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Android: Use java code to show or hide the keyboard
instead of coding it all in JNI This uses build.rs to compile the java code into bytecode that is then embedded in the binary and loaded at runtime
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| use std::path::PathBuf; | ||
| // Copyright © SixtyFPS GmbH <info@slint.dev> | ||
| // SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-1.1 OR LicenseRef-Slint-commercial | ||
|
|
||
| use std::process::Command; | ||
| use std::{env, fs}; | ||
|
|
||
| fn main() { | ||
| if !env::var("TARGET").unwrap().contains("android") { | ||
| return; | ||
| } | ||
|
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| let out_dir = env::var("OUT_DIR").unwrap(); | ||
|
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| let slint_path = "dev/slint/android-activity"; | ||
| let java_class = "SlintAndroidJavaHelper"; | ||
|
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| let out_class = format!("{out_dir}/java/{slint_path}"); | ||
|
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| let android_home = | ||
| PathBuf::from(env_var("ANDROID_HOME").or_else(|_| env_var("ANDROID_SDK_ROOT")).expect( | ||
| "Please set the ANDROID_HOME environment variable to the path of the Android SDK", | ||
| )); | ||
|
|
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| let classpath = find_latest_version(android_home.join("platforms"), "android.jar") | ||
| .expect("No Android platforms found"); | ||
|
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| // Try to locate javac | ||
| let javac_path = match env_var("JAVA_HOME") { | ||
| Ok(val) => { | ||
| if cfg!(windows) { | ||
| format!("{}\\bin\\javac.exe", val) | ||
| } else { | ||
| format!("{}/bin/javac", val) | ||
| } | ||
| } | ||
| Err(_) => String::from("javac"), | ||
| }; | ||
|
|
||
| // Compile the Java file into a .class file | ||
| let o = Command::new(&javac_path) | ||
| .arg(format!("java/{java_class}.java")) | ||
| .arg("-d") | ||
| .arg(&out_class) | ||
| .arg("-classpath").arg(&classpath) | ||
| .arg("--release") | ||
| .arg("8") | ||
| .output() | ||
| .unwrap_or_else(|err| { | ||
| if err.kind() == std::io::ErrorKind::NotFound { | ||
| panic!("Could not locate the java compiler. Please ensure that the JAVA_HOME environment variable is set correctly.") | ||
| } else { | ||
| panic!("Could not run {javac_path}: {err}") | ||
| } | ||
| }); | ||
|
|
||
| if !o.status.success() { | ||
| panic!("Java compilation failed: {}", String::from_utf8_lossy(&o.stderr)); | ||
| } | ||
|
|
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| // Convert the .class file into a .dex file | ||
| let d8_path = find_latest_version( | ||
| android_home.join("build-tools"), | ||
| if cfg!(windows) { "d8.exe" } else { "d8" }, | ||
| ) | ||
| .expect("d8 tool not found"); | ||
| let o = Command::new(&d8_path) | ||
| .args(&["--classpath", &out_class]) | ||
| .arg(format!("{out_class}/{java_class}.class")) | ||
| .arg("--output") | ||
| .arg(&out_dir) | ||
| .output() | ||
| .unwrap_or_else(|err| panic!("Error running {d8_path:?}: {err}")); | ||
|
|
||
| if !o.status.success() { | ||
| panic!("Dex conversion failed: {}", String::from_utf8_lossy(&o.stderr)); | ||
| } | ||
|
|
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| println!("cargo:rerun-if-changed=java/{java_class}.java"); | ||
| } | ||
|
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| fn env_var(var: &str) -> Result<String, env::VarError> { | ||
| println!("cargo:rerun-if-env-changed={}", var); | ||
| env::var(var) | ||
| } | ||
|
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||
| fn find_latest_version(base: PathBuf, arg: &str) -> Option<PathBuf> { | ||
| fs::read_dir(base) | ||
| .ok()? | ||
| .filter_map(|entry| Some(entry.ok()?.path().join(arg))) | ||
| .filter(|path| path.exists()) | ||
| .max() | ||
| } |
24 changes: 24 additions & 0 deletions
24
internal/backends/android-activity/java/SlintAndroidJavaHelper.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,24 @@ | ||
| // Copyright © SixtyFPS GmbH <info@slint.dev> | ||
| // SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-1.1 OR LicenseRef-Slint-commercial | ||
|
|
||
| import android.view.View; | ||
| import android.content.Context; | ||
| import android.view.inputmethod.InputMethodManager; | ||
| import android.app.Activity; | ||
|
|
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| public class SlintAndroidJavaHelper { | ||
| Activity mActivity; | ||
|
|
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| public SlintAndroidJavaHelper(Activity activity) { | ||
| this.mActivity = activity; | ||
| } | ||
| public void show_keyboard() { | ||
| InputMethodManager imm = (InputMethodManager)mActivity.getSystemService(Context.INPUT_METHOD_SERVICE); | ||
| imm.showSoftInput(mActivity.getWindow().getDecorView(), 0); | ||
| } | ||
| public void hide_keyboard() { | ||
| InputMethodManager imm = (InputMethodManager)mActivity.getSystemService(Context.INPUT_METHOD_SERVICE); | ||
| imm.hideSoftInputFromWindow(mActivity.getWindow().getDecorView().getWindowToken(), 0); | ||
| } | ||
|
|
||
| } |
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