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public class CustomBrowserActivity extends AppCompatActivity {
    public static final String KEY_URL = "com.sample.KEY_URL";
    private BuzzAdWebViewBuzzAdBrowserFragment webViewfragment;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_custom_browser);

        // URL을 KEY로 하여 WebView를 가지고있는 Fragment를 받아와 사용합니다.
        Intent intent = getIntent();

       BuzzAdBrowserFragment fragment = BuzzAdBrowser.getInstance(this).getFragment(intent.getStringExtra(KEY_URL));
        getSupportFragmentManager().beginTransaction().replace(R.id.browserContainer, fragment).commit();
        final BuzzAdWebView this.webView = fragment.getWebView();

        // Browser의 이벤트를 받을 수 있습니다. DeepLink가 열렸을 경우, Browser를 닫아주어야 빈 페이지가 보여지는 현상을 방지할 수 있습니다.
        BuzzAdBrowser.getInstance(this).setOnBrowserEventListener(new BuzzAdBrowser.OnBrowserEventListener() {
        
        // 기존에 사용하던 isDeepLink 를 아래로 대체
            @Override
            public void onDeepLinkOpened() {
                finish();
            }
        });
    }

    // Optional - BackButton을 눌렀을때 뒤로가기 기능
    @Override
    public void onBackPressed() {
    final BuzzAdWebView webView = fragment.getWebView();
        if (webView != null && webView.canGoBack()) {
            webView.goBack();
        } else {
            super.onBackPressed();
        }
    }
}

public class MyLauncher implements Launcher {

    @Override
    public void launch(@NonNull Context context, @NonNull LaunchInfo launchInfo) {
        launch(context, launchInfo, null);
    }

    @Override
    public void launch(@NonNull final Context context, @NonNull final LaunchInfo launchInfo, @Nullable final LauncherEventListener listener) {
        launch(context, launchInfo, listener, null);
    }

    @Override
    public void launch(@NonNull final Context context, @NonNull final LaunchInfo launchInfo, @Nullable final LauncherEventListener listener, @Nullable List<Class<? extends BuzzAdJavascriptInterface>> javascriptInterfaces) {
                 
        // Custom Browser 실행
        final Intent intent = new Intent(context, CustomBrowserActivity.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        intent.putStringputExtra(CustomBrowserActivity.KEY_URL, launchInfo.getUri().toString()); // URI는 변경 하면 안 됨
        context.startActivity(intent);
    }
}