diff --git a/README.md b/README.md
index fd441ea..b4edaee 100644
--- a/README.md
+++ b/README.md
@@ -93,12 +93,24 @@ modelzoo/
 
 Clone it with:
 ```bash
-git clone git@github.com:Amlogic-NN/amlnn-toolkit.git ../amlnn-toolkit
+git clone https://github.com/Amlogic-NN/amlnn-toolkit.git ../amlnn-toolkit
 ```
 
 
 
-​     Each **example** directory contains a **build-android.sh** and build-linux.sh **script**. For compilation steps, refer to **Chapter 4** of the **README.md** file in the corresponding example directory.
+​     Each **example** directory contains a **build-android.sh** and **build-linux.sh** script. For compilation steps, refer to **Chapter 4** of the **README.md** file in the corresponding example directory.
+
+To build **all examples at once**, use the top-level batch script:
+
+```bash
+cd examples
+./build-android-all.sh          # auto-detects amlnn-toolkit (Priority 3)
+# or explicitly:
+AMLNN_HOME=/path/to/amlnn-toolkit ./build-android-all.sh
+```
+
+The script automatically cleans the previous build, resolves the AMLNN SDK via the priority rules above, and prints a build summary at the end.
+
 
 
 
diff --git a/examples/build-android-all.sh b/examples/build-android-all.sh
index 95d24d9..f273101 100755
--- a/examples/build-android-all.sh
+++ b/examples/build-android-all.sh
@@ -72,7 +72,7 @@ else
     echo "    ./build-android-all.sh"
     echo ""
     echo "  Option B – clone amlnn-toolkit as a sibling directory:"
-    echo "    git clone git@github.com:Amlogic-NN/amlnn-toolkit.git ../../../amlnn-toolkit"
+    echo "    git clone https://github.com/Amlogic-NN/amlnn-toolkit.git ../../amlnn-toolkit"
     echo "    ./build-android-all.sh"
     echo ""
     exit 1
diff --git a/examples/clean-android-all.sh b/examples/clean-android-all.sh
new file mode 100755
index 0000000..fad1ed5
--- /dev/null
+++ b/examples/clean-android-all.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+#
+# Copyright (C) 2024–2025 Amlogic, Inc. All rights reserved.
+#
+# 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
+#
+#     http://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.
+#
+
+SCRIPT_DIR=$(cd "$(dirname $0)" && pwd)
+
+echo "Cleaning all Android build directories..."
+
+find "${SCRIPT_DIR}" -type d -name "build" | while read dir; do
+    echo "  rm -rf ${dir}"
+    rm -rf "${dir}"
+done
+
+echo "Done."
diff --git a/examples/clip/README.md b/examples/clip/README.md
index 7b8a6e5..f8f5ebd 100644
--- a/examples/clip/README.md
+++ b/examples/clip/README.md
@@ -18,20 +18,6 @@ TO DO
 
 #### 1. Compile
 
-#### AMLNN SDK Setup
-
-Resolve the AMLNN nnsdk dependency using one of the following methods:
-
-- **Priority 1 – Environment variable (recommended)**
-  ```bash
-  export AMLNN_HOME=/path/to/amlnn-toolkit
-  ```
-- **Priority 3 – Sibling directory fallback** *(automatic)*
-  Place `amlnn-toolkit` as a sibling to `amlnn-model-playground`:
-  ```bash
-  git clone git@github.com:Amlogic-NN/amlnn-toolkit.git ../amlnn-toolkit
-  ```
-
 **Prerequisites:**
 - Android NDK (r25e recommended)
 - `ANDROID_NDK_PATH` environment variable set
@@ -40,7 +26,7 @@ Resolve the AMLNN nnsdk dependency using one of the following methods:
 ```bash
 # Build for arm64-v8a
 cd examples/clip/cpp
-./build-android.sh -a arm64-v8a
+AMLNN_HOME=/path/to/amlnn-toolkit ./build-android.sh -a arm64-v8a
 ```
 
 The executable will be generated at `build/android_arm64-v8a/clip_demo`.
diff --git a/examples/mobilenet/README.md b/examples/mobilenet/README.md
index b4a9324..e65a0b4 100644
--- a/examples/mobilenet/README.md
+++ b/examples/mobilenet/README.md
@@ -16,20 +16,6 @@ for deployment on Amlogic NPU platforms.
 
