diff --git a/sherpa-onnx/csrc/offline-speaker-diarization-impl.cc b/sherpa-onnx/csrc/offline-speaker-diarization-impl.cc
index e41a7767a..15c3a2eb4 100644
--- a/sherpa-onnx/csrc/offline-speaker-diarization-impl.cc
+++ b/sherpa-onnx/csrc/offline-speaker-diarization-impl.cc
@@ -23,4 +23,18 @@ OfflineSpeakerDiarizationImpl::Create(
   return nullptr;
 }
 
+#if __ANDROID_API__ >= 9
+std::unique_ptr<OfflineSpeakerDiarizationImpl>
+OfflineSpeakerDiarizationImpl::Create(
+    AAssetManager *mgr, const OfflineSpeakerDiarizationConfig &config) {
+  if (!config.segmentation.pyannote.model.empty()) {
+    return std::make_unique<OfflineSpeakerDiarizationPyannoteImpl>(mgr, config);
+  }
+
+  SHERPA_ONNX_LOGE("Please specify a speaker segmentation model.");
+
+  return nullptr;
+}
+#endif
+
 }  // namespace sherpa_onnx
diff --git a/sherpa-onnx/csrc/offline-speaker-diarization-impl.h b/sherpa-onnx/csrc/offline-speaker-diarization-impl.h
index 3aed9d72f..41f0e1e2f 100644
--- a/sherpa-onnx/csrc/offline-speaker-diarization-impl.h
+++ b/sherpa-onnx/csrc/offline-speaker-diarization-impl.h
@@ -8,6 +8,11 @@
 #include <functional>
 #include <memory>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/offline-speaker-diarization.h"
 namespace sherpa_onnx {
 
@@ -16,6 +21,11 @@ class OfflineSpeakerDiarizationImpl {
   static std::unique_ptr<OfflineSpeakerDiarizationImpl> Create(
       const OfflineSpeakerDiarizationConfig &config);
 
+#if __ANDROID_API__ >= 9
+  static std::unique_ptr<OfflineSpeakerDiarizationImpl> Create(
+      AAssetManager *mgr, const OfflineSpeakerDiarizationConfig &config);
+#endif
+
   virtual ~OfflineSpeakerDiarizationImpl() = default;
 
   virtual int32_t SampleRate() const = 0;
diff --git a/sherpa-onnx/csrc/offline-speaker-diarization-pyannote-impl.h b/sherpa-onnx/csrc/offline-speaker-diarization-pyannote-impl.h
index 0c70f0bc6..aaedc3be0 100644
--- a/sherpa-onnx/csrc/offline-speaker-diarization-pyannote-impl.h
+++ b/sherpa-onnx/csrc/offline-speaker-diarization-pyannote-impl.h
@@ -10,6 +10,11 @@
 #include <utility>
 #include <vector>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "Eigen/Dense"
 #include "sherpa-onnx/csrc/fast-clustering.h"
 #include "sherpa-onnx/csrc/math.h"
@@ -65,6 +70,17 @@ class OfflineSpeakerDiarizationPyannoteImpl
     Init();
   }
 
+#if __ANDROID_API__ >= 9
+  OfflineSpeakerDiarizationPyannoteImpl(
+      AAssetManager *mgr, const OfflineSpeakerDiarizationConfig &config)
+      : config_(config),
+        segmentation_model_(mgr, config_.segmentation),
+        embedding_extractor_(mgr, config_.embedding),
+        clustering_(std::make_unique<FastClustering>(config_.clustering)) {
+    Init();
+  }
+#endif
+
   int32_t SampleRate() const override {
     const auto &meta_data = segmentation_model_.GetModelMetaData();
 
diff --git a/sherpa-onnx/csrc/offline-speaker-diarization.cc b/sherpa-onnx/csrc/offline-speaker-diarization.cc
index 00733bfb2..f34ea4e0e 100644
--- a/sherpa-onnx/csrc/offline-speaker-diarization.cc
+++ b/sherpa-onnx/csrc/offline-speaker-diarization.cc
@@ -73,6 +73,12 @@ OfflineSpeakerDiarization::OfflineSpeakerDiarization(
     const OfflineSpeakerDiarizationConfig &config)
     : impl_(OfflineSpeakerDiarizationImpl::Create(config)) {}
 
