diff --git a/ndk/src/asset.rs b/ndk/src/asset.rs
index 4ae0c200..d8dbcee4 100644
--- a/ndk/src/asset.rs
+++ b/ndk/src/asset.rs
@@ -14,7 +14,7 @@ use std::{
 /// A native [`AAssetManager *`]
 ///
 /// [`AAssetManager *`]: https://developer.android.com/ndk/reference/group/asset#aassetmanager
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 #[doc(alias = "AAssetManager")]
 pub struct AssetManager {
     ptr: NonNull<ffi::AAssetManager>,
@@ -92,7 +92,7 @@ impl AssetManager {
 /// ```
 ///
 /// [`AAssetDir *`]: https://developer.android.com/ndk/reference/group/asset#aassetdir
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 #[doc(alias = "AAssetDir")]
 pub struct AssetDir {
     ptr: NonNull<ffi::AAssetDir>,
@@ -175,7 +175,7 @@ impl Iterator for AssetDir {
 /// ```
 ///
 /// [`AAsset *`]: https://developer.android.com/ndk/reference/group/asset#aasset
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 #[doc(alias = "AAsset")]
 pub struct Asset {
     ptr: NonNull<ffi::AAsset>,
diff --git a/ndk/src/audio.rs b/ndk/src/audio.rs
index 0be6e1c3..44d9b4d9 100644
--- a/ndk/src/audio.rs
+++ b/ndk/src/audio.rs
@@ -29,7 +29,7 @@ use crate::utils::abort_on_panic;
 /// [`android.media.AudioAttributes`]: https://developer.android.com/reference/android/media/AudioAttributes
 #[cfg(feature = "api-level-29")]
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "aaudio_allowed_capture_policy_t")]
 #[non_exhaustive]
 pub enum AudioAllowedCapturePolicy {
@@ -83,7 +83,7 @@ pub enum AudioAllowedCapturePolicy {
 /// [`android.media.AudioAttributes`]: https://developer.android.com/reference/android/media/AudioAttributes
 #[cfg(feature = "api-level-28")]
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "aaudio_content_type_t")]
 #[non_exhaustive]
 pub enum AudioContentType {
@@ -107,7 +107,7 @@ pub enum AudioContentType {
 }
 
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "aaudio_direction_t")]
 #[non_exhaustive]
 pub enum AudioDirection {
@@ -124,7 +124,7 @@ pub enum AudioDirection {
 }
 
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[allow(non_camel_case_types)]
 #[doc(alias = "aaudio_format_t")]
 #[non_exhaustive]
@@ -159,7 +159,7 @@ pub enum AudioFormat {
 /// Note that these match the equivalent values in MediaRecorder.AudioSource in the Android Java API.
 #[cfg(feature = "api-level-28")]
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "aaudio_input_preset_t")]
 #[non_exhaustive]
 pub enum AudioInputPreset {
@@ -193,7 +193,7 @@ pub enum AudioInputPreset {
 }
 
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "aaudio_performance_mode_t")]
 #[non_exhaustive]
 pub enum AudioPerformanceMode {
@@ -216,7 +216,7 @@ pub enum AudioPerformanceMode {
 }
 
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "aaudio_sharing_mode_t")]
 #[non_exhaustive]
 pub enum AudioSharingMode {
@@ -245,7 +245,7 @@ pub enum AudioSharingMode {
 /// [`android.media.AudioAttributes`]: https://developer.android.com/reference/android/media/AudioAttributes
 #[cfg(feature = "api-level-28")]
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "aaudio_usage_t")]
 #[non_exhaustive]
 pub enum AudioUsage {
@@ -312,7 +312,7 @@ pub enum AudioUsage {
 }
 
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "aaudio_stream_state_t")]
 #[non_exhaustive]
 pub enum AudioStreamState {
@@ -358,21 +358,21 @@ impl AudioStreamState {
     }
 }
 
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 #[doc(alias = "aaudio_session_id_t")]
 pub enum SessionId {
     None,
     Allocated(NonZeroI32),
 }
 
-#[derive(Copy, Clone, Debug)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub struct Timestamp {
     pub frame_position: i64,
     pub time_nanoseconds: i64,
 }
 
 #[repr(u32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 #[non_exhaustive]
 pub enum Clockid {
     #[doc(alias = "CLOCK_MONOTONIC")]
@@ -383,7 +383,7 @@ pub enum Clockid {
 
