add: LICENSE, ui mode

app/src/main/java/com/stardust/scriptdroid/App.java

@@ -1,6 +1,8 @@
 package com.stardust.scriptdroid;
 
+import android.app.Activity;
 import android.app.Application;
+import android.os.Bundle;
 import android.preference.PreferenceManager;
 
 import com.stardust.util.CrashHandler;
@@ -14,6 +16,7 @@ public class App extends Application {
 
     private static App instance;
     private static StateObserver stateObserver;
+    private static Activity currentActivity;
 
     public static App getApp() {
         return instance;
@@ -26,8 +29,69 @@ public class App extends Application {
 
     public void onCreate() {
         super.onCreate();
-        Thread.currentThread().setUncaughtExceptionHandler(new CrashHandler(ErrorReportActivity.class));
+        Thread.setDefaultUncaughtExceptionHandler(new CrashHandler(ErrorReportActivity.class));
         instance = this;
         stateObserver = new StateObserver(PreferenceManager.getDefaultSharedPreferences(this));
+        registerActivityLifecycleCallbacks(new SimpleActivityLifecycleCallbacks() {
+            @Override
+            public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
+                currentActivity = activity;
+            }
+
+
+            @Override
+            public void onActivityPaused(Activity activity) {
+                currentActivity = null;
+            }
+
+            @Override
+            public void onActivityResumed(Activity activity) {
+                currentActivity = activity;
+            }
+
+        });
+    }
+
+    public static Activity currentActivity() {
+        return currentActivity;
+    }
+
+
+    private static class SimpleActivityLifecycleCallbacks implements ActivityLifecycleCallbacks {
+
+        @Override
+        public void onActivityCreated(Activity activity, Bundle savedInstanceState) {
+
+        }
+
+        @Override
+        public void onActivityStarted(Activity activity) {
+
+        }
+
+        @Override
+        public void onActivityResumed(Activity activity) {
+
+        }
+
+        @Override
+        public void onActivityPaused(Activity activity) {
+
+        }
+
+        @Override
+        public void onActivityStopped(Activity activity) {
+
+        }
+
+        @Override
+        public void onActivitySaveInstanceState(Activity activity, Bundle outState) {
+
+        }
+
+        @Override
+        public void onActivityDestroyed(Activity activity) {
+
+        }
     }
 }