Feature/about kotlin

app/build.gradle

@@ -3,6 +3,7 @@ import com.github.spotbugs.snom.SpotBugsTask
 plugins {
     id 'com.android.application'
     id 'com.github.spotbugs'
+    id 'org.jetbrains.kotlin.android'
 }
 
 spotbugs {
@@ -127,3 +128,7 @@ tasks.withType(SpotBugsTask) {
         html.enabled = true
     }
 }
+
+tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).configureEach {
+    kotlinOptions.jvmTarget = "11"
+}

app/src/main/java/protect/card_locker/AboutActivity.kt

@@ -0,0 +1,102 @@
+package protect.card_locker
+
+import android.os.Bundle
+import android.view.MenuItem
+import android.view.View
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import protect.card_locker.databinding.AboutActivityBinding
+
+class AboutActivity : CatimaAppCompatActivity() {
+    private var binding: AboutActivityBinding? = null
+    private var content: AboutContent? = null
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+
+        val binding = AboutActivityBinding.inflate(layoutInflater)
+            .also { this.binding = it }
+        val content = AboutContent(this)
+            .also { this.content = it }
+
+        title = content.pageTitle
+
+        setContentView(binding.root)
+        setSupportActionBar(binding.toolbar)
+        enableToolbarBackButton()
+
+        val copyright = binding.creditsSub
+        copyright.text = content.copyright
+        val versionHistory = binding.versionHistorySub
+        versionHistory.text = content.versionHistory
+
+        binding.versionHistory.tag = "https://catima.app/changelog/"
+        binding.translate.tag = "https://hosted.weblate.org/engage/catima/"
+        binding.license.tag = "https://github.com/CatimaLoyalty/Android/blob/master/LICENSE"
+        binding.repo.tag = "https://github.com/CatimaLoyalty/Android/"
+        binding.privacy.tag = "https://catima.app/privacy-policy/"
+        binding.reportError.tag = "https://github.com/CatimaLoyalty/Android/issues"
+        binding.rate.tag = "https://play.google.com/store/apps/details?id=me.hackerchick.catima"
+
+        bindClickListeners()
+    }
+
+    override fun onOptionsItemSelected(item: MenuItem): Boolean {
+        val id = item.itemId
+        if (id == android.R.id.home) {
+            finish()
+        }
+        return super.onOptionsItemSelected(item)
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        content?.destroy()
+        content = null
+        clearClickListeners()
+        binding = null
+    }
+
+    private fun bindClickListeners() {
+        val binding = binding!!
+
+        val openExternalBrowser = View.OnClickListener { view: View ->
+            val tag = view.tag
+            if (tag is String && tag.startsWith("https://")) {
+                OpenWebLinkHandler().openBrowser(this, tag)
+            }
+        }
+
+        binding.versionHistory.setOnClickListener(openExternalBrowser)
+        binding.translate.setOnClickListener(openExternalBrowser)
+        binding.license.setOnClickListener(openExternalBrowser)
+        binding.repo.setOnClickListener(openExternalBrowser)
+        binding.privacy.setOnClickListener(openExternalBrowser)
+        binding.reportError.setOnClickListener(openExternalBrowser)
+        binding.rate.setOnClickListener(openExternalBrowser)
+        binding.credits.setOnClickListener { showCredits() }
+    }
+
+    private fun clearClickListeners() {
+        val binding = binding!!
+        binding.versionHistory.setOnClickListener(null)
+        binding.translate.setOnClickListener(null)
+        binding.license.setOnClickListener(null)
+        binding.repo.setOnClickListener(null)
+        binding.privacy.setOnClickListener(null)
+        binding.reportError.setOnClickListener(null)
+        binding.rate.setOnClickListener(null)
+        binding.credits.setOnClickListener(null)
+    }
+
+    private fun showCredits() {
+        val content = content!!
+        MaterialAlertDialogBuilder(this)
+            .setTitle(R.string.credits)
+            .setMessage(content.contributorInfo)
+            .setPositiveButton(R.string.ok, null)
+            .show()
+    }
+
+    companion object {
+        private const val TAG = "Catima"
+    }
+}