Proguard/r8 instructions missing

Open

#1,843 opened on Apr 18, 2023 3 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty: 2/5
Estimated time: 1-3 hours
Newbie friendliness: 45/100

Issue type: Documentation
Clarity: Mostly clear
Activity status: Stale
Tech stack: android, java
Domain: documentation

Research direction

Start by comparing the Setup Instructions and Android pages linked in the issue, especially the missing ProGuard section reference. Document the required ProGuard/R8 guidance for this library and ensure the Android instructions point to the completed section; verify that the links and wording are consistent.

Written by the indexing model from the issue text.

Description

type: feature request

From the Readme, I am following Setup Instructions, then Android. Here it says "pay special attention to the Android instructions for ProGuard." but the referenced Proguard section does not exist.
I have been using this library with R8 successfully in the past, but recently tried out full mode, and got following exception:

Non-fatal Exception: java.lang.ExceptionInInitializerError:
       at java.lang.Class.newInstance(Class.java)
       at com.google.api.client.util.Types.newInstance(Types.java:113)
       at com.google.api.client.util.Data.newMapInstance(Data.java:550)
       at com.google.api.client.json.JsonParser.parseValue(JsonParser.java:766)
       at com.google.api.client.json.JsonParser.parse(JsonParser.java:360)
       at com.google.api.client.json.JsonParser.parse(JsonParser.java:335)
       at com.google.api.client.json.JsonObjectParser.parseAndClose(JsonObjectParser.java:79)
       at com.google.api.client.json.JsonObjectParser.parseAndClose(JsonObjectParser.java:73)
       at com.google.api.client.http.HttpResponse.parseAs(HttpResponse.java:460)
       at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:603)
       at org.totschnig.drive.sync.DriveServiceHelper.getFile(DriveServiceHelper.java:143)
       at org.totschnig.drive.sync.GoogleDriveBackendProvider.requireBaseFolder(GoogleDriveBackendProvider.kt:403)
       at org.totschnig.drive.sync.GoogleDriveBackendProvider.<init>(GoogleDriveBackendProvider.kt:420)
       at org.totschnig.drive.sync.GoogleDriveBackendProviderFactory.fromAccount(GoogleDriveBackendProviderFactory.kt:19)
       at org.totschnig.drive.sync.GoogleDriveBackendProviderFactory.fromAccount(GoogleDriveBackendProviderFactory.kt:12)
       at org.totschnig.myexpenses.sync.SyncBackendProviderFactory.from-0E7RQCE(SyncBackendProviderFactory.kt:18)
       at org.totschnig.myexpenses.sync.SyncBackendProviderFactory.access$from-0E7RQCE(SyncBackendProviderFactory.kt:12)
       at org.totschnig.myexpenses.sync.SyncBackendProviderFactory$Companion.get-0E7RQCE(SyncBackendProviderFactory.kt:41)
       at org.totschnig.myexpenses.sync.SyncAdapter.onPerformSync(SyncAdapter.kt:123)
       at android.content.AbstractThreadedSyncAdapter$SyncThread.run(AbstractThreadedSyncAdapter.java:354)

