Fix status bar background color above NavigationView

app/src/main/java/com/hippo/ehviewer/widget/EhNavigationView.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright 2016 Hippo Seven
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.hippo.ehviewer.widget;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.Paint;
+import android.os.Build;
+import android.support.annotation.NonNull;
+import android.support.design.widget.NavigationView;
+import android.util.AttributeSet;
+
+import com.hippo.widget.drawerlayout.DrawerLayoutChild;
+
+public class EhNavigationView extends NavigationView implements DrawerLayoutChild {
+
+    private static final int SCRIM_COLOR = 0x44000000;
+    private static final boolean DRAW_SCRIM = Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP;
+    private Paint mPaint;
+    private int mFitPaddingTop;
+
+    public EhNavigationView(Context context) {
+        super(context);
+        init();
+    }
+
+    public EhNavigationView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        init();
+    }
+
+    public EhNavigationView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+        init();
+    }
+
+    private void init() {
+        setWillNotDraw(false);
+    }
+
+    @Override
+    public void draw(@NonNull Canvas canvas) {
+        super.draw(canvas);
+
+        if (DRAW_SCRIM && mFitPaddingTop > 0) {
+            if (null == mPaint) {
+                mPaint = new Paint();
+                mPaint.setColor(SCRIM_COLOR);
+            }
+            canvas.drawRect(0, 0, getWidth(), mFitPaddingTop, mPaint);
+        }
+    }
+
+    @Override
+    public void setFitPadding(int top, int bottom) {
+        mFitPaddingTop = top;
+    }
+
+    @Override
+    public int getLayoutPaddingTop() {
+        return 0;
+    }
+
+    @Override
+    public int getLayoutPaddingBottom() {
+        return 0;
+    }
+}