Merge pull request #91 from UnityTech/xwzhu

Android SAFE AREA + KEYBOARD SHOW/HIDE EVENT LISTENER

README-ZH.md

 1. 选择**File** > **Build Settings...**打开Build Settings面板。
 2. 选择目标平台，点击Build。 之后Unity编辑器将自动组装所有相关资源并生成最终的应用程序包。
 
-#### 如何加载图像？
+#### 五、如何加载图像？
 1. 将你的图像文件，如image1.png，放在Resources文件夹中。
 2. 你可以在同一文件夹中添加image1@2.png和image1@3.png以支持高清屏幕显示。
 3. 使用Image.asset（“image1”）加载图像。 注意：因为是在Unity中，所以不需要添加.png后缀。
 1. 假设你有一个loading1.gif文件，将其重命名为loading1.gif.bytes并复制到Resources文件夹。
 2. 你可以在同一文件夹中添加loading1@2.gif.bytes和loading1@3.gif.bytes以支持高清屏幕显示。
 3. 使用Image.asset（“loading1.gif”）加载gif图像。
+
+#### 六、在安卓上显示状态栏
+当一个Unity项目运行在Android设备上时，状态栏是默认隐藏且无法在编辑内进行调整的。
+如果您希望在您的UIWidgets App中显示状态栏，您可以使用这个[解决方案](https://github.com/Over17/UnityShowAndroidStatusBar)。我们将尽快推出我们自己的解决方案，并保证届时开发者可以进行无缝切换。
+
 
 
 ## 调试UIWidgets应用程序

README.md

 you need to enclose them with window scope. 
 Please see [HttpRequestSample](./Samples/UIWidgetSample/HttpRequestSample.cs) for detail.
 For callback/event handler methods from UIWidgets (e.g ```Widget.build, State.initState...```), you don't need do
-it yourself, since the framework ensure it's in window scope. 
+it yourself, since the framework ensure it's in window scope.
+
+#### Show Status Bar on Android
+Status bar is always hidden by default when an Unity project is running on an Android device. If you
+ want to show the status bar in your App, this
+ [solution](https://github.com/Over17/UnityShowAndroidStatusBar) seems to be 
+ compatible to UIWidgets, therefore can be used as a good option before we release our
+ full support solution on this issue.
+
+ 
 ## Debug UIWidgets Application
 
 #### Define UIWidgets_DEBUG

Runtime/Plugins/platform/ios/UIWidgetsViewController.mm

         padding.top = cur_padding;
     }
 
-    UIWidgetsMethodMessage(@"ViewportMatricsChanged", @"UIWidgetViewController.keyboardHide", @[]);
+    UIWidgetsMethodMessage(@"ViewportMatricsChanged", @"UIWidgetViewController.keyboardChanged", @[]);
 }
 
 -(void)keyboardWillChangeFrame:(NSNotification*)notification {
     viewInsets.bottom = bottom * scale;
     padding.bottom = 0;
 
-    UIWidgetsMethodMessage(@"ViewportMatricsChanged", @"UIWidgetViewController.keyboardHide", @[]);
+    UIWidgetsMethodMessage(@"ViewportMatricsChanged", @"UIWidgetViewController.keyboardChanged", @[]);
 }
 
 -(void)tryLaunch {

Runtime/engine/DisplayMetrics.cs

 using UnityEngine;
 
 namespace Unity.UIWidgets.engine {
-
     [StructLayout(LayoutKind.Sequential)]
     public struct viewMetrics {
         public float insets_top;
         void OnGUI();
         void Update();
 
-        float devicePixelRatio { get; } 
-        
+        float devicePixelRatio { get; }
+
-        
+
-    public class PlayerDisplayMetrics: DisplayMetrics {
-        
+    public class PlayerDisplayMetrics : DisplayMetrics {
         float _devicePixelRatio = 0;
         viewMetrics? _viewMetrics = null;
 
         public void OnGUI() {
-            
         }
 
         public void Update() {
                     return this._devicePixelRatio;
                 }
 
