diff --git a/Cargo.toml b/Cargo.toml
index 48115ee..432455f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,5 +7,5 @@ license = "MIT"
 description = "Android intent utilities"
 
 [dependencies]
-jni = "0.20.0"
+jni = "0.21"
 ndk-context = "0.1.1"
diff --git a/example/Cargo.toml b/example/Cargo.toml
index c53e914..ae49d7c 100644
--- a/example/Cargo.toml
+++ b/example/Cargo.toml
@@ -7,9 +7,9 @@ edition = "2021"
 crate_type=["lib", "cdylib"]
 
 [dependencies]
-android-activity = { version = "0.4.0", features = ["native-activity"] }
+android-activity = { version = "0.6.0", features = ["native-activity"] }
 android-intent = { path = "../" }
-jni = { version = "0.20.0" }
+jni = { version = "0.21" }
 ndk-context = "0.1.1"
 
 [package.metadata.android.sdk]
diff --git a/example/src/lib.rs b/example/src/lib.rs
index df4d24a..1dab2ea 100644
--- a/example/src/lib.rs
+++ b/example/src/lib.rs
@@ -3,13 +3,12 @@ use android_intent::{with_current_env, Action, Extra, Intent};
 
 #[no_mangle]
 fn android_main(_android_app: AndroidApp) {
-    with_current_env(|env| {
+    let _ = with_current_env(|env| {
         Intent::new(env, Action::Send)
             .with_type("text/plain")
             .with_extra(Extra::Text, "Hello World!")
             .into_chooser()
             .start_activity()
-            .unwrap()
     });
 
     loop {}
diff --git a/src/intent.rs b/src/intent.rs
index d4f75c5..b88dc61 100644
--- a/src/intent.rs
+++ b/src/intent.rs
@@ -1,49 +1,49 @@
 use jni::{
-    errors::Error,
-    objects::{JObject, JString},
+    objects::{GlobalRef, JObject},
     JNIEnv,
 };
+use crate::{Error, with_current_env};
 
-struct Inner<'env> {
-    env: JNIEnv<'env>,
-    object: JObject<'env>,
+struct Inner {
+    object: GlobalRef,
 }
 
 /// A messaging object you can use to request an action from another android app component.
 #[must_use]
-pub struct Intent<'env> {
-    inner: Result<Inner<'env>, Error>,
+pub struct Intent {
+    inner: Result<Inner, Error>,
 }
 
-impl<'env> Intent<'env> {
-    pub fn from_object(env: JNIEnv<'env>, object: JObject<'env>) -> Self {
-        Self {
-            inner: Ok(Inner { env, object }),
-        }
+impl Intent {
+    pub fn from_object(env: &mut JNIEnv, object: JObject) -> Result<Self, Error> {
+        Ok(Self {
+            inner: Ok(Inner {
+                object: env.new_global_ref(object)?,
+            }),
+        })
     }
 
-    fn from_fn(f: impl FnOnce() -> Result<Inner<'env>, Error>) -> Self {
+    fn from_fn(f: impl FnOnce() -> Result<Inner, Error>) -> Self {
         let inner = f();
         Self { inner }
     }
 
-    pub fn new(env: JNIEnv<'env>, action: impl AsRef<str>) -> Self {
+    pub fn new(env: &mut JNIEnv, action: impl AsRef<str>) -> Self {
         Self::from_fn(|| {
             let intent_class = env.find_class("android/content/Intent")?;
             let action_view =
-                env.get_static_field(intent_class, action.as_ref(), "Ljava/lang/String;")?;
+                env.get_static_field(&intent_class, action.as_ref(), "Ljava/lang/String;")?;
 
             let intent =
-                env.new_object(intent_class, "(Ljava/lang/String;)V", &[action_view.into()])?;
+                env.new_object(intent_class, "(Ljava/lang/String;)V", &[(&action_view).into()])?;
 
             Ok(Inner {
-                env,
-                object: intent,
+                object: env.new_global_ref(intent)?,
             })
         })
     }
 
