Update README.md

examples/README.md

@@ -70,6 +70,7 @@ git checkout v0.4.0
     - [Build & Run](#build--run)
     - [About `libc++_shared.so`](#about-libc_sharedso)
     - [Old phones](#old-phones)
+    - [About `cargo-apk`](#about-cargo-apk)
   - [iOS](#ios)
     - [Setup](#setup-1)
     - [Build & Run](#build--run-1)
@@ -489,6 +490,8 @@ The Android SDK must be installed, and the environment variable `ANDROID_SDK_ROO
 
 When using `NDK (Side by side)`, the environment variable `ANDROID_NDK_ROOT` must also be set to one of the NDKs in `sdk\ndk\[NDK number]`.
 
+Alternatively, you can install Android Studio.
+
 ### Build & Run
 
 To build an android app, you need to compile it to `so` first with `cargo-ndk`:
@@ -513,6 +516,14 @@ cargo ndk -t arm64-v8a -o android_example/app/src/main/jniLibs build
 
 Please reference `cargo-ndk` [README](https://crates.io/crates/cargo-ndk) for other options.
 
+Then you can build it with `gradlew`:
+
+```sh
+./gradlew build
+```
+
+Or build it with Android Studio.
+
 After compiling and linking you can build and test it in your android project.
 
 #### About `libc++_shared.so`
@@ -553,6 +564,10 @@ bevy = { version = "0.14", default-features = false, features = ["android-native
 
 Then build it as the [Build & Run](#build--run) section stated above.
 
+#### About `cargo-apk`
+
+You can also build apk with `cargo-apk`, a simpler tool that compile rust code to apk directly, but this tool is deprecated, and it doesn't support `GameActivity`. If you want to use this, there is a [folder](./mobile/android_basic) inside mobile example with a instruction to use it.
+
 Example | File | Description
 --- | --- | ---
 `android` | [`mobile/src/lib.rs`](./mobile/src/lib.rs) | A 3d Scene with a button and playing sound