add warning about missing feature file

Author: vetruvet

app/src/main/java/com/otaupdater/AboutTab.java

@@ -20,6 +20,7 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.net.Uri;
 import android.os.Bundle;
@@ -46,10 +47,13 @@ public class AboutTab extends ListFragment {
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        Context ctx = getActivity().getApplicationContext();
+        PackageManager pm = ctx.getPackageManager();
+
         PackageInfo pInfo = null;
         try {
-            Context ctx = getActivity().getApplicationContext();
-            pInfo = ctx.getPackageManager().getPackageInfo(ctx.getPackageName(), 0);
+            pInfo = pm.getPackageInfo(ctx.getPackageName(), 0);
+
         } catch (NameNotFoundException e) {
             e.printStackTrace();
         }
@@ -67,6 +71,13 @@ public void onCreate(Bundle savedInstanceState) {
         item.put(KEY_SUMMARY, version);
         DATA.add(item);
 
+        if (!pm.hasSystemFeature(Config.OTA_FEATURE_KEY)) {
+            item = new HashMap<String, String>();
+            item.put(KEY_TITLE, getString(R.string.about_ota_feature_missing_title));
+            item.put(KEY_SUMMARY, getString(R.string.about_ota_feature_missing_summary));
+            DATA.add(item);
+        }
+
         item = new HashMap<String, String>();
         item.put(KEY_TITLE, getString(R.string.about_license_title));
         item.put(KEY_SUMMARY, "");

app/src/main/java/com/otaupdater/utils/Config.java

@@ -47,6 +47,7 @@ public class Config {
     public static final String GCM_SENDER_ID = "1068482628480";
     public static final String OAUTH_CLIENT_ID = "1068482628480-jsufug7klk4b4ab2v6f83dtp5q38k74t.apps.googleusercontent.com";
 
+    public static final String OTA_FEATURE_KEY = "com.otaupdater.ota_feature";
     public static final String PROKEY_SKU = "prokey";
 
     public static final long MIN_PING_TIME = 604800000; // 1 week in ms

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

@@ -109,6 +109,8 @@
     <string name="about_ota_summary">Copyright © 2014 - OTA Update Center\nFully open-source\nTap to visit our website</string>
     <string name="about_version_title">Version</string>
     <string name="about_version_unknown">Unknown Version (error in package manager)</string>
+    <string name="about_ota_feature_missing_title">Missing OTA Feature File!!</string>
+    <string name="about_ota_feature_missing_summary">The feature XML file is missing from this ROM/Kernel. Without this file, you will not be able to update this app via the Play Store.\n\nPlease contact your ROM/Kernel developer and kindly ask them to add the file. Instructions are available on our website on how to do this.</string>
     <string name="about_license_title">Open-Source License</string>
     <string name="about_contrib_title">Contributors</string>
     <string name="about_feedback_title">Feedback</string>