从android中的文件路径获取内容uri
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Get content uri from file path in android
提问by pankajagarwal
I know the absolute path of an image (say for eg, /sdcard/cats.jpg). Is there any way to get the content uri for this file ?
我知道图像的绝对路径（例如，/sdcard/cats.jpg）。有没有办法获取这个文件的内容uri？
Actually in my code, I download an image and save it at a particular location. In order to set the image in an ImageView instance, currently I open the file using the path, get the bytes and create a bitmap and then set the bitmap in the ImageView instance. This is a very slow process, instead if I could get the content uri then I could very easily use the method imageView.setImageUri(uri)
实际上，在我的代码中，我下载了一个图像并将其保存在特定位置。为了在 ImageView 实例中设置图像，目前我使用路径打开文件，获取字节并创建位图，然后在 ImageView 实例中设置位图。这是一个非常缓慢的过程，相反，如果我可以获得内容 uri，那么我可以很容易地使用该方法 imageView.setImageUri(uri)
回答by Francesco Laurita
Try with:
尝试：
ImageView.setImageURI(Uri.fromFile(new File("/sdcard/cats.jpg")));
Or with:
或与：
ImageView.setImageURI(Uri.parse(new File("/sdcard/cats.jpg").toString()));
回答by Jinal Jogiyani
UPDATE
更新
Here it is assumed that your media (Image/Video) is already added to content media provider. If not then you will not able to get the content URL as exact what you want. Instead there will be file Uri.
这里假设您的媒体（图像/视频）已经添加到内容媒体提供商。如果没有，那么您将无法获得您想要的内容 URL。取而代之的是文件 Uri。
I had same question for my file explorer activity. You should know that the contenturi for file only supports mediastore data like image, audio and video. I am giving you the code for getting image content uri from selecting an image from sdcard. Try this code, maybe it will work for you...
我对我的文件浏览器活动有同样的问题。您应该知道 file 的 contenturi 仅支持图像、音频和视频等媒体存储数据。我正在为您提供通过从 sdcard 中选择图像来获取图像内容 uri 的代码。试试这个代码，也许它对你有用......
public static Uri getImageContentUri(Context context, File imageFile) {
String filePath = imageFile.getAbsolutePath();
Cursor cursor = context.getContentResolver().query(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
new String[] { MediaStore.Images.Media._ID },
MediaStore.Images.Media.DATA + "=? ",
new String[] { filePath }, null);
if (cursor != null && cursor.moveToFirst()) {
int id = cursor.getInt(cursor.getColumnIndex(MediaStore.MediaColumns._ID));
cursor.close();
return Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "" + id);
} else {
if (imageFile.exists()) {
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.DATA, filePath);
return context.getContentResolver().insert(
MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
} else {
return null;
}
}
}
回答by AndroidDebaser
// This code works for images on 2.2, not sure if any other media types
// 此代码适用于 2.2 上的图像，不确定是否还有其他媒体类型
//Your file path - Example here is "/sdcard/cats.jpg"
final String filePathThis = imagePaths.get(position).toString();
MediaScannerConnectionClient mediaScannerClient = new
MediaScannerConnectionClient() {
private MediaScannerConnection msc = null;
{
msc = new MediaScannerConnection(getApplicationContext(), this);
msc.connect();
}
public void onMediaScannerConnected(){
msc.scanFile(filePathThis, null);
}
public void onScanCompleted(String path, Uri uri) {
//This is where you get your content uri
Log.d(TAG, uri.toString());
msc.disconnect();
}
};
回答by Jon O
The accepted solution is probably the best bet for your purposes, but to actually answer the question in the subject line:
接受的解决方案可能是您的最佳选择，但要实际回答主题行中的问题：
In my app, I have to get the path from URIs and get the URI from paths. The former:
在我的应用程序中，我必须从 URI 中获取路径并从路径中获取 URI。前者：
/**
* Gets the corresponding path to a file from the given content:// URI
* @param selectedVideoUri The content:// URI to find the file path from
* @param contentResolver The content resolver to use to perform the query.
* @return the file path as a string
*/
private String getFilePathFromContentUri(Uri selectedVideoUri,
ContentResolver contentResolver) {
String filePath;
String[] filePathColumn = {MediaColumns.DATA};
Cursor cursor = contentResolver.query(selectedVideoUri, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
filePath = cursor.getString(columnIndex);
cursor.close();
return filePath;
}
The latter (which I do for videos, but can also be used for Audio or Files or other types of stored content by substituting MediaStore.Audio (etc) for MediaStore.Video):
后者（我为视频做的，但也可以用于音频或文件或其他类型的存储内容，通过将 MediaStore.Audio（等）替换为 MediaStore.Video）：
/**
* Gets the MediaStore video ID of a given file on external storage
* @param filePath The path (on external storage) of the file to resolve the ID of
* @param contentResolver The content resolver to use to perform the query.
