adds support for any type of file;

fixes permission ask recursive loop;

android/.idea/modules.xml

@@ -3,6 +3,7 @@
   <component name="ProjectModuleManager">
     <modules>
       <module fileurl="file://$PROJECT_DIR$/file_picker.iml" filepath="$PROJECT_DIR$/file_picker.iml" />
+      <module fileurl="file://$PROJECT_DIR$/file_picker.iml" filepath="$PROJECT_DIR$/file_picker.iml" />
     </modules>
   </component>
 </project>

android/src/main/java/com/mr/flutter/plugin/filepicker/FilePickerPlugin.java

@@ -31,6 +31,7 @@ public class FilePickerPlugin implements MethodCallHandler {
   private static final String permission = Manifest.permission.WRITE_EXTERNAL_STORAGE;
   private static Result result;
   private static Registrar instance;
+  private static String fileType;
 
   /** Plugin registration. */
   public static void registerWith(Registrar registrar) {
@@ -41,6 +42,7 @@ public class FilePickerPlugin implements MethodCallHandler {
     instance.addActivityResultListener(new PluginRegistry.ActivityResultListener() {
       @Override
       public boolean onActivityResult(int requestCode, int resultCode, Intent data) {
+
         if (requestCode == REQUEST_CODE && resultCode == Activity.RESULT_OK) {
 
           if (data != null) {
@@ -88,47 +90,77 @@ public class FilePickerPlugin implements MethodCallHandler {
         return false;
       }
     });
+
+    instance.addRequestPermissionsResultListener(new PluginRegistry.RequestPermissionsResultListener() {
+      @Override
+      public boolean onRequestPermissionsResult(int requestCode, String[] strings, int[] grantResults) {
+        if (requestCode == 0 && grantResults.length > 0
+                && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+          startFileExplorer(fileType);
+          return true;
+        }
+        return false;
+      }
+    });
   }
 
   @Override
   public void onMethodCall(MethodCall call, Result result) {
-    if (call.method.equals("pickPDF")) {
+    this.result = result;
-      this.result = result;
+    fileType = resolveType(call.method);
-      startFileExplorer();
+
-    } else {
+    if(fileType == null){
       result.notImplemented();
+    } else {
+      startFileExplorer(fileType);
     }
+
   }
 
-  private boolean checkPermission() {
+  private static boolean checkPermission() {
     Activity activity = instance.activity();
     Log.i(TAG, "Checking permission: " + permission);
     return PackageManager.PERMISSION_GRANTED == ContextCompat.checkSelfPermission(activity, permission);
   }
 
-  private void requestPermission() {
+  private static void requestPermission() {
+
     Activity activity = instance.activity();
     Log.i(TAG, "Requesting permission: " + permission);
     String[] perm = { permission };
     ActivityCompat.requestPermissions(activity, perm, 0);
   }
 
-  private void startFileExplorer() {
+  private String resolveType(String type) {
+
+    switch (type){
+      case "PDF":
+        return "application/pdf";
+      case "ANY":
+        return "*/*";
+      default:
+        return null;
+    }
+  }
+
+
+
+
+  private static void startFileExplorer(String type) {
     Intent intent;
 
     if (checkPermission()) {
       if(Build.VERSION.SDK_INT < Build.VERSION_CODES.KITKAT){
         intent = new Intent(Intent.ACTION_PICK);
-      }else{
+      } else {
-        intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
+        intent = new Intent(Intent.ACTION_GET_CONTENT);
       }
 
-      intent.setType("application/pdf");
+      intent.setType(type);
       intent.addCategory(Intent.CATEGORY_OPENABLE);
       instance.activity().startActivityForResult(intent, REQUEST_CODE);
     } else {
       requestPermission();
-      startFileExplorer();
     }
   }
 

example/ios/Runner.xcodeproj/project.pbxproj

@@ -182,6 +182,7 @@
 				TargetAttributes = {
 					97C146ED1CF9000F007C117D = {
 						CreatedOnToolsVersion = 7.3.1;
+						DevelopmentTeam = KJ6ARNKBG8;
 					};
 				};
 			};
@@ -428,6 +429,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				DEVELOPMENT_TEAM = KJ6ARNKBG8;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
@@ -439,7 +441,7 @@
 					"$(inherited)",
 					"$(PROJECT_DIR)/Flutter",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = com.mr.flutter.plugin.filePickerExample;
+				PRODUCT_BUNDLE_IDENTIFIER = com.mr.flutter.plugin.filePickerExamples;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				VERSIONING_SYSTEM = "apple-generic";
 			};
@@ -451,6 +453,7 @@
 			buildSettings = {
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CURRENT_PROJECT_VERSION = "$(FLUTTER_BUILD_NUMBER)";
+				DEVELOPMENT_TEAM = KJ6ARNKBG8;
 				ENABLE_BITCODE = NO;
 				FRAMEWORK_SEARCH_PATHS = (
 					"$(inherited)",
@@ -462,7 +465,7 @@
 					"$(inherited)",
 					"$(PROJECT_DIR)/Flutter",
 				);
-				PRODUCT_BUNDLE_IDENTIFIER = com.mr.flutter.plugin.filePickerExample;
+				PRODUCT_BUNDLE_IDENTIFIER = com.mr.flutter.plugin.filePickerExamples;
 				PRODUCT_NAME = "$(TARGET_NAME)";
 				VERSIONING_SYSTEM = "apple-generic";
 			};

