How to reduce Apk size when 80% size is due to the third party library?

Question

Currently my app apk size is 22 MB. How will I reduce the app size?

I have compress the size of all the images. I also use the proguard file.

I also use the analyzer apk option in the android studio which shows approx 80% size is due to third party library. I checked through the method count plugin and find that method count is also less.

Than i use the dexcount plugin to check which part of my apk is taking how much method count. Thats the finding:

This is the file of total method count for my apk:

Total method count: 40909

android.support: 22652 com.google.android: 5428

These are the two method count library. Is there way I can reduce the method count. I think reducing the method count will leads to the reducing apk size.

Progaurd File:

#keep json classes                
 -keepclassmembernames class * extends com.applozic.mobicommons.json.JsonMarker {
    !static !transient <fields>;
 }

 -keepclassmembernames class * extends com.applozic.mobicommons.json.JsonParcelableMarker {
    !static !transient <fields>;
 }
 #GSON Config          
-keepattributes Signature
-keep class sun.misc.Unsafe { *; }           
-keep class com.google.gson.examples.android.model.** { *; }            
-keep class org.eclipse.paho.client.mqttv3.logging.JSR47Logger { *; } 
-keep class android.support.** { *; }
-keep interface android.support.** { *; }

-dontwarn sun.misc.Unsafe.**
-dontwarn com.google.gson.examples.android.model.**
-dontwarn org.eclipse.paho.client.mqttv3.logging.JSR47Logger.**
-dontwarn android.support.**
-dontwarn com.google.android.gms.**          
-dontwarn com.roughike.bottombar.**


-keep class com.sun.pdfview.**{ *; } 
-dontwarn com.sun.pdfview.** 

-keep class test.**{ *; }
-dontwarn test.**

app gradle file

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion "25.0.0"
    useLibrary 'org.apache.http.legacy'

    defaultConfig {
        applicationId "user.com.hlthee"
        minSdkVersion 17
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            debuggable false
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
        debug {
            debuggable true
            minifyEnabled true
            shrinkResources true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    sourceSets {
        main {
            assets.srcDirs = ['src/main/assets', 'src/main/assets/']
            res.srcDirs = ['src/main/res', 'src/main/assets/fonts']
        }
    }

    dexOptions {
        jumboMode true
    }

    packagingOptions {
        exclude 'META-INF/DEPENDENCIES'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/ECLIPSE_.SF'
        exclude 'META-INF/ECLIPSE_.RSA'
    }
}


dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    testCompile 'junit:junit:4.12'
    //for bottom bar
    compile 'com.roughike:bottom-bar:2.0.2'
    compile 'com.android.support:cardview-v7:25.1.0'
    compile 'com.android.support:recyclerview-v7:25.1.0'
    compile 'com.android.support:appcompat-v7:25.1.0'
    compile 'com.android.support:design:25.1.0'
    //for volley
    compile 'com.android.volley:volley:1.0.0'
    //graph library
    compile 'com.github.lecho:hellocharts-android:v1.5.8'
    //for file implementation
    compile files('libs/commons-io-2.5.jar')
    //To show the thumbnail of pdf
    compile 'com.github.barteksc:pdfium-android:1.4.0'
    //for applozic chat api
    compile project(':mobicomkitui')
    //for junit
    //universal image loader to load the image.
    compile 'com.github.bumptech.glide:glide:3.7.0'
    //for circlular image
    compile 'de.hdodenhof:circleimageview:1.3.0'
    //for adherence progress circular bar
    compile 'com.github.jakob-grabner:Circle-Progress-View:v1.2.9.1'
    //for the sectioned recycler view
    compile 'com.github.IntruderShanky:Sectioned-RecyclerView:2.1.1'
    //for the multipart things encounter while dealing with image send to server
    compile group: 'org.apache.httpcomponents' , name: 'httpclient-android' , version: '4.3.5.1'
        compile('org.apache.httpcomponents:httpmime:4.3') {
            exclude module: "httpclient"

         }



}

apply plugin: 'com.google.gms.google-services'
apply plugin: 'com.getkeepsafe.dexcount'

Answer 1

Use

proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'

Instead of

proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'