1 files changed, 96 insertions, 0 deletions
diff --git a/MusicDemo/src/main/java/com/example/android/musicservicedemo/utils/BitmapHelper.java b/MusicDemo/src/main/java/com/example/android/musicservicedemo/utils/BitmapHelper.java
new file mode 100644
index 0000000..c743262
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+++ b/MusicDemo/src/main/java/com/example/android/musicservicedemo/utils/BitmapHelper.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2014 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.example.android.musicservicedemo.utils;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+public class BitmapHelper {
+
+    // Bitmap size for album art in media notifications when there are more than 3 playback actions
+    public static final int MEDIA_ART_SMALL_WIDTH=64;
+    public static final int MEDIA_ART_SMALL_HEIGHT=64;
+
+    // Bitmap size for album art in media notifications when there are no more than 3 playback actions
+    public static final int MEDIA_ART_BIG_WIDTH=128;
+    public static final int MEDIA_ART_BIG_HEIGHT=128;
+
+    public static final Bitmap scaleBitmap(int targetW, int targetH, InputStream is) {
+        // Get the dimensions of the bitmap
+        BitmapFactory.Options bmOptions = new BitmapFactory.Options();
+        bmOptions.inJustDecodeBounds = true;
+        BitmapFactory.decodeStream(is, null, bmOptions);
+        int actualW = bmOptions.outWidth;
+        int actualH = bmOptions.outHeight;
+
+        // Determine how much to scale down the image
+        int scaleFactor = Math.min(actualW/targetW, actualH/targetH);
+
+        // Decode the image file into a Bitmap sized to fill the View
+        bmOptions.inJustDecodeBounds = false;
+        bmOptions.inSampleSize = scaleFactor;
+
+        Bitmap bitmap = BitmapFactory.decodeStream(is, null, bmOptions);
+        return bitmap;
+    }
+
+    public static final Bitmap scaleBitmap(int scaleFactor, InputStream is) {
+        // Get the dimensions of the bitmap
+        BitmapFactory.Options bmOptions = new BitmapFactory.Options();
+
+        // Decode the image file into a Bitmap sized to fill the View
+        bmOptions.inJustDecodeBounds = false;
+        bmOptions.inSampleSize = scaleFactor;
+
+        Bitmap bitmap = BitmapFactory.decodeStream(is, null, bmOptions);
+        return bitmap;
+    }
+
+    public static final int findScaleFactor(int targetW, int targetH, InputStream is) {
+        // Get the dimensions of the bitmap
+        BitmapFactory.Options bmOptions = new BitmapFactory.Options();
+        bmOptions.inJustDecodeBounds = true;
+        BitmapFactory.decodeStream(is, null, bmOptions);
+        int actualW = bmOptions.outWidth;
+        int actualH = bmOptions.outHeight;
+
+        // Determine how much to scale down the image
+        return Math.min(actualW/targetW, actualH/targetH);
+    }
+
+    public static final Bitmap fetchAndRescaleBitmap(String uri, int width, int height)
+            throws IOException {
+        URL url = new URL(uri);
+        HttpURLConnection httpConnection = (HttpURLConnection) url.openConnection();
+        httpConnection.setDoInput(true);
+        httpConnection.connect();
+        InputStream inputStream = httpConnection.getInputStream();
+        int scaleFactor = findScaleFactor(width, height, inputStream);
+
+        httpConnection = (HttpURLConnection) url.openConnection();
+        httpConnection.setDoInput(true);
+        httpConnection.connect();
+        inputStream = httpConnection.getInputStream();
+        Bitmap bitmap = scaleBitmap(scaleFactor, inputStream);
+        return bitmap;
+    }
+
+}