[path_provider] Add support to access getApplicationSupportDirectory on Android

packages/path_provider/CHANGELOG.md

@@ -1,3 +1,9 @@
+## 1.2.0
+
+* On Android, `getApplicationSupportDirectory` is now supported using `getFilesDir`.
+* `getExternalStorageDirectory` now returns `null` instead of throwing an
+  exception if no external files directory is available.
+
 ## 1.1.2
 
 * `getExternalStorageDirectory` now uses `getExternalFilesDir` on Android.

packages/path_provider/android/src/main/java/io/flutter/plugins/pathprovider/PathProviderPlugin.java

@@ -10,6 +10,7 @@
 import io.flutter.plugin.common.MethodChannel.Result;
 import io.flutter.plugin.common.PluginRegistry.Registrar;
 import io.flutter.util.PathUtils;
+import java.io.File;
 
 public class PathProviderPlugin implements MethodCallHandler {
   private final Registrar mRegistrar;
@@ -37,6 +38,8 @@ public void onMethodCall(MethodCall call, Result result) {
       case "getStorageDirectory":
         result.success(getPathProviderStorageDirectory());
         break;
+      case "getApplicationSupportDirectory":
+        result.success(getApplicationSupportDirectory());
       default:
         result.notImplemented();
     }
@@ -46,11 +49,19 @@ private String getPathProviderTemporaryDirectory() {
     return mRegistrar.context().getCacheDir().getPath();
   }
 
+  private String getApplicationSupportDirectory() {
+    return PathUtils.getFilesDir(mRegistrar.context());
+  }
+
   private String getPathProviderApplicationDocumentsDirectory() {
     return PathUtils.getDataDirectory(mRegistrar.context());
   }
 
   private String getPathProviderStorageDirectory() {
-    return mRegistrar.context().getExternalFilesDir(null).getAbsolutePath();
+    final File dir = mRegistrar.context().getExternalFilesDir(null);
+    if (dir == null) {
+      return null;
+    }
+    return dir.getAbsolutePath();
   }
 }

packages/path_provider/lib/path_provider.dart

@@ -39,15 +39,14 @@ Future<Directory> getTemporaryDirectory() async {
 /// On iOS, this uses the `NSApplicationSupportDirectory` API.
 /// If this directory does not exist, it is created automatically.
 ///
-/// On Android, this function throws an [UnsupportedError].
+/// On Android, this function uses the `getFilesDir` API on the context.
 Future<Directory> getApplicationSupportDirectory() async {
-  if (!Platform.isIOS)
-    throw UnsupportedError("getApplicationSupportDirectory requires iOS");
   final String path =
       await _channel.invokeMethod<String>('getApplicationSupportDirectory');
   if (path == null) {
     return null;
   }
+
   return Directory(path);
 }
 
@@ -58,7 +57,7 @@ Future<Directory> getApplicationSupportDirectory() async {
 /// [getApplicationSupportDirectory] instead if the data is not user-generated.
 ///
 /// On Android, this uses the `getDataDirectory` API on the context. Consider
-/// using getExternalStorageDirectory instead if data is intended to be visible
+/// using [getExternalStorageDirectory] instead if data is intended to be visible
 /// to the user.
 Future<Directory> getApplicationDocumentsDirectory() async {
   final String path =

packages/path_provider/pubspec.yaml

@@ -3,7 +3,7 @@ description: Flutter plugin for getting commonly used locations on the Android &
   iOS file systems, such as the temp and app data directories.
 author: Flutter Team <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/path_provider
-version: 1.1.2
+version: 1.2.0
 
 flutter:
   plugin: