InflateException only in a signed apk

Question

java.lang.RuntimeException: Unable to start activity ComponentInfo{muhammad.ibrahim.alkady.al_quran_al_kareem.radio/muhammad.ibrahim.alkady.al_quran_al_kareem.radio.activities.MainActivity}: android.view.InflateException: Binary XML file line #2: Binary XML file line #126: Binary XML file line #126: Error inflating class muhammad.ibrahim.alkady.al_quran_al_kareem.radio.widget.MiniMediaController
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2450)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2510)
at android.app.ActivityThread.-wrap11(ActivityThread.java)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:5461)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132)
Caused by: android.view.InflateException: Binary XML file line #2: Binary XML file line #126: Binary XML file line #126: Error inflating class muhammad.ibrahim.alkady.al_quran_al_kareem.radio.widget.MiniMediaController
at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
at de.robv.android.xposed.XposedBridge.invokeOriginalMethodNative(Native Method)
at de.robv.android.xposed.XposedBridge.handleHookedMethod(XposedBridge.java:740)
at android.view.LayoutInflater.inflate(<Xposed>)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
at android.support.v7.a.ag.b(Unknown Source)
at android.support.v7.a.u.setContentView(Unknown Source)
at muhammad.ibrahim.alkady.al_quran_al_kareem.radio.activities.MainActivity.onCreate(Unknown Source)
at android.app.Activity.performCreate(Activity.java:6251)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2403)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2510) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
t android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5461) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132) 
Caused by: android.view.InflateException: Binary XML file line #126: Binary XML file line #126: Error inflating class muhammad.ibrahim.alkady.al_quran_al_kareem.radio.widget.MiniMediaController
at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
at de.robv.android.xposed.XposedBridge.invokeOriginalMethodNative(Native Method)
at de.robv.android.xposed.XposedBridge.handleHookedMethod(XposedBridge.java:740)
at android.view.LayoutInflater.inflate(<Xposed>)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at muhammad.ibrahim.alkady.al_quran_al_kareem.radio.fragments.MainFragment.a(Unknown Source)
at android.support.v4.b.u.b(Unknown Source)
at android.support.v4.b.ag.a(Unknown Source)
at android.support.v4.b.ag.b(Unknown Source)
at android.support.v4.b.ag.a(Unknown Source)
at android.support.v4.b.ag.a(Unknown Source)
at android.support.v4.b.ac.a(Unknown Source)
at android.support.v4.b.x.a(Unknown Source)
at android.support.v4.b.s.onCreateView(Unknown Source)
at android.support.v4.b.x.onCreateView(Unknown Source)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:754)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.inflate(LayoutInflater.java:492)
at de.robv.android.xposed.XposedBridge.invokeOriginalMethodNative(Native Method) 
at de.robv.android.xposed.XposedBridge.handleHookedMethod(XposedBridge.java:740) 
at android.view.LayoutInflater.inflate(<Xposed>) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:423) 
at android.view.LayoutInflater.inflate(LayoutInflater.java:374) 
at android.support.v7.a.ag.b(Unknown Source) 
at android.support.v7.a.u.setContentView(Unknown Source) 
at muhammad.ibrahim.alkady.al_quran_al_kareem.radio.activities.MainActivity.onCreate(Unknown Source) 
at android.app.Activity.performCreate(Activity.java:6251) 
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1108) 
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2403) 
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2510) 
at android.app.ActivityThread.-wrap11(ActivityThread.java) 
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1363) 
at android.os.Handler.dispatchMessage(Handler.java:102) 
at android.os.Looper.loop(Looper.java:148) 
at android.app.ActivityThread.main(ActivityThread.java:5461) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 
at de.robv.android.xposed.XposedBridge.main(XposedBridge.java:132) 
Caused by: android.view.InflateException: Binary XML file line #126: Error inflating class muhammad.ibrahim.alkady.al_quran_al_kareem.radio.widget.MiniMediaController
at android.view.LayoutInflater.createView(LayoutInflater.java:628)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:764)
at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:704)
at android.view.LayoutInflater.rInflate(LayoutInflater.java:835)
at android.view.Layout

build.gradle

    apply plugin: 'com.android.application'
apply plugin: 'android-apt'

android {
    compileSdkVersion 24
    buildToolsVersion "24.0.0"

    defaultConfig {
        applicationId "muhammad.ibrahim.alkady.al_quran_al_kareem.radio"
        minSdkVersion 21
        targetSdkVersion 24
        versionCode 10
        versionName "1.9"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}
dependencies { compile fileTree(include: ['*.jar'], dir: 'libs')
    apt 'com.jakewharton:butterknife-compiler:8.1.0'
    compile 'com.android.support:appcompat-v7:24.0.0'
    compile 'com.jakewharton:butterknife:8.1.0'
    compile 'com.google.android.exoplayer:exoplayer:r1.5.9'
    compile 'com.android.support:support-v4:24.0.0'
    compile 'com.android.support:recyclerview-v7:24.0.0'
    compile 'com.android.support:design:24.0.0'
    compile 'jp.wasabeef:recyclerview-animators:2.2.3'
    compile 'com.sothree.slidinguppanel:library:3.3.0'
    compile('com.afollestad:sectioned-recyclerview:0.2.2') {
        transitive = true
    }
    compile('com.mikepenz:aboutlibraries:5.7.0@aar') {
        transitive = true
    }
}

This exception only raised in signed apk. When installing unsigned apk no errors raised.From searching it seems the solution is to modify the proguard-rules.pro but unfortunately I do not know how to do this.Help please. Thanks

Answer 1

Changing the class MiniMediaController constructor from protected to public solves the problem with or without the pro-guard rules.