Android ScrollView child width is larger than the screen (Api 21 bug)

On Android Lollipop this layout would produce a screen where children views of the ScrollView would have incorrect width.

<?xml version="1.0" encoding="utf-8"?> <ScrollView xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:fillViewport="true"> <FrameLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="20dp"> <android.support.design.widget.TextInputLayout android:layout_width="match_parent" android:layout_height="wrap_content" > <EditText android:layout_width="match_parent" android:layout_height="wrap_content" android:textSize="24sp" android:text="Test" /> </android.support.design.widget.TextInputLayout> </FrameLayout> </ScrollView>

This is how the view looks on api level 21 emulator

And this the correct result, from api 27

To fix this ScrollView issue on api 21 devices, the child view "android:layout_margin" should be replaced with "android:padding". If it is not acceptable for the layout to have padding instead of margin (for example due to background color or click area placement) - padding can be set on parent container views. rows="20"

GoScores: leaderboard on Google Cloud

Simple Leaderboard server, written in Go language and hosted on Google Cloud. Source (Github).

Sample app that uses the leaderboard: Buildris on Google Play


Update: Migrating to Go 1.16 on Google Cloud.

Google Cloud no longer supports Go 1.11 runtime, the migration guide from Google is available.

Appengine google.golang.org/appengine/* packages were removed and google cloud cloud.google.com/go/* packages have to be used instead (or Go standard library packages were applicable).

For example:
google.golang.org/appengine/datastore -> cloud.google.com/go/datastore (from Google cloud library) google.golang.org/appengine/log -> log (from Go standard library package)

Sample diff of migration for GoScores app from 1.11 to 1.16, that uses Google Cloud datastore.

To highlight other migration changes:

• Port should now be set explicitly
• Data store API was modified, for example, query.GetAll(() is now dsClient.GetAll().
• Some functions calls changed, for example RunInTransaction() no longer accepts nil for TransactionOptions. Passing nil would result in 503 Server Error and in logs: “panic serving … nil TransactionOption goroutine [running]:”

To test locally:

• Credentials should be locally available, run export with a path to the file with key:
  export GOOGLE_APPLICATION_CREDENTIALS="/home/user/Downloads/service-account-file.json"
  Key is available for download in Cloud Console, IAM and Admin -> Service accounts -> Keys tab. https://cloud.google.com/docs/authentication/production
• go run scores.go
• check GET response on localhost:8080

To deploy:
Inside app dir call (given google-cloud-sdk directory is one level up) ../google-cloud-sdk/bin/gcloud app deploy

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Full logs of app execution and errors are available in Logs Explorer: https://console.cloud.google.com/logs