feat(android): detect foldables

android/modules/app/src/java/ti/modules/titanium/app/AndroidModule.java

@@ -19,7 +19,9 @@
 import android.app.Activity;
 import android.content.Intent;
 import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
 import android.content.pm.PackageManager.NameNotFoundException;
+import android.os.Build;
 
 @Kroll.module(parentModule = AppModule.class)
 public class AndroidModule extends KrollModule
@@ -70,6 +72,17 @@ public int getAppVersionCode()
 		return appVersionCode;
 	}
 
+	@Kroll.getProperty
+	public boolean getIsFoldable()
+	{
+		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
+			return TiApplication.getInstance().getPackageManager()
+				.hasSystemFeature(PackageManager.FEATURE_SENSOR_HINGE_ANGLE);
+		} else {
+			return false;
+		}
+	}
+
 	@Kroll.getProperty
 	public IntentProxy getLaunchIntent()
 	{

android/titanium/build.gradle

@@ -293,6 +293,7 @@ dependencies {
 	implementation 'androidx.vectordrawable:vectordrawable-animated:1.1.0'
 	implementation 'androidx.viewpager:viewpager:1.0.0'
 	implementation 'androidx.annotation:annotation:1.7.1'
+	implementation 'androidx.window:window-java:1.3.0'
 
 	// Google's "Material Components" themed UI library.
 	implementation "com.google.android.material:material:${project.ext.tiMaterialLibVersion}"

android/titanium/src/java/org/appcelerator/titanium/TiBaseActivity.java

@@ -9,6 +9,7 @@
 import java.lang.ref.WeakReference;
 import java.util.HashMap;
 import java.util.Iterator;
+import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
 
 import org.appcelerator.kroll.KrollDict;
@@ -48,6 +49,7 @@
 
 import android.app.Activity;
 
+import androidx.annotation.RequiresApi;
 import androidx.appcompat.app.ActionBar;
 import androidx.appcompat.app.AppCompatActivity;
 import android.app.Dialog;
@@ -69,6 +71,12 @@
 import androidx.annotation.NonNull;
 import androidx.appcompat.app.AppCompatDelegate;
 import androidx.appcompat.widget.Toolbar;
+import androidx.core.util.Consumer;
+import androidx.window.java.layout.WindowInfoTrackerCallbackAdapter;
+import androidx.window.layout.DisplayFeature;
+import androidx.window.layout.FoldingFeature;
+import androidx.window.layout.WindowInfoTracker;
+import androidx.window.layout.WindowLayoutInfo;
 
 import android.text.Spannable;
 import android.text.SpannableStringBuilder;
@@ -107,6 +115,10 @@ public abstract class TiBaseActivity extends AppCompatActivity implements TiActi
 	private TiActivitySafeAreaMonitor safeAreaMonitor;
 	private Context baseContext;
 	public boolean keyboardVisible = false;
+	private static boolean hasWindowLayoutInfoListener = false;
+	private WindowInfoTrackerCallbackAdapter windowInfoTracker;
+	private final LayoutStateChangeCallback layoutStateChangeCallback =
+		new LayoutStateChangeCallback();
 	/**
 	 * Callback to be invoked when the TiBaseActivity.onRequestPermissionsResult() has been called,
 	 * providing the results of a requestPermissions() call. Instances of this interface are to
@@ -867,6 +879,8 @@ public void onKeyboardChanged(boolean isVisible, int width, int height, Insets k
 			}
 		}
 		setCustomActionBar();
+
+		windowInfoTracker = new WindowInfoTrackerCallbackAdapter(WindowInfoTracker.getOrCreate(this));
 	}
 
 	private void setCustomActionBar()
@@ -1561,6 +1575,11 @@ protected void onStart()
 		}
 
 		applyNightMode();
+		if (!hasWindowLayoutInfoListener) {
+			windowInfoTracker.addWindowLayoutInfoListener(
+				TiApplication.getAppRootOrCurrentActivity(), Runnable::run, layoutStateChangeCallback);
+			hasWindowLayoutInfoListener = true;
+		}
 	}
 
 	@Override
@@ -1587,6 +1606,11 @@ protected void onStop()
 				}
 			}
 		}
+
+		if (hasWindowLayoutInfoListener) {
+			windowInfoTracker.removeWindowLayoutInfoListener(layoutStateChangeCallback);
+			hasWindowLayoutInfoListener = false;
+		}
 	}
 
 	@Override
@@ -1957,4 +1981,39 @@ public Context getInitialBaseContext()
 	{
 		return baseContext;
 	}
+
+	@RequiresApi(api = Build.VERSION_CODES.N)
+	class LayoutStateChangeCallback implements Consumer<WindowLayoutInfo>
+	{
+		@Override
+		public void accept(WindowLayoutInfo newLayoutInfo)
+		{
+			TiBaseActivity.this.runOnUiThread(() -> {
+				List<DisplayFeature> displayFeatures = newLayoutInfo.getDisplayFeatures();
+				if (displayFeatures.toArray().length == 0) {
+					// closed
+					KrollDict kd = new KrollDict();
+					String orientation = TiApplication.getInstance().getResources().getConfiguration()
+						.orientation == Configuration.ORIENTATION_LANDSCAPE ? "HORIZONTAL" : "VERTICAL";
+					kd.put("state", "CLOSED");
+					kd.put("occlusionType", "NONE");
+					kd.put("orientation", orientation);
+					kd.put("isSeparating", false);
+					TiApplication.getInstance().fireAppEvent("windowState", kd);
+				} else {
+					// other states
+					for (DisplayFeature feature : displayFeatures) {
+						if (feature instanceof FoldingFeature foldingFeature) {
+							KrollDict kd = new KrollDict();
+							kd.put("state", foldingFeature.getState().toString());
+							kd.put("occlusionType", foldingFeature.getOcclusionType().toString());
+							kd.put("orientation", foldingFeature.getOrientation().toString());
+							kd.put("isSeparating", foldingFeature.isSeparating());
+							TiApplication.getInstance().fireAppEvent("windowState", kd);
+						}
+					}
+				}
+			});
+		}
+	}
 }