Replaced Travis with Github Actions

.github/workflows/build.yml

@@ -0,0 +1,19 @@
+# This workflow will build a Java project with Gradle
+# For more information see: https://help.github.com/actions/language-and-framework-guides/building-and-testing-java-with-gradle
+
+name: build for github actions
+
+on: [pull_request, push]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checking code
+      uses: actions/checkout@v2
+    - name: Grant execute permission for gradlew
+      run: chmod +x gradlew
+    - name: Build the app with Gradle
+      run: ./gradlew build

README.md

@@ -2,7 +2,7 @@
 
 Repository for the PSLab Android App for performing experiments with the [Pocket Science Lab](https://pslab.io) open-hardware platform.
 
-[![Build Status](https://travis-ci.org/fossasia/pslab-android.svg?branch=development)](https://travis-ci.org/fossasia/pslab-android)
+![build for github actions](https://github.com/anurag0singh/pslab-android/workflows/build%20for%20github%20actions/badge.svg)
 [![Codacy Badge](https://api.codacy.com/project/badge/Grade/dd728d91bb5743ff916c16c1251f8dd5)](https://www.codacy.com/app/praveenkumar103/pslab-android?utm_source=github.com&utm_medium=referral&utm_content=fossasia/pslab-android&utm_campaign=Badge_Grade)
 [![Mailing List](https://img.shields.io/badge/Mailing%20List-FOSSASIA-blue.svg)](https://groups.google.com/forum/#!forum/pslab-fossasia)
 ![Minimum API Level](https://img.shields.io/badge/Min%20API%20Level-23-green)