ehlxr/jni_rs
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update at 2022-02-25 11:37:04 by ehlxr

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This commit is contained in:
ehlxr 2022-02-25 11:37:04 +08:00
parent a5a597a032
commit cef17e09ec
1 changed files with 27 additions and 6 deletions
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33
mylib/src/lib.rs
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@ -9,23 +9,32 @@ pub extern "system" fn Java_me_ehlxr_HelloWorld_getFiled(
_class: JClass, _class: JClass,
input: JObject, input: JObject,
) -> jstring { ) -> jstring {
let map = env let jmap = env
.get_field(input, "map", "Ljava/util/Map;") .get_map(
.unwrap() env.get_field(input, "map", "Ljava/util/Map;")
.l() .unwrap()
.l()
.unwrap(),
)
.unwrap(); .unwrap();
let jmap = env.get_map(map).unwrap();
let v1 = jmap let v1 = jmap
.get(JObject::from(env.new_string("k1").unwrap())) .get(JObject::from(env.new_string("k1").unwrap()))
.unwrap() .unwrap()
.unwrap(); .unwrap();
println!("get map key k1, value: {}", long_value(env, v1)); println!("get map key k1, value: {}", long_value(env, v1));
if let Ok(_) = jmap.put(
JObject::from(env.new_string("k9").unwrap()),
long_to_jobj(env, 9 as i64),
) {
println!("put key ok");
};
jmap.iter().unwrap().into_iter().for_each(|jmap_iter| { jmap.iter().unwrap().into_iter().for_each(|jmap_iter| {
let key: JString = jmap_iter.0.into(); let key: JString = jmap_iter.0.into();
let value = jmap_iter.1; let value = jmap_iter.1;
println!( println!(
"get map key: {}, value: {}", "iter map key: {}, value: {}",
String::from(env.get_string(key).unwrap()), String::from(env.get_string(key).unwrap()),
long_value(env, value) long_value(env, value)
); );
@ -226,6 +235,18 @@ fn long_value(env: JNIEnv, jobj: JObject) -> i64 {
.unwrap() .unwrap()
} }
fn long_to_jobj<'a>(env: JNIEnv<'a>, lv: i64) -> JObject<'a> {
env.call_static_method(
"Ljava/lang/Long;",
"valueOf",
"(J)Ljava/lang/Long;",
&[JValue::from(lv)],
)
.unwrap()
.l()
.unwrap()
}
#[cfg(test)] #[cfg(test)]
mod tests { mod tests {
#[test] #[test]