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docs(android): add a note about how to get the wasm file from a wat text format #272

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hydai merged 1 commit into from
Jun 11, 2025
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docs(android): add a note about how to get the wasm file from a wat text format #272

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8 changes: 6 additions & 2 deletions docs/contribute/source/os/android/apk.md
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Expand Up @@ -66,7 +66,11 @@ class MainActivity : AppCompatActivity() {

### The native library

The Android UI app calls a `NativeLib` Kotlin object to access WasmEdge functions. The `NativeLib` source code is [available here](https://github.com/WasmEdge/WasmEdge/blob/master/utils/android/app/lib/src/main/java/org/wasmedge/native_lib/NativeLib.kt). It uses JNI (Java Native Interface) to load a C shared library called `wasmedge_lib`. It then calls the `nativeWasmFibonacci` function in `wasmedge_lib` to execute the `fibonacci.wasm` WebAssembly bytecode.
The Android UI app calls a `NativeLib` Kotlin object to access WasmEdge functions.
The `NativeLib` source code is [available here](https://github.com/WasmEdge/WasmEdge/blob/master/utils/android/app/lib/src/main/java/org/wasmedge/native_lib/NativeLib.kt). It uses JNI (Java Native Interface) to load a C shared library called `wasmedge_lib`.
It then calls the `nativeWasmFibonacci` function in `wasmedge_lib` to execute the `fibonacci.wasm` WebAssembly bytecode.

Please ensure you have built the `fibonacci.wasm` file from `fibonacci.wat` in the example folder using the WABT tool or any other WebAssembly compiler.

```java
class NativeLib(ctx : Context) {
Expand Down Expand Up @@ -124,7 +128,7 @@ Java_org_wasmedge_native_1lib_NativeLib_nativeWasmFibonacci(

### The WebAssembly function

The `factorial.wat` is a [handwritten WebAssembly script](https://github.com/WasmEdge/WasmEdge/blob/master/examples/wasm/fibonacci.wat) to compute factorial numbers. It is compiled into WebAssembly using the [WABT tool](https://github.com/WebAssembly/wabt).
The `fibonacci.wat` is a [handwritten WebAssembly script](https://github.com/WasmEdge/WasmEdge/blob/master/examples/wasm/fibonacci.wat) to compute fibonacci numbers. It can be compiled into WebAssembly using the [WABT tool](https://github.com/WebAssembly/wabt).

### Build dependencies

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