I am working on app that uses MVVM, Room and dagger hilt, the app is crashed after applied Proguard rules, minifyEnabled and shrinkResources
the output
2021-08-11 08:30:56.952 13679-13679/? E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.test.dummyappv3, PID: 13679
java.lang.NullPointerException: Attempt to read from field 'e.f.a.i.a e.f.a.i.c.b' on a null object reference
at com.test.dummyappv3.viewmodels.PostViewModel.<init>(Unknown Source:43)
at e.f.a.g$k$a.get(:3)
at d.p.a.c(:8)
at d.p.a.a(Unknown Source:6)
at f.a.a.c.b.d.a(Unknown Source:14)
at d.p.w.a(:3)
at com.test.dummyappv3.ui.home.HomeFragment.T(:3)
at d.n.b.m.n0(Unknown Source:19)
at d.n.b.h0.f(:4)
at d.n.b.h0.k(:8)
at d.n.b.b0.S(:1)
at d.n.b.b0.w(:3)
at d.n.b.h0.f(:8)
at d.n.b.h0.k(:8)
at d.n.b.b0.S(:1)
at d.n.b.b0.w(:3)
at d.n.b.p.onStart(:4)
at d.b.c.k.onStart(Unknown Source:0)
at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1433)
at android.app.Activity.performStart(Activity.java:7923)
at android.app.ActivityThread.handleStartActivity(ActivityThread.java:3332)
at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:221)
at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:201)
at android.app.servertransaction.TransactionExecutor.executeLifecycleState(TransactionExecutor.java:173)
at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:97)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2044)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:224)
at android.app.ActivityThread.main(ActivityThread.java:7562)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)
Obviously the error refers to the injected repository constructor in the viewmodel class, it's look the proguard converted it to this letters 'e.f.a.i.a e.f.a.i.c.b'
Viewmodel
@HiltViewModel
public class PostViewModel extends ViewModel {
public static final String TAG = "PostViewModel";
private Repository repository = null;
public MutableLiveData<PostList> postListMutableLiveData = new MutableLiveData<>();
public MutableLiveData<String> finalURL = new MutableLiveData<>();
public MutableLiveData<String> token = new MutableLiveData<>();
public MutableLiveData<String> label = new MutableLiveData<>();
public MutableLiveData<Boolean> ifAnythingWrongHappened = new MutableLiveData<>();
@Inject
public PostViewModel(Repository repository) {
this.repository = repository; //<<< Here
}
public final LiveData<List<Item>> getAllPostsFromDB
= LiveDataReactiveStreams.fromPublisher(repository.localDataSource.getAlItems());
@SuppressLint("CheckResult")
public void getPosts() {
ifAnythingWrongHappened.setValue(false);
Log.e(TAG, finalURL.getValue());
repository.remoteDataSource.getPostList(finalURL.getValue())
.subscribeOn(Schedulers.io())
.observeOn(AndroidSchedulers.mainThread())
.subscribe(new Observer<PostList>() {
@Override
public void onSubscribe(@io.reactivex.rxjava3.annotations.NonNull Disposable d) {
}
@Override
public void onNext(@io.reactivex.rxjava3.annotations.NonNull PostList postList) {
Log.e(TAG, postList.getNextPageToken());
token.setValue(postList.getNextPageToken());
postListMutableLiveData.setValue(postList);
for (int i = 0; i < postList.getItems().size(); i++) {
repository.localDataSource.insertItem(postList.getItems().get(i))
.subscribeOn(Schedulers.computation())
.subscribe(new CompletableObserver() {
@Override
public void onSubscribe(@io.reactivex.rxjava3.annotations.NonNull Disposable d) {
}
@Override
public void onComplete() {
}
@Override
public void onError(@io.reactivex.rxjava3.annotations.NonNull Throwable e) {
Log.e(TAG, "onError: "+e.getMessage() );
ifAnythingWrongHappened.setValue(true);
}
});
}
finalURL.setValue(finalURL.getValue() + "&pageToken=" + token.getValue());
}
@Override
public void onError(@io.reactivex.rxjava3.annotations.NonNull Throwable e) {
Log.e(TAG, e.getMessage() + e.getCause());
ifAnythingWrongHappened.setValue(true);
}
@Override
public void onComplete() {
}
});
}
I searched for the Viewmodel and Dagger-hilt rules for the proguard, I added the viewmodels rules but I didn't find any modern ruels for dagger2 or dagger-hilt, however I found old rules for dagger1 and I added it with some edits
