1 files changed, 94 insertions, 0 deletions
diff --git a/src/com/android/launcher3/discovery/RatingView.java b/src/com/android/launcher3/discovery/RatingView.java
new file mode 100644
index 000000000..8fe63d6ba
--- /dev/null
+++ b/src/com/android/launcher3/discovery/RatingView.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2017 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.launcher3.discovery;
+
+import android.content.Context;
+import android.graphics.Canvas;
+import android.graphics.drawable.ClipDrawable;
+import android.graphics.drawable.Drawable;
+import android.util.AttributeSet;
+import android.view.Gravity;
+import android.view.View;
+
+import com.android.launcher3.R;
+
+/**
+ * A simple rating view that shows stars with a rating from 0-5.
+ */
+public class RatingView extends View {
+
+    private static final float WIDTH_FACTOR = 0.9f;
+    private static final int MAX_LEVEL = 10000;
+    private static final int MAX_STARS = 5;
+
+    private final Drawable mStarDrawable;
+    private final int mColorGray;
+    private final int mColorHighlight;
+
+    private float rating;
+
+    public RatingView(Context context) {
+        this(context, null);
+    }
+
+    public RatingView(Context context, AttributeSet attrs) {
+        this(context, attrs, 0);
+    }
+
+    public RatingView(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+        mStarDrawable = getResources().getDrawable(R.drawable.ic_star_rating, null);
+        mColorGray = 0x1E000000;
+        mColorHighlight = 0x8A000000;
+    }
+
+    public void setRating(float rating) {
+        this.rating = Math.min(Math.max(rating, 0), MAX_STARS);
+    }
+
+    @Override
+    protected void onDraw(Canvas canvas) {
+        drawStars(canvas, MAX_STARS, mColorGray);
+        drawStars(canvas, rating, mColorHighlight);
+    }
+
+    private void drawStars(Canvas canvas, float stars, int color) {
+        int fullWidth = getLayoutParams().width;
+        int cellWidth = fullWidth / MAX_STARS;
+        int starWidth = (int) (cellWidth * WIDTH_FACTOR);
+        int padding = cellWidth - starWidth;
+        int fullStars = (int) stars;
+        float partialStarFactor = stars - fullStars;
+
+        for (int i = 0; i < fullStars; i++) {
+            int x = i * cellWidth + padding;
+            Drawable star = mStarDrawable.getConstantState().newDrawable().mutate();
+            star.setTint(color);
+            star.setBounds(x, padding, x + starWidth, padding + starWidth);
+            star.draw(canvas);
+        }
+        if (partialStarFactor > 0f) {
+            int x = fullStars * cellWidth + padding;
+            ClipDrawable star = new ClipDrawable(mStarDrawable,
+                    Gravity.LEFT, ClipDrawable.HORIZONTAL);
+            star.setTint(color);
+            star.setLevel((int) (MAX_LEVEL * partialStarFactor));
+            star.setBounds(x, padding, x + starWidth, padding + starWidth);
+            star.draw(canvas);
+        }
+    }
+}