.getAbsolutePath());
FileOutputStream outputStream = new FileOutputStream(imageFile);
我得到这个错误:
java.io.FileNotFoundException: /data/data/com.example.android.networkusage/files/meta/Greg and The Morning Buzz/artwork30.jpg: open failed: ENOENT (No such file or directory)
at libcore.io.IoBridge.open(IoBridge.java:406)
at java.io.FileOutputStream.<init>(FileOutputStream.java:88)
at java.io.FileOutputStream.<init>(FileOutputStream.java:73)
at com.example.android.networkusage.Podcast.downloadArtworkFromUrl(Podcast.java:117)
at com.example.android.networkusage.Podcast.<init>(Podcast.java:93)
at com.example.android.networkusage.JSONParser.parse(JSONParser.java:113)
at com.example.android.networkusage.NetworkActivity.loadXmlFromNetwork(NetworkActivity.java:240)
at com.example.android.networkusage.NetworkActivity.access$100(NetworkActivity.java:65)
at com.example.android.networkusage.NetworkActivity$DownloadXmlTask.doInBackground(NetworkActivity.java:203)
at com.example.android.networkusage.NetworkActivity$DownloadXmlTask.doInBackground(NetworkActivity.java:198)
at android.os.AsyncTask$2.call(AsyncTask.java:264)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:208)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
at java.lang.Thread.run(Thread.java:856)
Caused by: libcore.io.ErrnoException: open failed: ENOENT (No such file or directory)
at libcore.io.Posix.open(Native Method)
at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
at libcore.io.IoBridge.open(IoBridge.java:390)
... 16 more
日志,甚至打印出该文件的路径为指导,因此该文件必须存在!这是为什么发生?
此外,我的应用程序具有内部和外部写入权限。
@anonymouse是否有幸运? –
嗨凯文,对不起,我花了这么长时间来回复。你的答案奏效。谢谢! – anonymouse