implemented in-app update functionality

app/src/main/java/com/andryoga/safebox/ui/view/MainActivity.kt

@@ -6,6 +6,7 @@ import android.os.Bundle
 import android.view.MenuItem
 import android.view.View
 import android.view.WindowManager
+import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.GravityCompat
 import androidx.databinding.DataBindingUtil
@@ -20,8 +21,16 @@ import com.andryoga.safebox.common.Constants.APP_GITHUB_URL
 import com.andryoga.safebox.common.CrashlyticsKeys
 import com.andryoga.safebox.databinding.ActivityMainBinding
 import com.andryoga.safebox.ui.common.Utils.hideSoftKeyboard
+import com.andryoga.safebox.ui.view.MainActivity.Constants.AUTO_UPDATE_REQUEST_CODE
 import com.andryoga.safebox.ui.view.MainActivity.Constants.LAST_INTERACTED_TIME
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.google.android.material.snackbar.Snackbar
+import com.google.android.play.core.appupdate.AppUpdateManager
+import com.google.android.play.core.appupdate.AppUpdateManagerFactory
+import com.google.android.play.core.install.InstallStateUpdatedListener
+import com.google.android.play.core.install.model.AppUpdateType
+import com.google.android.play.core.install.model.InstallStatus
+import com.google.android.play.core.install.model.UpdateAvailability
 import com.google.android.play.core.review.ReviewInfo
 import com.google.android.play.core.review.ReviewManager
 import com.google.android.play.core.review.ReviewManagerFactory
@@ -55,8 +64,11 @@ class MainActivity : AppCompatActivity() {
     object Constants {
         const val LAST_INTERACTED_TIME = "last_interacted_time"
         const val MAX_USER_AWAY_MILLI_SECONDS = 20000L
+        const val AUTO_UPDATE_REQUEST_CODE = 11
     }
 
+    private lateinit var appUpdateManager: AppUpdateManager
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         Timber.i("on create activity")
@@ -65,6 +77,7 @@ class MainActivity : AppCompatActivity() {
         // could be USER_PREFERENCE in future
         window.addFlags(WindowManager.LayoutParams.FLAG_SECURE)
         binding = DataBindingUtil.setContentView(this, R.layout.activity_main)
+        appUpdateManager = AppUpdateManagerFactory.create(this)
 
         lastInteractionTime = savedInstanceState?.getLong(LAST_INTERACTED_TIME)
             ?: System.currentTimeMillis()
@@ -100,6 +113,44 @@ class MainActivity : AppCompatActivity() {
 
         CrashlyticsKeys(this).setDefaultKeys()
         prefetchReviewInfo()
+
+        appUpdate()
+
+    }
+
+    private fun appUpdate(){
+        val appUpdateInfoTask = appUpdateManager.appUpdateInfo
+        appUpdateInfoTask.addOnSuccessListener{ appUpdateInfo ->
+           if ( appUpdateInfo.updateAvailability() == UpdateAvailability.UPDATE_AVAILABLE
+               && appUpdateInfo.isUpdateTypeAllowed(AppUpdateType.FLEXIBLE)){
+               appUpdateManager.startUpdateFlowForResult(appUpdateInfo,AppUpdateType.FLEXIBLE, this, AUTO_UPDATE_REQUEST_CODE)
+               appUpdateManager.registerListener(listener)
+           }
+            else if ( appUpdateInfo.updateAvailability() == UpdateAvailability.UPDATE_AVAILABLE
+               && appUpdateInfo.isUpdateTypeAllowed(AppUpdateType.IMMEDIATE)){
+               appUpdateManager.startUpdateFlowForResult(appUpdateInfo,AppUpdateType.IMMEDIATE, this, AUTO_UPDATE_REQUEST_CODE)
+            }
+        }
+    }
+
+    private val listener = InstallStateUpdatedListener{ state ->
+        if (state.installStatus() == InstallStatus.DOWNLOADED){
+            snackbarForCompleteUpdate()
+        }
+    }
+
+    private fun snackbarForCompleteUpdate(){
+        Snackbar.make(findViewById(R.id.content), "App update has been downloaded", Snackbar.LENGTH_INDEFINITE).
+        setAction("Install"){
+            appUpdateManager.completeUpdate()
+        }.show()
+    }
+
+    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+        if (requestCode == AUTO_UPDATE_REQUEST_CODE){
+            if (resultCode != RESULT_OK )
+                Toast.makeText(this, "Update Failed", Toast.LENGTH_SHORT).show()
+        }
     }
 
     override fun onPause() {
@@ -109,6 +160,11 @@ class MainActivity : AppCompatActivity() {
 
     override fun onResume() {
         super.onResume()
+        appUpdateManager.appUpdateInfo.addOnSuccessListener { appUpdateInfo ->
+            if (appUpdateInfo.updateAvailability() == UpdateAvailability.DEVELOPER_TRIGGERED_UPDATE_IN_PROGRESS){
+                appUpdateManager.startUpdateFlowForResult(appUpdateInfo, AppUpdateType.IMMEDIATE, this, AUTO_UPDATE_REQUEST_CODE)
+            }
+        }
         checkUserAwayTimeout()
     }