Here's the full proguard rules
-dontusemixedcaseclassnames
-dontskipnonpubliclibraryclasses
-verbose
-dontpreverify
-dontnote android.net.http.*
-dontnote org.apache.commons.codec.**
-dontnote org.apache.commons.logging.**
-dontnote org.apache.http.**
# Enable Optimization. # Optimization is turned off by default.
-optimizations code/simplification/arithmetic,!code/simplification/cast,!field
-optimizationpasses 5
-allowaccessmodification
#Disable Optimization
#-dontoptimize
#-dontpreverify
# Remove Log command from code
-assumenosideeffects class android.util.Log{
public static *** d(...);
public static *** i(...);
public static *** v(...);
}
# -------------------------------------------------
-keep public class * extends android.app.Activity
-keep public class * extends android.app.Application
-keep public class * extends android.app.Service
-keep public class * extends android.content.BroadcastReceiver
-keep public class * extends android.content.ContentProvider
-keep public class * extends android.app.backup.BackupAgentHelper
-keep public class * extends android.app.backup.BackupAgent
-keep public class * extends android.preference.Preference
-keep public class * extends androidx.fragment.app.Fragment
-keep public class * extends androidx.fragment.app.DialogFragment
-keep public class * extends com.actionbarsherlock.app.SherlockListFragment
-keep public class * extends com.actionbarsherlock.app.SherlockFragment
-keep public class * extends android.app.Fragment
-keep public class com.android.vending.licensing.ILicensingService
-keep public class * extends java.lang.Exception
-keep class androidx.appcompat.app.AppCompatActivity {*;}
-keep class androidx.appcompat.widget.ShareActionProvider {*;}
-keep class androidx.appcompat.widget.Toolbar {*;}
-keep class androidx.browser.customtabs.CustomTabsIntent {*;}
-keep class androidx.core.view.MenuItemCompat {*;}
# -------------------------------------------------
-injars libs
-keepattributes *Annotation*, Signature, Exception, EnclosingMethod, InnerClasses
-keepattributes JavascriptInterface
# Keep source file name and line number
-keepattributes SourceFile,LineNumberTable
-keep class okhttp3.** {*;}
-keep interface okhttp3.** {*;}
-dontwarn okhttp3.**
-keep class okio.** { *; }
-keep interface okio.** { *; }
-dontwarn okio.**
-keep class org.apache.http.** { *; }
-keep class org.apache.james.mime4j.** { *; }
-dontwarn org.apache.**
-keep class com.activeandroid.** { *; }
-keep class com.activeandroid.**.** { *; }
-dontwarn com.activeandroid.**
-keep class * extends com.activeandroid.Model
-keep class * extends com.activeandroid.serializer.TypeSerializer
-keep class android.support.v7.** { *; }
-keep interface android.support.v7.** { *; }
-dontwarn android.support.v7.**
# Dontwarn-----------------------------------------
-dontwarn javax.**
-dontwarn java.lang.management.**
-dontwarn org.apache.log4j.**
-dontwarn org.apache.commons.logging.**
-dontwarn android.support.**
-dontwarn com.google.ads.**
-dontwarn org.slf4j.**
-dontwarn org.json.**
-keep public class * extends android.view.View {
public <init>(android.content.Context);
public <init>(android.content.Context, android.util.AttributeSet);
public <init>(android.content.Context, android.util.AttributeSet, int);
public void set*(...);
}
# -------------------------------------------------
-keepclasseswithmembers class * {
public <init>(android.content.Context, android.util.AttributeSet);
}
-keepclasseswithmembers class * {
public <init>(android.content.Context, android.util.AttributeSet, int);
}
-keepclasseswithmembernames class * {
native <methods>;
}
-keepclassmembers class * extends android.content.Context {
public void *(android.view.View);
public void *(android.view.MenuItem);
}
-keepclassmembers class * implements android.os.Parcelable {
static ** CREATOR;
}
-keepclassmembers class * implements java.io.Serializable {
static final long serialVersionUID;
private static final java.io.ObjectStreamField[] serialPersistentFields;
!static !transient <fields>;
private void writeObject(java.io.ObjectOutputStream);
private void readObject(java.io.ObjectInputStream);
java.lang.Object writeReplace();
java.lang.Object readResolve();
}
-keepclassmembers class * extends android.app.Activity {
public void *(android.view.View);
}
-keepclassmembers enum * {
public static **[] values();
public static ** valueOf(java.lang.String);
}
-keepclassmembers class **.R$* {
public static <fields>;
}
-keepclassmembers class * {
@android.webkit.JavascriptInterface <methods>;