 /// Value returned the data callback function.
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, IntoPrimitive)]
 #[doc(alias = "aaudio_data_callback_result_t")]
 #[non_exhaustive]
 pub enum AudioCallbackResult {
@@ -399,7 +399,7 @@ pub enum AudioCallbackResult {
 }
 
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "aaudio_result_t")]
 #[non_exhaustive]
 pub enum AudioError {
@@ -983,6 +983,7 @@ impl Drop for AudioStreamBuilder {
 ///
 /// [`AAudioStream *`]: https://developer.android.com/ndk/reference/group/audio#aaudiostream
 #[doc(alias = "AAudioStream")]
+// #[derive(Debug, PartialEq, Eq, Hash)]
 pub struct AudioStream {
     inner: NonNull<ffi::AAudioStream>,
     data_callback: Option<AudioStreamDataCallback>,
diff --git a/ndk/src/bitmap.rs b/ndk/src/bitmap.rs
index 6d4d3d7b..b7ddc5e4 100644
--- a/ndk/src/bitmap.rs
+++ b/ndk/src/bitmap.rs
@@ -16,7 +16,7 @@ use crate::data_space::DataSpace;
 use crate::hardware_buffer::HardwareBufferRef;
 
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[non_exhaustive]
 pub enum BitmapError {
     #[doc(alias = "ANDROID_BITMAP_RESULT_ALLOCATION_FAILED")]
@@ -90,7 +90,7 @@ pub enum BitmapFormat {
 /// An immediate wrapper over [`android.graphics.Bitmap`]
 ///
 /// [`android.graphics.Bitmap`]: https://developer.android.com/reference/android/graphics/Bitmap
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct Bitmap {
     env: *mut JNIEnv,
     inner: jobject,
@@ -299,7 +299,7 @@ impl Bitmap {
 /// Possible values for [`ffi::ANDROID_BITMAP_FLAGS_ALPHA_MASK`] within [`BitmapInfoFlags`]
 #[repr(u32)]
 #[cfg(feature = "api-level-30")]
-#[derive(Clone, Copy, Debug, IntoPrimitive, FromPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "ANDROID_BITMAP_FLAGS_ALPHA_MASK")]
 #[non_exhaustive]
 pub enum BitmapInfoFlagsAlpha {
@@ -321,7 +321,7 @@ pub enum BitmapInfoFlagsAlpha {
 /// Bitfield containing information about the bitmap.
 #[cfg(feature = "api-level-30")]
 #[repr(transparent)]
-#[derive(Clone, Copy, Hash, PartialEq, Eq)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash)]
 pub struct BitmapInfoFlags(u32);
 
 #[cfg(feature = "api-level-30")]
@@ -359,7 +359,7 @@ impl BitmapInfoFlags {
 /// A native [`AndroidBitmapInfo`]
 ///
 /// [`AndroidBitmapInfo`]: https://developer.android.com/ndk/reference/struct/android-bitmap-info#struct_android_bitmap_info
-#[derive(Clone, Copy)]
+#[derive(Clone, Copy)] // TODO: PartialEq, Eq, Hash
 #[doc(alias = "AndroidBitmapInfo")]
 pub struct BitmapInfo {
     inner: ffi::AndroidBitmapInfo,
@@ -440,7 +440,7 @@ impl BitmapInfo {
 /// [`Bitmap::compress_raw()`].
 #[cfg(feature = "api-level-30")]
 #[repr(i32)]
-#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "AndroidBitmapCompressFormat")]
 #[non_exhaustive]
 pub enum BitmapCompressFormat {
@@ -477,7 +477,7 @@ pub enum BitmapCompressFormat {
 
 /// Encapsulates possible errors returned by [`Bitmap::compress()`] or [`Bitmap::compress_raw()`].
 #[cfg(feature = "api-level-30")]
-#[derive(Debug, thiserror::Error)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, thiserror::Error)]
 pub enum BitmapCompressError {
     #[error(transparent)]
     BitmapError(#[from] BitmapError),
diff --git a/ndk/src/configuration.rs b/ndk/src/configuration.rs
index fcd98dda..76a62a3d 100644
--- a/ndk/src/configuration.rs
+++ b/ndk/src/configuration.rs
@@ -19,6 +19,7 @@ use std::ptr::NonNull;
 /// [`Configuration`] is an opaque type used to get and set various subsystem configurations.
 ///
 /// [`AConfiguration *`]: https://developer.android.com/ndk/reference/group/configuration#aconfiguration
+// TODO: Implement hash based on ptr or contents?
 pub struct Configuration {
     ptr: NonNull<ffi::AConfiguration>,
 }
@@ -280,7 +281,7 @@ impl Configuration {
 }
 