+#if __ANDROID_API__ >= 9
+OfflineSpeakerDiarization::OfflineSpeakerDiarization(
+    AAssetManager *mgr, const OfflineSpeakerDiarizationConfig &config)
+    : impl_(OfflineSpeakerDiarizationImpl::Create(mgr, config)) {}
+#endif
+
 OfflineSpeakerDiarization::~OfflineSpeakerDiarization() = default;
 
 int32_t OfflineSpeakerDiarization::SampleRate() const {
diff --git a/sherpa-onnx/csrc/offline-speaker-diarization.h b/sherpa-onnx/csrc/offline-speaker-diarization.h
index 376e5f975..4a517fbb2 100644
--- a/sherpa-onnx/csrc/offline-speaker-diarization.h
+++ b/sherpa-onnx/csrc/offline-speaker-diarization.h
@@ -9,6 +9,11 @@
 #include <memory>
 #include <string>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "sherpa-onnx/csrc/fast-clustering-config.h"
 #include "sherpa-onnx/csrc/offline-speaker-diarization-result.h"
 #include "sherpa-onnx/csrc/offline-speaker-segmentation-model-config.h"
@@ -57,6 +62,11 @@ class OfflineSpeakerDiarization {
   explicit OfflineSpeakerDiarization(
       const OfflineSpeakerDiarizationConfig &config);
 
+#if __ANDROID_API__ >= 9
+  OfflineSpeakerDiarization(AAssetManager *mgr,
+                            const OfflineSpeakerDiarizationConfig &config);
+#endif
+
   ~OfflineSpeakerDiarization();
 
   // Expected sample rate of the input audio samples
diff --git a/sherpa-onnx/csrc/offline-speaker-segmentation-pyannote-model.cc b/sherpa-onnx/csrc/offline-speaker-segmentation-pyannote-model.cc
index 3f3323698..e3768dcf4 100644
--- a/sherpa-onnx/csrc/offline-speaker-segmentation-pyannote-model.cc
+++ b/sherpa-onnx/csrc/offline-speaker-segmentation-pyannote-model.cc
@@ -24,6 +24,17 @@ class OfflineSpeakerSegmentationPyannoteModel::Impl {
     Init(buf.data(), buf.size());
   }
 
+#if __ANDROID_API__ >= 9
+  Impl(AAssetManager *mgr, const OfflineSpeakerSegmentationModelConfig &config)
+      : config_(config),
+        env_(ORT_LOGGING_LEVEL_ERROR),
+        sess_opts_(GetSessionOptions(config)),
+        allocator_{} {
+    auto buf = ReadFile(mgr, config_.pyannote.model);
+    Init(buf.data(), buf.size());
+  }
+#endif
+
   const OfflineSpeakerSegmentationPyannoteModelMetaData &GetModelMetaData()
       const {
     return meta_data_;
@@ -92,6 +103,13 @@ OfflineSpeakerSegmentationPyannoteModel::
         const OfflineSpeakerSegmentationModelConfig &config)
     : impl_(std::make_unique<Impl>(config)) {}
 
+#if __ANDROID_API__ >= 9
+OfflineSpeakerSegmentationPyannoteModel::
+    OfflineSpeakerSegmentationPyannoteModel(
+        AAssetManager *mgr, const OfflineSpeakerSegmentationModelConfig &config)
+    : impl_(std::make_unique<Impl>(mgr, config)) {}
+#endif
+
 OfflineSpeakerSegmentationPyannoteModel::
     ~OfflineSpeakerSegmentationPyannoteModel() = default;
 
diff --git a/sherpa-onnx/csrc/offline-speaker-segmentation-pyannote-model.h b/sherpa-onnx/csrc/offline-speaker-segmentation-pyannote-model.h
index b504c373f..6b835763b 100644
--- a/sherpa-onnx/csrc/offline-speaker-segmentation-pyannote-model.h
+++ b/sherpa-onnx/csrc/offline-speaker-segmentation-pyannote-model.h
@@ -6,6 +6,11 @@
 
 #include <memory>
 
+#if __ANDROID_API__ >= 9
+#include "android/asset_manager.h"
+#include "android/asset_manager_jni.h"
+#endif
+
 #include "onnxruntime_cxx_api.h"  // NOLINT
 #include "sherpa-onnx/csrc/offline-speaker-segmentation-model-config.h"
 #include "sherpa-onnx/csrc/offline-speaker-segmentation-pyannote-model-meta-data.h"
@@ -17,6 +22,11 @@ class OfflineSpeakerSegmentationPyannoteModel {
   explicit OfflineSpeakerSegmentationPyannoteModel(
       const OfflineSpeakerSegmentationModelConfig &config);
 
