[quick_actions] Implementing sharedpreferences approach for killed apps (flutter#1800)

* Implementing "intent extras" approach instead of shared preferences as suggested

* Added some tests
Method renaming
Added ios placeholder for getLaunchAction method

Author: diesersamat

packages/quick_actions/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.3.2
+
+* Fixed the quick actions launch on Android when the app is killed. 
+
 ## 0.3.1
 
 * Added unit tests.

packages/quick_actions/android/src/main/AndroidManifest.xml

@@ -1,7 +1,12 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-  package="io.flutter.plugins.quickactions">
+    xmlns:tools="http://schemas.android.com/tools"
+    package="io.flutter.plugins.quickactions">
 
-  <application>
-    <activity android:name=".QuickActionsPlugin$ShortcutHandlerActivity" android:exported="false"/>
-  </application>
+    <application>
+        <activity
+            android:name=".QuickActionsPlugin$ShortcutHandlerActivity"
+            android:exported="false"
+            android:relinquishTaskIdentity="true"
+            tools:targetApi="lollipop" />
+    </application>
 </manifest>

packages/quick_actions/android/src/main/java/io/flutter/plugins/quickactions/QuickActionsPlugin.java

@@ -26,6 +26,8 @@
 @SuppressWarnings("unchecked")
 public class QuickActionsPlugin implements MethodCallHandler {
   private final Registrar registrar;
+  private static final String intentExtraAction = "action";
+  private static String launchAction = null;
 
   // Channel is a static field because it needs to be accessible to the
   // {@link ShortcutHandlerActivity} which has to be a static class with
@@ -45,6 +47,7 @@ private QuickActionsPlugin(Registrar registrar) {
   public static void registerWith(Registrar registrar) {
     channel = new MethodChannel(registrar.messenger(), "plugins.flutter.io/quick_actions");
     channel.setMethodCallHandler(new QuickActionsPlugin(registrar));
+    launchAction = registrar.activity().getIntent().getStringExtra(intentExtraAction);
   }
 
   @Override
@@ -68,6 +71,10 @@ public void onMethodCall(MethodCall call, Result result) {
       case "clearShortcutItems":
         shortcutManager.removeAllDynamicShortcuts();
         break;
+      case "getLaunchAction":
+        result.success(launchAction);
+        launchAction = null;
+        return;
       default:
         result.notImplemented();
         return;
@@ -117,8 +124,27 @@ protected void onCreate(Bundle savedInstanceState) {
       String type = intent.getStringExtra("type");
       if (channel != null) {
         channel.invokeMethod("launch", type);
+      } else {
+        startActivity(getIntentToOpenMainActivity(this, type));
       }
       finish();
     }
+
+    /**
+     * Returns Intent to launch the MainActivity. Used to start the app, if one of quick actions was
+     * called from the background.
+     */
+    private Intent getIntentToOpenMainActivity(Context context, String type) {
+      Intent launchIntentForPackage =
+          context
+              .getPackageManager()
+              .getLaunchIntentForPackage(context.getApplicationContext().getPackageName());
+      if (launchIntentForPackage == null) {
+        return null;
+      } else {
+        launchIntentForPackage.putExtra(intentExtraAction, type);
+        return launchIntentForPackage;
+      }
+    }
   }
 }

packages/quick_actions/ios/Classes/QuickActionsPlugin.m

@@ -28,6 +28,8 @@ - (void)handleMethodCall:(FlutterMethodCall *)call result:(FlutterResult)result
   } else if ([call.method isEqualToString:@"clearShortcutItems"]) {
     [UIApplication sharedApplication].shortcutItems = @[];
     result(nil);
+  } else if ([call.method isEqualToString:@"getLaunchAction"]) {
+    result(nil);
   } else {
     result(FlutterMethodNotImplemented);
   }

packages/quick_actions/lib/quick_actions.dart

@@ -49,11 +49,19 @@ class QuickActions {
   /// Initializes this plugin.
   ///
   /// Call this once before any further interaction with the the plugin.
-  void initialize(QuickActionHandler handler) {
+  void initialize(QuickActionHandler handler) async {
     channel.setMethodCallHandler((MethodCall call) async {
       assert(call.method == 'launch');
       handler(call.arguments);
     });
+    runLaunchAction(handler);
+  }
+
+  void runLaunchAction(QuickActionHandler handler) async {
+    final String action = await channel.invokeMethod<String>('getLaunchAction');
+    if (action != null) {
+      handler(action);
+    }
   }
 
   /// Sets the [ShortcutItem]s to become the app's quick actions.

packages/quick_actions/pubspec.yaml

@@ -3,7 +3,7 @@ description: Flutter plugin for creating shortcuts on home screen, also known as
   Quick Actions on iOS and App Shortcuts on Android.
 author: Flutter Team <flutter-dev@googlegroups.com>
 homepage: https://github.com/flutter/plugins/tree/master/packages/quick_actions
-version: 0.3.1
+version: 0.3.2
 
 flutter:
   plugin:

packages/quick_actions/test/quick_actions_test.dart

@@ -54,5 +54,17 @@ void main() {
         isMethodCall('clearShortcutItems', arguments: null),
       ],
     );
+    log.clear();
+  });
+
+  test('runLaunchAction', () {
+    quickActions.runLaunchAction(null);
+    expect(
+      log,
+      <Matcher>[
+        isMethodCall('getLaunchAction', arguments: null),
+      ],
+    );
+    log.clear();
   });
 }