[bugfix] Uploader: can not upload pic in android (#929)

docs/markdown/en-US/uploader.md

@@ -43,6 +43,7 @@ You can set native properties such as `accpet`、`multiple` on Uploader, and the
 | Attribute | Description | Type | Default | Accepted Values |
 |-----------|-----------|-----------|-------------|-------------|
 | result-type | Type of file read result | `String` | `dataUrl` | `text` |
+| accept | Accepted file type | `String` | `image/*` | - |
 | disabled | Whether to disabled the upload | `Boolean` | `false` | - |
 | before-read | Hook before reading the file, return false to stop reading the file | `Function` | - | - |
 | after-read | Hook after reading the file | `Function` | - | - |

docs/markdown/zh-CN/uploader.md

@@ -41,6 +41,7 @@ export default {
 | 参数 | 说明 | 类型 | 默认值 | 可选值 |
 |-----------|-----------|-----------|-------------|-------------|
 | result-type | 文件读取结果类型 | `String` | `dataUrl` | `text` |
+| accept | 接受的文件类型 | `String` | `image/*` | - |
 | disabled | 是否禁用图片上传 | `Boolean` | `false` | - |
 | before-read | 读取前的回调函数，返回 false 可终止文件读取 | `Function` | - | - |
 | after-read | 读取完成后的回调函数 | `Function` | - | - |