dialog to enable notification access

app/src/main/java/net/headlezz/notificationlogger/MainActivity.java

@@ -14,6 +14,7 @@ import android.view.MenuItem;
 import android.view.View;
 
 import net.headlezz.notificationlogger.createnotification.NotificationCreationFragment;
+import net.headlezz.notificationlogger.logger.LoggerUtils;
 import net.headlezz.notificationlogger.presenter.LoggerWarningPresenter;
 
 import butterknife.Bind;
@@ -59,6 +60,8 @@ public class MainActivity extends AppCompatActivity implements SharedPreferences
     @Override
     protected void onResume() {
         super.onResume();
+        if(!LoggerUtils.isLoggerRunning())
+            LoggerUtils.buildNotificationAccessDialog(this).show();
         if(getSupportFragmentManager().getBackStackEntryCount() > 0)
             mFAB.setVisibility(View.GONE);
     }

app/src/main/java/net/headlezz/notificationlogger/logger/LoggerUtils.java

@@ -0,0 +1,36 @@
+package net.headlezz.notificationlogger.logger;
+
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.support.v7.app.AlertDialog;
+
+import net.headlezz.notificationlogger.R;
+
+public class LoggerUtils {
+
+    public static void openNotificationSystemSettings(Context context) {
+        Intent intent = new Intent("android.settings.ACTION_NOTIFICATION_LISTENER_SETTINGS");
+        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
+        context.startActivity(intent);
+    }
+
+    public static boolean isLoggerRunning() {
+        return NotificationLoggerService.isRunning;
+    }
+
+    public static AlertDialog buildNotificationAccessDialog(final Context context) {
+        return new AlertDialog.Builder(context)
+                .setTitle(context.getString(R.string.main_dialog_enable_notification_access_title))
+                .setMessage(context.getString(R.string.main_dialog_enable_notification_access_message))
+                .setPositiveButton(R.string.main_dialog_enable_notification_access_positive, new DialogInterface.OnClickListener() {
+                    @Override
+                    public void onClick(DialogInterface dialog, int which) {
+                        openNotificationSystemSettings(context);
+                    }
+                })
+                .setNegativeButton(R.string.main_dialog_enable_notification_access_negative, null)
+                .create();
+    }
+
+}

app/src/main/java/net/headlezz/notificationlogger/logger/NotificationLoggerService.java

@@ -18,7 +18,14 @@ import timber.log.Timber;
 
 public class NotificationLoggerService extends NotificationListenerService implements SharedPreferences.OnSharedPreferenceChangeListener {
 
+    /**
+     * true if logger is enabled in system settings
+     */
     public static boolean isRunning = false;
+
+    /**
+     * true if logger is enabled in app settings
+     */
     public static boolean isEnabled = true;
 
     SharedPreferences mSharedPrefs;

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

@@ -5,6 +5,10 @@
 
     <string name="main_snack_logging_disabled_warning">Logging is disabled.</string>
     <string name="main_snack_logging_disabled_warning_action">Enable</string>
+    <string name="main_dialog_enable_notification_access_title">Enable Notification Access</string>
+    <string name="main_dialog_enable_notification_access_message">In order to log notifcations, this app needs access to your notification system.</string>
+    <string name="main_dialog_enable_notification_access_positive">Open settings</string>
+    <string name="main_dialog_enable_notification_access_negative">Cancel</string>
 
     <string name="pref_category_notification_settings">Notification Settings</string>
     <string name="pref_category_support">Support</string>