Use getWindowVisibleDisplayFrame to calculate edge insets on api < 20

android/src/main/java/com/th3rdwave/safeareacontext/SafeAreaUtils.java

 
 import android.graphics.Rect;
 import android.os.Build;
-import android.view.Surface;
 import android.view.View;
 import android.view.ViewGroup;
 import android.view.WindowInsets;
-import android.view.WindowManager;
 
 import androidx.annotation.Nullable;
 
 /* package */ class SafeAreaUtils {
-  static @Nullable EdgeInsets getSafeAreaInsets(
-      WindowManager windowManager,
-      View rootView,
-      View view
-  ) {
-    // Window insets are parts of the window that are covered by system views (status bar,
-    // navigation bar, notches). There are no apis the get these values for android < M so we
-    // do a best effort polyfill.
-    EdgeInsets windowInsets;
+
+  private static @Nullable EdgeInsets getRootWindowInsetsCompat(View rootView) {
     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
       WindowInsets insets = rootView.getRootWindowInsets();
       if (insets == null) {
         return null;
       }
-      windowInsets = new EdgeInsets(
+      return new EdgeInsets(
           insets.getSystemWindowInsetTop(),
           insets.getSystemWindowInsetRight(),
           insets.getSystemWindowInsetBottom(),
           insets.getSystemWindowInsetLeft());
     } else {
-      int rotation = windowManager.getDefaultDisplay().getRotation();
-      int statusBarHeight = 0;
-      int resourceId = rootView.getResources().getIdentifier("status_bar_height", "dimen", "android");
-      if (resourceId > 0) {
-        statusBarHeight = rootView.getResources().getDimensionPixelSize(resourceId);
-      }
-      int navbarHeight = 0;
-      resourceId = rootView.getResources().getIdentifier("navigation_bar_height", "dimen", "android");
-      if (resourceId > 0) {
-        navbarHeight = rootView.getResources().getDimensionPixelSize(resourceId);
-      }
+      Rect visibleRect = new Rect();
+      rootView.getWindowVisibleDisplayFrame(visibleRect);
+      return new EdgeInsets(
+          visibleRect.top,
+          rootView.getWidth() - visibleRect.right,
+          rootView.getHeight() - visibleRect.bottom,
+          visibleRect.left);
+    }
+  }
 
-      windowInsets = new EdgeInsets(
-          statusBarHeight,
-          rotation == Surface.ROTATION_90 ? navbarHeight : 0,
-          rotation == Surface.ROTATION_0 || rotation == Surface.ROTATION_180 ? navbarHeight : 0,
-          rotation == Surface.ROTATION_270 ? navbarHeight : 0);
+  static @Nullable EdgeInsets getSafeAreaInsets(View rootView, View view) {
+    EdgeInsets windowInsets = getRootWindowInsetsCompat(rootView);
+    if (windowInsets == null) {
+      return null;
     }
 
     // Calculate the part of the view that overlaps with window insets.

android/src/main/java/com/th3rdwave/safeareacontext/SafeAreaView.java

 import android.content.Context;
 import android.view.ViewGroup;
 import android.view.ViewTreeObserver;
-import android.view.WindowManager;
 
 import com.facebook.infer.annotation.Assertions;
 import com.facebook.react.views.view.ReactViewGroup;
   }
 
   private @Nullable OnInsetsChangeListener mInsetsChangeListener;
-  private final WindowManager mWindowManager;
   private @Nullable EdgeInsets mLastInsets;
   private @Nullable Rect mLastFrame;
 
-  public SafeAreaView(Context context, WindowManager windowManager) {
+  public SafeAreaView(Context context) {
     super(context);
-
-    mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
   }
 
   private void maybeUpdateInsets() {
-    EdgeInsets edgeInsets = SafeAreaUtils.getSafeAreaInsets(mWindowManager, getRootView(), this);
+    EdgeInsets edgeInsets = SafeAreaUtils.getSafeAreaInsets(getRootView(), this);
     Rect frame = SafeAreaUtils.getFrame((ViewGroup) getRootView(), this);
     if (edgeInsets != null && frame != null &&
         (mLastInsets == null ||

android/src/main/java/com/th3rdwave/safeareacontext/SafeAreaViewManager.java

 package com.th3rdwave.safeareacontext;
 
 import android.app.Activity;
-import android.content.Context;
 import android.view.View;
 import android.view.ViewGroup;
-import android.view.WindowManager;
 
 import com.facebook.react.bridge.ReactApplicationContext;
 import com.facebook.react.common.MapBuilder;
 
 public class SafeAreaViewManager extends ViewGroupManager<SafeAreaView> {
   private final ReactApplicationContext mContext;
-  private final WindowManager mWindowManager;
 
   public SafeAreaViewManager(ReactApplicationContext context) {
     super();
 
     mContext = context;
-    mWindowManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
   }
 
   @Override
   @Override
   @NonNull
   public SafeAreaView createViewInstance(@NonNull ThemedReactContext context) {
-    return new SafeAreaView(context, mWindowManager);
+    return new SafeAreaView(context);
   }
 
   @Override
     }
 
     View contentView = decorView.findViewById(android.R.id.content);
-    EdgeInsets insets = SafeAreaUtils.getSafeAreaInsets(
-        mWindowManager,
-        decorView,
-        contentView);
+    EdgeInsets insets = SafeAreaUtils.getSafeAreaInsets(decorView, contentView);
     Rect frame = SafeAreaUtils.getFrame(decorView, contentView);
     if (insets == null || frame == null) {
       return null;

package.json

     "validate:typescript": "tsc --project ./ --noEmit",
     "validate:prettier": "prettier \"src/**/*.{js,ts,tsx}\" \"example/**/*.{js,ts,tsx}\" --check",
     "validate:jest": "jest",
-    "prepare": "bob build"
+    "prepare": "bob build",
+    "example:ios": "cd example && react-native run-ios"
   },
   "keywords": [
     "react-native",

src/index.tsx

 export * from './SafeAreaContext';
 export * from './SafeAreaView';
-export * from './initialWindowMetrics';
+export * from './InitialWindow';
 export * from './SafeArea.types';