 /// A bitfield representing the differences between two [`Configuration`]s
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub struct DiffResult(pub u32);
 
 impl DiffResult {
@@ -337,7 +338,7 @@ impl DiffResult {
     }
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum Orientation {
@@ -351,7 +352,7 @@ pub enum Orientation {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum Touchscreen {
@@ -365,7 +366,7 @@ pub enum Touchscreen {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)] // TODO: Ord?
 #[repr(i32)]
 #[non_exhaustive]
 pub enum Density {
@@ -432,7 +433,7 @@ impl Density {
     }
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum Keyboard {
@@ -446,7 +447,7 @@ pub enum Keyboard {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum Navigation {
@@ -461,7 +462,7 @@ pub enum Navigation {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum KeysHidden {
@@ -475,7 +476,7 @@ pub enum KeysHidden {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum NavHidden {
@@ -488,7 +489,7 @@ pub enum NavHidden {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)] // TODO: Ord?
 #[repr(i32)]
 #[non_exhaustive]
 pub enum ScreenSize {
@@ -503,7 +504,7 @@ pub enum ScreenSize {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum ScreenLong {
@@ -516,7 +517,7 @@ pub enum ScreenLong {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum ScreenRound {
@@ -529,7 +530,7 @@ pub enum ScreenRound {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum WideColorGamut {
@@ -542,7 +543,7 @@ pub enum WideColorGamut {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum HDR {
@@ -555,7 +556,7 @@ pub enum HDR {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum LayoutDir {
@@ -568,7 +569,7 @@ pub enum LayoutDir {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum UiModeType {
@@ -586,7 +587,7 @@ pub enum UiModeType {
     __Unknown(i32),
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum UiModeNight {
diff --git a/ndk/src/data_space.rs b/ndk/src/data_space.rs
index f25691d1..64b07ae4 100644
--- a/ndk/src/data_space.rs
+++ b/ndk/src/data_space.rs
@@ -11,7 +11,7 @@ use num_enum::{FromPrimitive, IntoPrimitive};
 ///
 /// <https://developer.android.com/ndk/reference/group/a-data-space#group___a_data_space_1ga2759ad19cae46646cc5f7002758c4a1c>
 #[repr(i32)]
-#[derive(Clone, Copy, Hash, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "ADataSpace")]
 #[non_exhaustive]
 pub enum DataSpace {
@@ -324,7 +324,7 @@ impl DataSpace {
 /// defines the chromaticity coordinates of the source primaries in terms of the CIE 1931 definition
 /// of `x` and `y` specified in ISO 11664-1.
 #[repr(i32)]
-#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "STANDARD_MASK")]
 #[non_exhaustive]
 pub enum DataSpaceStandard {
@@ -483,7 +483,7 @@ pub enum DataSpaceStandard {
 /// the `L` component. Implementation may apply the transfer function in `RGB` space for all pixel
 /// formats if desired.
 #[repr(i32)]
-#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "TRANSFER_MASK")]
 #[non_exhaustive]
 pub enum DataSpaceTransfer {
@@ -604,7 +604,7 @@ pub enum DataSpaceTransfer {
 /// Defines the range of values corresponding to the unit range of `0-1`. This is defined for
 /// `YCbCr` only, but can be expanded to `RGB` space.
 #[repr(i32)]
-#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "RANGE_MASK")]
 #[non_exhaustive]
 pub enum DataSpaceRange {
diff --git a/ndk/src/event.rs b/ndk/src/event.rs
index ef447da4..a83f90ca 100644
--- a/ndk/src/event.rs
+++ b/ndk/src/event.rs
@@ -19,7 +19,7 @@ use num_enum::{FromPrimitive, IntoPrimitive};
 /// A native [`AInputEvent *`]
 ///
 /// [`AInputEvent *`]: https://developer.android.com/ndk/reference/group/input#ainputevent
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 #[non_exhaustive]
 pub enum InputEvent {
     MotionEvent(MotionEvent),
@@ -29,7 +29,7 @@ pub enum InputEvent {
 /// Wraps a Java [`InputEvent`] acquired from [`KeyEvent::from_java()`] or
 /// [`MotionEvent::from_java()`] with respective [`Drop`] semantics.
 #[cfg(feature = "api-level-31")]
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct InputEventJava(InputEvent);
 
 #[cfg(feature = "api-level-31")]
@@ -49,7 +49,7 @@ impl Drop for InputEventJava {
 }
 
