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安卓调用系统文件管理器遇到的坑

安卓调用系统文件管理器遇到的坑

作者: 编程枯燥无味 | 来源:发表于2017-05-24 10:48 被阅读0次

    今天调用安卓系统文件之后获取文件路径突然出现了异常,不知道是什么情况,安卓版本5.1,先看代码:

    1.调用系统文件管理器
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("*/*");
    intent.addCategory(Intent.CATEGORY_OPENABLE);
    startActivityForResult(intent,0);
    
    2.onActivityResults处理结果
    filePath = UtilTools.getPath(getActivity(),intent.getData());
    
    3.UtilTools

    引用自CSDN论坛-Android 4.4前后版本读取图库图片和拍照完美解决方案

    /**  
         * 专为Android4.4设计的从Uri获取文件绝对路径,以前的方法已不好使  
         */  
        @SuppressLint("NewApi")  
        public 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://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;  
        }  
      
        /** 
         * 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 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;  
        }  
      
        /** 
         * @param uri The Uri to check. 
         * @return Whether the Uri authority is ExternalStorageProvider. 
         */  
        public 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 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 boolean isMediaDocument(Uri uri) {  
            return "com.android.providers.media.documents".equals(uri.getAuthority());  
        }  
    

    然后在使用中出现以下情况:

    我勒个去1113-080E这是个啥呀,查遍百度谷歌也不知道什么意思,为什么会出现,然后就会导致下面的判断失效,导致无法返回正常结果


    目前的解决办法就是:

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