 #### 1. Compile
 
-#### AMLNN SDK Setup
-
-Resolve the AMLNN nnsdk dependency using one of the following methods:
-
-- **Priority 1 – Environment variable (recommended)**
-  ```bash
-  export AMLNN_HOME=/path/to/amlnn-toolkit
-  ```
-- **Priority 3 – Sibling directory fallback** *(automatic)*
-  Place `amlnn-toolkit` as a sibling to `amlnn-model-playground`:
-  ```bash
-  git clone git@github.com:Amlogic-NN/amlnn-toolkit.git ../amlnn-toolkit
-  ```
-
 **Prerequisites:**
 - Android NDK (r25e recommended)
 - `ANDROID_NDK_PATH` environment variable set
@@ -38,7 +24,7 @@ Resolve the AMLNN nnsdk dependency using one of the following methods:
 ```bash
 # Build for arm64-v8a
 cd examples/mobilenet/cpp
-./build-android.sh -a arm64-v8a
+AMLNN_HOME=/path/to/amlnn-toolkit ./build-android.sh -a arm64-v8a
 ```
 
 The executable will be generated at `build/android/mobilenet_v2_demo` (Note: executable name may vary, verify in build folder).
diff --git a/examples/ppocr-det/README.md b/examples/ppocr-det/README.md
index a1f1540..fbeb79a 100644
--- a/examples/ppocr-det/README.md
+++ b/examples/ppocr-det/README.md
@@ -6,20 +6,6 @@
 
 #### 1. Compile
 
-#### AMLNN SDK Setup
-
-Resolve the AMLNN nnsdk dependency using one of the following methods:
-
-- **Priority 1 – Environment variable (recommended)**
-  ```bash
-  export AMLNN_HOME=/path/to/amlnn-toolkit
-  ```
-- **Priority 3 – Sibling directory fallback** *(automatic)*
-  Place `amlnn-toolkit` as a sibling to `amlnn-model-playground`:
-  ```bash
-  git clone git@github.com:Amlogic-NN/amlnn-toolkit.git ../amlnn-toolkit
-  ```
-
 **Prerequisites:**
 - Android NDK r25c
 - `ANDROID_NDK_PATH` environment variable set
@@ -28,7 +14,7 @@ Resolve the AMLNN nnsdk dependency using one of the following methods:
 ```bash
 # Build for arm64-v8a
 cd examples/ppocr-det/cpp
-./build-android.sh -a arm64-v8a
+AMLNN_HOME=/path/to/amlnn-toolkit ./build-android.sh -a arm64-v8a
 ```
 
 The executable will be generated in `build/android/`.
diff --git a/examples/resnet/README.md b/examples/resnet/README.md
index f24f6d7..defa581 100755
--- a/examples/resnet/README.md
+++ b/examples/resnet/README.md
@@ -61,20 +61,6 @@ example
 
 #### 1. Compile
 
-#### AMLNN SDK Setup
-
-Resolve the AMLNN nnsdk dependency using one of the following methods:
-
-- **Priority 1 – Environment variable (recommended)**
-  ```bash
-  export AMLNN_HOME=/path/to/amlnn-toolkit
-  ```
-- **Priority 3 – Sibling directory fallback** *(automatic)*
-  Place `amlnn-toolkit` as a sibling to `amlnn-model-playground`:
-  ```bash
-  git clone git@github.com:Amlogic-NN/amlnn-toolkit.git ../amlnn-toolkit
-  ```
-
 **Prerequisites:**
 - Android NDK (r25e recommended)
 - `ANDROID_NDK_PATH` environment variable set
@@ -83,7 +69,7 @@ Resolve the AMLNN nnsdk dependency using one of the following methods:
 ```bash
 # Build for arm64-v8a
 cd examples/resnet/cpp
-./build-android.sh -a arm64-v8a
+AMLNN_HOME=/path/to/amlnn-toolkit ./build-android.sh -a arm64-v8a
 ```
 
 The executable will be generated at `build/android/resnet_demo` (Note: executable name may vary, verify in build folder).
diff --git a/examples/retinaface/README.md b/examples/retinaface/README.md
index 7a47df0..1f732b4 100755
--- a/examples/retinaface/README.md
+++ b/examples/retinaface/README.md
@@ -58,20 +58,6 @@ example
 
