ANR on Android 4.x-5.x onCreate

AppIntro Version: 4.2.0

compileSdkVersion 25
    buildToolsVersion "25.0.3"
    defaultConfig {
        applicationId = "com.myapp"
        minSdkVersion 11
        targetSdkVersion 25
        versionCode 100
        versionName "3.1.8"
    }

buildTypes {
        release {
            minifyEnabled true
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-project.txt'
        }
    }
dependencies {
    compile project(':aFileChooser')
    compile 'com.android.support:appcompat-v7:25.1.0'
    compile 'com.android.support:support-v4:25.1.0'
    compile 'com.android.support:design:25.1.0'
    compile 'de.mindpipe.android:android-logging-log4j:1.0.3'
    compile 'com.github.apl-devs:appintro:v4.2.0'
    compile 'log4j:log4j:1.2.17'
}

Device/Android Version: 5.x

Issue details / Repro steps / Use case background: App is reported crashing on Android 4.x-5.x, really have no clue about that. Tried downgrading Google libs from 25.3.x to 25.01.0 as shown in some SO threads but issue was not solved. I suppose it’s related to Proguard optimization of Appintro lib.

Your Code:

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment;

import com.github.paolorotolo.appintro.AppIntro;

public class IntroActivity extends AppIntro {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addSlide(SampleSlide.newInstance(R.layout.slide1));
        addSlide(SampleSlide.newInstance(R.layout.slide2));
        addSlide(SampleSlide.newInstance(R.layout.slide3));
        addSlide(SampleSlide.newInstance(R.layout.slide4));
        setBarColor(getColor(R.color.colorPrimary));
    }

    @Override
    public void onSkipPressed(Fragment currentFragment) {
        finish();
    }

    @Override
    public void onDonePressed(Fragment currentFragment) {
        finish();
    }

}

Stack trace / LogCat:

java.lang.NoSuchMethodError: 
  at com.nbeghin.lib.myapp.IntroActivity.onCreate(IntroActivity.java:0)
  at android.app.Activity.performCreate(Activity.java:6092)
  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1112)
  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2468)
  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2595)
  at android.app.ActivityThread.access$800(ActivityThread.java:178)
  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1470)
  at android.os.Handler.dispatchMessage(Handler.java:111)
  at android.os.Looper.loop(Looper.java:194)
  at android.app.ActivityThread.main(ActivityThread.java:5631)
  at java.lang.reflect.Method.invoke(Method.java:0)
  at java.lang.reflect.Method.invoke(Method.java:372)
  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:959)
  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:754)

Proguard

-dontwarn org.apache.log4j.**
-keepnames public class com.ianhanniballake.localstorage.LocalStorageProvider
-keepclassmembers public class com.ianhanniballake.localstorage.LocalStorageProvider {
    public static final String AUTHORITY;
}

[nicolabeghin]

I’ll surely check that tonight, I have the dump.txt generated by ProGuard and this should shed some light on the whole thing (if AppIntro classes are obfuscated it means ProGuard rules are not taken into considerations, as I see from consumer-proguard-rules.pro https://github.com/apl-devs/AppIntro/blob/master/library/consumer-proguard-rules.pro) -keep class com.github.paolorotolo.** {*;}

[avluis]

Ah~ I’ve seen this before on prior projects. You definitely want to make use of ContextCompat whenever possible when using the newer tools.