-#if UNITY_ANDROID 
+#if UNITY_ANDROID
-                
-#if UNITY_WEBGL 
+
+#if UNITY_WEBGL
-                
-#if UNITY_IOS 
+
+#if UNITY_IOS
                 this._devicePixelRatio = IOSDeviceScaleFactor();
 #endif
 
 
                 return this._devicePixelRatio;
             }
-            
-            get { 
+            get {
-                this.viewMetrics.padding_top,
-                this.viewMetrics.padding_right,
-                this.viewMetrics.padding_bottom);
+                    this.viewMetrics.padding_top,
+                    this.viewMetrics.padding_right,
+                    this.viewMetrics.padding_bottom);
-        
-        public WindowPadding viewInsets { 
-            get { 
-            return new WindowPadding(this.viewMetrics.insets_left,
-                this.viewMetrics.insets_top,
-                this.viewMetrics.insets_right,
-                this.viewMetrics.insets_bottom);
-            } 
+
+        public WindowPadding viewInsets {
+            get {
+                return new WindowPadding(this.viewMetrics.insets_left,
+                    this.viewMetrics.insets_top,
+                    this.viewMetrics.insets_right,
+                    this.viewMetrics.insets_bottom);
+            }
         }
 
         public viewMetrics viewMetrics {
                 }
-                
+
-                this._viewMetrics = new viewMetrics {
-                    insets_bottom = 0,
-                    insets_left = 0,
-                    insets_right = 0,
-                    insets_top = 0,
-                    padding_left = Screen.safeArea.x,
-                    padding_top = Screen.safeArea.y,
-                    padding_right = Screen.width - Screen.safeArea.width - Screen.safeArea.x,
-                    padding_bottom = Screen.height - Screen.safeArea.height - Screen.safeArea.y
-                };
+
+                using (
+                    AndroidJavaClass viewController =
+                        new AndroidJavaClass("com.unity.uiwidgets.plugin.UIWidgetsViewController")
+                ) {
+                    AndroidJavaObject metrics = viewController.CallStatic<AndroidJavaObject>("getMetrics");
+                    float insets_bottom = metrics.Get<float>("insets_bottom");
+                    float insets_top = metrics.Get<float>("insets_top");
+                    float insets_left = metrics.Get<float>("insets_left");
+                    float insets_right = metrics.Get<float>("insets_right");
+                    float padding_bottom = metrics.Get<float>("padding_bottom");
+                    float padding_top = metrics.Get<float>("padding_top");
+                    float padding_left = metrics.Get<float>("padding_left");
+                    float padding_right = metrics.Get<float>("padding_right");
+
+                    this._viewMetrics = new viewMetrics {
+                        insets_bottom = insets_bottom,
+                        insets_left = insets_left,
+                        insets_right = insets_right,
+                        insets_top = insets_top,
+                        padding_left = padding_left,
+                        padding_top = padding_top,
+                        padding_right = padding_right,
+                        padding_bottom = padding_bottom
+                    };
+                }
 #elif UNITY_WEBGL
                 this._viewMetrics = new viewMetrics {
                     insets_bottom = 0,
             }
         }
 
-#if UNITY_ANDROID 
+#if UNITY_ANDROID
         static float AndroidDevicePixelRatio() {
             using (
                 AndroidJavaClass unityPlayerClass = new AndroidJavaClass("com.unity3d.player.UnityPlayer")
 		[DllImport("__Internal")]
 		static extern viewMetrics IOSGetViewportPadding();
 #endif
-
     }
 }

Runtime/engine/UIWidgetsPanel.cs

 
         protected override void OnEnable() {
             base.OnEnable();
+            
+            
+#if UNITY_ANDROID
+            Screen.fullScreen = false;
+#endif
             //Disable the default touch -> mouse event conversion on mobile devices
             Input.simulateMouseWithTouches = false;
 

