Support detecting whether device is a tablet and use that to determine whether to enforce portrait orientation

forge-gui-android/src/forge/app/Main.java

@@ -8,6 +8,7 @@ import android.content.ClipboardManager;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
+import android.content.res.Configuration;
 import android.net.ConnectivityManager;
 import android.net.NetworkInfo;
 import android.net.Uri;
@@ -29,13 +30,15 @@ public class Main extends AndroidApplication {
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        //setup portrait orientation
+        AndroidAdapter adapter = new AndroidAdapter(this.getContext());
+
+        //enforce portrait orientation for non-tablet screens
+        if (!adapter.isTablet) {
             this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
             if (Build.VERSION.SDK_INT > 8) { //use dual-side portrait mode if supported
                 this.setRequestedOrientation(7);
             }
-
-        AndroidAdapter adapter = new AndroidAdapter();
+        }
 
         //establish assets directory
         if (!Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
@@ -88,8 +91,15 @@ public class Main extends AndroidApplication {
     }
 
     private class AndroidAdapter implements IDeviceAdapter {
+        private final boolean isTablet;
         private final ConnectivityManager connManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
 
+        private AndroidAdapter(Context context) {
+            isTablet = (context.getResources().getConfiguration().screenLayout
+                    & Configuration.SCREENLAYOUT_SIZE_MASK)
+                    >= Configuration.SCREENLAYOUT_SIZE_LARGE;
+        }
+
         @Override
         public boolean isConnectedToInternet() {
             return Boolean.TRUE.equals(ThreadUtil.executeWithTimeout(new Callable<Boolean>() {
@@ -146,5 +156,10 @@ public class Main extends AndroidApplication {
                             | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS); // hide (remove, in this case) task from recents
             startActivity(relaunch);
         }
+
+        @Override
+        public boolean isTablet() {
+            return isTablet;
+        }
     }
 }

forge-gui-mobile-dev/src/forge/app/Main.java

@@ -58,5 +58,10 @@ public class Main {
         public void exit() {
             Gdx.app.exit(); //can just use Gdx.app.exit for desktop
         }
+
+        @Override
+        public boolean isTablet() {
+            return true; //treat desktop the same as a tablet
+        }
     }
 }

forge-gui/src/main/java/forge/interfaces/IDeviceAdapter.java

@@ -3,6 +3,7 @@ package forge.interfaces;
 public interface IDeviceAdapter {
     boolean isConnectedToInternet();
     boolean isConnectedToWifi();
+    boolean isTablet();
     String getDownloadsDir();
     boolean openFile(String filename);
     void exit();