Caused by java.lang.IllegalArgumentException: unable to create new instance of class kc.a because it is abstract and because it has no accessible default constructor
       at com.google.api.client.util.Types.handleExceptionForNewInstance(Types.java:162)
       at com.google.api.client.util.Types.newInstance(Types.java:117)
       at com.google.api.client.util.Data.createNullInstance(Data.java:166)
       at com.google.api.client.util.Data.nullOf(Data.java:134)
       at com.google.api.services.drive.model.File.<clinit>(File.java:69)
       at java.lang.Class.newInstance(Class.java)
       at com.google.api.client.util.Types.newInstance(Types.java:113)
       at com.google.api.client.util.Data.newMapInstance(Data.java:550)
       at com.google.api.client.json.JsonParser.parseValue(JsonParser.java:766)
       at com.google.api.client.json.JsonParser.parse(JsonParser.java:360)
       at com.google.api.client.json.JsonParser.parse(JsonParser.java:335)
       at com.google.api.client.json.JsonObjectParser.parseAndClose(JsonObjectParser.java:79)
       at com.google.api.client.json.JsonObjectParser.parseAndClose(JsonObjectParser.java:73)
       at com.google.api.client.http.HttpResponse.parseAs(HttpResponse.java:460)
       at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:603)
       at org.totschnig.drive.sync.DriveServiceHelper.getFile(DriveServiceHelper.java:143)
       at org.totschnig.drive.sync.GoogleDriveBackendProvider.requireBaseFolder(GoogleDriveBackendProvider.kt:403)
       at org.totschnig.drive.sync.GoogleDriveBackendProvider.<init>(GoogleDriveBackendProvider.kt:420)
       at org.totschnig.drive.sync.GoogleDriveBackendProviderFactory.fromAccount(GoogleDriveBackendProviderFactory.kt:19)
       at org.totschnig.drive.sync.GoogleDriveBackendProviderFactory.fromAccount(GoogleDriveBackendProviderFactory.kt:12)
       at org.totschnig.myexpenses.sync.SyncBackendProviderFactory.from-0E7RQCE(SyncBackendProviderFactory.kt:18)
       at org.totschnig.myexpenses.sync.SyncBackendProviderFactory.access$from-0E7RQCE(SyncBackendProviderFactory.kt:12)
       at org.totschnig.myexpenses.sync.SyncBackendProviderFactory$Companion.get-0E7RQCE(SyncBackendProviderFactory.kt:41)
       at org.totschnig.myexpenses.sync.SyncAdapter.onPerformSync(SyncAdapter.kt:123)
       at android.content.AbstractThreadedSyncAdapter$SyncThread.run(AbstractThreadedSyncAdapter.java:354)

Caused by java.lang.InstantiationException: java.lang.Class<kc.a> cannot be instantiated
       at java.lang.Class.newInstance(Class.java)
       at com.google.api.client.util.Types.newInstance(Types.java:113)
       at com.google.api.client.util.Data.createNullInstance(Data.java:166)
       at com.google.api.client.util.Data.nullOf(Data.java:134)
       at com.google.api.services.drive.model.File.<clinit>(File.java:69)
       at java.lang.Class.newInstance(Class.java)
       at com.google.api.client.util.Types.newInstance(Types.java:113)
       at com.google.api.client.util.Data.newMapInstance(Data.java:550)
       at com.google.api.client.json.JsonParser.parseValue(JsonParser.java:766)
       at com.google.api.client.json.JsonParser.parse(JsonParser.java:360)
       at com.google.api.client.json.JsonParser.parse(JsonParser.java:335)
       at com.google.api.client.json.JsonObjectParser.parseAndClose(JsonObjectParser.java:79)
       at com.google.api.client.json.JsonObjectParser.parseAndClose(JsonObjectParser.java:73)
       at com.google.api.client.http.HttpResponse.parseAs(HttpResponse.java:460)
       at com.google.api.client.googleapis.services.AbstractGoogleClientRequest.execute(AbstractGoogleClientRequest.java:603)
       at org.totschnig.drive.sync.DriveServiceHelper.getFile(DriveServiceHelper.java:143)
       at org.totschnig.drive.sync.GoogleDriveBackendProvider.requireBaseFolder(GoogleDriveBackendProvider.kt:403)
       at org.totschnig.drive.sync.GoogleDriveBackendProvider.<init>(GoogleDriveBackendProvider.kt:420)
       at org.totschnig.drive.sync.GoogleDriveBackendProviderFactory.fromAccount(GoogleDriveBackendProviderFactory.kt:19)
       at org.totschnig.drive.sync.GoogleDriveBackendProviderFactory.fromAccount(GoogleDriveBackendProviderFactory.kt:12)
       at org.totschnig.myexpenses.sync.SyncBackendProviderFactory.from-0E7RQCE(SyncBackendProviderFactory.kt:18)
       at org.totschnig.myexpenses.sync.SyncBackendProviderFactory.access$from-0E7RQCE(SyncBackendProviderFactory.kt:12)
       at org.totschnig.myexpenses.sync.SyncBackendProviderFactory$Companion.get-0E7RQCE(SyncBackendProviderFactory.kt:41)
       at org.totschnig.myexpenses.sync.SyncAdapter.onPerformSync(SyncAdapter.kt:123)
       at android.content.AbstractThreadedSyncAdapter$SyncThread.run(AbstractThreadedSyncAdapter.java:354)

