[Android] AppState

Author: skv-headless

Examples/UIExplorer/UIExplorerList.android.js

@@ -42,6 +42,7 @@ var COMPONENTS = [
 var APIS = [
   require('./AccessibilityAndroidExample.android'),
   require('./AlertExample').AlertExample,
+  require('./AppStateIOSExample'),
   require('./BorderExample'),
   require('./ClipboardExample'),
   require('./GeolocationExample'),

Libraries/AppStateIOS/AppStateIOS.android.js

@@ -0,0 +1,73 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+package com.facebook.react.modules.appstate;
+
+import com.facebook.react.bridge.Arguments;
+import com.facebook.react.bridge.Callback;
+import com.facebook.react.bridge.LifecycleEventListener;
+import com.facebook.react.bridge.ReactApplicationContext;
+import com.facebook.react.bridge.ReactContext;
+import com.facebook.react.bridge.ReactContextBaseJavaModule;
+import com.facebook.react.bridge.ReactMethod;
+import com.facebook.react.bridge.WritableMap;
+
+import static com.facebook.react.modules.core.DeviceEventManagerModule.RCTDeviceEventEmitter;
+
+public class AppStateModule extends ReactContextBaseJavaModule
+        implements LifecycleEventListener {
+
+  private ReactContext mReactContext;
+  private String mCurrentState = "background";
+
+  public AppStateModule(ReactApplicationContext context) {
+    super(context);
+    mReactContext = context;
+  }
+
+  @Override
+  public String getName() {
+    return "AppState";
+  }
+
+  @Override
+  public void initialize() {
+    getReactApplicationContext().addLifecycleEventListener(this);
+  }
+
+  @ReactMethod
+  public void getCurrentAppState(Callback success, Callback error) {
+    success.invoke(createAppStateEventMap());
+  }
+
+  @Override
+  public void onHostResume() {
+    mCurrentState = "active";
+    getReactApplicationContext().getJSModule(RCTDeviceEventEmitter.class)
+            .emit("appStateDidChange", createAppStateEventMap());
+  }
+
+  @Override
+  public void onHostPause() {
+    mCurrentState = "background";
+    getReactApplicationContext().getJSModule(RCTDeviceEventEmitter.class)
+            .emit("appStateDidChange", createAppStateEventMap());
+  }
+
+  @Override
+  public void onHostDestroy() {
+
+  }
+
+  private WritableMap createAppStateEventMap() {
+    WritableMap appState = Arguments.createMap();
+    appState.putString("app_state", mCurrentState);
+    return appState;
+  }
+}

Libraries/AppStateIOS/AppStateIOS.ios.js renamed to Libraries/AppStateIOS/AppStateIOS.js

@@ -25,6 +25,7 @@
 import com.facebook.react.modules.network.NetworkingModule;
 import com.facebook.react.modules.storage.AsyncStorageModule;
 import com.facebook.react.modules.toast.ToastModule;
+import com.facebook.react.modules.appstate.AppStateModule;
 import com.facebook.react.modules.websocket.WebSocketModule;
 import com.facebook.react.uimanager.ViewManager;
 import com.facebook.react.views.art.ARTRenderableViewManager;
@@ -64,6 +65,7 @@ public List<NativeModule> createNativeModules(ReactApplicationContext reactConte
       new LocationModule(reactContext),
       new NetworkingModule(reactContext),
       new NetInfoModule(reactContext),
+      new AppStateModule(reactContext),
       new WebSocketModule(reactContext),
       new ToastModule(reactContext));
   }