Install app updates automatically in the background

app/src/main/java/io/eelo/appinstaller/application/ApplicationActivity.kt

@@ -419,7 +419,7 @@ class ApplicationActivity : AppCompatActivity(), ApplicationStateListener,
                     Snackbar.LENGTH_LONG).show()
             return
         }
-        application.buttonClicked(this)
+        application.buttonClicked(this, this)
     }
 
     @SuppressLint("SetTextI18n")
@@ -542,7 +542,7 @@ class ApplicationActivity : AppCompatActivity(), ApplicationStateListener,
     override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
         if (requestCode == Constants.STORAGE_PERMISSION_REQUEST_CODE) {
             if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
-                application.buttonClicked(this)
+                application.buttonClicked(this, this)
             } else if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_DENIED) {
                 Snackbar.make(container, R.string.error_storage_permission_denied,
                         Snackbar.LENGTH_LONG).show()

app/src/main/java/io/eelo/appinstaller/application/ApplicationViewHolder.kt

@@ -47,7 +47,7 @@ class ApplicationViewHolder(private val activity: Activity, private val view: Vi
                         Error.APK_UNAVAILABLE.description),
                         Snackbar.LENGTH_LONG).show()
             } else {
-                application?.buttonClicked(activity)
+                application?.buttonClicked(activity, activity)
             }
         }
     }

app/src/main/java/io/eelo/appinstaller/application/SmallApplicationViewHolder.kt

@@ -42,7 +42,7 @@ class SmallApplicationViewHolder(private val activity: Activity, private val vie
                         Error.APK_UNAVAILABLE.description),
                         Snackbar.LENGTH_LONG).show()
             } else {
-                application?.buttonClicked(activity)
+                application?.buttonClicked(activity, activity)
             }
         }
     }

app/src/main/java/io/eelo/appinstaller/application/model/Application.kt

@@ -55,24 +55,28 @@ class Application(val packageName: String, private val applicationManager: Appli
     }
 
     @Synchronized
-    fun buttonClicked(activity: Activity) {
+    fun buttonClicked(context: Context, activity: Activity?) {
         when (stateManager.state) {
-            INSTALLED -> info.launch(activity)
+            INSTALLED -> info.launch(context)
             NOT_UPDATED, NOT_DOWNLOADED -> {
-                if (canWriteStorage(activity)) {
-                    applicationManager.install(activity, this)
+                if (activity != null) {
+                    if (canWriteStorage(activity)) {
+                        applicationManager.install(context, this)
+                    }
+                } else {
+                    applicationManager.install(context, this)
                 }
             }
             INSTALLING -> {
                 if (downloader != null) {
                     downloader?.cancelDownload()
                 } else {
-                    onDownloadComplete(activity, DownloadManager.STATUS_FAILED)
+                    onDownloadComplete(context, DownloadManager.STATUS_FAILED)
                 }
                 return
             }
         }
-        checkForStateUpdate(activity)
+        checkForStateUpdate(context)
     }
 
     private fun canWriteStorage(activity: Activity): Boolean {

app/src/main/java/io/eelo/appinstaller/updates/UpdatesFragment.kt

@@ -19,7 +19,6 @@ import io.eelo.appinstaller.application.model.State
 import io.eelo.appinstaller.applicationmanager.ApplicationManager
 import io.eelo.appinstaller.common.ApplicationListAdapter
 import io.eelo.appinstaller.updates.viewModel.UpdatesViewModel
-import io.eelo.appinstaller.utils.Common
 
 class UpdatesFragment : Fragment() {
     private lateinit var updatesViewModel: UpdatesViewModel
@@ -53,7 +52,7 @@ class UpdatesFragment : Fragment() {
         updateAll.setOnClickListener {
             applicationList.forEach { application ->
                 if (application.state == State.NOT_UPDATED) {
-                    application.buttonClicked(activity!!)
+                    application.buttonClicked(context!!, activity!!)
                 }
             }
         }

app/src/main/java/io/eelo/appinstaller/updates/model/UpdatesWorker.kt

 package io.eelo.appinstaller.updates.model
 
+import android.Manifest
 import android.content.Context
+import android.content.pm.PackageManager
+import android.net.ConnectivityManager
+import android.net.NetworkCapabilities
 import android.os.AsyncTask
 import android.preference.PreferenceManager
 import android.util.Log
@@ -8,8 +12,10 @@ import androidx.work.Worker
 import androidx.work.WorkerParameters
 import io.eelo.appinstaller.R
 import io.eelo.appinstaller.application.model.Application
+import io.eelo.appinstaller.application.model.State
 import io.eelo.appinstaller.applicationmanager.ApplicationManager
 import io.eelo.appinstaller.updates.UpdatesNotifier
+import io.eelo.appinstaller.utils.Common
 import io.eelo.appinstaller.utils.Constants
 
 class UpdatesWorker(context: Context, params: WorkerParameters) : Worker(context, params),
@@ -68,9 +74,44 @@ class UpdatesWorker(context: Context, params: WorkerParameters) : Worker(context
                         applications.size,
                         installAutomatically)
             }
+            if (installAutomatically && canWriteStorage(applicationContext)) {
+                if (wifiOnly) {
+                    if (isConnectedToUnmeteredNetwork(applicationContext)) {
+                        applications.forEach {
+                            if (it.state == State.NOT_UPDATED) {
+                                Log.i(TAG, "Updating ${it.packageName}")
+                                it.buttonClicked(applicationContext, null)
+                            }
+                        }
+                    }
+                } else {
+                    applications.forEach {
+                        if (it.state == State.NOT_UPDATED) {
+                            Log.i(TAG, "Updating ${it.packageName}")
+                            it.buttonClicked(applicationContext, null)
+                        }
+                    }
+                }
+            }
         }
         synchronized(blocker) {
             blocker.notify()
         }
     }
+
+    private fun canWriteStorage(context: Context) = !(android.os.Build.VERSION.SDK_INT >= 23 &&
+            context.checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) !=
+            PackageManager.PERMISSION_GRANTED)
+
+    private fun isConnectedToUnmeteredNetwork(context: Context): Boolean {
+        val connectivityManager = context.getSystemService(Context.CONNECTIVITY_SERVICE) as
+                ConnectivityManager
+        return if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.M) {
+            val network = connectivityManager.activeNetwork
+            val capabilities = connectivityManager.getNetworkCapabilities(network)
+            capabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)
+        } else {
+            Common.isNetworkAvailable(context)
+        }
+    }
 }

app/src/main/res/values/strings.xml

@@ -70,7 +70,7 @@
     <string name="preference_updates_title">Updates</string>
     <string name="preference_update_interval_default">24</string>
     <string name="preference_update_interval_title">Update check interval</string>
-    <string name="preference_update_wifi_only_title">Only on Wi-Fi</string>
+    <string name="preference_update_wifi_only_title">Only on un-metered networks</string>
     <string name="preference_update_wifi_only_description">Update apps automatically only on
         un-metered networks such as Wi-Fi</string>
     <string name="preference_update_install_automatically_title">Automatically install updates</string>