add grant uri permission on Android

android/src/main/java/com/zt/shareextend/ShareExtendPlugin.java

 package com.zt.shareextend;
 
 import android.Manifest;
+import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
@@ -72,7 +73,6 @@ public class ShareExtendPlugin implements MethodChannel.MethodCallHandler, Plugi
         shareIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
         shareIntent.putExtra(Intent.EXTRA_SUBJECT, subject);
 
-        ArrayList<Uri> uriList = new ArrayList<>();
         if ("text".equals(type)) {
             shareIntent.setAction(Intent.ACTION_SEND);
             shareIntent.putExtra(Intent.EXTRA_TEXT, list.get(0));
@@ -85,9 +85,10 @@ public class ShareExtendPlugin implements MethodChannel.MethodCallHandler, Plugi
                 }
             }
 
+            ArrayList<Uri> uriList = new ArrayList<>();
             for (String path : list) {
                 File f = new File(path);
-                Uri uri = ShareUtils.getUriForFile(mRegistrar.activity(), f);
+                Uri uri = ShareUtils.getUriForFile(getContext(), f);
                 uriList.add(uri);
             }
 
@@ -105,18 +106,18 @@ public class ShareExtendPlugin implements MethodChannel.MethodCallHandler, Plugi
                 shareIntent.setAction(Intent.ACTION_SEND_MULTIPLE);
                 shareIntent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uriList);
             }
+            ShareUtils.grantUriPermission(getContext(), uriList, shareIntent);
         }
-        startChooserActivity(uriList.get(0), shareIntent, sharePanelTitle);
+        startChooserActivity(shareIntent, sharePanelTitle);
     }
 
-    private void startChooserActivity(Uri uri, Intent shareIntent,String sharePanelTitle) {
-        Intent chooserIntent = Intent.createChooser(shareIntent, sharePanelTitle /* dialog subject optional */);
-        if (mRegistrar.activity() != null) {
-            List<ResolveInfo> resInfoList = mRegistrar.activity().getPackageManager().queryIntentActivities(chooserIntent, PackageManager.MATCH_DEFAULT_ONLY);
-            for (ResolveInfo resolveInfo : resInfoList) {
-                String packageName = resolveInfo.activityInfo.packageName;
-                mRegistrar.activity().grantUriPermission(packageName, uri, Intent.FLAG_GRANT_WRITE_URI_PERMISSION | Intent.FLAG_GRANT_READ_URI_PERMISSION);
+    private Context getContext() {
+        return mRegistrar.activity() != null ? mRegistrar.activity() : mRegistrar.context();
     }
+
+    private void startChooserActivity(Intent shareIntent, String sharePanelTitle) {
+        Intent chooserIntent = Intent.createChooser(shareIntent, sharePanelTitle);
+        if (mRegistrar.activity() != null) {
             mRegistrar.activity().startActivity(chooserIntent);
         } else {
             chooserIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

android/src/main/java/com/zt/shareextend/ShareUtils.java

 package com.zt.shareextend;
 
 import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Environment;
@@ -26,6 +29,14 @@ class ShareUtils {
         return uri;
     }
 
+    static void grantUriPermission(Context context, List<Uri> uriList, Intent intent) {
+        for (Uri uri : uriList) {
+            List<ResolveInfo> resolveInfos = context.getPackageManager().queryIntentActivities(intent, PackageManager.MATCH_DEFAULT_ONLY);
+            for (ResolveInfo resolveInfo : resolveInfos) {
+                context.grantUriPermission(resolveInfo.activityInfo.packageName, uri, Intent.FLAG_GRANT_READ_URI_PERMISSION | Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
+            }
+        }
+    }
 
     static boolean shouldRequestPermission(List<String> pathList) {
         for (String path : pathList) {