Switching from travis to github action

Author: asalamon74

.github/workflows/android_build.yml

@@ -0,0 +1,29 @@
+name: Android CI Build
+
+on:
+  push:
+    branches-ignore:
+      - gh-pages
+  pull_request:
+    branches-ignore:
+      - gh-pages
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout Repository
+      uses: actions/checkout@v4
+
+    - name: Set up JDK 17
+      uses: actions/setup-java@v4
+      with:
+        java-version: '17'
+        distribution: 'temurin'
+
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+
+    - name: Build with Gradle
+      run: ./gradlew assembleDebug

.travis.yml

@@ -1,4 +1,4 @@
-[![Build Status](https://travis-ci.com/asalamon74/ztemezszam.svg?branch=master)](https://travis-ci.com/asalamon74/ztemezszam)
+![Build Status](https://github.com/asalamon74/ztemezszam/actions/workflows/android_build.yml/badge.svg)
 [![CodeFactor](https://www.codefactor.io/repository/github/asalamon74/ztemezszam/badge)](https://www.codefactor.io/repository/github/asalamon74/ztemezszam)
 [![GitHub release](https://img.shields.io/github/release/asalamon74/ztemezszam.svg)](https://github.com/asalamon74/ztemezszam/releases)