 /// An enum representing the source of an [`InputEvent`].
-#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum Source {
@@ -86,7 +86,7 @@ impl Source {
 
 bitflags::bitflags! {
     /// Flags representing the class of an [`InputEvent`] [`Source`].
-    #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
     pub struct SourceClass : u8 {
         #[doc(alias = "AINPUT_SOURCE_CLASS_BUTTON")]
         const BUTTON = ffi::AINPUT_SOURCE_CLASS_BUTTON as u8;
@@ -149,7 +149,7 @@ impl InputEvent {
 }
 
 /// A bitfield representing the state of modifier keys during an event.
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub struct MetaState(pub u32);
 
 impl MetaState {
@@ -231,7 +231,7 @@ impl MetaState {
 /// javadoc](https://developer.android.com/reference/android/view/MotionEvent).
 ///
 /// [`AInputEvent *`]: https://developer.android.com/ndk/reference/group/input#ainputevent
-#[derive(Clone, Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct MotionEvent {
     ptr: NonNull<ffi::AInputEvent>,
 }
@@ -239,7 +239,7 @@ pub struct MotionEvent {
 // TODO: thread safety?
 
 /// A motion action.
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum MotionAction {
@@ -263,7 +263,7 @@ pub enum MotionAction {
 }
 
 /// An axis of a motion event.
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum Axis {
@@ -319,7 +319,7 @@ pub enum Axis {
 }
 
 /// The tool type of a pointer.
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum ToolType {
@@ -336,7 +336,7 @@ pub enum ToolType {
 }
 
 /// A bitfield representing the state of buttons during a motion event.
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct ButtonState(pub u32);
 
 impl ButtonState {
@@ -371,7 +371,7 @@ impl ButtonState {
 }
 
 /// A bitfield representing which edges were touched by a motion event.
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct EdgeFlags(pub u32);
 
 impl EdgeFlags {
@@ -394,7 +394,7 @@ impl EdgeFlags {
 }
 
 /// Flags associated with this [`MotionEvent`].
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct MotionEventFlags(pub u32);
 
 impl MotionEventFlags {
@@ -647,7 +647,7 @@ impl MotionEvent {
 }
 
 /// A view into the data of a specific pointer in a motion event.
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct Pointer<'a> {
     event: NonNull<ffi::AInputEvent>,
     index: usize,
@@ -735,7 +735,7 @@ impl<'a> Pointer<'a> {
 }
 
 /// An iterator over the pointers in a [`MotionEvent`].
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct PointersIter<'a> {
     event: NonNull<ffi::AInputEvent>,
     next_index: usize,
@@ -773,7 +773,7 @@ impl<'a> ExactSizeIterator for PointersIter<'a> {
 }
 
 /// Represents a view into a past moment of a motion event
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct HistoricalMotionEvent<'a> {
     event: NonNull<ffi::AInputEvent>,
     history_index: usize,
@@ -814,7 +814,7 @@ impl<'a> HistoricalMotionEvent<'a> {
 /// An iterator over all the historical moments in a [`MotionEvent`].
 ///
 /// It iterates from oldest to newest.
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct HistoricalMotionEventsIter<'a> {
     event: NonNull<ffi::AInputEvent>,
     next_history_index: usize,
@@ -867,7 +867,7 @@ impl<'a> DoubleEndedIterator for HistoricalMotionEventsIter<'a> {
 }
 
 /// A view into a pointer at a historical moment
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct HistoricalPointer<'a> {
     event: NonNull<ffi::AInputEvent>,
     pointer_index: usize,
@@ -1028,7 +1028,7 @@ impl<'a> HistoricalPointer<'a> {
 }
 
 /// An iterator over the pointers in a historical motion event
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct HistoricalPointersIter<'a> {
     event: NonNull<ffi::AInputEvent>,
     history_index: usize,
@@ -1076,7 +1076,7 @@ impl ExactSizeIterator for HistoricalPointersIter<'_> {
 /// javadoc](https://developer.android.com/reference/android/view/KeyEvent).
 ///
 /// [`AInputEvent *`]: https://developer.android.com/ndk/reference/group/input#ainputevent
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct KeyEvent {
     ptr: NonNull<ffi::AInputEvent>,
 }
@@ -1085,7 +1085,7 @@ pub struct KeyEvent {
 
 /// Key actions.
 /// See [the NDK docs](https://developer.android.com/ndk/reference/group/input#anonymous-enum-27)
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum KeyAction {
@@ -1099,7 +1099,7 @@ pub enum KeyAction {
 }
 