}
# Support Library
-keep class android.support.** {*;}
-keep interface android.support.** {*;}
# Needed when building against Marshmallow SDK.
-dontwarn android.app.Notification
# Retrofit and GSON
-keep class com.squareup.okhttp3.** { *; }
-keep interface com.squareup.okhttp3.** { *; }
-dontwarn com.squareup.okhttp3.**
-keep class retrofit2.** { *; }
-dontwarn retrofit2.**
-keep class com.google.gson.** { *; }
-dontwarn com.google.gson.**
-keep class sun.misc.Unsafe.** { *; }
-dontwarn sun.misc.Unsafe.**
-keep public class com.google.gson.** {*;}
-keep class * implements com.google.gson.** {*;}
-keep class com.google.gson.stream.** { *; }
-dontwarn com.google.gson.**
#-keep class * implements com.google.gson.TypeAdapterFactory
#-keep class * implements com.google.gson.JsonSerializer
#-keep class * implements com.google.gson.JsonDeserializer
-keepclasseswithmembers class * {@retrofit2.http.* <methods>;}
-keepclasseswithmembers interface * { @retrofit2.* <methods>;}
-dontwarn com.google.appengine.**
-dontwarn java.nio.file.**
-dontwarn org.codehaus.**
-dontwarn org.codehaus.mojo.**
-dontwarn retrofit2.Platform$Java8
-dontnote retrofit2.Platform
-dontnote retrofit2.Platform$IOS$MainThreadExecutor
# OkHttp and Picasso
-keep class com.squareup.okhttp.** { *; }
-keep interface com.squareup.okhttp.** { *; }
-dontwarn com.squareup.okhttp.**
# Keep line number
-keepattributes SourceFile,LineNumberTable
# Google Play Admob
-keep public class com.google.android.gms.ads.** {
public *;
}
-keep public class com.google.ads.** {
public *;
}
-keep class com.google.ads.** # Don't proguard AdMob classes
-dontwarn com.google.ads.** # Temporary workaround for v6.2.1. It gives a warning that you can ignore
# Facebook
-keep class com.facebook.** {*;}
-dontwarn com.facebook.**
-keepclassmembers class * implements java.io.Serializable {
private static final java.io.ObjectStreamField[] serialPersistentFields;
private void writeObject(java.io.ObjectOutputStream);
private void readObject(java.io.ObjectInputStream);
java.lang.Object writeReplace();
java.lang.Object readResolve();
}
# Lru Cache
-keep class com.squareup.picasso.LruCache { *; }
-dontwarn com.squareup.picasso.LruCache.**
# Firebase
-keep class com.firebase.** { *; }
-dontwarn com.firebase.**
-keepnames class com.shaded.fasterxml.** { *; }
-dontwarn org.shaded.apache.**
-keep class org.apache.** { *; }
-dontwarn org.apache.**
-keepnames class org.ietf.jgss.** { *; }
-dontwarn org.ietf.jgss.**
-keepnames class com.fasterxml.jackson.** { *; }
-dontwarn com.fasterxml.**
-keepnames class javax.servlet.** { *; }
-dontwarn org.w3c.dom.**
-dontwarn org.joda.time.**
-dontnote com.firebase.client.core.GaePlatform
## Android architecture components: Lifecycle
# LifecycleObserver's empty constructor is considered to be unused by proguard
-keepclassmembers class * implements android.arch.lifecycle.LifecycleObserver {
<init>(...);
}
# ViewModel's empty constructor is considered to be unused by proguard
-keepclassmembers class * extends android.arch.lifecycle.ViewModel {
<init>(...);
}
# keep Lifecycle State and Event enums values
-keepclassmembers class android.arch.lifecycle.Lifecycle$State { *; }
-keepclassmembers class android.arch.lifecycle.Lifecycle$Event { *; }
# keep methods annotated with @OnLifecycleEvent even if they seem to be unused
# (Mostly for LiveData.LifecycleBoundObserver.onStateChange(), but who knows)
-keepclassmembers class * {
@android.arch.lifecycle.OnLifecycleEvent *;
}
-keepclassmembers class * implements android.arch.lifecycle.LifecycleObserver {
<init>(...);
}
-keep class * implements android.arch.lifecycle.LifecycleObserver {
<init>(...);
}
-keepclassmembers class android.arch.** { *; }
-keep class android.arch.** { *; }
-dontwarn android.arch.**
-keep class com.github.ybq.android.spinkit.SpinKitView
-dontwarn com.github.ybq.android.spinkit.SpinKitView
#Glide
-keep public class * implements com.bumptech.glide.module.GlideModule
-keep public class * extends com.bumptech.glide.module.AppGlideModule
-keep public enum com.bumptech.glide.load.ImageHeaderParser$** {
