从 mediastore 的 URI 中获取文件名和路径 [英] Get filename and path from URI from mediastore

问题描述

我有一个 onActivityResult 从媒体存储图像选择返回，我可以使用以下方法获取图像的 URI:

I have an onActivityResult returning from an mediastore image selection which I can get a URI for an image using the following:

Uri selectedImage = data.getData();

将其转换为字符串给出:

Converting this to a string gives this:

content://media/external/images/media/47

或者给一个路径:

/external/images/media/47

但是我似乎无法找到将其转换为绝对路径的方法，因为我想将图像加载到位图中而不必将其复制到某处.我知道这可以使用 URI 和内容解析器来完成，但这似乎在手机重启时中断，我猜 MediaStore 在重启之间不会保持其编号相同.

However I can't seem to find a way to convert this into an absolute path, as I want to load the image into a bitmap without having to copy it somewhere. I know this can be done using the URI and content resolver, but this seems to break on rebooting of the phone, I guess MediaStore doesn't keep its numbering the same between reboots.

推荐答案

Below API 19 使用此代码从 URI 获取文件路径:

Below API 19 use this code to get File Path from URI:

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

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