+#if __ANDROID_API__ >= 9
+  OfflineSpeakerSegmentationPyannoteModel(
+      AAssetManager *mgr, const OfflineSpeakerSegmentationModelConfig &config);
+#endif
+
   ~OfflineSpeakerSegmentationPyannoteModel();
 
   const OfflineSpeakerSegmentationPyannoteModelMetaData &GetModelMetaData()
diff --git a/sherpa-onnx/csrc/sherpa-onnx-vad-microphone-offline-asr.cc b/sherpa-onnx/csrc/sherpa-onnx-vad-microphone-offline-asr.cc
index c90c29c52..df3e250a5 100644
--- a/sherpa-onnx/csrc/sherpa-onnx-vad-microphone-offline-asr.cc
+++ b/sherpa-onnx/csrc/sherpa-onnx-vad-microphone-offline-asr.cc
@@ -211,7 +211,7 @@ to download models for offline ASR.
     }
 
     while (!vad->Empty()) {
-      auto &segment = vad->Front();
+      const auto &segment = vad->Front();
       auto s = recognizer.CreateStream();
       s->AcceptWaveform(sample_rate, segment.samples.data(),
                         segment.samples.size());
diff --git a/sherpa-onnx/jni/audio-tagging.cc b/sherpa-onnx/jni/audio-tagging.cc
index ff8db0089..7ad6e7d53 100644
--- a/sherpa-onnx/jni/audio-tagging.cc
+++ b/sherpa-onnx/jni/audio-tagging.cc
@@ -70,6 +70,7 @@ JNIEXPORT jlong JNICALL Java_com_k2fsa_sherpa_onnx_AudioTagging_newFromAsset(
   AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
   if (!mgr) {
     SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
+    return 0;
   }
 #endif
 
diff --git a/sherpa-onnx/jni/keyword-spotter.cc b/sherpa-onnx/jni/keyword-spotter.cc
index ca0c229c2..4ac80a294 100644
--- a/sherpa-onnx/jni/keyword-spotter.cc
+++ b/sherpa-onnx/jni/keyword-spotter.cc
@@ -115,10 +115,12 @@ JNIEXPORT jlong JNICALL Java_com_k2fsa_sherpa_onnx_KeywordSpotter_newFromAsset(
   AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
   if (!mgr) {
     SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
+    return 0;
   }
 #endif
   auto config = sherpa_onnx::GetKwsConfig(env, _config);
   SHERPA_ONNX_LOGE("config:\n%s", config.ToString().c_str());
+
   auto kws = new sherpa_onnx::KeywordSpotter(
 #if __ANDROID_API__ >= 9
       mgr,
diff --git a/sherpa-onnx/jni/offline-punctuation.cc b/sherpa-onnx/jni/offline-punctuation.cc
index 5056a3ac4..efe03cac0 100644
--- a/sherpa-onnx/jni/offline-punctuation.cc
+++ b/sherpa-onnx/jni/offline-punctuation.cc
@@ -53,10 +53,12 @@ Java_com_k2fsa_sherpa_onnx_OfflinePunctuation_newFromAsset(
   AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
   if (!mgr) {
     SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
+    return 0;
   }
 #endif
   auto config = sherpa_onnx::GetOfflinePunctuationConfig(env, _config);
   SHERPA_ONNX_LOGE("config:\n%s", config.ToString().c_str());
+
   auto model = new sherpa_onnx::OfflinePunctuation(
 #if __ANDROID_API__ >= 9
       mgr,
diff --git a/sherpa-onnx/jni/offline-recognizer.cc b/sherpa-onnx/jni/offline-recognizer.cc
index 8c1265bba..5e4b359b6 100644
--- a/sherpa-onnx/jni/offline-recognizer.cc
+++ b/sherpa-onnx/jni/offline-recognizer.cc
@@ -233,10 +233,12 @@ Java_com_k2fsa_sherpa_onnx_OfflineRecognizer_newFromAsset(JNIEnv *env,
   AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
   if (!mgr) {
     SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
+    return 0;
   }
 #endif
   auto config = sherpa_onnx::GetOfflineConfig(env, _config);
   SHERPA_ONNX_LOGE("config:\n%s", config.ToString().c_str());
+
   auto model = new sherpa_onnx::OfflineRecognizer(
 #if __ANDROID_API__ >= 9
       mgr,
diff --git a/sherpa-onnx/jni/offline-speaker-diarization.cc b/sherpa-onnx/jni/offline-speaker-diarization.cc
index e82962c80..ba4e14bc3 100644
--- a/sherpa-onnx/jni/offline-speaker-diarization.cc
+++ b/sherpa-onnx/jni/offline-speaker-diarization.cc
@@ -101,7 +101,24 @@ SHERPA_ONNX_EXTERN_C
 JNIEXPORT jlong JNICALL
 Java_com_k2fsa_sherpa_onnx_OfflineSpeakerDiarization_newFromAsset(
     JNIEnv *env, jobject /*obj*/, jobject asset_manager, jobject _config) {
-  return 0;
+#if __ANDROID_API__ >= 9
+  AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
+  if (!mgr) {
+    SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
+    return 0;
+  }
+#endif
+
+  auto config = sherpa_onnx::GetOfflineSpeakerDiarizationConfig(env, _config);
+  SHERPA_ONNX_LOGE("config:\n%s", config.ToString().c_str());
+
+  auto sd = new sherpa_onnx::OfflineSpeakerDiarization(
+#if __ANDROID_API__ >= 9
+      mgr,
+#endif
+      config);
+
+  return (jlong)sd;
 }
 