Dominant language: Java
Stars: 1.4k
Forks: 476
Avg merge: 10h 47m
Merged PRs (30d): 3

Getting set up

No Dockerfile or Docker Compose file
Has a pull request template
Read the contributing guide

First steps

Read the whole issue, then the project's contributing guide.
Comment on the issue to say you are picking it up — it saves two people doing the same work.
Fork the repository and make your change on a branch.
Open a pull request that references the issue number.

More from googleapis/google-http-java-client

Core: Validate header names and values to prevent CRLF injection
Possibly taken @insaf021 claimed this 106 days ago. Open
- Is something wrong?
priority: p3

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

googleapis/google-http-java-client#2180 · Opened Jul 30, 2026
Core: XmlPullParser processes external DTD entities (XXE) — disable FEATURE_PROCESS_DOCDECL in Xml#createParser()
Possibly taken @insaf021 claimed this 106 days ago. Open
- Is something wrong?
priority: p3

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

googleapis/google-http-java-client#2179 · Opened Jul 30, 2026
Core: LowLevelHttpResponse not disconnected when HttpResponse construction throws RuntimeException
Possibly taken @insaf021 claimed this 106 days ago. Open
- Is something wrong?
priority: p3

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

googleapis/google-http-java-client#2177 · Opened Jul 30, 2026
GZipEncoding should throw IOException from close
Open
- Is something wrong?
type: cleanup

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

googleapis/google-http-java-client#868 · Opened Oct 31, 2019
org.apache.http.conn.ssl.SSLSocketFactory is deprecated
May be free again A pull request for this issue was closed without being merged. Open
- Is something wrong?
priority: p2 type: cleanup

Difficulty 2/5 1-3 hours Newbie friendliness 65/100

googleapis/google-http-java-client#778 · Opened Aug 8, 2019

All issues in googleapis/google-http-java-client

Similar issues

Broken links in the Welcome section
Open
- Is something wrong?
Difficulty 1/5 Under an hour Newbie friendliness 88/100

testng-team/testng-team.github.io#87 · Opened Nov 14, 2026
Error Prone is never detected in Maven builds: the regex in jvm/analysis.py contains literal backspace bytes where \b was meant
Open
- Is something wrong?
Difficulty 2/5 Under an hour Newbie friendliness 84/100

cpp-best-practices/project_validator#251 · Opened Nov 14, 2026

Maintainers usually reply within 1 day
Rate limiting: token bucket with unit tests
Open
- Is something wrong?
backend enhancement

Difficulty 2/5 Half a day Newbie friendliness 70/100

damodharg6/payledger#16 · Opened Nov 14, 2026
[Bug]: An initiative list with no current entry logs an error on every change
Possibly taken @dwizard0 claimed this today. Open
- Is something wrong?
Difficulty 2/5 1-3 hours Newbie friendliness 75/100

RPTools/maptool#6251 · Opened Nov 14, 2026

Maintainers usually reply within 1 day
ReCounters.java returns a counter without retries from create()
Open
- Is something wrong?
Difficulty 1/5 Under an hour Newbie friendliness 85/100

sttc/java-sdk#149 · Opened Nov 14, 2026

Maintainers usually reply within 1 day

More Java issues

Proguard/r8 instructions missing

Is something wrong?

Assessment

Research direction

Description

Getting set up

First steps

More from googleapis/google-http-java-client

Is something wrong?

Is something wrong?

Is something wrong?

Is something wrong?

Is something wrong?

Similar issues

Is something wrong?

Is something wrong?

Is something wrong?

Is something wrong?

Is something wrong?

Get new issues in your inbox