Add screen lightness

app/src/main/java/com/hippo/widget/ColorView.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2014 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.widget;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.util.AttributeSet;
+import android.view.View;
+
+public class ColorView extends View {
+
+    private int mColor;
+
+    public ColorView(Context context) {
+        super(context);
+    }
+
+    public ColorView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public ColorView(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public void setColor(int color) {
+        if (mColor != color) {
+            mColor = color;
+            invalidate();
+        }
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        canvas.drawColor(mColor);
+    }
+}