Runtime/Plugins/platform/android/view.meta

+fileFormatVersion: 2
+guid: 33b91e29c97a04d1cb40bd11039c8078
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Plugins/platform/android/view/UIWidgetsViewController.java

+package com.unity.uiwidgets.plugin;
+
+import android.util.Log;
+
+import com.unity3d.player.UnityPlayer;
+import android.graphics.Rect;
+import android.os.Build;
+import android.util.Log;
+import android.util.TypedValue;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.ViewTreeObserver;
+import android.app.Activity;
+import android.content.res.Configuration;
+import android.view.Surface;
+import java.util.Arrays;
+import android.view.WindowManager;
+import android.os.Handler;
+
+public class UIWidgetsViewController {
+
+    private static UIWidgetsViewController _instance;
+
+    public static UIWidgetsViewController getInstance() {
+        if (_instance == null) {
+            _instance = new UIWidgetsViewController();
+            _instance.setup();
+        }
+        return _instance;
+    }
+    
+    private UIWidgetsViewMetrics viewMetrics;
+    private boolean keyboardOpen;
+    
+    private void setup() {
+        Log.i("tag", "On Setup");
+        
+        keyboardOpen = false;
+        viewMetrics = new UIWidgetsViewMetrics();
+        
+        updateViewMetrics();
+        
+        setupViewMetricsChangedListener();
+    }
+    
+    public static UIWidgetsViewMetrics getMetrics() {
+        UIWidgetsViewController controller = getInstance();
+        return controller.viewMetrics;
+    }
+    
+    enum ZeroSides { NONE, LEFT, RIGHT, BOTH }
+    ZeroSides calculateShouldZeroSides(View unityView) {
+        Activity activity = UnityPlayer.currentActivity;
+        int orientation = activity.getResources().getConfiguration().orientation;
+        int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
+        
+        if (orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            if (rotation == Surface.ROTATION_90) {
+                return ZeroSides.RIGHT;
+            }
+            else if (rotation == Surface.ROTATION_270) {
+                return Build.VERSION.SDK_INT >= 23 ? ZeroSides.LEFT : ZeroSides.RIGHT;
+            } else if (rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_180) {
+                return ZeroSides.BOTH;
+            }
+        }
+        
+        return ZeroSides.NONE;
+    }
+    
+    public boolean lastStatusBarHidden = true;
+    
+    private int calculateBottomKeyboardInset(Rect insets) {
+        if (keyboardOpen) {
+            return insets.bottom;
+        } else {
+            return 0;
+        }
+    }
+    
+    public void updateViewMetrics() {
+        final View unityView = ((ViewGroup)UnityPlayer.currentActivity.findViewById(android.R.id.content)).getChildAt(0);
+        Rect rect = new Rect();
+        unityView.getWindowVisibleDisplayFrame(rect);
+        
+        rect.bottom = unityView.getRootView().getHeight() - (rect.bottom - rect.top) - rect.top;
+        rect.right = unityView.getRootView().getWidth() - (rect.right - rect.left) - rect.left;
+        
+        boolean statusBarHidden = (View.SYSTEM_UI_FLAG_FULLSCREEN & unityView.getWindowSystemUiVisibility()) != 0;
+        boolean navigationBarHidden = (View.SYSTEM_UI_FLAG_HIDE_NAVIGATION & unityView.getWindowSystemUiVisibility()) != 0;
+        
+        ZeroSides zeroSides = ZeroSides.NONE;
+        if (navigationBarHidden) {
+            zeroSides = calculateShouldZeroSides(unityView);
+        }
+        
+        viewMetrics.padding_top = rect.top;
+        viewMetrics.padding_right = zeroSides == ZeroSides.RIGHT || zeroSides == ZeroSides.BOTH ? 0 : rect.right;
+        viewMetrics.padding_bottom = 0;
+        viewMetrics.padding_left = zeroSides == ZeroSides.LEFT || zeroSides == ZeroSides.BOTH ? 0 : rect.left;  
+        
+        viewMetrics.insets_top = 0;
+        viewMetrics.insets_right = 0;
+        viewMetrics.insets_bottom = navigationBarHidden? calculateBottomKeyboardInset(rect) : rect.bottom;
+        viewMetrics.insets_left = 0;
+    }
+    
+    public void setupViewMetricsChangedListener() {
+        final View unityView = ((ViewGroup)UnityPlayer.currentActivity.findViewById(android.R.id.content)).getChildAt(0);
+
+        UnityPlayer.currentActivity.runOnUiThread(new Runnable() {
+            @Override
+            public void run() {
+                unityView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
+                    @Override
+                    public void onSystemUiVisibilityChange(final int visibility){
+                        boolean statusBarHidden = (View.SYSTEM_UI_FLAG_FULLSCREEN & visibility) != 0;
+                        unityView.setSystemUiVisibility(visibility);
+                        UIWidgetsViewController controller = getInstance();
+                        if (statusBarHidden != controller.lastStatusBarHidden) {
+                            controller.onViewMetricsChanged();
+                        }
+                    }
+                });
+            }
+        });
+        
+        
+        unityView.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
+                    private final int defaultKeyboardHeightDP = 100;
+                    private final int estimatedKeyboardDP = defaultKeyboardHeightDP + (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP ? 48 : 0);
+                    private final Rect rect = new Rect();
+        
+                    @Override
+                    public void onGlobalLayout() {
+                        int estimatedKeyboardHeight = (int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, estimatedKeyboardDP, unityView.getResources().getDisplayMetrics());
+                        unityView.getWindowVisibleDisplayFrame(rect);
+                        int heightDiff = unityView.getRootView().getHeight() - (rect.bottom - rect.top);
+                        boolean isShown = heightDiff >= estimatedKeyboardHeight;
+                        
+                        if (keyboardOpen == isShown) {
+                            return;
+                        }
+                        
+                        keyboardOpen = isShown;
+                        onViewMetricsChanged();
+                    }
+                }
+           );
+    }
+    
+    public void onViewMetricsChanged() {
+        updateViewMetrics();
+        UIWidgetsMessageManager.getInstance().UIWidgetsMethodMessage("ViewportMatricsChanged", "UIWidgetViewController.keyboardChanged",
+                        Arrays.asList(""));
+    }
+}