 SHERPA_ONNX_EXTERN_C
diff --git a/sherpa-onnx/jni/offline-tts.cc b/sherpa-onnx/jni/offline-tts.cc
index 43a93e0e0..4d67afc27 100644
--- a/sherpa-onnx/jni/offline-tts.cc
+++ b/sherpa-onnx/jni/offline-tts.cc
@@ -105,6 +105,7 @@ JNIEXPORT jlong JNICALL Java_com_k2fsa_sherpa_onnx_OfflineTts_newFromAsset(
   AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
   if (!mgr) {
     SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
+    return 0;
   }
 #endif
   auto config = sherpa_onnx::GetOfflineTtsConfig(env, _config);
diff --git a/sherpa-onnx/jni/online-recognizer.cc b/sherpa-onnx/jni/online-recognizer.cc
index 1793cf73b..dbe205c4e 100644
--- a/sherpa-onnx/jni/online-recognizer.cc
+++ b/sherpa-onnx/jni/online-recognizer.cc
@@ -267,6 +267,7 @@ Java_com_k2fsa_sherpa_onnx_OnlineRecognizer_newFromAsset(JNIEnv *env,
   AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
   if (!mgr) {
     SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
+    return 0;
   }
 #endif
   auto config = sherpa_onnx::GetConfig(env, _config);
diff --git a/sherpa-onnx/jni/speaker-embedding-extractor.cc b/sherpa-onnx/jni/speaker-embedding-extractor.cc
index b1190bffc..33d630ee6 100644
--- a/sherpa-onnx/jni/speaker-embedding-extractor.cc
+++ b/sherpa-onnx/jni/speaker-embedding-extractor.cc
@@ -45,6 +45,7 @@ Java_com_k2fsa_sherpa_onnx_SpeakerEmbeddingExtractor_newFromAsset(
   AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
   if (!mgr) {
     SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
+    return 0;
   }
 #endif
   auto config = sherpa_onnx::GetSpeakerEmbeddingExtractorConfig(env, _config);
diff --git a/sherpa-onnx/jni/spoken-language-identification.cc b/sherpa-onnx/jni/spoken-language-identification.cc
index 278c6adbf..fcb6f228a 100644
--- a/sherpa-onnx/jni/spoken-language-identification.cc
+++ b/sherpa-onnx/jni/spoken-language-identification.cc
@@ -62,6 +62,7 @@ Java_com_k2fsa_sherpa_onnx_SpokenLanguageIdentification_newFromAsset(
   AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
   if (!mgr) {
     SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
+    return 0;
   }
 #endif
 
diff --git a/sherpa-onnx/jni/voice-activity-detector.cc b/sherpa-onnx/jni/voice-activity-detector.cc
index 319edd09b..a30423f70 100644
--- a/sherpa-onnx/jni/voice-activity-detector.cc
+++ b/sherpa-onnx/jni/voice-activity-detector.cc
@@ -71,10 +71,12 @@ JNIEXPORT jlong JNICALL Java_com_k2fsa_sherpa_onnx_Vad_newFromAsset(
   AAssetManager *mgr = AAssetManager_fromJava(env, asset_manager);
   if (!mgr) {
     SHERPA_ONNX_LOGE("Failed to get asset manager: %p", mgr);
+    return 0;
   }
 #endif
   auto config = sherpa_onnx::GetVadModelConfig(env, _config);
   SHERPA_ONNX_LOGE("config:\n%s", config.ToString().c_str());
+
   auto model = new sherpa_onnx::VoiceActivityDetector(
 #if __ANDROID_API__ >= 9
       mgr,