获取点击文件后onActivityResult中文件路径错误

if (data.getData() != null) {
            if (data.getData().getScheme().equals("content")) {
                String s = data.getData().getPath();  //文件路径
                Uri uri = data.getData();  // uri
                File file = new File(s);  //可打开的文件路径

                Z.log("path: "+s);
                Z.log("uri: "+uri);
                Z.log("file: "+file);


                Z.show("获取了返回值");
                Z.log(file.exists()+"");
                if (file.exists()) {  //判断文件是否存在
                    Log.e("file", "f是文件且存在");
                    Conversation conversation = getCurrentConversation();
                    sendFile(conversation.getConversationType(), conversation.getTargetId(), file, uri);
                } else {
                    Z.log("文件不存在");
                }
            }else {
                Z.show("如果文件类型不同");
            }
            
            没毛病吧?结果是打印的path是 /document/image:4935  ,为啥是这样啊,但奇怪的事来了:我使用下载的第三方re管理器打开选择文件,却可以正常打印/storage/emulated/0/Download/1452843394654564.jpg,,,,,什么情况?

使用这句了..虽然有点长

/**

android 4.4以上和以下版本使用自带文件管理器打开本地文件路径不同,的解决方法
*
@param context
@param uri

@return
*/

       @TargetApi(Build.VERSION_CODES.KITKAT)  //版本

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 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.
*/

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;
       }
   
       /**

@param uri The Uri to check.
@return Whether the Uri authority is ExternalStorageProvider.
*/

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.
  */
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.
  */

static boolean isMediaDocument(Uri uri) {

           return "com.android.providers.media.documents".equals(uri.getAuthority());
       }

其实就一句话，不同手机拿到路径不同，需要将拿到的路径转换成绝对路径

并不是错误，而是你拿到的还只是文件的scheme路径，是uri地址，还不是真正的file路径，需要把uri转换成file，比如你现在取的是图片文件，可以这么转换

public String getRealPathFromURI(Uri uri) {
    String res = null;
    String[] proj = { MediaStore.Images.Media.DATA };
    Cursor cursor = getContentResolver().query(uri, proj, null, null, null);
    if(cursor.moveToFirst()){;
       int column_index = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
       res = cursor.getString(column_index);
    }
    cursor.close();
    return res;
}

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