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POTrouble saving file in SD card with special characters in filename
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  1. POTrouble saving file in SD card with special characters in filename
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    copied!<p>My application has a function to save file on SD card. </p> <p>Following is my code to save the file</p> <pre><code>try { File mediaDir = new File( Environment.getExternalStorageDirectory(), "Media"); if (!mediaDir.exists()) { mediaDir.mkdirs(); } File f = new File(mediaDir, fileName); f.createNewFile(); OutputStream os = new FileOutputStream(f); byte[] data = toWriteBytes; os.write(data); os.close(); } catch (Exception e) { Log.w("ExternalStorage", "Error writing "); e.printStackTrace(); } </code></pre> <p>This works totally fine before it bumped into filename containing space in it <strike>(eg. "Hello World.txt")</strike> (eg. hello? world.txt) </p> <p>Here is the stacktrace in case you all need</p> <pre><code>10-11 17:18:48.225: WARN/ExternalStorage(4519): Error writing 10-11 17:18:48.225: WARN/System.err(4519): java.io.IOException: Invalid argument 10-11 17:18:48.235: WARN/System.err(4519): at java.io.File.createNewFileImpl(Native Method)10-11 17:18:48.245: WARN/System.err(4519): at java.io.File.createNewFile(File.java:1257) 10-11 17:18:48.245: WARN/System.err(4519): at com.xxxx.Utility.createExternalStoragePrivateFile(Utility.java:87) 10-11 17:18:48.245: WARN/System.err(4519): at com.xxxxxx$1.handleMessage(Utility.java:52) 10-11 17:18:48.245: WARN/System.err(4519): at android.os.Handler.dispatchMessage(Handler.java:99) 10-11 17:18:48.245: WARN/System.err(4519): at android.os.Looper.loop(Looper.java:123) 10-11 17:18:48.245: WARN/System.err(4519): at android.app.ActivityThread.main(ActivityThread.java:3839) 10-11 17:18:48.245: WARN/System.err(4519): at java.lang.reflect.Method.invokeNative(Native Method) 10-11 17:18:48.245: WARN/System.err(4519): at java.lang.reflect.Method.invoke(Method.java:507) 10-11 17:18:48.245: WARN/System.err(4519): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841) 10-11 17:18:48.245: WARN/System.err(4519): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599) 10-11 17:18:48.245: WARN/System.err(4519): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>So, my question is what exactly might be the problem and how do i solve it?</p> <p>**Note: I tested it using single word file name and it is perfectly fine. Without <code>f.createNewFile()</code>, it will give <code>FileNotFoundException</code>.</p> <hr> <p>After seeing Mice comment, I realized that it may not be the space in the file name. So, here is the stacktrace. </p> <pre><code>10-11 18:06:20.365: WARN/System.err(5280): java.io.FileNotFoundException: /mnt/sdcard/Media/Who owns the World? Smokers or Non-smokers .acsm (Invalid argument) 10-11 18:06:20.385: WARN/System.err(5280): at org.apache.harmony.luni.platform.OSFileSystem.open(Native Method) 10-11 18:06:20.385: WARN/System.err(5280): at dalvik.system.BlockGuard$WrappedFileSystem.open(BlockGuard.java:232) 10-11 18:06:20.385: WARN/System.err(5280): at java.io.FileOutputStream.&lt;init&gt;(FileOutputStream.java:94) 10-11 18:06:20.385: WARN/System.err(5280): at java.io.FileOutputStream.&lt;init&gt;(FileOutputStream.java:66) 10-11 18:06:20.385: WARN/System.err(5280): at com.xxxx.Utility.createExternalStoragePrivateFile(Utility.java:88) 10-11 18:06:20.385: WARN/System.err(5280): at com.xxxxx.Utility$1.handleMessage(Utility.java:52) 10-11 18:06:20.385: WARN/System.err(5280): at android.os.Handler.dispatchMessage(Handler.java:99) 10-11 18:06:20.385: WARN/System.err(5280): at android.os.Looper.loop(Looper.java:123) 10-11 18:06:20.385: WARN/System.err(5280): at android.app.ActivityThread.main(ActivityThread.java:3839) 10-11 18:06:20.385: WARN/System.err(5280): at java.lang.reflect.Method.invokeNative(Native Method) 10-11 18:06:20.385: WARN/System.err(5280): at java.lang.reflect.Method.invoke(Method.java:507) 10-11 18:06:20.385: WARN/System.err(5280): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841) 10-11 18:06:20.385: WARN/System.err(5280): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599) 10-11 18:06:20.385: WARN/System.err(5280): at dalvik.system.NativeStart.main(Native Method) </code></pre> <p>My thought is it should be some invalid character in the file name. The file name is ("Who owns the World? Smokers or Non-smokers .acsm"). Any thought?</p> <hr> <p>For the benefit of those who faces similar problem, it is indeed invalid character in the file name. I found out <a href="https://stackoverflow.com/questions/2679699/what-characters-allowed-in-file-names-on-android">this thread</a> on SO which has more info about invalid characters in file name. Hope this will clear any doubts.</p>
 

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