 /// Key codes.
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[repr(i32)]
 #[non_exhaustive]
 pub enum Keycode {
@@ -1513,7 +1513,7 @@ impl KeyEvent {
 }
 
 /// Flags associated with [`KeyEvent`].
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub struct KeyEventFlags(pub u32);
 
 impl KeyEventFlags {
diff --git a/ndk/src/font.rs b/ndk/src/font.rs
index fc5b1375..ed675391 100644
--- a/ndk/src/font.rs
+++ b/ndk/src/font.rs
@@ -18,7 +18,7 @@ use num_enum::IntoPrimitive;
 /// An integer holding a valid font weight value between 1 and 1000.
 ///
 /// See the [`Font::weight`] definition for more details.
-#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct FontWeight(u16);
 
 impl FontWeight {
@@ -108,7 +108,7 @@ impl TryFrom<u16> for FontWeight {
 }
 
 /// A 4-byte integer representing an OpenType axis tag.
-#[derive(Clone, Copy, PartialEq, Eq)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash)]
 pub struct AxisTag(u32);
 
 impl AxisTag {
@@ -224,7 +224,7 @@ impl fmt::Debug for AxisTag {
 }
 
 /// The error type returned when an invalid axis tag value is passed.
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub enum AxisTagValueError {
     /// There is a byte not in the range 0x20 to 0x7E.
     InvalidCharacter,
@@ -257,7 +257,7 @@ impl std::error::Error for AxisTagValueError {}
 /// A native [`AFont *`]
 ///
 /// [`AFont *`]: https://developer.android.com/ndk/reference/group/font
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct Font {
     ptr: NonNull<ffi::AFont>,
 }
@@ -390,7 +390,7 @@ impl Drop for Font {
 ///
 /// [`AFAMILY_VARIANT_*`]: https://developer.android.com/ndk/reference/group/font#group___font_1gga96a58e29e8dbf2b5bdeb775cba46556ea662aafc7016e35d6758da93416fc0833
 #[repr(u32)]
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, IntoPrimitive)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, IntoPrimitive)]
 #[non_exhaustive]
 pub enum FamilyVariant {
     /// A family variant value for the compact font family variant.
@@ -410,7 +410,7 @@ pub enum FamilyVariant {
 /// A native [`AFontMatcher *`]
 ///
 /// [`AFontMatcher *`]: https://developer.android.com/ndk/reference/group/font#afontmatcher_create
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct FontMatcher {
     ptr: NonNull<ffi::AFontMatcher>,
 }
@@ -510,7 +510,7 @@ impl Drop for FontMatcher {
 /// A native [`ASystemFontIterator *`]
 ///
 /// [`ASystemFontIterator *`]: https://developer.android.com/ndk/reference/group/font#asystemfontiterator_open
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct SystemFontIterator {
     ptr: NonNull<ffi::ASystemFontIterator>,
 }
diff --git a/ndk/src/hardware_buffer.rs b/ndk/src/hardware_buffer.rs
index e5d4e3e3..9c9ef87a 100644
--- a/ndk/src/hardware_buffer.rs
+++ b/ndk/src/hardware_buffer.rs
@@ -21,7 +21,7 @@ use super::{hardware_buffer_format::HardwareBufferFormat, utils::status_to_io_re
 
 bitflags::bitflags! {
     /// Buffer usage flags, specifying how the buffer will be accessed.
-    #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
+    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
     #[doc(alias = "AHardwareBuffer_UsageFlags")]
     pub struct HardwareBufferUsage : u64 {
         /// The buffer will never be locked for direct CPU reads using the
@@ -228,7 +228,7 @@ fn construct<T>(with_ptr: impl FnOnce(*mut T) -> i32) -> Result<T> {
 /// [`EGL_ANDROID_image_native_buffer`]: https://www.khronos.org/registry/EGL/extensions/ANDROID/EGL_ANDROID_image_native_buffer.txt
 /// [external memory]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VK_KHR_external_memory.html
 /// [`VK_ANDROID_external_memory_android_hardware_buffer`]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VK_ANDROID_external_memory_android_hardware_buffer.html
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct HardwareBuffer {
     inner: NonNull<ffi::AHardwareBuffer>,
 }
@@ -531,7 +531,7 @@ impl HardwareBuffer {
 