 #### 1. Compile
 
-#### AMLNN SDK Setup
-
-Resolve the AMLNN nnsdk dependency using one of the following methods:
-
-- **Priority 1 – Environment variable (recommended)**
-  ```bash
-  export AMLNN_HOME=/path/to/amlnn-toolkit
-  ```
-- **Priority 3 – Sibling directory fallback** *(automatic)*
-  Place `amlnn-toolkit` as a sibling to `amlnn-model-playground`:
-  ```bash
-  git clone git@github.com:Amlogic-NN/amlnn-toolkit.git ../amlnn-toolkit
-  ```
-
 **Prerequisites:**
 - Android NDK (r25e recommended)
 - `ANDROID_NDK_PATH` environment variable set
@@ -80,7 +66,7 @@ Resolve the AMLNN nnsdk dependency using one of the following methods:
 ```bash
 # Build for arm64-v8a
 cd examples/retinaface/cpp
-./build-android.sh -a arm64-v8a
+AMLNN_HOME=/path/to/amlnn-toolkit ./build-android.sh -a arm64-v8a
 ```
 
 The executable will be generated at `build/android/retinaface_demo` (Note: executable name may vary, verify in build folder).
diff --git a/examples/whisper/README.md b/examples/whisper/README.md
index 91103b1..cc96ec1 100644
--- a/examples/whisper/README.md
+++ b/examples/whisper/README.md
@@ -6,20 +6,6 @@
 
 #### 1. Compile
 
-#### AMLNN SDK Setup
-
-Resolve the AMLNN nnsdk dependency using one of the following methods:
-
-- **Priority 1 – Environment variable (recommended)**
-  ```bash
-  export AMLNN_HOME=/path/to/amlnn-toolkit
-  ```
-- **Priority 3 – Sibling directory fallback** *(automatic)*
-  Place `amlnn-toolkit` as a sibling to `amlnn-model-playground`:
-  ```bash
-  git clone git@github.com:Amlogic-NN/amlnn-toolkit.git ../amlnn-toolkit
-  ```
-
 **Prerequisites:**
 - Android NDK r25c
 - `ANDROID_NDK_PATH` environment variable set
@@ -28,7 +14,7 @@ Resolve the AMLNN nnsdk dependency using one of the following methods:
 ```bash
 # Build for arm64-v8a
 cd examples/whisper/cpp
-./build-android.sh -a arm64-v8a
+AMLNN_HOME=/path/to/amlnn-toolkit ./build-android.sh -a arm64-v8a
 ```
 
 The executable will be generated in `build/android/`.
diff --git a/examples/yoloe/README.md b/examples/yoloe/README.md
index 2a7d192..b33f6d8 100644
--- a/examples/yoloe/README.md
+++ b/examples/yoloe/README.md
@@ -6,20 +6,6 @@
 
 #### 1. Compile
 
-#### AMLNN SDK Setup
-
-Resolve the AMLNN nnsdk dependency using one of the following methods:
-
-- **Priority 1 – Environment variable (recommended)**
-  ```bash
-  export AMLNN_HOME=/path/to/amlnn-toolkit
-  ```
-- **Priority 3 – Sibling directory fallback** *(automatic)*
-  Place `amlnn-toolkit` as a sibling to `amlnn-model-playground`:
-  ```bash
-  git clone git@github.com:Amlogic-NN/amlnn-toolkit.git ../amlnn-toolkit
-  ```
-
 **Prerequisites:**
 - Android NDK r25c
 - `ANDROID_NDK_PATH` environment variable set
@@ -28,7 +14,7 @@ Resolve the AMLNN nnsdk dependency using one of the following methods:
 ```bash
 # Build for arm64-v8a
 cd examples/yoloe/cpp
-./build-android.sh -a arm64-v8a
+AMLNN_HOME=/path/to/amlnn-toolkit ./build-android.sh -a arm64-v8a
 ```
 
 The executable will be generated in `build/android/`.
diff --git a/examples/yolov11/README.md b/examples/yolov11/README.md
index 79fff22..2558b9e 100755
--- a/examples/yolov11/README.md
+++ b/examples/yolov11/README.md
@@ -70,20 +70,6 @@ example
 
