build.gradle

/*
 * Copyright 2019 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import groovy.xml.MarkupBuilder;

apply plugin: 'com.android.application'

def twaManifest = [
    applicationId: 'org.chromium.twa.svgomg',
    hostName: 'svgomg.firebaseapp.com', // The domain being opened in the TWA.
    launchUrl: '/', // The start path for the TWA. Must be relative to the domain.
    name: 'SVGOMG TWA', // The name shown on the Android Launcher.
    themeColor: '#303F9F', // The color used for the status bar.
    navigationColor: '#303F9F', // The color used for the navigation bar.
    backgroundColor: '#bababa', // The color used for the splash screen background.
    enableNotifications: false, // Set to true to enable notification delegation.
    // Add shortcuts for your app here. Every shortcut must include the following fields:
    // - name: String that will show up in the shortcut.
    // - short_name: Shorter string used if |name| is too long.
    // - url: Absolute path of the URL to launch the app with (e.g '/create').
    // - icon: Name of the resource in the drawable folder to use as an icon.
    shortcuts: [
        // Insert shortcuts here, for example:
        // [name: 'Open SVG', short_name: 'Open', url: '/open', icon: 'splash']
    ],
    // The duration of fade out animation in milliseconds to be played when removing splash screen.
    splashScreenFadeOutDuration: 300
]

android {
    compileSdkVersion 29
    defaultConfig {
        applicationId twaManifest.applicationId
        minSdkVersion 16
        targetSdkVersion 29
        versionCode 3
        versionName "2.0.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

        // The name for the application on the Android Launcher
        resValue "string", "appName", twaManifest.name

        // The URL that will be used when launching the TWA from the Android Launcher
        def launchUrl = "https://" + twaManifest.hostName + twaManifest.launchUrl
        resValue "string", "launchUrl", launchUrl

        // The URL that will be opened as a Desktop PWA when the TWA is installed and
        // run on ChromeOS. This will probably give a better user experience for non-mobile
        // devices, but will not include any platform-specific Android interaction.
        resValue "string", "crosLaunchUrl", launchUrl

        // The hostname is used when building the intent-filter, so the TWA is able to
        // handle Intents to open https://svgomg.firebaseapp.com.
        resValue "string", "hostName", twaManifest.hostName

        // This variable below expresses the relationship between the app and the site,
        // as documented in the TWA documentation at
        // https://developers.google.com/web/updates/2017/10/using-twa#set_up_digital_asset_links_in_an_android_app
        // and is injected into the AndroidManifest.xml
        resValue "string", "assetStatements", """
            [{
                "relation": ["delegate_permission/common.handle_all_urls"],
                "target": {
                    "namespace": "web",
                    "site": "https://$twaManifest.hostName"
                }
            }]"""

        // This attribute sets the status bar color for the TWA. It can be either set here or in
        // `res/values/colors.xml`. Setting in both places is an error and the app will not
        // compile. If not set, the status bar color defaults to #FFFFFF - white.
        resValue "color", "colorPrimary", twaManifest.themeColor

        // This attribute sets the navigation bar color for the TWA. It can be either set here or in
        // `res/values/colors.xml`. Setting in both places is an error and the app will not
        // compile. If not set, the navigation bar color defaults to #FFFFFF - white.
        resValue "color", "navigationColor", twaManifest.navigationColor

        // Sets the color for the background used for the splash screen when launching the
        // Trusted Web Activity.
        resValue "color", "backgroundColor", twaManifest.backgroundColor

        // Defines a provider authority fot the Splash Screen
        resValue "string", "providerAuthority", twaManifest.applicationId + '.fileprovider'

        // The enableNotification resource is used to enable or disable the
        // TrustedWebActivityService, by changing the android:enabled and android:exported
        // attributes
        resValue "bool", "enableNotification", twaManifest.enableNotifications.toString()

        twaManifest.shortcuts.eachWithIndex { shortcut, index ->
            resValue "string", "shortcut_name_$index", "$shortcut.name"
            resValue "string", "shortcut_short_name_$index", "$shortcut.short_name"
        }

        // The splashScreenFadeOutDuration resource is used to set the duration of fade out animation in milliseconds
        // to be played when removing splash screen. The default is 0 (no animation).
        resValue "integer", "splashScreenFadeOutDuration", twaManifest.splashScreenFadeOutDuration.toString()
    }
    buildTypes {
        release {
            minifyEnabled true
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}

task generateShorcutsFile {
    assert twaManifest.shortcuts.size() < 5, "You can have at most 4 shortcuts."
    twaManifest.shortcuts.eachWithIndex { s, i ->
        assert s.name != null, 'Missing `name` in shortcut #' + i
        assert s.short_name != null, 'Missing `short_name` in shortcut #' + i
        assert s.url != null, 'Missing `icon` in shortcut #' + i
        assert s.icon != null, 'Missing `url` in shortcut #' + i
    }

    def shortcutsFile = new File("$projectDir/src/main/res/xml", "shortcuts.xml")

    def xmlWriter = new StringWriter()
    def xmlMarkup = new MarkupBuilder(new IndentPrinter(xmlWriter, "    ", true))

    xmlMarkup
        .'shortcuts'('xmlns:android': 'http://schemas.android.com/apk/res/android') {
            twaManifest.shortcuts.eachWithIndex { s, i ->
                'shortcut'(
                        'android:shortcutId': 'shortcut' + i,
                        'android:enabled': 'true',
                        'android:icon': '@drawable/' + s.icon,
                        'android:shortcutShortLabel': '@string/shortcut_short_name_' + i,
                        'android:shortcutLongLabel': '@string/shortcut_name_' + i) {
                    'intent'(
                            'android:action': 'android.intent.action.MAIN',
                            'android:targetPackage': twaManifest.applicationId,
                            'android:targetClass': 'com.google.androidbrowserhelper.trusted.LauncherActivity',
                            'android:data': 'https://' + twaManifest.hostName + s.url)
                    'categories'('android:name': 'android.intent.category.LAUNCHER')
                }
            }
        }
    shortcutsFile.text = xmlWriter.toString() + '\n'
}

preBuild.dependsOn(generateShorcutsFile)

dependencies {
    implementation fileTree(include: ['*.jar'], dir: 'libs')
    implementation 'com.google.androidbrowserhelper:androidbrowserhelper:1.1.0'
}