 /// A [`HardwareBuffer`] with an owned reference, that is released when dropped.
 /// It behaves much like a strong [`std::rc::Rc`] reference.
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct HardwareBufferRef {
     inner: HardwareBuffer,
 }
@@ -575,7 +575,7 @@ impl Clone for HardwareBufferRef {
 /// Buffer description.
 ///
 /// Used for allocating new buffers and querying parameters of existing ones.
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub struct HardwareBufferDesc {
     pub width: u32,
     pub height: u32,
@@ -607,7 +607,7 @@ impl HardwareBufferDesc {
 /// Contains the same fields as [`ffi::AHardwareBuffer_Plane`].
 ///
 /// [`AHardwareBuffer_Plane`]: https://developer.android.com/ndk/reference/group/a-hardware-buffer#ahardwarebuffer_plane
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub struct LockedPlaneInfo {
     pub virtual_address: *mut c_void,
     pub bytes_per_pixel: u32,
@@ -615,7 +615,7 @@ pub struct LockedPlaneInfo {
 }
 
 /// Iterator over [`ffi::AHardwareBuffer_Planes`], containing a list of [`LockedPlaneInfo`].
-#[derive(Debug)]
+#[derive(Debug)] // TODO: Eq and Hash?
 pub struct HardwareBufferPlanes {
     inner: ffi::AHardwareBuffer_Planes,
     index: u32,
diff --git a/ndk/src/hardware_buffer_format.rs b/ndk/src/hardware_buffer_format.rs
index 555669f5..074ca560 100644
--- a/ndk/src/hardware_buffer_format.rs
+++ b/ndk/src/hardware_buffer_format.rs
@@ -6,7 +6,7 @@ use num_enum::{FromPrimitive, IntoPrimitive};
 
 /// Buffer pixel formats.
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[allow(non_camel_case_types)]
 #[non_exhaustive]
 pub enum HardwareBufferFormat {
diff --git a/ndk/src/input_queue.rs b/ndk/src/input_queue.rs
index 6c96228d..18a8fb77 100644
--- a/ndk/src/input_queue.rs
+++ b/ndk/src/input_queue.rs
@@ -20,7 +20,7 @@ use crate::utils::status_to_io_result;
 /// An input queue is the facility through which you retrieve input events.
 ///
 /// [`AInputQueue *`]: https://developer.android.com/ndk/reference/group/input#ainputqueue
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct InputQueue {
     ptr: NonNull<ffi::AInputQueue>,
 }
diff --git a/ndk/src/looper.rs b/ndk/src/looper.rs
index d8eb644b..980cdaa2 100644
--- a/ndk/src/looper.rs
+++ b/ndk/src/looper.rs
@@ -24,7 +24,7 @@ use crate::utils::abort_on_panic;
 /// current thread.
 ///
 /// [`ALooper *`]: https://developer.android.com/ndk/reference/group/looper#alooper
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct ThreadLooper {
     _marker: std::marker::PhantomData<*mut ()>, // Not send or sync
     foreign: ForeignLooper,
@@ -34,7 +34,7 @@ bitflags::bitflags! {
     /// Flags for file descriptor events that a looper can monitor.
     ///
     /// These flag bits can be combined to monitor multiple events at once.
-    #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
     pub struct FdEvent : u32 {
         /// The file descriptor is available for read operations.
         #[doc(alias = "ALOOPER_EVENT_INPUT")]
@@ -91,7 +91,7 @@ pub enum Poll<'fd> {
     },
 }
 
-#[derive(Debug, Copy, Clone, Error)]
+#[derive(Clone, Copy, Debug, Error)]
 #[error("Android Looper error")]
 pub struct LooperError;
 
@@ -260,7 +260,7 @@ impl ThreadLooper {
 /// A native [`ALooper *`], not necessarily allocated with the current thread.
 ///
 /// [`ALooper *`]: https://developer.android.com/ndk/reference/group/looper#alooper
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct ForeignLooper {
     ptr: ptr::NonNull<ffi::ALooper>,
 }
diff --git a/ndk/src/media/image_reader.rs b/ndk/src/media/image_reader.rs
index 2e684cd8..b2360743 100644
--- a/ndk/src/media/image_reader.rs
+++ b/ndk/src/media/image_reader.rs
@@ -19,7 +19,7 @@ use crate::utils::abort_on_panic;
 use crate::{data_space::DataSpace, hardware_buffer_format::HardwareBufferFormat};
 
