// List all available contexts
Set<String> contexts = driver.getContextHandles();
for (String ctx : contexts) {
    System.out.println(ctx); // NATIVE_APP, WEBVIEW_com.example.app
}

// Switch to WebView
driver.context("WEBVIEW_com.example.app");

// Now use regular Selenium-style locators
driver.findElement(By.id("web-button")).click();

// Switch back to native
driver.context("NATIVE_APP");