Add extraText option for Android when sharing image or file

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

@@ -34,6 +34,7 @@ public class ShareExtendPlugin implements MethodChannel.MethodCallHandler, Plugi
     private String type;
     private String sharePanelTitle;
     private String subject;
+    private String extraText;
 
     public static void registerWith(Registrar registrar) {
         MethodChannel channel = new MethodChannel(registrar.messenger(), CHANNEL);
@@ -58,14 +59,15 @@ public class ShareExtendPlugin implements MethodChannel.MethodCallHandler, Plugi
             type = call.argument("type");
             sharePanelTitle = call.argument("sharePanelTitle");
             subject = call.argument("subject");
-            share(list, type, sharePanelTitle, subject);
+            extraText = call.argument("extraText");
+            share(list, type, sharePanelTitle, subject, extraText);
             result.success(null);
         } else {
             result.notImplemented();
         }
     }
 
-    private void share(List<String> list, String type, String sharePanelTitle, String subject) {
+    private void share(List<String> list, String type, String sharePanelTitle, String subject, String extraText) {
         ArrayList<Uri> uriList = new ArrayList<>();;
 
         if (list == null || list.isEmpty()) {
@@ -86,7 +88,7 @@ public class ShareExtendPlugin implements MethodChannel.MethodCallHandler, Plugi
                     return;
                 }
             }
-
+            shareIntent.putExtra(Intent.EXTRA_TEXT, extraText);
             for (String path : list) {
                 File f = new File(path);
                 Uri uri = ShareUtils.getUriForFile(getContext(), f);
@@ -139,7 +141,7 @@ public class ShareExtendPlugin implements MethodChannel.MethodCallHandler, Plugi
     @Override
     public boolean onRequestPermissionsResult(int requestCode, String[] perms, int[] grantResults) {
         if (requestCode == CODE_ASK_PERMISSION && grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
-            share(list, type, sharePanelTitle, subject);
+            share(list, type, sharePanelTitle, subject, extraText);
         }
         return false;
     }

lib/share_extend.dart

@@ -14,44 +14,69 @@ class ShareExtend {
   static const MethodChannel _channel =
       const MethodChannel('com.zt.shareextend/share_extend');
 
-  ///
-  /// [sharePositionOrigin] only supports ios
+  /// method to share with system ui
+  ///  It uses the ACTION_SEND Intent on Android and UIActivityViewController
+  /// on iOS.
+  /// [list] can be text or path list
+  /// [type]  "text", "image" ,"file"
+  /// [sharePositionOrigin] only supports iPad os
+  /// [sharePanelTitle] only supports android (some devices may not support)
+  /// [subject] Intent.EXTRA_SUBJECT on Android and "subject" on iOS.
+  /// [extraText] only supports android for Intent.EXTRA_TEXT when sharing image or file.
   ///
   static Future<void> shareMultiple(List<String> list, String type,
-      {Rect sharePositionOrigin, String sharePanelTitle, String subject}) {
+      {Rect sharePositionOrigin,
+      String sharePanelTitle,
+      String subject = "",
+      String extraText = ""}) {
     assert(list != null && list.isNotEmpty);
     return _shareInner(list, type,
         sharePositionOrigin: sharePositionOrigin,
         subject: subject,
-        sharePanelTitle: sharePanelTitle);
+        sharePanelTitle: sharePanelTitle,
+        extraText: extraText);
   }
 
+  /// method to share with system ui
+  ///  It uses the ACTION_SEND Intent on Android and UIActivityViewController
+  /// on iOS.
+  /// [list] can be text or path list
+  /// [type]  "text", "image" ,"file"
+  /// [sharePositionOrigin] only supports iPad os
+  /// [sharePanelTitle] only supports android (some devices may not support)
+  /// [subject] Intent.EXTRA_SUBJECT on Android and "subject" on iOS.
+  /// [extraText] only supports android for Intent.EXTRA_TEXT when sharing image or file.
+  ///
   static Future<void> share(String text, String type,
-      {Rect sharePositionOrigin, String sharePanelTitle, String subject = ""}) {
+      {Rect sharePositionOrigin,
+      String sharePanelTitle,
+      String subject = "",
+      String extraText = ""}) {
     assert(text != null);
     assert(text.isNotEmpty);
     List<String> list = [text];
-    return _shareInner(list, type,
+    return _shareInner(
+      list,
+      type,
       sharePositionOrigin: sharePositionOrigin,
       sharePanelTitle: sharePanelTitle,
-        subject: subject);
+      subject: subject,
+      extraText: extraText,
+    );
   }
 
-  /// method to share with system ui
-  ///  It uses the ACTION_SEND Intent on Android and UIActivityViewController
-  /// on iOS.
-  /// [list] can be text or path list
-  /// [type]  "text", "image" ,"file"
-  /// [sharePositionOrigin] only supports ios
-  ///
   static Future<void> _shareInner(List<String> list, String type,
-      {Rect sharePositionOrigin, String sharePanelTitle, String subject}) {
+      {Rect sharePositionOrigin,
+      String sharePanelTitle,
+      String subject,
+      String extraText}) {
     assert(list != null && list.isNotEmpty);
     final Map<String, dynamic> params = <String, dynamic>{
       'list': list,
       'type': type,
       'sharePanelTitle': sharePanelTitle,
-      'subject': subject
+      'subject': subject,
+      'extraText': extraText
     };
     if (sharePositionOrigin != null) {
       params['originX'] = sharePositionOrigin.left;