1 files changed, 69 insertions, 2 deletions

diff --git a/app/src/main/java/de/danoeh/antennapod/fragment/preferences/AutoDownloadPreferencesFragment.java b/app/src/main/java/de/danoeh/antennapod/fragment/preferences/AutoDownloadPreferencesFragment.java
index a04615a00..d0c209326 100644
--- a/app/src/main/java/de/danoeh/antennapod/fragment/preferences/AutoDownloadPreferencesFragment.java
+++ b/app/src/main/java/de/danoeh/antennapod/fragment/preferences/AutoDownloadPreferencesFragment.java
@@ -1,29 +1,41 @@
 package de.danoeh.antennapod.fragment.preferences;
 
+import android.Manifest;
 import android.app.Activity;
 import android.content.Context;
+import android.content.pm.PackageManager;
 import android.content.res.Resources;
 import android.net.wifi.WifiConfiguration;
 import android.net.wifi.WifiManager;
+import android.os.Build;
 import android.os.Bundle;
+import android.support.annotation.NonNull;
+import android.support.v4.content.ContextCompat;
 import android.support.v7.preference.CheckBoxPreference;
 import android.support.v7.preference.ListPreference;
 import android.support.v7.preference.Preference;
 import android.support.v7.preference.PreferenceFragmentCompat;
 import android.support.v7.preference.PreferenceScreen;
 import android.util.Log;
-import de.danoeh.antennapod.R;
-import de.danoeh.antennapod.core.preferences.UserPreferences;
 
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
+import de.danoeh.antennapod.R;
+import de.danoeh.antennapod.core.preferences.UserPreferences;
+
 public class AutoDownloadPreferencesFragment extends PreferenceFragmentCompat {
     private static final String TAG = "AutoDnldPrefFragment";
+
+    private static final int LOCATION_PERMISSION_REQUEST_CODE = 1;
+    private static final String PREF_KEY_LOCATION_PERMISSION_REQUEST_PROMPT = "prefAutoDownloadWifiFilterAndroid10PermissionPrompt";
+
     private CheckBoxPreference[] selectedNetworks;
 
+    private Preference prefPermissionRequestPromptOnAndroid10 = null;
+
     @Override
     public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
         addPreferencesFromResource(R.xml.preferences_autodownload);
@@ -175,10 +187,65 @@ public class AutoDownloadPreferencesFragment extends PreferenceFragmentCompat {
     }
 
     private void setSelectedNetworksEnabled(boolean b) {
+        if (showPermissionRequestPromptOnAndroid10IfNeeded(b)) {
+            return;
+        }
+
         if (selectedNetworks != null) {
             for (Preference p : selectedNetworks) {
                 p.setEnabled(b);
             }
         }
     }
+
+    @Override
+    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        if (requestCode != LOCATION_PERMISSION_REQUEST_CODE) {
+            return;
+        }
+        if (permissions.length > 0 && permissions[0].equals(Manifest.permission.ACCESS_FINE_LOCATION) &&
+                grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
+            buildAutodownloadSelectedNetworksPreference();
+        }
+    }
+
+    private boolean showPermissionRequestPromptOnAndroid10IfNeeded(boolean wifiFilterEnabled) {
+        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.P) {
+            return false;
+        }
+
+        // Cases Android 10(Q) or later
+        if (prefPermissionRequestPromptOnAndroid10 != null) {
+            getPreferenceScreen().removePreference(prefPermissionRequestPromptOnAndroid10);
+            prefPermissionRequestPromptOnAndroid10 = null;
+        }
+
+        if (ContextCompat.checkSelfPermission(requireContext(), Manifest.permission.ACCESS_FINE_LOCATION)
+                == PackageManager.PERMISSION_GRANTED) {
+            return false;
+        }
+
+        // Case location permission not yet granted, permission-specific UI is needed
+        if (!wifiFilterEnabled) {
+            // Don't show the UI when WiFi filter disabled.
+            // it still return true, so that the caller knows
+            // it does not have required permission, and will not invoke codes that require so.
+            return true;
+        }
+
+        Preference pref = new Preference(requireActivity());
+        pref.setKey(PREF_KEY_LOCATION_PERMISSION_REQUEST_PROMPT);
+        pref.setTitle(R.string.autodl_wifi_filter_permission_title);
+        pref.setSummary(R.string.autodl_wifi_filter_permission_message);
+        pref.setIcon(R.drawable.ic_warning_red);
+        pref.setOnPreferenceClickListener(preference -> {
+            requestPermissions(new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, LOCATION_PERMISSION_REQUEST_CODE);
+            return true;
+        });
+        pref.setPersistent(false);
+        getPreferenceScreen().addPreference(pref);
+        prefPermissionRequestPromptOnAndroid10 = pref;
+        return true;
+    }
+
 }