diff --git a/java/advanced/APIDemo/app/src/main/java/com/google/android/gms/snippets/SampleAdapterSnippets.java b/java/advanced/APIDemo/app/src/main/java/com/google/android/gms/snippets/SampleAdapterSnippets.java
new file mode 100644
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--- /dev/null
+++ b/java/advanced/APIDemo/app/src/main/java/com/google/android/gms/snippets/SampleAdapterSnippets.java
@@ -0,0 +1,107 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.google.android.gms.snippets;
+
+import android.content.Context;
+import android.util.Log;
+import com.google.android.gms.ads.mediation.InitializationCompleteCallback;
+import com.google.android.gms.ads.mediation.MediationConfiguration;
+import com.google.android.gms.ads.mediation.VersionInfo;
+import com.google.android.gms.ads.mediation.rtb.RtbAdapter;
+import com.google.android.gms.ads.mediation.rtb.RtbSignalData;
+import com.google.android.gms.ads.mediation.rtb.SignalCallbacks;
+import java.util.List;
+
+/** An example {@link RtbAdapter} implementation for secure signal collection guidance. */
+// [START extend_adapter_class]
+public class SampleAdapterSnippets extends RtbAdapter {
+  // [END extend_adapter_class]
+  private static final String TAG = "SampleAdapterSnippets";
+  private static final String SDK_VERSION_STRING = "1.2.3";
+  private static final String SAMPLE_SIGNAL_PLACEHOLDER = "your_sdk_secure_signal_string";
+
+  // [START initialize_adapter]
+  @Override
+  public void initialize(
+      Context context,
+      InitializationCompleteCallback initializationCompleteCallback,
+      List<MediationConfiguration> configurations) {
+
+    // Add your SDK initialization logic here.
+
+    // Invoke the InitializationCompleteCallback once initialization completes.
+    initializationCompleteCallback.onInitializationSucceeded();
+  }
+
+  // [END initialize_adapter]
+
+  // [START get_adapter_version_info]
+  @Override
+  public VersionInfo getVersionInfo() {
+    // If your SDK implements this adapter in the same binary, return
+    // the same version as your SDK.
+    // return getSDKVersionInfo();
+
+    // If you built a separate binary for this adapter, return
+    // the adapter's version here.
+    int major = 4;
+    int minor = 5;
+    int micro = 6;
+    return new VersionInfo(major, minor, micro);
+  }
+
+  // [END get_adapter_version_info]
+
+  // [START get_sdk_version_info]
+  @Override
+  public VersionInfo getSDKVersionInfo() {
+
+    // Return your SDK's version string here.
+    String versionString = SDK_VERSION_STRING;
+    String[] splits = versionString.split("\\.");
+    if (splits.length >= 3) {
+      try {
+        int major = Integer.parseInt(splits[0]);
+        int minor = Integer.parseInt(splits[1]);
+        int micro = Integer.parseInt(splits[2]);
+        return new VersionInfo(major, minor, micro);
+      } catch (NumberFormatException e) {
+        // Fall through to log warning and return 0.0.0.
+      }
+    }
+
+    Log.w(
+        TAG,
+        String.format(
+            "Unexpected SDK version format: %s. Returning 0.0.0 for SDK version.", versionString));
+    return new VersionInfo(0, 0, 0);
+  }
+
+  // [END get_sdk_version_info]
+
+  // [START collect_signals]
+  @Override
+  public void collectSignals(RtbSignalData rtbSignalData, SignalCallbacks signalCallbacks) {
+
+    // Add your signal collection logic here.
+    String signals = SAMPLE_SIGNAL_PLACEHOLDER;
+
+    // Return the signals as a string to the Google Mobile Ads SDK.
+    signalCallbacks.onSuccess(signals);
+  }
+
+  // [END collect_signals]
+
+}