**[] $VALUES;
public *;
}
-dontwarn com.bumptech.glide.load.engine.bitmap_recycle.LruBitmapPool
-dontwarn com.bumptech.glide.load.resource.bitmap.Downsampler
-dontwarn com.bumptech.glide.load.resource.bitmap.HardwareConfigState
-keep class com.google.**
-dontwarn com.google.**
-dontwarn sun.misc.Unsafe
-keep class org.ocpsoft.prettytime.** {*;}
-dontwarn org.ocpsoft.prettytime.**
#ViewModel
## Android architecture components: Lifecycle
# LifecycleObserver's empty constructor is considered to be unused by proguard
-keepclassmembers class * implements android.arch.lifecycle.LifecycleObserver {
<init>(...);
}
# ViewModel's empty constructor is considered to be unused by proguard
-keepclassmembers class * extends android.arch.lifecycle.ViewModel {
<init>(...);
}
# keep Lifecycle State and Event enums values
-keepclassmembers class android.arch.lifecycle.Lifecycle$State { *; }
-keepclassmembers class android.arch.lifecycle.Lifecycle$Event { *; }
# keep methods annotated with @OnLifecycleEvent even if they seem to be unused
# (Mostly for LiveData.LifecycleBoundObserver.onStateChange(), but who knows)
-keepclassmembers class * {
@android.arch.lifecycle.OnLifecycleEvent *;
}
-keep class androidx.lifecycle.** { *; }
#all
-ignorewarnings
-keep class * {
public private *;
}
-keep class com.google.android.gms.** { *; }
-dontwarn com.google.android.gms.**
-dontwarn org.xmlpull.v1.**
-dontnote org.xmlpull.v1.**
-keep class org.xmlpull.** { *; }
#retRofit
# Platform calls Class.forName on types which do not exist on Android to determine platform.
-dontnote retrofit2.Platform
# Platform used when running on RoboVM on iOS. Will not be used at runtime.
-dontnote retrofit2.Platform$IOS$MainThreadExecutor
# Platform used when running on Java 8 VMs. Will not be used at runtime.
-dontwarn retrofit2.Platform$Java8
# Retain generic type information for use by reflection by converters and adapters.
-keepattributes Signature
# Retain declared checked exceptions for use by a Proxy instance.
-keepattributes Exceptions
-keepclasseswithmembers class * {
@retrofit2.http.* <methods>;
}
# Orm
-keep class * extends com.raizlabs.android.dbflow.config.DatabaseHolder { *; }
# Fresco
-keep,allowobfuscation @interface com.facebook.common.internal.DoNotStrip
-keep @com.facebook.common.internal.DoNotStrip class *
-keepclassmembers class * {
@com.facebook.common.internal.DoNotStrip *;
}
-keepclassmembers class * {
native <methods>;
}
-dontwarn okio.**
-dontwarn com.squareup.okhttp.**
-dontwarn okhttp3.**
-dontwarn javax.annotation.**
-dontwarn com.android.volley.toolbox.**
# com.github.siyamed:android-shape-imageview
-dontwarn android.support.v7.**
-keepattributes *Annotation,Signature
-dontwarn com.github.siyamed.**
-keep class com.github.siyamed.shapeimageview.**{ *; }
-dontwarn org.xmlpull.v1.**
-dontwarn uk.co.senab.photoview.**
#Image Cropper
-keep class androidx.appcompat.widget.** { *; }
# Keep source file names, line numbers, and Parse class/method names for easier debugging
-keepattributes SourceFile,LineNumberTable
-keepnames class com.parse.** { *; }
# Required for Parse
-keepattributes *Annotation*
-keepattributes Signature
-dontwarn com.squareup.**
-dontwarn okio.**
-keepattributes SourceFile,LineNumberTable
-keep class com.parse.*{ *; }
-dontwarn com.parse.**
-dontwarn com.squareup.picasso.**
-keepclasseswithmembernames class * {
native <methods>;
}
-keepattributes *Annotation*,EnclosingMethod
-keep @interface dagger.*,javax.inject.*
-keep @dagger.Module class *
-keepclassmembers class * {
@javax.inject.* *;
@dagger.* *;
();
}
-keepclasseswithmembernames class * {
@javax.inject.* ;
}
-keep class javax.inject.** { *; }
-keep class **$$ModuleAdapter
-keep class **$$InjectAdapter
-keep class **$$StaticInjection
-keep class dagger.** { *; }
-keep class * extends dagger.** { *; }
-keep interface dagger.** {*;}
-dontwarn dagger.internal.codegen.**
-keep class * extends dagger.hilt.*
in build gradle
buildTypes {
release {
minifyEnabled true
shrinkResources true
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
}
