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/*
* 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;
}
}
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