java.io.IOException: aprire fallita: EINVAL (Invalid argument) durante il salvataggio di un'immagine nella memoria esterna

Question

Questo è il mio codice:

private boolean writeToSD(Bitmap bm, String url) { 
    if (canIWriteOnSD()) { 
     File sd = Environment.getExternalStorageDirectory(); 
     File dest = new File(sd, "MoveInBlue/"); 
     try { 
      url = urlCleaner(url); 
      if (!dest.exists()) { 
       dest.mkdir(); 
      } 
      File file = new File(dest, url + ".png"); 
      if (!file.exists()) { 
       file.createNewFile(); 
      } 
      FileOutputStream out = new FileOutputStream(file); 
      bm.compress(Bitmap.CompressFormat.PNG, 90, out); 
      out.flush(); 
      out.close(); 
      return true; 
     } catch (Exception e) { 
      e.printStackTrace(); 
      // Do nothing 
     } 
    } 
    return false; 
} 

PROBLEMA RISOLTO:

urlCleaner ora restituisce url.substring (url.lastIndexOf ('?') + 1), e tutto funziona come previsto.

L'eccezione viene effettivamente generata a file.createNewFile(); e non so davvero perché.

Grazie mille.

(urlCleaner solo rimuove l'http: // ... dal URL e lascia i tag php)

Ecco il LogCat:

07-09 13:57:13.479: W/System.err(5715): java.io.IOException: open failed: EINVAL (Invalid argument) 
07-09 13:57:13.479: W/System.err(5715):  at java.io.File.createNewFile(File.java:940) 
07-09 13:57:13.479: W/System.err(5715):  at com.moveinblue.planner.asynctask.ImageDownloader.writeToSD(ImageDownloader.java:459) 
07-09 13:57:13.479: W/System.err(5715):  at com.moveinblue.planner.asynctask.ImageDownloader.access$2(ImageDownloader.java:448) 
07-09 13:57:13.479: W/System.err(5715):  at com.moveinblue.planner.asynctask.ImageDownloader$BitmapDownloaderTask.onPostExecute(ImageDownloader.java:270) 
07-09 13:57:13.479: W/System.err(5715):  at com.moveinblue.planner.asynctask.ImageDownloader$BitmapDownloaderTask.onPostExecute(ImageDownloader.java:1) 
07-09 13:57:13.479: W/System.err(5715):  at android.os.AsyncTask.finish(AsyncTask.java:602) 
07-09 13:57:13.479: W/System.err(5715):  at android.os.AsyncTask.access$600(AsyncTask.java:156) 
07-09 13:57:13.479: W/System.err(5715):  at android.os.AsyncTask$InternalHandler.handleMessage(AsyncTask.java:615) 
07-09 13:57:13.479: W/System.err(5715):  at android.os.Handler.dispatchMessage(Handler.java:99) 
07-09 13:57:13.479: W/System.err(5715):  at android.os.Looper.loop(Looper.java:137) 
07-09 13:57:13.479: W/System.err(5715):  at android.app.ActivityThread.main(ActivityThread.java:4575) 
07-09 13:57:13.489: W/System.err(5715):  at java.lang.reflect.Method.invokeNative(Native Method) 
07-09 13:57:13.489: W/System.err(5715):  at java.lang.reflect.Method.invoke(Method.java:511) 
07-09 13:57:13.489: W/System.err(5715):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:789) 
07-09 13:57:13.489: W/System.err(5715):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:556) 
07-09 13:57:13.489: W/System.err(5715):  at dalvik.system.NativeStart.main(Native Method) 
07-09 13:57:13.489: W/System.err(5715): Caused by: libcore.io.ErrnoException: open failed: EINVAL (Invalid argument) 
07-09 13:57:13.489: W/System.err(5715):  at libcore.io.Posix.open(Native Method) 
07-09 13:57:13.489: W/System.err(5715):  at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110) 
07-09 13:57:13.489: W/System.err(5715):  at java.io.File.createNewFile(File.java:933) 
07-09 13:57:13.489: W/System.err(5715):  ... 15 more 

Answer 1

La stringa url contiene caratteri non validi per un nome di file. Dovrai pulire il nome del file rimuovendo i caratteri non validi.