How to set proguard rule for Room library on Android

Question

In my application i want use Room library for use database, and for finally for generate APK i enable minify option (proguard) in Build.Gradle .

I use below version of Room library :

implementation "android.arch.persistence.room:runtime:1.1.1"
annotationProcessor "android.arch.persistence.room:compiler:1.1.1"

I write below codes in proguard-rules :

-dontwarn class android.arch.persistence.room.paging.LimitOffsetDataSource
-dontwarn interface android.arch.persistence.room.paging.LimitOffsetDataSource
-dontwarn class android.arch.util.paging.CountedDataSource
-dontwarn interface android.arch.util.paging.CountedDataSource

But when generate APK show me below error in Build tab :

Unknown option 'android.arch.persistence.room.paging.LimitOffsetDataSource' in line 39 of file '/Volumes/M/Test Projects/MyApp/app/proguard-rules.pro'

Show me error for this line :

-dontwarn class android.arch.persistence.room.paging.LimitOffsetDataSource

How can fix this issue?

score 17 · Answer 1 · edited Apr 06 '21 at 11:10

17

If you use androidx

-keep class * extends androidx.room.RoomDatabase
-keep @androidx.room.Entity class *
-dontwarn androidx.room.paging.**

edited Apr 06 '21 at 11:10

User Rebo

3,056
25
30

answered Oct 23 '19 at 18:29

Виталий Робиновский

258
3
9

5

what about the entities, don't they need any -keep's ? – Krzysztof Kubicki Nov 22 '19 at 09:45
Solved entities by adding: `-keep @androidx.room.Entity class *`, see [here](https://stackoverflow.com/questions/11622212/keep-annotated-class-in-proguard) – User Rebo Apr 05 '21 at 12:18

score 2 · Accepted Answer · answered Dec 10 '18 at 06:55

2

Add below lines for keep section in your proguard file.

-dontwarn android.arch.util.paging.CountedDataSource
-dontwarn android.arch.persistence.room.paging.LimitOffsetDataSource

answered Dec 10 '18 at 06:55

karan

8,637
3
41
78

thanks this fixed, but again show me this error : `Expecting java type before ';' in line 71 of file '/Volumes/M/Test Projects/MyApp/app/proguard-rules.pro'` for this line : `-keepclasseswithmembers class * {native ;}` . how can i fix it too? please help me – Dr. Jake Dec 10 '18 at 06:57
use `native ;` you need to add tag `` – karan Dec 10 '18 at 07:01

score 1 · Answer 3 · answered Oct 07 '21 at 06:04

You need to add this line in the proguard file

-keepclassmembers,allowobfuscation class * {
@com.google.gson.annotations.SerializedName <fields>;
}

And your model entity should look like this add SerializedName("key")

@Entity
data class ListElement(

@NonNull
@PrimaryKey
@SerializedName("id")
@Expose
val id: Int,

@SerializedName("userId")
@Expose
val userId: Int,

@SerializedName("title")
@Expose
val title: String,

@SerializedName("completed")
@Expose
val completed: Boolean

)

How to set proguard rule for Room library on Android

3 Answers3

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