从 Uri 获取视频缩略图 [英] Get Video Thumbnail from Uri

问题描述

我想从我的图库中选择一个视频.它工作正常.但现在我想显示一个位图，作为缩略图.我试过这段代码，但它不起作用，它总是说:NullPointerException

I want to select a video from my Gallery. It's working fine. But now I want to display a Bitmap, as a thumbnail.I tried this code and it's not working, it always says: NullPointerException

Bitmap bitmap2 = ThumbnailUtils.createVideoThumbnail(uri.getPath, MediaStore.Video.Thumbnails.MICRO_KIND);

这一切都在 onActivityResult() 中.

如何从视频 Uri 中获取 Bitmap??

How can I get the Bitmap from the video Uri??

感谢您的帮助

推荐答案

in onActivityResult

String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = context.getContentResolver().query(uri, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();

Bitmap bitmap = ThumbnailUtils.createVideoThumbnail(picturePath, MediaStore.Video.Thumbnails.MICRO_KIND);

编辑

Kotlin 版本

val filePathColumn = arrayOf(MediaStore.Images.Media.DATA)
val cursor = context.contentResolver.query(uri, filePathColumn, null, null, null)
cursor.moveToFirst()

val columnIndex = cursor.getColumnIndex(filePathColumn[0])
val picturePath = cursor.getString(columnIndex)
cursor.close()

val bitmap = ThumbnailUtils.createVideoThumbnail(picturePath, MediaStore.Video.Thumbnails.MICRO_KIND)

这篇关于从 Uri 获取视频缩略图的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！