Resizer
Inspired by zetbaitsu's Compressor, Resizer is a lightweight and easy-to-use Android library for image scaling. It allows you to resize an image file to a smaller or bigger one while keeping the aspect ratio.
Include Resizer into your project
- Add the JitPack repository to your top-level build.gradle at the end of repositories
allprojects {
repositories {
maven {
url 'https://jitpack.io'
}
}
}
- Add the dependency in your module-level build.gradle
dependencies {
compile 'com.github.hkk595:Resizer:v1.2'
}
Pass in the original image file and get the resized image as a new file
File resizedImage = new Resizer(this)
.setTargetLength(1080)
.setQuality(80)
.setOutputFormat("JPEG")
.setOutputDirPath(storagePath)
.setSourceImage(originalImage)
.getResizedFile();
Pass in the original image file and get the resized image as a new bitmap
Bitmap resizedImage = new Resizer(this)
.setTargetLength(1080)
.setSourceImage(originalImage)
.getResizedBitmap();
Note: You only need to specify the target length (in pixel) of the longer side of the image. Resizer will calculate the rest automatically.
Using RxJava to get the resized image asynchronously
final File[] resizedImage = new File[1]; new Resizer(this)
.setTargetLength(1080)
.setQuality(80)
.setOutputFormat("JPEG")
.setOutputDirPath(storagePath)
.setSourceImage(originalImage)
.getResizedFileAsFlowable()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Consumer<File>() {
@Override
public void accept(File file) {
resizedImage[0] = file;
}
}
, new Consumer<Throwable>() {
@Override
public void accept(Throwable throwable) {
throwable.printStackTrace();
}
}
);
final Bitmap[] resizedImage = new Bitmap[1]; new Resizer(this)
.setTargetLength(1080)
.setSourceImage(originalImage)
.getResizedBitmapAsFlowable()
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Consumer<Bitmap>() {
@Override
public void accept(Bitmap bitmap) {
resizedImage[0] = bitmap;
}
}
, new Consumer<Throwable>() {
@Override
public void accept(Throwable throwable) {
throwable.printStackTrace();
}
}
);
Note: You don't need to declare the new image as final nor array if it is an instance variable of the class, instead of a local variable in a function.
Library specification
Minimum SDK: API 21
Default settings: targetLength: 1080 quality: 80 outputFormat: JPEG outputDirPath: the external files directory of your app
Supported input formats: BMP GIF JPEG PNG WEBP
Supported output formats: JPEG PNG WEBP
Supported quality range: 0~100 The higher value, the better image quality but larger file size PNG, which is a lossless format, will ignore the quality setting License
MIT License
Copyright (c) 2017 K.K. Ho
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.