解决fragment状态栏问题

example/android/app/src/main/java/com/taobao/idlefish/flutterboostexample/FitSystemWindowFrameLayout.java

+package com.taobao.idlefish.flutterboostexample;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.os.Build;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
+import android.support.annotation.RequiresApi;
+import android.support.v4.view.ViewCompat;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.WindowInsets;
+import android.widget.FrameLayout;
+
+
+public class FitSystemWindowFrameLayout extends FrameLayout {
+
+
+    public FitSystemWindowFrameLayout( @NonNull Context context) {
+        super(context);
+    }
+
+    public FitSystemWindowFrameLayout( @NonNull Context context,  @Nullable AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public FitSystemWindowFrameLayout( @NonNull Context context,  @Nullable AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
+    public FitSystemWindowFrameLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    @Override
+    public WindowInsets dispatchApplyWindowInsets(WindowInsets insets) {
+        WindowInsets result = super.dispatchApplyWindowInsets(insets);
+        if (!insets.isConsumed()) {
+            final int count = getChildCount();
+            for (int i = 0; i < count; i++)
+                result = getChildAt(i).dispatchApplyWindowInsets(insets);
+        }
+        return result;
+    }
+ 
+    @Override
+    public void addView(View child, int index, ViewGroup.LayoutParams params) {
+        super.addView(child, index, params);
+        ViewCompat.requestApplyInsets(child);
+    }
+    
+}

example/android/app/src/main/res/layout/flutter_fragment_page.xml

@@ -5,7 +5,7 @@
     android:orientation="vertical"
     android:background="@android:color/white">
 
-    <FrameLayout
+    <com.taobao.idlefish.flutterboostexample.FitSystemWindowFrameLayout
         android:layout_width="match_parent"
         android:layout_height="0dp"
         android:layout_weight="1"