機器人：從URI

我想仙文件到服務器實際路徑，我需要從URI得到真正的路徑。機器人：從URI

我的代碼：

public String getPathFromURI(Context context, Uri contentUri) { 
    if (contentUri.toString().indexOf("file:///") > -1){ 
     return contentUri.getPath(); 
    } 

    Cursor cursor = null; 
    try { 
     String[] proj = { MediaStore.Images.Media.DATA }; 
     cursor = context.getContentResolver().query(contentUri, proj, null, null, null); 
     int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA); 
     cursor.moveToFirst(); 
     return cursor.getString(column_index); 
    }finally { 
      if (cursor != null) { 
       cursor.close(); 
      } 
    } 
}

而且onActivityResult：

... 
imageName = data.getData(); 
imagePath = getPathFromURI(getBaseContext(),imageName); 

Picasso.with(getBaseContext()).load(imageName).into(imageView); 
...

它怎麼可能是圖像顯示的ImageView，但ImagePath的始終是空？ :)謝謝

編輯：

我如何發送圖像到服務器

HttpClient httpClient = new DefaultHttpClient(); 
HttpContext localContext = new BasicHttpContext(); 
HttpPost httpPost = new HttpPost([URL TO A SERVER]); 

MultipartEntity entity = new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE); 
entity.addPart("uploaded_file_1", new FileBody(new File(imagePath))); 

httpPost.setEntity(entity); 
httpClient.execute(httpPost, localContext);

來源

2014-10-04 Michal Heneš

可以驗證真實路徑，你的代碼的一部分，是貝ng叫？ 'getPathFromURI'方法中的'if'語句或'else'部分。另外，你可以記錄imageName（URI）的值來查看它是什麼。烏里 – NightwareSystems 2014-10-04 18:49:53

值是「內容：//com.android.blah.blah」 – 2014-10-04 18:51:10

而且堪稱是第二 – 2014-10-04 18:51:55

我通過對堆棧的答案去了，並找到了解決辦法...

public static String getPathFromURI(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://downloads/public_downloads"), Long.valueOf(id)); 

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

    return null; 
} 

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 column_index = cursor.getColumnIndexOrThrow(column); 
      return cursor.getString(column_index); 
     } 
    } finally { 
     if (cursor != null) 
      cursor.close(); 
    } 
    return null; 
} 

public static boolean isExternalStorageDocument(Uri uri) { 
    return "com.android.externalstorage.documents".equals(uri.getAuthority()); 
} 

public static boolean isDownloadsDocument(Uri uri) { 
    return "com.android.providers.downloads.documents".equals(uri.getAuthority()); 
} 

public static boolean isMediaDocument(Uri uri) { 
    return "com.android.providers.media.documents".equals(uri.getAuthority()); 
}

這將發現即使是奇巧每一種情況下（這是問題...奇巧）

來源

2014-10-04 19:30:13

機器人：從URI

回答

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