Suchen nach Dateipfad für Dokument aus dem internen Speicher

Question

Im Erstellen einer App, mit der Sie Dateien von Ihrem Gerät auswählen und sie als Anhang an ein MailMessage-Objekt anhängen können. Mit dem folgenden Code konnte ich den Inhalt uri eines Bildes vom Gerät nehmen und dann verwenden, um einen Dateipfad als String anzugeben. Wie würde ich diesen Code wechseln, um mit .doc/.docx/pdf Dateitypen zu arbeiten?

{ 
     string filePath = null; 
     Uri _uri = data.Data; 
     if (_uri != null && "content".Equals(_uri.Scheme)) 
     { 
      ICursor cursor = this.ContentResolver.Query(_uri, new String[] { Android.Provider.MediaStore.Images.ImageColumns.Data }, null, null, null); 
      cursor.MoveToFirst(); 
      filePath = cursor.GetString(0); 
      cursor.Close(); 
     } 
     else 
     { 
      filePath = _uri.Path; 
     } 
     return filePath; 
    } 

Answer 1

können Sie getPath

public class Uris { 

    private static String getFileName(Context context, Uri uri) { 
     String result = null; 
     if (uri.getScheme().equals("content")) { 
      Cursor cursor = context.getContentResolver().query(uri, null, null, null, null); 
      try { 
       if (cursor != null && cursor.moveToFirst()) { 
        result = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME)); 
       } 
      } finally { 
       cursor.close(); 
      } 
     } 
     if (result == null) { 
      result = uri.getPath(); 
      int cut = result.lastIndexOf('/'); 
      if (cut != -1) { 
       result = result.substring(cut + 1); 
      } 
     } 
     return result; 
    } 




    @TargetApi(Build.VERSION_CODES.KITKAT) 
    public static String getPath(final Context context, final Uri uri) 
    { 
    final boolean isKitKat = Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT; 

    // DocumentProvider 
    if (isKitKat && DocumentsContract.isDocumentUri(context, uri)) { 

     // ExternalStorageProvider 
     if (isExternalStorageDocument(uri)) { 
      final String docId = DocumentsContract.getDocumentId(uri); 
      final String[] split = docId.split(":"); 
      final String type = split[0]; 

      if ("primary".equalsIgnoreCase(type)) { 
       return Environment.getExternalStorageDirectory() + "/" + split[1]; 
      } 
     } 
     // DownloadsProvider 
     else if (isDownloadsDocument(uri)) { 
/* 
      final String id = DocumentsContract.getDocumentId(uri); 
      final Uri contentUri = ContentUris.withAppendedId(
        Uri.parse("content://<span id=\"IL_AD1\" class=\"IL_AD\">downloads</span>/public_downloads"), Long.valueOf(id)); 
      return getDataColumn(context, contentUri, null, null); 
*/ 
      String fileName = getFileName(context, uri); 
      File downFile = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), "/"+fileName); 
      return downFile.getAbsolutePath(); 
     } 
     // MediaProvider 
     else if (isMediaDocument(uri)) { 
      final String docId = DocumentsContract.getDocumentId(uri); 
      final String[] split = docId.split(":"); 
      final String type = split[0]; 

      Uri contentUri = null; 
      if ("image".equals(type)) { 
       contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI; 
      } else if ("video".equals(type)) { 
       contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI; 
      } else if ("audio".equals(type)) { 
       contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI; 
      } 

      final String selection = "_id=?"; 
      final String[] selectionArgs = new String[] { 
        split[1] 
      }; 

      return getDataColumn(context, contentUri, selection, selectionArgs); 
     } 
    } 
    // MediaStore (and general) 
    else if ("content".equalsIgnoreCase(uri.getScheme())) { 

     // Return the remote address 
     if (isGooglePhotosUri(uri)) 
      return uri.getLastPathSegment(); 

     return getDataColumn(context, uri, null, null); 
    } 
    // File 
    else if ("file".equalsIgnoreCase(uri.getScheme())) { 
     return uri.getPath(); 
    } 

    return null; 
} 

    /** 
    * Get the value of the data column for this Uri. This is useful for 
    * MediaStore Uris, and other file-based ContentProviders. 
    * 
    * @param context The context. 
    * @param uri The Uri to query. 
    * @param selection (Optional) Filter used in the query. 
    * @param selectionArgs (Optional) Selection arguments used in the query. 
    * @return The value of the _data column, which is typically a file path. 
    */ 
    public static String getDataColumn(Context context, Uri uri, String selection, 
             String[] selectionArgs) { 

     Cursor cursor = null; 
     final String column = "_data"; 
     final String[] projection = { 
       column 
     }; 

     try { 
      cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, 
        null); 
      if (cursor != null && cursor.moveToFirst()) { 
       final int index = cursor.getColumnIndexOrThrow(column); 
       return cursor.getString(index); 
      } 
     } finally { 
      if (cursor != null) 
       cursor.close(); 
     } 
     return null; 
    } 

    /** 
    * @param uri The Uri to check. 
    * @return Whether the Uri authority is ExternalStorageProvider. 
    */ 
    public 
    static boolean isExternalStorageDocument(Uri uri) { 
     return "com.android.externalstorage.documents".equals(uri.getAuthority()); 
    } 

    /** 
    * @param uri The Uri to check. 
    * @return Whether the Uri authority is DownloadsProvider. 
    */ 
    public static boolean isDownloadsDocument(Uri uri) { 
     return "com.android.providers.downloads.documents".equals(uri.getAuthority()); 
    } 

    /** 
    * @param uri The Uri to check. 
    * @return Whether the Uri authority is MediaProvider. 
    */ 
    public static boolean isMediaDocument(Uri uri) { 
     return "com.android.providers.media.documents".equals(uri.getAuthority()); 
    } 

    /** 
    * @param uri The Uri to check. 
    * @return Whether the Uri authority is Google <span id="IL_AD8" class="IL_AD">Photos</span>. 
    */ 
    public static boolean isGooglePhotosUri(Uri uri) { 
     return "com.google.android.apps.photos.content".equals(uri.getAuthority()); 
    } 

}