Permission Denial: writing android.support.v4.content.FilePr

Question

大家好。我有一个奇怪的问题，没有一个例子在堆栈溢出工作。我正在打开一个画廊，之后我将用户重定向到作物意图。重要的是，这只发生在android N上，而不是在android N以下的设备上。问题是，这个异常被抛出一旦作物完成，我不知道是什么原因，但实际上这是我如何开始作物意图。

 Intent cropIntent = new Intent("com.android.camera.action.CROP");
    cropIntent.addFlags(Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);

    Uri outPutUri = FileProvider.getUriForFile(activity, activity.getApplicationContext().getPackageName() + ".provider", new File(output));
    Uri photoURI = FileProvider.getUriForFile(activity, activity.getApplicationContext().getPackageName() + ".provider", new File(path));
    activity.grantUriPermission("com.android.camera.action.CROP", outPutUri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
    activity.grantUriPermission("com.android.camera.action.CROP", photoURI, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
    cropIntent.setDataAndType(photoURI, "image/*");
    cropIntent.putExtra("crop", "true");
    cropIntent.putExtra("aspectX", aspectX);
    cropIntent.putExtra("aspectY", aspectY);

    cropIntent.putExtra(MediaStore.EXTRA_OUTPUT, outPutUri);
    activity.startActivityForResult(cropIntent, CROP_REQUEST);

我已授予Uri权限，已将这些添加到manifest

  <provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="${applicationId}.provider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/provider_paths"/>

我已经尝试了所有的堆栈超过流回答的例子，没有更多的问题与这种情况下的堆栈溢出，而不是他们中的任何一个工作。那么android N到底有什么问题呢?

这是被抛出的异常

FATAL EXCEPTION: main
Process: com.android.gallery3d, PID: 5735
java.lang.SecurityException: Permission Denial: writing android.support.v4.content.FileProvider uri content://my.package.name/external_files/Android/data/my.package.name/cache/0.5062300225583558.png from pid=5735, uid=10071 requires the provider be exported, or grantUriPermission()
at android.os.Parcel.readException(Parcel.java:1683)
at android.database.DatabaseUtils.readExceptionFromParcel(DatabaseUtils.java:183)
at android.database.DatabaseUtils.readExceptionWithFileNotFoundExceptionFromParcel(DatabaseUtils.java:146)
at android.content.ContentProviderProxy.openAssetFile(ContentProviderNative.java:621)
at android.content.ContentResolver.openAssetFileDescriptor(ContentResolver.java:1000)
at android.content.ContentResolver.openOutputStream(ContentResolver.java:742)
at android.content.ContentResolver.openOutputStream(ContentResolver.java:718)
at com.android.gallery3d.filtershow.crop.CropActivity$BitmapIOTask.<init>(CropActivity.java:408)
at com.android.gallery3d.filtershow.crop.CropActivity.startBitmapIO(CropActivity.java:339)
at com.android.gallery3d.filtershow.crop.CropActivity.startFinishOutput(CropActivity.java:311)
at com.android.gallery3d.filtershow.crop.CropActivity$1.onClick(CropActivity.java:117)
at android.view.View.performClick(View.java:5610)
at android.view.View$PerformClick.run(View.java:22260)
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:6077)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)
09-30 13:19:44.376 11909-11942/volo.global.pingbing E/FA: Task exception on worker thread: java.lang.IncompatibleClassChangeError: The method 'java.io.File android.support.v4.content.ContextCompat.getNoBackupFilesDir(android.content.Context)' was expected to be of type virtual but instead was found to be of type direct (declaration of 'com.google.firebase.iid.zzg' appears in /data/app/volo.global.pingbing-1/base.apk): com.google.android.gms.measurement.internal.zzt.zzEd(Unknown Source)

Answer 1

List<ResolveInfo> resInfoList = getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
        for (ResolveInfo resolveInfo : resInfoList) {
            String packageName = resolveInfo.activityInfo.packageName;
            grantUriPermission(packageName, photoURI, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
        }

Answer 2

首先，Android没有CROP Intent。Android上有很多图像裁剪库。使用一个.

第二，grantUriPermissions()的第一个参数不是一个动作字符串或一些随机的字符序列。它是一个应用程序ID(也就是包名)。com.android.camera.action.CROP不是包名

Answer 3

你应该加上这句话:grantUriPermission();像

this:grantUriPermission("com.google.android.apps.photos",cropedImageUri,Intent.FLAG_GRANT_WRITE_URI_PERMISSION);

我的错误是这样的。