1 files changed, 62 insertions, 0 deletions
diff --git a/src/com/android/networkrecommendation/ImageUtils.java b/src/com/android/networkrecommendation/ImageUtils.java
new file mode 100644
index 0000000..4b3d042
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+++ b/src/com/android/networkrecommendation/ImageUtils.java
@@ -0,0 +1,62 @@
+/*
+ * 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.networkrecommendation;
+
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.Drawable;
+
+/** Helper for image manipulation */
+public class ImageUtils {
+
+    /**
+     * Convert a drawable to a bitmap, scaled to fit within maxWidth and maxHeight.
+     */
+    public static Bitmap buildScaledBitmap(Drawable drawable, int maxWidth,
+            int maxHeight) {
+        if (drawable == null) {
+            return null;
+        }
+        int originalWidth = drawable.getIntrinsicWidth();
+        int originalHeight = drawable.getIntrinsicHeight();
+
+        if ((originalWidth <= maxWidth) && (originalHeight <= maxHeight)
+                && (drawable instanceof BitmapDrawable)) {
+            return ((BitmapDrawable) drawable).getBitmap();
+        }
+        if (originalHeight <= 0 || originalWidth <= 0) {
+            return null;
+        }
+
+        // create a new bitmap, scaling down to fit the max dimensions of
+        // a large notification icon if necessary
+        float ratio = Math.min((float) maxWidth / (float) originalWidth,
+                (float) maxHeight / (float) originalHeight);
+        ratio = Math.min(1.0f, ratio);
+        int scaledWidth = (int) (ratio * originalWidth);
+        int scaledHeight = (int) (ratio * originalHeight);
+        Bitmap result = Bitmap.createBitmap(scaledWidth, scaledHeight, Bitmap.Config.ARGB_8888);
+
+        // and paint our app bitmap on it
+        Canvas canvas = new Canvas(result);
+        drawable.setBounds(0, 0, scaledWidth, scaledHeight);
+        drawable.draw(canvas);
+
+        return result;
+    }
+}