如何将URI转换为棉花糖中的真实路径？

问题描述

我有一个图片URI，我想将此URI转换为真实路径。我看了很多答案，但没有一个对我有用。我正在使用marshmallow 6.0.1。图片URI是 content：//com.android.providers.media.documents/document/image%3A52530 。

I have an image URI and I want to convert this URI to a real path. I've looked at lot of of answers but none worked for me. I'm using marshmallow 6.0.1. The image URI is content://com.android.providers.media.documents/document/image%3A52530.

代码：

   sendImageFromFolder.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                     Intent intent = new Intent();
                    intent.setType("image/*");
                    intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
                    intent.setAction(Intent.ACTION_GET_CONTENT);
                    startActivityForResult(Intent.createChooser(intent,"Select Picture"), 1);

                }
            });

     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);

     if(requestCode==1) {
          Uri uri = data.getData();//how to convert this uri to real path .
    }

    }

推荐答案

Uri 不是文件。 Uri 不必表示您可以访问的文件系统上的文件。 Uri 可能指向以下内容：

A Uri is not a File. A Uri does not have to represent a file on the filesystem that you can access. The Uri might point to content that is:

• 存储在可移动存储上，你无法访问


• 存储在另一个应用程序的内部存储上，你无法访问


• 以加密形式存储，其中 ContentProvider 需要解密它


• 存储在SQLite数据库的BLOB列中，其中 ContentProvider 需要加载并提供它


• 存储在云中，其中 ContentProvider 需要下载


• 即时生成，此网页的方式


• 依此类推

• stored on removable storage, which you cannot access
• stored on internal storage of another app, which you cannot access
• stored in an encrypted form, where a ContentProvider needs to decrypt it
• stored in a BLOB column of a SQLite database, where a ContentProvider needs to load it and serve it
• stored in "the cloud", where a ContentProvider needs to download it
• generated on the fly, the way this Web page is
• and so on

您可以使用 ContentResolver 和 openInputStream（）来获取 InputStream 表示由 Uri 表示的内容。您可以在您控制的某个文件上创建 FileOutputStream 。并且，您可以使用Java I / O从 InputStream 复制到 OutputStream ，制作您自己的副本您控制的文件中的内容。

You can use ContentResolver and openInputStream() to get an InputStream on the content represented by the Uri. You can create a FileOutputStream on some file that you control. And, you can use Java I/O to copy from the InputStream to the OutputStream, making your own copy of the content in a file that you control.

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