当通过ClipData.Item.getUri()获取照片时,获取 – java.lang.Throwable:file:// Uri。

例外是:

file:// Uri exposed through ClipData.Item.getUri() java.lang.Throwable: file:// Uri exposed through ClipData.Item.getUri() at android.os.StrictMode.onFileUriExposed(StrictMode.java:1618) at android.net.Uri.checkFileUriExposed(Uri.java:2341) at android.content.ClipData.prepareToLeaveProcess(ClipData.java:808) at android.content.Intent.prepareToLeaveProcess(Intent.java:7926) at android.app.Instrumentation.execStartActivity(Instrumentation.java:1506) at android.app.Activity.startActivityForResult(Activity.java:3832) at android.app.Activity.startActivityForResult(Activity.java:3783) at android.support.v4.app.FragmentActivity.startActivityFromFragment(Unknown Source) at android.support.v4.app.Fragment.startActivityForResult(Unknown Source) at me.chunyu.ChunyuDoctor.Utility.w.takePhoto(Unknown Source) at me.chunyu.ChunyuDoctor.Dialog.ChoosePhotoDialogFragment.takePhoto(Unknown Source) at me.chunyu.ChunyuDoctor.Dialog.ChoosePhotoDialogFragment.access$000(Unknown Source) at me.chunyu.ChunyuDoctor.Dialog.b.onClick(Unknown Source) at me.chunyu.ChunyuDoctor.Dialog.ChoiceDialogFragment.onClick(Unknown Source) at android.view.View.performClick(View.java:4848) at android.view.View$PerformClick.run(View.java:20270) at android.os.Handler.handleCallback(Handler.java:815) at android.os.Handler.dispatchMessage(Handler.java:104) at android.os.Looper.loop(Looper.java:194) at android.app.ActivityThread.main(ActivityThread.java:5643) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:960) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755) 

我的代码在这里:

 public static void takePhoto(Fragment fragment, int token, Uri uri) { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); if (uri != null) { intent.putExtra(MediaStore.EXTRA_OUTPUT, uri); } fragment.startActivityForResult(intent, token); } 

我search了类似的问题和解决scheme。 并修改代码如下:

 public static void takePhoto(Fragment fragment, int token, Uri uri) { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION); if (uri != null) { intent.putExtra(MediaStore.EXTRA_OUTPUT, uri); intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1); } fragment.startActivityForResult(intent, token); } 

但这也是行不通的。

它发生在Android 5.1上,而在Android 4.3上运行良好。 有没有人遇到同样的问题? 要求一些进步。 在线等待…

Solutions Collecting From Web of "当通过ClipData.Item.getUri()获取照片时,获取 – java.lang.Throwable:file:// Uri。"

我已经解决了这个问题。

首先,发生这个问题是因为StrictMode使用file:// scheme阻止传递URI。

所以有两个解决scheme:

  1. 更改StrictMode 。 看到类似的问题和它的代码 。 但是对于我们的应用程序,修改Android源代码是不现实的。

  2. 使用另一个URIscheme,而不是file:// 。 例如, content://MediaStore相关。

所以我select了第二种方法:

 private void doTakePhoto() { try { ContentValues values = new ContentValues(1); values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpg"); mCameraTempUri = getActivity().getContentResolver() .insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values); takePhoto(this, RequestCode.REQCODE_TAKE_PHOTO, mCameraTempUri); } catch (Exception e) { e.printStackTrace(); } } public static void takePhoto(Fragment fragment, int token, Uri uri) { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION); if (uri != null) { intent.putExtra(MediaStore.EXTRA_OUTPUT, uri); intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1); } fragment.startActivityForResult(intent, token); } 

另外,还有另一个解决scheme 。

所以,我实际上正在阅读这个,看来解决这个问题的正确方法如下:

 String mCurrentPhotoPath; private File createImageFile() throws IOException { // Create an image file name String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); String imageFileName = "JPEG_" + timeStamp + "_"; File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES); File image = File.createTempFile( imageFileName, /* prefix */ ".jpg", /* suffix */ storageDir /* directory */ ); // Save a file: path for use with ACTION_VIEW intents mCurrentPhotoPath = "file:" + image.getAbsolutePath(); return image; } static final int REQUEST_TAKE_PHOTO = 1; private void dispatchTakePictureIntent() { Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); // Ensure that there's a camera activity to handle the intent if (takePictureIntent.resolveActivity(getPackageManager()) != null) { // Create the File where the photo should go File photoFile = null; try { photoFile = createImageFile(); } catch (IOException ex) { // Error occurred while creating the File ... } // Continue only if the File was successfully created if (photoFile != null) { Uri photoURI = FileProvider.getUriForFile(this, "com.example.android.fileprovider", photoFile); takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI); startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO); } } } 

注意有一个谷歌说,创build一个“content://”文件,而不是基于“file://”资源的说明。

这是从谷歌:

Note: We are using getUriForFile(Context, String, File) which returns a content:// URI. For more recent apps targeting Android N and higher, passing a file:// URI across a package boundary causes a FileUriExposedException. Therefore, we now present a more generic way of storing images using a FileProvider.

此外,您将需要设置以下内容: Now, you need to configure the FileProvider. In your app's manifest, add a provider to your application: Now, you need to configure the FileProvider. In your app's manifest, add a provider to your application:

 <application> ... <provider android:name="android.support.v4.content.FileProvider" android:authorities="com.example.android.fileprovider" android:exported="false" android:grantUriPermissions="true"> <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths"></meta-data> </provider> ... </application> 

注意:(从谷歌的网站采取) Make sure that the authorities string matches the second argument to getUriForFile(Context, String, File). In the meta-data section of the provider definition, you can see that the provider expects eligible paths to be configured in a dedicated resource file, res/xml/file_paths.xml. Here is the content required for this particular example: Make sure that the authorities string matches the second argument to getUriForFile(Context, String, File). In the meta-data section of the provider definition, you can see that the provider expects eligible paths to be configured in a dedicated resource file, res/xml/file_paths.xml. Here is the content required for this particular example:

 <?xml version="1.0" encoding="utf-8"?> <paths xmlns:android="http://schemas.android.com/apk/res/android"> <external-path name="my_images" path="Android/data/com.example.package.name/files/Pictures" /> </paths> 

如果您想了解更多信息,请阅读https://developer.android.com/training/camera/photobasics.html

这个错误的原因是file:// uri scheme不再受到支持,因为安全性是暴露的。 https://code.google.com/p/android/issues/detail?id=203555

而且,在targetSDK为“N”后,我们不能再使用file:// uri。 https://commonsware.com/blog/2016/03/14/psa-file-scheme-ban-n-developer-preview.html

所以,答案是正确的。 任何使用file://的人都会改变内容://提供各种本地文件。

总结:file://scheme现在不允许附加在targetSdkVersion 24(Android Nougat)上的Intent上,

你必须改变你的代码,如果你打算支持api 24+两个链接: https : //developer.android.com/training/camera/photobasics.html https://inthecheesefactory.com/blog/how-to-share-访问到文件与- fileprovider上,Android的牛轧糖/ EN

除了使用FileProvider的解决scheme之外,还有另一种解决方法。 只需放入Application.onCreate()方法即可。 这样虚拟机忽略文件的URI暴露。

 StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder(); StrictMode.setVmPolicy(builder.build());