1 files changed, 54 insertions, 0 deletions
diff --git a/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/renderer/glsurfaceview/MapboxGLSurfaceView.java b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/renderer/glsurfaceview/MapboxGLSurfaceView.java
new file mode 100644
index 0000000000..ccdbc58220
--- /dev/null
+++ b/platform/android/MapboxGLAndroidSDK/src/main/java/com/mapbox/mapboxsdk/maps/renderer/glsurfaceview/MapboxGLSurfaceView.java
@@ -0,0 +1,54 @@
+package com.mapbox.mapboxsdk.maps.renderer.glsurfaceview;
+
+import android.content.Context;
+import android.opengl.GLSurfaceView;
+import android.support.annotation.NonNull;
+import android.util.AttributeSet;
+
+/**
+ * {@link GLSurfaceView} extension that notifies a listener when the view is detached from window,
+ * which is the point of destruction of the GL thread.
+ */
+public class MapboxGLSurfaceView extends GLSurfaceView {
+
+  private OnGLSurfaceViewDetachedListener detachedListener;
+
+  public MapboxGLSurfaceView(Context context) {
+    super(context);
+  }
+
+  public MapboxGLSurfaceView(Context context, AttributeSet attrs) {
+    super(context, attrs);
+  }
+
+  @Override
+  protected void onDetachedFromWindow() {
+    if (detachedListener != null) {
+      detachedListener.onGLSurfaceViewDetached();
+    }
+    super.onDetachedFromWindow();
+  }
+
+  /**
+   * Set a listener that gets notified when the view is detached from window.
+   *
+   * @param detachedListener listener
+   */
+  public void setDetachedListener(@NonNull OnGLSurfaceViewDetachedListener detachedListener) {
+    if (this.detachedListener != null) {
+      throw new IllegalArgumentException("Detached from window listener has been already set.");
+    }
+    this.detachedListener = detachedListener;
+  }
+
+  /**
+   * Listener interface that notifies when a {@link MapboxGLSurfaceView} is detached from window.
+   */
+  public interface OnGLSurfaceViewDetachedListener {
+
+    /**
+     * Called when a {@link MapboxGLSurfaceView} is detached from window.
+     */
+    void onGLSurfaceViewDetached();
+  }
+}