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[allow(non_camel_case_types)]
 #[non_exhaustive]
 #[doc(alias = "AIMAGE_FORMATS")]
@@ -61,7 +61,7 @@ pub type BufferRemovedListener = Box<dyn FnMut(&ImageReader, &HardwareBuffer) +
 /// - [`ImageReader::acquire_next_image_async()`]`
 /// - [`ImageReader::acquire_latest_image()`]`
 /// - [`ImageReader::acquire_latest_image_async()`]`
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum AcquireResult<T> {
     /// Returned if there is no buffers currently available in the reader queue.
     #[doc(alias = "AMEDIA_IMGREADER_NO_BUFFER_AVAILABLE")]
@@ -378,7 +378,7 @@ impl Drop for ImageReader {
 /// A native [`AImage *`]
 ///
 /// [`AImage *`]: https://developer.android.com/ndk/reference/group/media#aimage
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 #[doc(alias = "AImage")]
 pub struct Image {
     inner: NonNull<ffi::AImage>,
diff --git a/ndk/src/media/media_codec.rs b/ndk/src/media/media_codec.rs
index 7d6e42ca..e2017d33 100644
--- a/ndk/src/media/media_codec.rs
+++ b/ndk/src/media/media_codec.rs
@@ -17,7 +17,7 @@ use std::{
     time::Duration,
 };
 
-#[derive(Debug, PartialEq, Eq)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub enum MediaCodecDirection {
     Decoder,
     Encoder,
@@ -26,7 +26,7 @@ pub enum MediaCodecDirection {
 /// A native [`AMediaCodec *`]
 ///
 /// [`AMediaCodec *`]: https://developer.android.com/ndk/reference/group/media#amediacodec
-#[derive(Debug)]
+#[derive(Debug)] // TODO: No eq/hash because of callbacks
 pub struct MediaCodec {
     inner: NonNull<ffi::AMediaCodec>,
     async_notify_callback: Option<Pin<Box<AsyncNotifyCallback>>>,
@@ -593,7 +593,7 @@ pub enum DequeuedOutputBufferInfoResult<'a> {
     OutputBuffersChanged,
 }
 
-#[derive(Copy, Clone, Debug)]
+#[derive(Clone, Copy, Debug)]
 pub struct BufferInfo {
     inner: ffi::AMediaCodecBufferInfo,
 }
@@ -616,7 +616,7 @@ impl BufferInfo {
     }
 }
 
-#[derive(Copy, Clone, Debug)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
 pub struct ActionCode(pub i32);
 
 impl ActionCode {
diff --git a/ndk/src/media/media_format.rs b/ndk/src/media/media_format.rs
index 4997d522..a670a24f 100644
--- a/ndk/src/media/media_format.rs
+++ b/ndk/src/media/media_format.rs
@@ -14,6 +14,7 @@ use crate::media_error::{MediaError, Result};
 /// A native [`AMediaFormat *`]
 ///
 /// [`AMediaFormat *`]: https://developer.android.com/ndk/reference/group/media#amediaformat
+#[derive(PartialEq, Eq, Hash)]
 #[doc(alias = "AMediaFormat")]
 pub struct MediaFormat {
     inner: NonNull<ffi::AMediaFormat>,
diff --git a/ndk/src/media_error.rs b/ndk/src/media_error.rs
index 99fb0d5f..3354d8ba 100644
--- a/ndk/src/media_error.rs
+++ b/ndk/src/media_error.rs
@@ -14,7 +14,7 @@ pub type Result<T, E = MediaError> = std::result::Result<T, E>;
 
 /// Media Status codes for [`media_status_t`](https://developer.android.com/ndk/reference/group/media#group___media_1ga009a49041fe39f7bdc6d8b5cddbe760c)
 #[repr(i32)]
-#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, FromPrimitive, IntoPrimitive)]
 #[doc(alias = "media_status_t")]
 #[non_exhaustive]
 pub enum MediaError {
diff --git a/ndk/src/native_activity.rs b/ndk/src/native_activity.rs
index 19c8965e..0f0e3cbd 100644
--- a/ndk/src/native_activity.rs
+++ b/ndk/src/native_activity.rs
@@ -16,7 +16,7 @@ bitflags::bitflags! {
     /// <https://developer.android.com/ndk/reference/group/native-activity#group___native_activity_1ga2f1398dba5e4a5616b83437528bdb28e>
     ///
     /// [`android.view.WindowManager.LayoutParams`]: https://developer.android.com/reference/android/view/WindowManager.LayoutParams
-    #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
     pub struct WindowFlags : u32 {
         const ALLOW_LOCK_WHILE_SCREEN_ON = ffi::AWINDOW_FLAG_ALLOW_LOCK_WHILE_SCREEN_ON;
         const DIM_BEHIND = ffi::AWINDOW_FLAG_DIM_BEHIND;
@@ -59,7 +59,7 @@ bitflags::bitflags! {
 /// `ndk_glue::native_activity()`.
 ///
 /// [`ANativeActivity *`]: https://developer.android.com/ndk/reference/struct/a-native-activity
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct NativeActivity {
     ptr: NonNull<ffi::ANativeActivity>,
 }
diff --git a/ndk/src/native_window.rs b/ndk/src/native_window.rs
index 1a339032..fb27dac3 100644
--- a/ndk/src/native_window.rs
+++ b/ndk/src/native_window.rs
@@ -19,7 +19,7 @@ pub type Rect = ffi::ARect;
 /// display or sent to other consumers, such as video encoders.
 ///
 /// [`android.view.Surface`]: https://developer.android.com/reference/android/view/Surface
-#[derive(Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct NativeWindow {
     ptr: NonNull<ffi::ANativeWindow>,
 }
@@ -294,7 +294,7 @@ impl NativeWindow {
 }
 
