Issue apache#110 fix

Statusbar overlay view resize with keyboard

added StatusBarViewHelper in plugin.xml

Author: breautek

plugin.xml

@@ -38,6 +38,7 @@
 
     <platform name="android">
         <source-file src="src/android/StatusBar.java" target-dir="src/org/apache/cordova/statusbar" />
+        <source-file src="src/android/StatusBarViewHelper.java" target-dir="src/org/apache/cordova/statusbar" />
 
         <config-file target="res/xml/config.xml" parent="/*">
             <feature name="StatusBar">

src/android/StatusBar.java

@@ -54,6 +54,10 @@ public void initialize(final CordovaInterface cordova, CordovaWebView webView) {
         this.cordova.getActivity().runOnUiThread(new Runnable() {
             @Override
             public void run() {
+                //https://github.com/apache/cordova-plugin-statusbar/issues/110
+                //This corrects keyboard behaviour when overlaysWebView is true
+                StatusBarViewHelper.assistActivity(cordova.getActivity());
+                
                 // Clear flag FLAG_FORCE_NOT_FULLSCREEN which is set initially
                 // by the Cordova.
                 Window window = cordova.getActivity().getWindow();

src/android/StatusBarViewHelper.java

@@ -0,0 +1,61 @@
+package org.apache.cordova.statusbar;
+
+import android.app.Activity;
+import android.graphics.Rect;
+import android.util.Log;
+import android.view.View;
+import android.view.ViewTreeObserver;
+import android.widget.FrameLayout;
+
+public class StatusBarViewHelper {
+
+    // For more information, see https://issuetracker.google.com/issues/36911528
+    // To use this class, simply invoke assistActivity() on an Activity that already has its content view set.
+
+    //This solution was based off of
+    //https://stackoverflow.com/questions/7417123/android-how-to-adjust-layout-in-full-screen-mode-when-softkeyboard-is-visible/19494006#answer-42261118
+
+    private View mChildOfContent;
+    private int usableHeightPrevious;
+    private FrameLayout.LayoutParams frameLayoutParams;
+    private Activity activity;
+
+    static void assistActivity(Activity activity) {
+        new StatusBarViewHelper(activity);
+    }
+
+    private StatusBarViewHelper(Activity a) {
+        activity = a;
+        FrameLayout content = (FrameLayout) activity.findViewById(android.R.id.content);
+        mChildOfContent = content.getChildAt(0);
+
+        mChildOfContent.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
+            public void onGlobalLayout() {
+                possiblyResizeChildOfContent();
+            }
+        });
+
+        frameLayoutParams = (FrameLayout.LayoutParams) mChildOfContent.getLayoutParams();
+    }
+
+    private void possiblyResizeChildOfContent() {
+        int usableHeightNow = computeUsableHeight();
+        if (usableHeightNow != usableHeightPrevious) {
+            frameLayoutParams.height = usableHeightNow;
+            mChildOfContent.requestLayout();
+            usableHeightPrevious = usableHeightNow;
+        }
+    }
+
+    private int computeUsableHeight() {
+        Rect r = new Rect();
+        mChildOfContent.getWindowVisibleDisplayFrame(r);
+        int uiOptions = activity.getWindow().getDecorView().getSystemUiVisibility();
+        boolean isFullscreen = ((uiOptions | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN) == uiOptions);
+
+        //If not fullscreen, then we have to take the status bar into consideration (represented by r.top)
+        //r.bottom defines the keyboard, or navigation bar, or both.
+
+        return isFullscreen ? r.bottom : r.bottom - r.top;
+    }
+}