Update READMEs

examples/na-mainloop/README.md

@@ -1,31 +1,22 @@
-This is a minimal test application similar to `agdk-mainloop` that
-is based on `NativeActivity` instead of `GameActivity`.
-
-It shows how to run a mainloop based on `native_activity::poll_events()` and
-traces the events received without doing any rendering. It also saves and
+This is a minimal test application based on `NativeActivity` that just
+runs a mainloop based on android_activity::poll_events() and traces
+the events received without doing any rendering. It also saves and
 restores some minimal application state.
 
 Since this test doesn't require a custom `Activity` subclass it's
 optionally possible to build this example with `cargo apk`.
 
-The idea here is to test whether we can have a `NativeActivity` based
-glue layer which is API compatible with `game-activity`, which can
-optionally be used for _very_ basic tests/demos that want the convenience
-of not needing to compile any Java code.
-
 # Gradle Build
 ```
-rustup target add aarch64-linux-android
+export ANDROID_NDK_HOME="path/to/ndk"
+export ANDROID_HOME="path/to/sdk"
 
+rustup target add aarch64-linux-android
 cargo install cargo-ndk
 
-export ANDROID_NDK_HOME="path/to/ndk"
 cargo ndk -t arm64-v8a -o app/src/main/jniLibs/  build
-
-export ANDROID_HOME="path/to/sdk"
 ./gradlew build
 ./gradlew installDebug
-adb shell am start -n co.realfit.namainloop/.MainActivity
 ```
 
 # Cargo APK Build
@@ -33,7 +24,9 @@ adb shell am start -n co.realfit.namainloop/.MainActivity
 export ANDROID_NDK_HOME="path/to/ndk"
 export ANDROID_SDK_HOME="path/to/sdk"
 
+rustup target add aarch64-linux-android
 cargo install cargo-apk
+
 cargo apk build
 cargo apk run
-```
+```