拍照时获取 - java.lang.Throwable: file:// Uri 通过 ClipData.Item.getUri() 暴露
Posted
技术标签:
【中文标题】拍照时获取 - java.lang.Throwable: file:// Uri 通过 ClipData.Item.getUri() 暴露【英文标题】:when take photo get - java.lang.Throwable: file:// Uri exposed through ClipData.Item.getUri() 【发布时间】:2015-12-13 21:47:38 【问题描述】: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);
我搜索了类似的问题和解决方案。 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);
但这也行不通。
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? 要求一些预付款。 在线等待...
【问题讨论】:
【参考方案1】:我已经解决了这个问题。
首先,出现此问题是因为 StrictMode
阻止使用 file://
方案传递 URI。
所以有两种解决方案:
更改StrictMode
。请参阅 similar problem 和 its code。
但是对于我们的应用来说,修改Android源代码是不现实的。
使用另一个 URI 方案,而不是 file://
。例如,content://
与 MediaStore
相关。
所以我选择了第二种方法:
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,还有一个solution。
【讨论】:
"...需要 android.permission.WRITE_EXTERNAL_STORAGE 或 grantUriPermission()"【参考方案2】:所以,我实际上是在阅读这方面的内容,似乎处理此问题的正确解决方案如下:
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);
请注意,Google 说要创建一个“content://”文件,而不是基于“file://”的资源。
这是来自谷歌:
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,您还需要设置以下内容:
Now, you need to configure the FileProvider. In your app's manifest, add a provider to your application:
<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:(取自谷歌网站)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:请在此处阅读 https://developer.android.com/training/camera/photobasics.html
【讨论】:
【参考方案3】:除了使用 FileProvider 的解决方案之外,还有另一种解决方法。简单地放在 Application.onCreate() 方法中。这样VM就忽略了文件URI暴露。
StrictMode.VmPolicy.Builder builder = new StrictMode.VmPolicy.Builder();
StrictMode.setVmPolicy(builder.build());
【讨论】:
你能解释一下这到底是做什么的吗? 我不知道它在做什么,但解决了我的问题。谢谢【参考方案4】:这个错误的原因是 file:// uri 方案不再支持,因为安全性暴露。 https://code.google.com/p/android/issues/detail?id=203555
在使用 targetSDK 'N' 之后,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:// 的人都可以更改 content:// 以提供各种本地文件。
【讨论】:
谢谢,我将targetSdk
降级为23,它已经开始工作了。我的意思是File.getUriFrom(File file)
【参考方案5】:
总结一下: file:// 方案现在不允许在 targetSdkVersion 24 (Android Nougat) 上附加 Intent
如果您计划支持 api 24+,则必须更改您的代码 两个链接: https://developer.android.com/training/camera/photobasics.html https://inthecheesefactory.com/blog/how-to-share-access-to-file-with-fileprovider-on-android-nougat/en
【讨论】:
好一个,真的很有帮助以上是关于拍照时获取 - java.lang.Throwable: file:// Uri 通过 ClipData.Item.getUri() 暴露的主要内容,如果未能解决你的问题,请参考以下文章
拍照时获取 - java.lang.Throwable: file:// Uri 通过 ClipData.Item.getUri() 暴露
Android开发(51) 摄像头自动对焦。在OpenCV图像识别中连续拍照时自动对焦和拍照。