Add canary channels

Only show if user is already on canary channels

app/src/full/java/com/topjohnwu/magisk/fragments/SettingsFragment.java

@@ -33,6 +33,7 @@ import com.topjohnwu.net.Networking;
 import com.topjohnwu.superuser.Shell;
 
 import java.io.IOException;
+import java.util.Arrays;
 import java.util.Locale;
 
 public class SettingsFragment extends BasePreferenceFragment implements Topic.Subscriber {
@@ -109,6 +110,15 @@ public class SettingsFragment extends BasePreferenceFragment implements Topic.Su
             return true;
         });
 
+        /* We only show canary channels if user is already on canary channel
+         * or the user have already chosen canary channel */
+        if (!BuildConfig.VERSION_NAME.contains("-") &&
+                (int) Config.get(Config.Key.UPDATE_CHANNEL) < Config.Value.CANARY_CHANNEL) {
+            // Remove the last 2 entries
+            CharSequence[] entries = updateChannel.getEntries();
+            updateChannel.setEntries(Arrays.copyOf(entries, entries.length - 2));
+        }
+
         setSummary();
 
         // Disable dangerous settings in secondary user

app/src/full/res/values/arrays.xml

@@ -21,6 +21,7 @@
         <item>1</item>
         <item>2</item>
         <item>3</item>
+        <item>4</item>
     </string-array>
 
     <string-array name="request_timeout">
@@ -80,6 +81,9 @@
         <item>@string/settings_update_stable</item>
         <item>@string/settings_update_beta</item>
         <item>@string/settings_update_custom</item>
+        <!-- Debug only, don't care to translate -->
+        <item>Canary</item>
+        <item>Canary (Debug)</item>
     </string-array>
 
     <string-array name="boot_formats">