-    pub fn new_with_uri(env: JNIEnv<'env>, action: impl AsRef<str>, uri: impl AsRef<str>) -> Self {
+    pub fn new_with_uri(env: &mut JNIEnv, action: impl AsRef<str>, uri: impl AsRef<str>) -> Self {
         Self::from_fn(|| {
             let url_string = env.new_string(uri)?;
             let uri_class = env.find_class("android/net/Uri")?;
@@ -51,22 +51,21 @@ impl<'env> Intent<'env> {
                 uri_class,
                 "parse",
                 "(Ljava/lang/String;)Landroid/net/Uri;",
-                &[JString::from(url_string).into()],
+                &[(&url_string).into()],
             )?;
 
             let intent_class = env.find_class("android/content/Intent")?;
             let action_view =
-                env.get_static_field(intent_class, action.as_ref(), "Ljava/lang/String;")?;
+                env.get_static_field(&intent_class, action.as_ref(), "Ljava/lang/String;")?;
 
             let intent = env.new_object(
                 intent_class,
                 "(Ljava/lang/String;Landroid/net/Uri;)V",
-                &[action_view.into(), uri.into()],
+                &[(&action_view).into(), (&uri).into()],
             )?;
 
             Ok(Inner {
-                env,
-                object: intent,
+                object: env.new_global_ref(intent)?,
             })
         })
     }
@@ -76,24 +75,24 @@ impl<'env> Intent<'env> {
     /// use android_intent::{Action, Extra, Intent};
     ///
     /// # android_intent::with_current_env(|env| {
-    /// let intent = Intent::new(env, Action::Send);
-    /// intent.set_class_name("com.excample", "IntentTarget")
-    /// # })
+    ///     let intent = Intent::new(env, Action::Send);
+    ///     Ok(intent.set_class_name("com.excample", "IntentTarget"))
+    /// # });
     /// ```
     pub fn set_class_name(self, package_name: impl AsRef<str>, class_name: impl AsRef<str>) -> Self {
-        self.and_then(|inner| {
-            let package_name = inner.env.new_string(package_name)?;
-            let class_name = inner.env.new_string(class_name)?;
+        self.and_then(|inner| { with_current_env(|env| {
+            let package_name = env.new_string(package_name)?;
+            let class_name = env.new_string(class_name)?;
 
-            inner.env.call_method(
-                inner.object,
+            env.call_method(
+                &inner.object,
                 "setClassName",
                 "(Ljava/lang/String;Ljava/lang/String;)Landroid/content/Intent;",
-                &[package_name.into(), class_name.into()],
+                &[(&package_name).into(), (&class_name).into()],
             )?;
 
             Ok(inner)
-        })
+        })})
     }
 
     /// Add extended data to the intent.
@@ -101,24 +100,24 @@ impl<'env> Intent<'env> {
     /// use android_intent::{Action, Extra, Intent};
     ///
     /// # android_intent::with_current_env(|env| {
-    /// let intent = Intent::new(env, Action::Send);
-    /// intent.push_extra(Extra::Text, "Hello World!")
-    /// # })
+    ///     let intent = Intent::new(env, Action::Send);
+    ///     Ok(intent.with_extra(Extra::Text, "Hello World!"))
+    /// # });
     /// ```
     pub fn with_extra(self, key: impl AsRef<str>, value: impl AsRef<str>) -> Self {
-        self.and_then(|inner| {
-            let key = inner.env.new_string(key)?;
-            let value = inner.env.new_string(value)?;
+        self.and_then(|inner| { with_current_env(|env| {
+            let key = env.new_string(key)?;
+            let value = env.new_string(value)?;
 
-            inner.env.call_method(
-                inner.object,
+            env.call_method(
+                &inner.object,
                 "putExtra",
                 "(Ljava/lang/String;Ljava/lang/String;)Landroid/content/Intent;",
-                &[key.into(), value.into()],
+                &[(&key).into(), (&value).into()],
             )?;
 
