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README/packaging tweaks for Android.

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Nolan Darilek 2020-12-30 12:41:28 -06:00
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commit cee5777556
3 changed files with 16 additions and 3 deletions
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15
README.md
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@ -6,7 +6,20 @@ This library provides a high-level Text-To-Speech (TTS) interface supporting var
* Screen readers/SAPI via Tolk (requires `use_tolk` Cargo feature)
* WinRT
* Linux via [Speech Dispatcher](https://freebsoft.org/speechd)
* MacOS
* MacOS/iOS
* AppKit on MacOS 10.13 and below
* AVFoundation on MacOS 10.14 and above, and iOS
* Android
* WebAssembly
## Android Setup
On most platforms, this library is plug-and-play. Because of JNI's complexity, Android setup is a bit more involved. In general, look to the Android example for guidance. Here are some rough steps to get going:
* Set up _Cargo.toml_ as the example does. Be sure to depend on `ndk-glue`.
* Place _Bridge.java_ appropriately in your app. This is needed to support various Android TTS callbacks.
* Create a main activity similar to _MainActivity.kt_. In particular, you need to derive `android.app.NativeActivity`, and you need a `System.loadLibrary(...)` call appropriate for your app. `System.loadLibrary(...)` is needed to trigger `JNI_OnLoad`.
* * Even though you've loaded the library in your main activity, add a metadata tag to your activity in _AndroidManifest.xml_ referencing it. Yes, this is redundant but necessary.
* Set if your various build.gradle scripts to reference the plugins, dependencies, etc. from the example. In particular, you'll want to set up [cargo-ndk-android-gradle](https://github.com/willir/cargo-ndk-android-gradle/) and either [depend on androidx.annotation](https://developer.android.com/reference/androidx/annotation/package-summary) or otherwise configure your app to keep the class _rs.tts.Bridge_.
And I think that should about do it. Good luck!

1
examples/android/cargo.toml
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@ -10,6 +10,5 @@ edition = "2018"
crate-type = ["dylib"]
[dependencies]
jni = "0.18"
ndk-glue = "0.2"
tts = { path = "../.." }

3
src/lib.rs
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@ -5,9 +5,10 @@
* * Screen readers/SAPI via Tolk (requires `use_tolk` Cargo feature)
* * WinRT
* * Linux via [Speech Dispatcher](https://freebsoft.org/speechd)
* * MacOS
* * MacOS/iOS
* * AppKit on MacOS 10.13 and below
* * AVFoundation on MacOS 10.14 and above, and iOS
* * Android
* * WebAssembly
*/