android4.4以及以上的系统，无法获取相册图片解决方法。

以前获取相册的图片用的这个Intent

Intent localIntent = new Intent();
localIntent.setType("image/*");
localIntent.setAction("android.intent.action.GET_CONTENT");
 
  
 然后在onActivityResult中 intent.getData() 就可以获取到图片的uri。今天用4.4的系统发现根据返回的uri获取不到对应的图bitmap了。 
  
 
  
报各种权限错误之类的，打印返回值 返现uri变了
 
  
4.4之前：content://media/external/images/media/9498
 
  
4.4之后：content://com.android.providers.media.documents/document/image%3A31581
 
  
好了废话不多说，以下是网上搜到解决方案。感谢提供解决方案的大神！
 
  
/**
	 * 根据图片的uri获取路径，用于解决4.4以上系统获取不到图片uri
	 * @param context
	 * @param uri
	 * @return
	 */
	@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];  
	            }  
	  
	            // TODO handle non-primary volumes  
	        }  
	        // 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 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 Photos.
	*/  
	public static boolean isGooglePhotosUri(Uri uri) {  
	    return "com.google.android.apps.photos.content".equals(uri.getAuthority());  
	}  
 
  
 用这个getPath方法获取到图片的路径。然后转化成uri或者Bitmapfactory.decodeFile() 大家就随意发挥吧。