             Ok(inner)
-        })
+        })})
     }
 
     /// Builds a new [`Action::Chooser`] Intent that wraps the given target intent.
@@ -126,33 +125,32 @@ impl<'env> Intent<'env> {
     /// use android_intent::{Action, Intent};
     ///
     /// # android_intent::with_current_env(|env| {
-    /// let intent = Intent::new(env, Action::Send).into_chhoser();
-    /// # })
+    ///     Ok(Intent::new(env, Action::Send).into_chooser())
+    /// # });
     /// ```
     pub fn into_chooser(self) -> Self {
         self.into_chooser_with_title(None::<&str>)
     }
 
     pub fn into_chooser_with_title(self, title: Option<impl AsRef<str>>) -> Self {
-        self.and_then(|mut inner| {
+        self.and_then(|mut inner| { with_current_env(|env| {
             let title_value = if let Some(title) = title {
-                let s = inner.env.new_string(title)?;
-                s.into()
+                env.new_string(title)?
             } else {
                 JObject::null().into()
             };
 
-            let intent_class = inner.env.find_class("android/content/Intent")?;
-            let intent = inner.env.call_static_method(
+            let intent_class = env.find_class("android/content/Intent")?;
+            let intent = env.call_static_method(
                 intent_class,
                 "createChooser",
                 "(Landroid/content/Intent;Ljava/lang/CharSequence;)Landroid/content/Intent;",
-                &[inner.object.into(), title_value],
+                &[(&inner.object).into(), (&title_value).into()],
             )?;
 
-            inner.object = intent.try_into()?;
+            inner.object = env.new_global_ref(intent.l()?)?;
             Ok(inner)
-        })
+        })})
     }
 
     /// Set an explicit MIME data type.
@@ -160,39 +158,39 @@ impl<'env> Intent<'env> {
     /// use android_intent::{Action, Intent};
     ///
     /// # android_intent::with_current_env(|env| {
-    /// let intent = Intent::new(env, Action::Send);
-    /// intent.set_type("text/plain");
-    /// # })
+    ///     let intent = Intent::new(env, Action::Send);
+    ///     Ok(intent.with_type("text/plain"))
+    /// # });
     /// ```
     pub fn with_type(self, type_name: impl AsRef<str>) -> Self {
-        self.and_then(|inner| {
-            let jstring = inner.env.new_string(type_name)?;
+        self.and_then(|inner| { with_current_env(|env| {
+            let jstring = env.new_string(type_name)?;
 
-            inner.env.call_method(
-                inner.object,
+            env.call_method(
+                &inner.object,
                 "setType",
                 "(Ljava/lang/String;)Landroid/content/Intent;",
-                &[jstring.into()],
+                &[(&jstring).into()],
             )?;
 
             Ok(inner)
-        })
+        })})
     }
 
     pub fn start_activity(self) -> Result<(), Error> {
         let cx = ndk_context::android_context();
         let activity = unsafe { JObject::from_raw(cx.context() as jni::sys::jobject) };
 
-        self.inner.and_then(|inner| {
-            inner.env.call_method(
+        self.inner.and_then(|inner| { with_current_env(|env| {
+            env.call_method(
                 activity,
                 "startActivity",
                 "(Landroid/content/Intent;)V",
-                &[inner.object.into()],
+                &[(&inner.object).into()],
             )?;
 
             Ok(())
-        })
+        })})
     }
 
     fn and_then(mut self, f: impl FnOnce(Inner) -> Result<Inner, Error>) -> Self {
diff --git a/src/lib.rs b/src/lib.rs
index 51cacc0..d8bae2d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -7,12 +7,16 @@ pub use extra::Extra;
 mod intent;
 pub use intent::Intent;
 use jni::{JNIEnv, JavaVM};
+use jni::errors::Error;
 
 /// Run 'f' with the current [`JNIEnv`] from [`ndk_context`].
-pub fn with_current_env(f: impl FnOnce(JNIEnv)) {
+pub fn with_current_env<F, T>(f: F) -> Result<T, Error>
+where
+    F: FnOnce(&mut JNIEnv) -> Result<T, Error>,
+{
     let cx = ndk_context::android_context();
     let vm = unsafe { JavaVM::from_raw(cx.vm().cast()) }.unwrap();
-    let env = vm.attach_current_thread().unwrap();
+    let mut env = vm.attach_current_thread().unwrap();
 
-    f(env.clone());
+    env.with_local_frame(16, |env| f(env))
 }