Runtime/Plugins/platform/android/view/UIWidgetsViewController.java.meta

+fileFormatVersion: 2
+guid: dd01a28ebf279449dace0dc8580a9ece
+PluginImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  iconMap: {}
+  executionOrder: {}
+  defineConstraints: []
+  isPreloaded: 0
+  isOverridable: 1
+  isExplicitlyReferenced: 0
+  validateReferences: 1
+  platformData:
+  - first:
+      Android: Android
+    second:
+      enabled: 1
+      settings: {}
+  - first:
+      Any: 
+    second:
+      enabled: 0
+      settings: {}
+  - first:
+      Editor: Editor
+    second:
+      enabled: 0
+      settings:
+        DefaultValueInitialized: true
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Runtime/Plugins/platform/android/view/UIWidgetsViewMetrics.java

+package com.unity.uiwidgets.plugin;
+
+public class UIWidgetsViewMetrics {
+    public float insets_top;
+    public float insets_bottom;
+    public float insets_left;
+    public float insets_right;
+        
+    public float padding_top;
+    public float padding_bottom;
+    public float padding_left;
+    public float padding_right;
+}

Runtime/Plugins/platform/android/view/UIWidgetsViewMetrics.java.meta

+fileFormatVersion: 2
+guid: efb8c112055a04b7dae8566ccf299bc7
+PluginImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  iconMap: {}
+  executionOrder: {}
+  defineConstraints: []
+  isPreloaded: 0
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+  validateReferences: 1
+  platformData:
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+      Android: Android
+    second:
+      enabled: 1
+      settings: {}
+  - first:
+      Any: 
+    second:
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