 /// Lock holding the next drawing surface for writing.  It is unlocked and posted on [`drop()`].
-#[derive(Debug)]
+#[derive(Debug)] // TODO: PartialEq, Eq, Hash
 pub struct NativeWindowBufferLockGuard<'a> {
     window: &'a NativeWindow,
     buffer: ffi::ANativeWindow_Buffer,
@@ -385,7 +385,7 @@ bitflags::bitflags! {
     /// Supported transforms are any combination of horizontal mirror, vertical mirror, and
     /// clockwise 90 degree rotation, in that order. Rotations of 180 and 270 degrees are made up
     /// of those basic transforms.
-    #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
+    #[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)]
     #[doc(alias = "ANativeWindowTransform")]
     pub struct NativeWindowTransform : i32 {
         #[doc(alias = "ANATIVEWINDOW_TRANSFORM_IDENTITY")]
@@ -416,7 +416,7 @@ bitflags::bitflags! {
 /// .
 #[cfg(all(feature = "nativewindow", feature = "api-level-30"))]
 #[repr(i8)]
-#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)] // TODO: IntoPrimitive
 #[doc(alias = "ANativeWindow_FrameRateCompatibility")]
 #[non_exhaustive]
 pub enum FrameRateCompatibility {
@@ -443,7 +443,7 @@ pub enum FrameRateCompatibility {
 /// Change frame rate strategy value for [`NativeWindow::set_frame_rate_with_change_strategy()`].
 #[cfg(all(feature = "nativewindow", feature = "api-level-31"))]
 #[repr(i8)]
-#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash)] // TODO: IntoPrimitive
 #[doc(alias = "ANativeWindow_ChangeFrameRateStrategy")]
 #[non_exhaustive]
 pub enum ChangeFrameRateStrategy {
diff --git a/ndk/src/surface_texture.rs b/ndk/src/surface_texture.rs
index 943b949e..6bd37072 100644
--- a/ndk/src/surface_texture.rs
+++ b/ndk/src/surface_texture.rs
@@ -13,7 +13,7 @@ use std::{io::Result, ptr::NonNull, time::Duration};
 /// An opaque type to manage [`android.graphics.SurfaceTexture`] from native code
 ///
 /// [`android.graphics.SurfaceTexture`]: https://developer.android.com/reference/android/graphics/SurfaceTexture
-#[derive(Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 pub struct SurfaceTexture {
     ptr: NonNull<ffi::ASurfaceTexture>,
 }
diff --git a/ndk/src/trace.rs b/ndk/src/trace.rs
index 8c6cd6fb..74018aad 100644
--- a/ndk/src/trace.rs
+++ b/ndk/src/trace.rs
@@ -35,11 +35,11 @@ impl Drop for Section {
 }
 
 /// Unique identifier for distinguishing simultaneous events
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)] // TODO: Clone/Copy?
 #[cfg(feature = "api-level-29")]
 pub struct Cookie(pub i32);
 
-#[derive(Debug)]
+#[derive(Debug, PartialEq, Eq, Hash)]
 #[cfg(feature = "api-level-29")]
 pub struct AsyncSection {
     section_name: CString,
@@ -74,7 +74,7 @@ impl Drop for AsyncSection {
 }
 
 #[cfg(feature = "api-level-29")]
-#[derive(Debug)]
+#[derive(Clone, Debug, PartialEq, Eq, Hash)]
 pub struct Counter {
     name: CString,
 }