 #### 1. Compile
 
-#### AMLNN SDK Setup
-
-Resolve the AMLNN nnsdk dependency using one of the following methods:
-
-- **Priority 1 – Environment variable (recommended)**
-  ```bash
-  export AMLNN_HOME=/path/to/amlnn-toolkit
-  ```
-- **Priority 3 – Sibling directory fallback** *(automatic)*
-  Place `amlnn-toolkit` as a sibling to `amlnn-model-playground`:
-  ```bash
-  git clone git@github.com:Amlogic-NN/amlnn-toolkit.git ../amlnn-toolkit
-  ```
-
 **Prerequisites:**
 - Android NDK (r25e recommended)
 - `ANDROID_NDK_PATH` environment variable set
@@ -92,7 +78,7 @@ Resolve the AMLNN nnsdk dependency using one of the following methods:
 ```bash
 # Build for arm64-v8a
 cd examples/yolov11/cpp
-./build-android.sh -a arm64-v8a
+AMLNN_HOME=/path/to/amlnn-toolkit ./build-android.sh -a arm64-v8a
 ```
 
 The executable will be generated at `build/android/yolo11_demo` (Note: executable name may vary, verify in build folder).
diff --git a/examples/yolov8/README.md b/examples/yolov8/README.md
index 43d1c97..c4f0d08 100644
--- a/examples/yolov8/README.md
+++ b/examples/yolov8/README.md
@@ -70,20 +70,6 @@ example
 
 #### 1. Compile
 
-#### AMLNN SDK Setup
-
-Resolve the AMLNN nnsdk dependency using one of the following methods:
-
-- **Priority 1 – Environment variable (recommended)**
-  ```bash
-  export AMLNN_HOME=/path/to/amlnn-toolkit
-  ```
-- **Priority 3 – Sibling directory fallback** *(automatic)*
-  Place `amlnn-toolkit` as a sibling to `amlnn-model-playground`:
-  ```bash
-  git clone git@github.com:Amlogic-NN/amlnn-toolkit.git ../amlnn-toolkit
-  ```
-
 **Prerequisites:**
 - Android NDK (r25e recommended)
 - `ANDROID_NDK_PATH` environment variable set
@@ -92,7 +78,7 @@ Resolve the AMLNN nnsdk dependency using one of the following methods:
 ```bash
 # Build for arm64-v8a
 cd examples/yolov8/cpp
-./build-android.sh -a arm64-v8a
+AMLNN_HOME=/path/to/amlnn-toolkit ./build-android.sh -a arm64-v8a
 ```
 
 The executable will be generated at `build/android/yolov8_demo` (Note: executable name may vary, verify in build folder).
diff --git a/examples/yoloworld/README.md b/examples/yoloworld/README.md
index 0c6c126..8293378 100644
--- a/examples/yoloworld/README.md
+++ b/examples/yoloworld/README.md
@@ -4,20 +4,6 @@
 
 #### 1. Compile
 
-#### AMLNN SDK Setup
-
-Resolve the AMLNN nnsdk dependency using one of the following methods:
-
-- **Priority 1 – Environment variable (recommended)**
-  ```bash
-  export AMLNN_HOME=/path/to/amlnn-toolkit
-  ```
-- **Priority 3 – Sibling directory fallback** *(automatic)*
-  Place `amlnn-toolkit` as a sibling to `amlnn-model-playground`:
-  ```bash
-  git clone git@github.com:Amlogic-NN/amlnn-toolkit.git ../amlnn-toolkit
-  ```
-
 **Prerequisites:**
 - Android NDK (r25e recommended)
 - `ANDROID_NDK_PATH` environment variable set
@@ -26,7 +12,7 @@ Resolve the AMLNN nnsdk dependency using one of the following methods:
 ```bash
 # Build for arm64-v8a
 cd examples/yoloworld/cpp
-./build-android.sh -a arm64-v8a
+AMLNN_HOME=/path/to/amlnn-toolkit ./build-android.sh -a arm64-v8a
 ```
 
 The executable will be generated at `build/android/yolo_world_demo` (Note: executable name may vary, verify in build folder).