Add detection and a pop-up of vendor specific bugs.

Some device manufacturers (I'm looking at you Xiaomi!) made some changes
to Android that break content providers and other background apps. This
affects a few apps, including DAVdroid from which EteSync is derived.

This change attempts to automatically detect such devices, alert users
and point them to the relevant FAQ entry.

I've already had to deal with a few bug reports stemming from this
issue, so it's good to have this handled automatically.

This addresses #22

app/src/main/java/com/etesync/syncadapter/ui/StartupDialogFragment.java

@@ -33,7 +33,8 @@ import java.util.List;
 
 public class StartupDialogFragment extends DialogFragment {
     private static final String
-            HINT_BATTERY_OPTIMIZATIONS = "BatteryOptimizations";
+            HINT_BATTERY_OPTIMIZATIONS = "BatteryOptimizations",
+            HINT_VENDOR_SPECIFIC_BUGS = "VendorSpecificBugs";
 
     private static final String ARGS_MODE = "mode";
 
@@ -41,6 +42,7 @@ public class StartupDialogFragment extends DialogFragment {
         BATTERY_OPTIMIZATIONS,
         DEVELOPMENT_VERSION,
         GOOGLE_PLAY_ACCOUNTS_REMOVED,
+        VENDOR_SPECIFIC_BUGS,
     }
 
     public static StartupDialogFragment[] getStartupDialogs(Context context) {
@@ -56,6 +58,12 @@ public class StartupDialogFragment extends DialogFragment {
                 dialogs.add(StartupDialogFragment.instantiate(Mode.BATTERY_OPTIMIZATIONS));
         }
 
+        // Vendor specific bugs
+        String manu = Build.MANUFACTURER;
+        if (!HintManager.getHintSeen(context, HINT_BATTERY_OPTIMIZATIONS) && (manu.equalsIgnoreCase("Xiaomi") || manu.equalsIgnoreCase("Huawei")) && !Build.DISPLAY.contains("lineage")) {
+            dialogs.add(StartupDialogFragment.instantiate(Mode.VENDOR_SPECIFIC_BUGS));
+        }
+
         Collections.reverse(dialogs);
         return dialogs.toArray(new StartupDialogFragment[dialogs.size()]);
     }
@@ -120,6 +128,28 @@ public class StartupDialogFragment extends DialogFragment {
                             }
                         })
                         .create();
+            case VENDOR_SPECIFIC_BUGS:
+                return new AlertDialog.Builder(getActivity())
+                        .setTitle(R.string.startup_vendor_specific_bugs)
+                        .setMessage(R.string.startup_vendor_specific_bugs_message)
+                        .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                            @Override
+                            public void onClick(DialogInterface dialog, int which) {
+                            }
+                        })
+                        .setNeutralButton(R.string.startup_vendor_specific_bugs_open_faq, new DialogInterface.OnClickListener() {
+                            @Override
+                            public void onClick(DialogInterface dialog, int which) {
+                                WebViewActivity.openUrl(getContext(), Constants.faqUri.buildUpon().encodedFragment("vendor-issues").build());
+                            }
+                        })
+                        .setNegativeButton(R.string.startup_dont_show_again, new DialogInterface.OnClickListener() {
+                            @Override
+                            public void onClick(DialogInterface dialog, int which) {
+                                HintManager.setHintSeen(getContext(), HINT_VENDOR_SPECIFIC_BUGS, true);
+                            }
+                        })
+                        .create();
         }
 
         throw new IllegalArgumentException(/* illegal mode argument */);

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

@@ -32,6 +32,9 @@
     <string name="startup_development_version">EteSync Preview Release</string>
     <string name="startup_development_version_message">This is a development version of EteSync. Be aware that things may not work as expected. Please give us constructive feedback to improve EteSync.</string>
     <string name="startup_development_version_give_feedback">Give feedback</string>
+    <string name="startup_vendor_specific_bugs">Potential Vendor Bugs</string>
+    <string name="startup_vendor_specific_bugs_message">EteSync has detected you are using an Android version that may contain vendor specific bugs.\nPlease take a look at the FAQ for more information.</string>
+    <string name="startup_vendor_specific_bugs_open_faq">Open FAQ</string>
 
     <!-- AboutActivity -->
     <string name="about_license_terms">License terms</string>