Android:java.lang.SecurityException:无权访问uri 0 @ content://com.android.chrome.FileProvider/BlockedFile [英] Android: java.lang.SecurityException: does not have permission to uri 0 @ content://com.android.chrome.FileProvider/BlockedFile
问题描述
我正在开发一个包含活动的App，该活动可以通过android.intent.action.CHOOSER和android.intent.action.SEND动作调用.
I'm developing an App which contains an Activity that can be invoked via the android.intent.action.CHOOSER and android.intent.action.SEND actions.
当我通过Chrome共享网站以进行此活动时，我可以通过Uri uriScreenshot = bExtras.getParcelable("share_screenshot_as_stream");检索网站的屏幕截图，然后将该流存储到位图中.我存储它并没有什么关系，但是重要的是，该流存在于调用我的Activity的Intent中.
When I share a website via Chrome to this activity, I can retrieve the screenshot of the website via Uri uriScreenshot = bExtras.getParcelable("share_screenshot_as_stream"); and then store that stream into a Bitmap. It's not really relevant that I'm storing it, but what's important is that this stream exists in the Intent that invoked the my Activity.
有时我想转发"该Intent，让Android向用户显示系统的共享"对话框.为此，我修改了Intent，将Intent直接指向Android的内部Chooser:
Sometimes I want to "reshare" that Intent, have Android show the user the system's share dialog. In order to do this I modify the Intent, pointing the Intent directly to Android's internal Chooser:
iCurrentIntent.setClassName("android", "com.android.internal.app.ChooserActivity");
MyApplication.getAppContext().startActivity(iCurrentIntent);
我的问题是出现以下异常:
My problem is that I get the following exception:
E/AndroidRuntime: FATAL EXCEPTION: main
Process: process.name.abc.xyz, PID: 29696
java.lang.SecurityException: Uid 10107 does not have permission to uri 0 @ content://com.android.chrome.FileProvider/BlockedFile_101125595074498
at android.os.Parcel.readException(Parcel.java:1684)
at android.os.Parcel.readException(Parcel.java:1637)
at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:3101)
at android.app.Instrumentation.execStartActivity(Instrumentation.java:1518)
at android.app.ContextImpl.startActivity(ContextImpl.java:791)
at android.app.ContextImpl.startActivity(ContextImpl.java:768)
at android.content.ContextWrapper.startActivity(ContextWrapper.java:356)
at process.name.abc.xyz.managers.utils.MyReshareManager.reshare(MyReshareManager.java:155)
at process.name.abc.xyz.services.HUDService$HUDManager$11.onClick(HUDService.java:695)
at android.view.View.performClick(View.java:5637)
at android.view.View$PerformClick.run(View.java:22429)
at android.os.Handler.handleCallback(Handler.java:751)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:154)
at android.app.ActivityThread.main(ActivityThread.java:6121)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
问题不在于我正在修改Intent，而是我相信，当Android调用我的Activity时，我在Bitmap流上分配了一些安全权限，而当我转发Intent时，我正在接受该Activity( com.android.internal.app.ChooserActivity)没有读取该流的权限，因为它是授予我的应用程序的，而不是授予com.android.internal.app.ChooserActivity的.
The issue is not that I am modifying the Intent, but, I believe, the fact that I am getting assigned some security permissions on the Bitmap stream when Android invokes my Activity, and that when I forward the Intent the recieving Activity (com.android.internal.app.ChooserActivity) doesn't have permission to read that stream, since it was granted to my app and not to com.android.internal.app.ChooserActivity.
我尝试将iCurrentIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);添加到该意图中，但这不能解决问题.
I have tried adding iCurrentIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); to the intent, but that doesn't solve the issue.
显然与意图包含ChooserActivity试图访问的流有关.如果不存在此类流，则不会发生该问题.
It is clearly related to the fact that the intent contains a stream which the ChooserActivity is trying to access. If such a stream is not present, that problem does not occur.
当我尝试将Intent发送到Pocket iCurrentIntent.setClassName("com.ideashower.readitlater.pro", "com.ideashower.readitlater.activity.AddActivity");时，也会发生这种情况；实际上，任何接收活动(Twitter，WhatsApp).
This also occurs when I try to send that Intent over to Pocket iCurrentIntent.setClassName("com.ideashower.readitlater.pro", "com.ideashower.readitlater.activity.AddActivity");; in fact, any receiving Activity (Twitter, WhatsApp).
总是相同的UID 10107试图访问流并导致崩溃，这有点奇怪，因为它看起来不是导致崩溃的接收方Activity.我之所以这样说，是因为如果我理解正确，Twitter和WhatsApp和ChooserActivity都具有不同的UID.
It's always that same UID 10107 which is trying to access the stream and causes the crash, which is a bit strange, because it makes it appear that it is not the receiving Activity which is causing the crash. I say so, because if I understood it correctly, Twitter and WhatsApp and ChooserActivity all have a different UID.
对此我该怎么办?
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更新:看起来这与Chrome发送的ClipData有关，与流无关.正在努力.
Update: It looks like this is related to ClipData which Chrome is sending along, and not the stream. Working on it.
推荐答案
我得到了这个消息(不是专门由于chrome引起的)，因为我从另一个应用程序复制/粘贴了意图构建代码.
I was getting this (not specifically due to chrome, however) because I copy/pasted intent-building code from another application.
具体地说，我有
uriToSend = FileProvider.getUriForFile(ctx, "com.mycompany.myfirstapp.fileprovider", f);
已复制到"com.mycompany.mysecondapp"中.因此，当mysecondapp尝试与"com.mycompany.myfirstapp.fileprovider"中的文件提供程序进行对话时，它试图与myfirstapp的无权访问的文件提供程序进行对话.
Copied into "com.mycompany.mysecondapp". So when mysecondapp tried to talk to the file provider at "com.mycompany.myfirstapp.fileprovider", it was trying to talk to myfirstapp's fileprovider, which it didn't have access to.
检查是否要发送到自己的文件提供程序:
Checklist if you're sending to your own fileprovider:
- 您已将fileprovider添加到Android清单
- 您的代码引用了您应用中fileprovider的URI
这篇关于Android:java.lang.SecurityException:无权访问uri 0 @ content://com.android.chrome.FileProvider/BlockedFile的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