example/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

example/ios/Runner/Info.plist

@@ -4,15 +4,8 @@
 <dict>
 	<key>CFBundleDevelopmentRegion</key>
 	<string>en</string>
-	
 	<key>CFBundleExecutable</key>
 	<string>$(EXECUTABLE_NAME)</string>
-	<key>NSCameraUsageDescription</key>
-	<string>Used to demonstrate image picker plugin</string>
-	<key>NSMicrophoneUsageDescription</key>
-	<string>Used to capture audio for image picker plugin</string>
-	<key>NSPhotoLibraryUsageDescription</key>
-	<string>Used to demonstrate image picker plugin</string>
 	<key>CFBundleIdentifier</key>
 	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
 	<key>CFBundleInfoDictionaryVersion</key>
@@ -29,6 +22,12 @@
 	<string>$(FLUTTER_BUILD_NUMBER)</string>
 	<key>LSRequiresIPhoneOS</key>
 	<true/>
+	<key>NSCameraUsageDescription</key>
+	<string>Used to demonstrate image picker plugin</string>
+	<key>NSMicrophoneUsageDescription</key>
+	<string>Used to capture audio for image picker plugin</string>
+	<key>NSPhotoLibraryUsageDescription</key>
+	<string>Used to demonstrate image picker plugin</string>
 	<key>UILaunchStoryboardName</key>
 	<string>LaunchScreen</string>
 	<key>UIMainStoryboardFile</key>

example/lib/main.dart

@@ -11,8 +11,8 @@ class MyApp extends StatefulWidget {
 }
 
 class _MyAppState extends State<MyApp> {
-  String _path = '...';
   String _fileName = '...';
+  String _path = '...';
   FileType _pickingType;
 
   void _openFileExplorer() async {
@@ -63,6 +63,10 @@ class _MyAppState extends State<MyApp> {
                   new DropdownMenuItem(
                     child: new Text('FROM PDF'),
                     value: FileType.PDF,
+                  ),
+                  new DropdownMenuItem(
+                    child: new Text('ANY'),
+                    value: FileType.ANY,
                   )
                 ],
                 onChanged: (value) {
@@ -85,7 +89,7 @@ class _MyAppState extends State<MyApp> {
               style: new TextStyle(fontWeight: FontWeight.bold),
             ),
             new Text(
-              _path,
+              _path ?? '...',
               textAlign: TextAlign.center,
               softWrap: true,
               textScaleFactor: 0.85,

lib/file_picker.dart

@@ -2,12 +2,18 @@ import 'dart:async';
 
 import 'package:flutter/services.dart';
 import 'package:image_picker/image_picker.dart';
-import 'package:meta/meta.dart';
+
+enum FileType {
+  ANY,
+  PDF,
+  IMAGE,
+  CAPTURE,
+}
 
 class FilePicker {
   static const MethodChannel _channel = const MethodChannel('file_picker');
 
-  static Future<String> get _getPDF async => await _channel.invokeMethod('pickPDF');
+  static Future<String> _getPath(String type) async => await _channel.invokeMethod(type);
 
   static Future<String> _getImage(ImageSource type) async {
     var image = await ImagePicker.pickImage(source: type);
@@ -15,21 +21,16 @@ class FilePicker {
     return image?.path;
   }
 
-  static Future<String> getFilePath({@required FileType type}) async {
+  static Future<String> getFilePath({FileType type = FileType.ANY}) async {
     switch (type) {
       case FileType.PDF:
-        return _getPDF;
+        return _getPath('PDF');
       case FileType.IMAGE:
         return _getImage(ImageSource.gallery);
       case FileType.CAPTURE:
         return _getImage(ImageSource.camera);
+      default:
+        return _getPath('ANY');
     }
-    return '';
   }
 }
-
-enum FileType {
-  PDF,
-  IMAGE,
-  CAPTURE,
-}