Settings: Fabulous "Add rule" button.

Bug: 20064962
Change-Id: If7ff9d6cdfc61e5dd9e0d3bc4e2228c5fdaf9fa9

src/com/android/settings/widget/FloatingActionButton.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * 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.android.settings.widget;
+
+import android.animation.AnimatorInflater;
+import android.content.Context;
+import android.graphics.Outline;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewOutlineProvider;
+import android.widget.ImageView;
+
+import com.android.settings.R;
+
+public class FloatingActionButton extends ImageView {
+
+    public FloatingActionButton(Context context, AttributeSet attrs) {
+        super(context, attrs);
+        setScaleType(ScaleType.CENTER);
+        setStateListAnimator(AnimatorInflater.loadStateListAnimator(context, R.anim.fab_elevation));
+        setOutlineProvider(new ViewOutlineProvider() {
+            @Override
+            public void getOutline(View view, Outline outline) {
+                outline.setOval(0, 0, getWidth(), getHeight());
+            }
+        });
+        setClipToOutline(true);
+    }
+
+    @Override
+    protected void onSizeChanged(int w, int h, int oldw, int oldh) {
+        super.onSizeChanged(w, h, oldw, oldh);
+        invalidateOutline();
+    }
+}