Add CI (github and codecov) from branch Issue#19

Author: mgautierfr

.codecov.yml

@@ -0,0 +1,13 @@
+codecov:
+  notify:
+    require_ci_to_pass: yes
+
+coverage:
+  status:
+    project:
+      default:
+        threshold: 0.1%
+    patch:
+      default:
+        target: 100%
+        threshold: 20%

.github/workflows/pull_request.yml

@@ -0,0 +1,46 @@
+name: Pull requests
+
+on:
+  pull_request:
+    branches:
+      - '**'
+
+jobs:
+
+  build_job:
+    name: Build Pull Request
+    runs-on: ubuntu-18.04
+
+    steps:
+      - uses: actions/checkout@v1
+        with:
+          fetch-depth: 1
+
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
+
+      - name: Build Project
+        run: bash contrib/build.sh
+
+      - name: Compile Project
+        run: |
+          cd android-libkiwixbuild
+          ./gradlew androidSourcesJar build
+
+      - name: create unit coverage
+        run: |
+          cd android-libkiwixbuild
+          ./gradlew createCodeCoverageReport
+
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v2
+
+      - name: Upload Coverage to GH-Actions
+        uses: actions/[email protected]
+        if: ${{ always()  }}
+        with:
+            name: Tests Coverage Report
+            path: |
+              android-libkiwixbuild/build/coverage-report/

.github/workflows/release.yml

@@ -0,0 +1,49 @@
+name: Build Java-LibKiwix
+
+on:
+  push:
+    branches-ignore:
+      - '*'
+      - '*/**'
+    tags:
+      - '*'
+      - '*/**'
+
+jobs:
+  publish:
+
+    runs-on: ubuntu-18.04
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 1
+
+      - name: Set up JDK 11
+        uses: actions/setup-java@v2
+        with:
+          distribution: adopt
+          java-version: 11
+
+      - name: Building Project
+        run: bash contrib/build.sh
+
+      - name: Release build
+        run: |
+          cd android-libkiwixbuild
+          ./gradlew assemble
+
+      - name: Genrate Source jar
+        run: |
+          cd android-libkiwixbuild
+          ./gradlew androidSourcesJar
+
+      - name: Publish to MavenCentral
+        run: ./gradlew publishReleasePublicationToSonatypeRepository --max-workers 1 closeAndReleaseSonatypeStagingRepository
+        env:
+          ossrhUsername: ${{ secrets.OSSRH_USERNAME }}
+          ossrhPassword: ${{ secrets.OSSRH_PASSWORD }}
+          signing.keyId: ${{ secrets.SIGNING_KEY_ID }}
+          siging.password: ${{ secrets.SIGNING_PASSWORD }}
+          siging.key: ${{ secrets.SIGNING_KEY }}
+          sonatypeStagingProfileId: ${{ secrets.SONATYPE_STAGING_PROFILE_ID }}