英文:
From Uri to Environment.DIRECTORY_DCIM
问题
以下是翻译好的代码部分：
public void startChoose(View view) {
Intent i = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
i.addCategory(Intent.CATEGORY_DEFAULT);
startActivityForResult(Intent.createChooser(i, "选择目录"), 8010);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case 8010:
mypath = data.getData().toString();
break;
}
}
他选择的目录会被存储在 mypath 变量中，例如选择了 DCIM 目录：
content://com.android.externalstorage.documents/tree/primary%3ADCIM
现在，是否可能从 content://com.android.externalstorage.documents/tree/primary%3ADCIM 转换为 Environment.DIRECTORY_DCIM，以及如何实现？
换句话说，当用户选择了 DCIM 目录，我想要获取变量 Environment.DIRECTORY_DCIM 对应于 mypath，有什么方法可以实现这一点？
英文:
A user chooses a directory through the following code:
public void startChoose(View view) {
Intent i = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
i.addCategory(Intent.CATEGORY_DEFAULT);
startActivityForResult(Intent.createChooser(i, "Choose directory"), 8010);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
switch (requestCode) {
case 8010:
mypath = data.getData().toString();
break;
}
}
His directory is stored in mypath as following (e.g. with DCIM):
content://com.android.externalstorage.documents/tree/primary%3ADCIM
Now, is it possible to go from content://com.android.externalstorage.documents/tree/primary%3ADCIM to Environment.DIRECTORY_DCIMand how?
Asked differently, I would like to get the variable Environment.DIRECTORY_DCIM for mypath when the User chooses the DCIM directory. How can one do that?
答案1
得分: 1
不。您获得的Uri不必对应一个文件（例如，它指向Google Drive中的文档）。即使它对应一个文件，它也不必位于与Environment相关联的目录中（例如，它指向一个自定义目录中的文件）。
请只使用Uri。
英文:
> Now, is it possible to go from content://com.android.externalstorage.documents/tree/primary%3ADCIM to Environment.DIRECTORY_DCIMand how?
No. The Uri that you get back does not have to correspond to a file (e.g., it points to a document in Google Drive). Even if it corresponds to a file, it does not have to reside in a directory that is tied to Environment (e.g., it points to a file in a custom directory).
Please just use the Uri.
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