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This repository was archived by the owner on Dec 27, 2024. It is now read-only.

Commit 8d6b4c9

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mutkuensertmutkuensert
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Implement BitmapCompression
0 parents  commit 8d6b4c9

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‎.gitignore‎

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*.iml
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.gradle
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/local.properties
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.idea
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.DS_Store
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/build
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/captures
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.externalNativeBuild
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.cxx
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local.properties

‎BitmapCompression/.gitignore‎

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/build

‎BitmapCompression/build.gradle.kts‎

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plugins {
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alias(libs.plugins.androidLibrary)
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alias(libs.plugins.jetbrainsKotlinAndroid)
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id("maven-publish")
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}
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android {
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namespace = "com.mutkuensert.bitmapcompression"
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compileSdk = 34
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defaultConfig {
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minSdk = 24
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testInstrumentationRunner = "android.support.test.runner.AndroidJUnitRunner"
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consumerProguardFiles("consumer-rules.pro")
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}
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buildTypes {
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release {
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isMinifyEnabled = false
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proguardFiles(
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getDefaultProguardFile("proguard-android-optimize.txt"),
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"proguard-rules.pro"
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)
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}
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}
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compileOptions {
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sourceCompatibility = JavaVersion.VERSION_1_8
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targetCompatibility = JavaVersion.VERSION_1_8
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}
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kotlinOptions {
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jvmTarget = "1.8"
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}
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}
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dependencies {
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implementation(libs.appcompat.v7)
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implementation(libs.androidx.annotation.jvm)
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implementation(libs.androidx.core.ktx)
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}
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afterEvaluate {
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publishing {
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publications {
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register("release", MavenPublication::class) {
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from(components["release"])
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groupId = "com.github.mutkuensert"
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artifactId = "bitmapcompression"
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version = "1.0"
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}
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}
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}
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}

‎BitmapCompression/consumer-rules.pro‎

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‎BitmapCompression/proguard-rules.pro‎

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# Add project specific ProGuard rules here.
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# You can control the set of applied configuration files using the
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# proguardFiles setting in build.gradle.
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#
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# For more details, see
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# http://developer.android.com/guide/developing/tools/proguard.html
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# If your project uses WebView with JS, uncomment the following
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# and specify the fully qualified class name to the JavaScript interface
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# class:
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#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
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# public *;
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#}
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# Uncomment this to preserve the line number information for
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# debugging stack traces.
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#-keepattributes SourceFile,LineNumberTable
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# If you keep the line number information, uncomment this to
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# hide the original source file name.
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#-renamesourcefileattribute SourceFile

‎BitmapCompression/src/main/AndroidManifest.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<manifest />

‎BitmapCompression/src/main/java/com/mutkuensert/bitmapcompression/BitmapCompression.kt‎