* @return the video ID as a long
*/
private long getVideoIdFromFilePath(String filePath,
ContentResolver contentResolver) {
long videoId;
Log.d(TAG,"Loading file " + filePath);
// This returns us content://media/external/videos/media (or something like that)
// I pass in "external" because that's the MediaStore's name for the external
// storage on my device (the other possibility is "internal")
Uri videosUri = MediaStore.Video.Media.getContentUri("external");
Log.d(TAG,"videosUri = " + videosUri.toString());
String[] projection = {MediaStore.Video.VideoColumns._ID};
// TODO This will break if we have no matching item in the MediaStore.
Cursor cursor = contentResolver.query(videosUri, projection, MediaStore.Video.VideoColumns.DATA + " LIKE ?", new String[] { filePath }, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(projection[0]);
videoId = cursor.getLong(columnIndex);
Log.d(TAG,"Video ID is " + videoId);
cursor.close();
return videoId;
}
Basically, the DATAcolumn of MediaStore(or whichever sub-section of it you're querying) stores the file path, so you use that info to look it up.
基本上，DATA列MediaStore（或您查询的任何子部分）存储文件路径，因此您可以使用该信息进行查找。
回答by Abhishek Meharia
You can use these two ways based on use
您可以根据用途使用这两种方式
Uri uri = Uri.parse("String file location");
Uri uri = Uri.parse("String file location");
or
或者
Uri uri = Uri.fromFile(new File("string file location"));
Uri uri = Uri.fromFile(new File("string file location"));
I have tried both ways and both works.
我已经尝试了两种方法并且都有效。
回答by artenson.art98
Its late, but may help someone in future.
晚了，但将来可能会帮助某人。
To get content URI for a file, you may use the following method:
要获取文件的内容 URI，您可以使用以下方法：
FileProvider.getUriForFile(Context context, String authority, File file)
FileProvider.getUriForFile(Context context, String authority, File file)
It returns the content URI.
它返回内容 URI。
回答by Thracian
Easiest and the robust way for creating Content Uri content://from a File is to use FileProvider. Uri provided by FileProvider can be used also providing Uri for sharing files with other apps too. To get File Uri from a absolute path of Fileyou can use DocumentFile.fromFile(new File(path, name)), it's added in Api 22, and returns null for versions below.
content://从文件创建 Content Uri 的最简单、最可靠的方法是使用FileProvider。FileProvider 提供的 Uri 也可以用于提供 Uri 与其他应用程序共享文件。要从绝对路径获取文件 Uri，File您可以使用 DocumentFile.fromFile(new File(path, name))，它是在 Api 22 中添加的，并且对于以下版本返回 null。
File imagePath = new File(Context.getFilesDir(), "images");
File newFile = new File(imagePath, "default_image.jpg");
Uri contentUri = getUriForFile(getContext(), "com.mydomain.fileprovider", newFile);
回答by BogdanBiv
Obtaining the File ID without writing any code, just with adb shell CLI commands:
无需编写任何代码即可获取文件 ID，只需使用 adb shell CLI 命令：
adb shell content query --uri "content://media/external/video/media" | grep FILE_NAME | grep -Eo " _id=([0-9]+)," | grep -Eo "[0-9]+"
回答by Jorgesys
Is better to use a validation to support versions pre Android N, example:
最好使用验证来支持 Android N 之前的版本，例如：
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
imageUri = Uri.parse(filepath);
} else{
imageUri = Uri.fromFile(new File(filepath));
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
ImageView.setImageURI(Uri.parse(new File("/sdcard/cats.jpg").toString()));
} else{
ImageView.setImageURI(Uri.fromFile(new File("/sdcard/cats.jpg")));
}
回答by caopeng
U can try below code snippet
你可以试试下面的代码片段
public Uri getUri(ContentResolver cr, String path){
Uri mediaUri = MediaStore.Files.getContentUri(VOLUME_NAME);
Cursor ca = cr.query(mediaUri, new String[] { MediaStore.MediaColumns._ID }, MediaStore.MediaColumns.DATA + "=?", new String[] {path}, null);
if (ca != null && ca.moveToFirst()) {
int id = ca.getInt(ca.getColumnIndex(MediaStore.MediaColumns._ID));
ca.close();
return MediaStore.Files.getContentUri(VOLUME_NAME,id);
}
if(ca != null) {
ca.close();
}
return null;
}
