使用Android中的新Intent在FileProvider中打开公共存储中的.DocX文件时出错

Question

Word和Docs都不会打开文件。 Word给出“尝试在设备上保存文件”错误，并且在文档日志中看到Java权限错误。

文件被写入公共图片文件夹，如果手动导航到文件，则可以从设备上的Word中打开它们，但是用户应该能够单击.Doc徽标并从中打开文件该应用程序。我添加了权限标志，但仍然没有运气。

路径：

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

清单中的内部应用程序标签

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

打开新意图的主要功能（Word或Docs）

var filename = "AFileName"
var localPhotoPath = System.IO.Path.Combine(global::Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryPictures).AbsolutePath, "workOrder");
                localPhotoPath = System.IO.Path.Combine(localPhotoPath, "filename");
                if (filename.Contains(".docx"))
                {
                    Intent viewIntent = new Intent(Intent.ActionEdit);
                    //viewIntent.SetAction();
                    Java.IO.File exportFile = new Java.IO.File(localPhotoPath);
                    exportFile.SetReadable(true);
                    var photoURI = FileProvider.GetUriForFile(Application.Context, "com.company.app.fileprovider", exportFile);

                    viewIntent.SetDataAndType(photoURI, "application/vnd.openxmlformats-officedocument.wordprocessingml.document");
                    viewIntent.AddFlags(ActivityFlags.GrantReadUriPermission);
                    viewIntent.AddFlags(ActivityFlags.GrantWriteUriPermission);
                    viewIntent.AddFlags(ActivityFlags.NewTask);
                    var resolved = PackageManager.QueryIntentActivities(viewIntent, 0);

                    if (resolved != null && resolved.Count > 0)
                    {
                        foreach (var t in resolved)
                        {
                            Application.Context.GrantUriPermission(t.ActivityInfo.PackageName, photoURI, ActivityFlags.GrantReadUriPermission);
                            StartActivity(viewIntent);
                        }
                        StartActivity(viewIntent);
                    }
                    else
                    {
                        // notify the user they can't open it.
                    }
                }

Answer 1

因此，事实证明，拥有两个提供程序将not起作用，而删除无关的提供程序则可以解决此问题。我将在这里发布适用于遇到此问题的任何人的工作代码。

路径是相同的，因为我们将它们保存到外部公用文件夹。

在Android清单中：

    <application android:allowBackup="true" android:icon="@mipmap/VamsLauncher" android:label="@string/app_name" android:roundIcon="@mipmap/VamsLauncher" android:supportsRtl="true" android:theme="@style/AppTheme">
    <provider android:name="android.support.v4.content.FileProvider" android:authorities="${applicationId}.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>

在新应用中打开文件的功能

                Intent viewIntent = new Intent(Intent.ActionView);
                //viewIntent.SetAction();
                Java.IO.File exportFile = new Java.IO.File(localPhotoPath);
                exportFile.SetReadable(true);
                var photoURI = FileProvider.GetUriForFile(Application.Context, Application.Context.ApplicationContext.PackageName + ".fileprovider", exportFile);

                viewIntent.SetDataAndType(photoURI, "application/vnd.openxmlformats-officedocument.wordprocessingml.document");
                viewIntent.AddFlags(ActivityFlags.NewTask);
                viewIntent.AddFlags(ActivityFlags.GrantReadUriPermission);
                viewIntent.AddFlags(ActivityFlags.GrantWriteUriPermission);
                var resolved = PackageManager.QueryIntentActivities(viewIntent, 0);

                if (resolved != null && resolved.Count > 0)
                {
                    foreach (var t in resolved)
                    {
                        Application.Context.GrantUriPermission(t.ActivityInfo.PackageName, photoURI, ActivityFlags.GrantReadUriPermission);

                    }
                    StartActivity(viewIntent);
                }
                else
                {
                    // notify the user they can't open it.
                }