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package com.mutkuensert.bitmapcompression
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import android.graphics.Bitmap
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import android.graphics.BitmapFactory
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import androidx.annotation.FloatRange
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import androidx.annotation.IntRange
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import androidx.core.graphics.scale
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import java.io.ByteArrayOutputStream
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import java.io.File
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/**
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* @property sizeLimitBytes Max size the file can be after compression.
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* @property compressPriority Start reducing file size by scaling down or compressing.
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* @property lowerWidthLimit Stop scaling down before dropping down below this value.
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* @property lowerHeightLimit Stop scaling down before dropping down below this value.
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* @property compressionQualityDownTo Lower value means lower quality and smaller size.
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* @property scaleDownFactor Scale factor to divide width and height of image in every loop.
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*/
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class BitmapCompression(
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val sizeLimitBytes: Int,
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val compressPriority: CompressPriority = CompressPriority.STARTBYCOMPRESS,
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val lowerWidthLimit: Int? = null,
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val lowerHeightLimit: Int? = null,
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@IntRange(from = 1, to = 90)
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val compressionQualityDownTo: Int = 10,
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@FloatRange(from = 0.1, to = 0.9)
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val scaleDownFactor: Float = 0.5f
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) {
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fun compress(file: File) {
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if (file.length() < sizeLimitBytes) return
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val byteArrayOutputStream = ByteArrayOutputStream()
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var bitmap = BitmapFactory.decodeFile(file.absolutePath)
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bitmap = compressByPriority(bitmap, byteArrayOutputStream)
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bitmap.recycle()
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file.delete()
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file.createNewFile()
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file.outputStream().use {
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byteArrayOutputStream.writeTo(it)
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}
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byteArrayOutputStream.close()
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}
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private fun compressBitmap(
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bitmap: Bitmap,
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byteArrayOutputStream: ByteArrayOutputStream,
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) {
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var factor = 90
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do {
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byteArrayOutputStream.reset()
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bitmap.compress(Bitmap.CompressFormat.JPEG, factor, byteArrayOutputStream)
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factor -= 10
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if (factor <= compressionQualityDownTo) break
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} while (byteArrayOutputStream.size() >= sizeLimitBytes)
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}
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private fun getScaledDownBitmap(
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bitmap: Bitmap,
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byteArrayOutputStream: ByteArrayOutputStream,
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): Bitmap {
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var scaledDownBitmap = bitmap
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do {
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val scaledDownWidth = scaledDownBitmap.width * scaleDownFactor
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val scaledDownHeight = scaledDownBitmap.height * scaleDownFactor
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if ((lowerWidthLimit != null && scaledDownWidth < lowerWidthLimit)
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|| (lowerHeightLimit != null && scaledDownHeight < lowerHeightLimit)
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) {
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if (compressPriority == CompressPriority.STARTBYSCALEDOWN) {
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break
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} else {
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throw RuntimeException(
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"File is too big for specified upper limits. " +
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"Try with lower limits."
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)
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}
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}
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scaledDownBitmap = scaledDownBitmap.scale(
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width = scaledDownWidth.toInt(),
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height = scaledDownHeight.toInt()
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)
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byteArrayOutputStream.reset()
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scaledDownBitmap.compress(Bitmap.CompressFormat.JPEG, 90, byteArrayOutputStream)
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} while ((byteArrayOutputStream.size() >= sizeLimitBytes))
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return scaledDownBitmap
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}
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enum class CompressPriority {
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STARTBYSCALEDOWN, STARTBYCOMPRESS
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}
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private fun compressByPriority(
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bitmap: Bitmap,
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byteArrayOutputStream: ByteArrayOutputStream,
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): Bitmap {
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var newBitmap = bitmap
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if (compressPriority == CompressPriority.STARTBYSCALEDOWN) {
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newBitmap = getScaledDownBitmap(newBitmap, byteArrayOutputStream)
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compressBitmap(newBitmap, byteArrayOutputStream)
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} else {
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compressBitmap(newBitmap, byteArrayOutputStream)
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newBitmap = getScaledDownBitmap(newBitmap, byteArrayOutputStream)
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}
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return newBitmap
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}
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}

‎build.gradle.kts‎

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// Top-level build file where you can add configuration options common to all sub-projects/modules.
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plugins {
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alias(libs.plugins.androidApplication) apply false
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alias(libs.plugins.jetbrainsKotlinAndroid) apply false
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alias(libs.plugins.androidLibrary) apply false
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}

‎gradle.properties‎

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# Project-wide Gradle settings.
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# IDE (e.g. Android Studio) users:
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# Gradle settings configured through the IDE *will override*
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# any settings specified in this file.
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# For more details on how to configure your build environment visit
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# http://www.gradle.org/docs/current/userguide/build_environment.html
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# Specifies the JVM arguments used for the daemon process.
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# The setting is particularly useful for tweaking memory settings.
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org.gradle.jvmargs=-Xmx2048m -Dfile.encoding=UTF-8
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# When configured, Gradle will run in incubating parallel mode.
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# This option should only be used with decoupled projects. For more details, visit
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# https://developer.android.com/r/tools/gradle-multi-project-decoupled-projects
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# org.gradle.parallel=true
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# AndroidX package structure to make it clearer which packages are bundled with the
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# Android operating system, and which are packaged with your app's APK
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# https://developer.android.com/topic/libraries/support-library/androidx-rn
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android.useAndroidX=true
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# Kotlin code style for this project: "official" or "obsolete":
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kotlin.code.style=official
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# Enables namespacing of each library's R class so that its R class includes only the
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# resources declared in the library itself and none from the library's dependencies,
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# thereby reducing the size of the R class for that library
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android.nonTransitiveRClass=true

‎gradle/libs.versions.toml‎

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[versions]
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agp = "8.3.0"
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kotlin = "1.9.22"
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coreKtx = "1.12.0"
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appcompatV7 = "28.0.0"
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annotationJvm = "1.7.1"
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[libraries]
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androidx-core-ktx = { group = "androidx.core", name = "core-ktx", version.ref = "coreKtx" }
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appcompat-v7 = { group = "com.android.support", name = "appcompat-v7", version.ref = "appcompatV7" }
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androidx-annotation-jvm = { group = "androidx.annotation", name = "annotation-jvm", version.ref = "annotationJvm" }
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[plugins]
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androidApplication = { id = "com.android.application", version.ref = "agp" }
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jetbrainsKotlinAndroid = { id = "org.jetbrains.kotlin.android", version.ref = "kotlin" }
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androidLibrary = { id = "com.android.library", version.ref = "agp" }
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