Следующий код взят из CameraXBasic проекта Github
CameraFragment.kt сначала загружает фрагмент_камера.xml , затем загружает camera_ui_container.xml .
Я нахожу странным, что проект CameraXBasic не объединяет два файла макета: фрагмент_camera.xml и camera_ui_container.xml в один и CameraFragment.kt загружает только объединенный файл макета.
CameraFragment.kt
class CameraFragment : Fragment() {
override fun onCreateView(
inflater: LayoutInflater,
container: ViewGroup?,
savedInstanceState: Bundle?): View? =
inflater.inflate(R.layout.fragment_camera, container, false)
private fun updateCameraUi() {
// Remove previous UI if any
container.findViewById<ConstraintLayout>(R.id.camera_ui_container)?.let {
container.removeView(it)
}
// Inflate a new view containing all UI for controlling the camera
val controls = View.inflate(requireContext(), R.layout.camera_ui_container, container)
..
}
}
frag_camera.xml
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/camera_container"
android:background="@android:color/black"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextureView
android:id="@+id/view_finder"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</androidx.constraintlayout.widget.ConstraintLayout>
camera_ui_container.xml
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/camera_ui_container"
android:layout_width="match_parent"
android:layout_height="match_parent">
<!-- Camera control and gallery buttons -->
<ImageButton
android:id="@+id/camera_switch_button"
android:layout_width="@dimen/round_button_medium"
android:layout_height="@dimen/round_button_medium"
android:layout_marginBottom="@dimen/margin_xlarge"
android:layout_marginLeft="@dimen/margin_small"
android:padding="@dimen/spacing_small"
android:scaleType="fitCenter"
android:background="@android:color/transparent"
app:srcCompat="@drawable/ic_switch"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:contentDescription="@string/switch_camera_button_alt" />
<ImageButton
android:id="@+id/camera_capture_button"
android:layout_width="@dimen/round_button_large"
android:layout_height="@dimen/round_button_large"
android:layout_marginBottom="@dimen/shutter_button_margin"
android:scaleType="fitCenter"
android:background="@drawable/ic_shutter"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:contentDescription="@string/capture_button_alt" />
<ImageButton
android:id="@+id/photo_view_button"
android:layout_width="@dimen/round_button_medium"
android:layout_height="@dimen/round_button_medium"
android:layout_marginBottom="@dimen/margin_xlarge"
android:layout_marginRight="@dimen/margin_small"
android:padding="@dimen/spacing_large"
android:scaleType="fitCenter"
android:background="@drawable/ic_outer_circle"
app:srcCompat="@drawable/ic_photo"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:contentDescription="@string/gallery_button_alt" />
</androidx.constraintlayout.widget.ConstraintLayout>
Добавленный контент
Я тестируюобъединенный макет (Normal и Landacpe), он работает хорошо, и я думаю, что скорость как оригинала, так и моего почти одинаковы.
CameraFragment.kt (New)
private fun updateCameraUi() {
// Remove previous UI if any
// container.findViewById<ConstraintLayout>(R.id.camera_ui_container)?.let {
// container.removeView(it)
//}
// Inflate a new view containing all UI for controlling the camera
//val controls = View.inflate(requireContext(), R.layout.camera_ui_container, container)
// Listener for button used to capture photo
...
}
frag_camera.xml (новый)
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/camera_container"
android:background="@android:color/black"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextureView
android:id="@+id/view_finder"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- Camera control and gallery buttons -->
<ImageButton
android:id="@+id/camera_switch_button"
android:layout_width="@dimen/round_button_medium"
android:layout_height="@dimen/round_button_medium"
android:layout_marginBottom="@dimen/margin_xlarge"
android:layout_marginLeft="@dimen/margin_small"
android:padding="@dimen/spacing_small"
android:scaleType="fitCenter"
android:background="@android:color/transparent"
app:srcCompat="@drawable/ic_switch"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:contentDescription="@string/switch_camera_button_alt" />
<ImageButton
android:id="@+id/camera_capture_button"
android:layout_width="@dimen/round_button_large"
android:layout_height="@dimen/round_button_large"
android:layout_marginBottom="@dimen/shutter_button_margin"
android:scaleType="fitCenter"
android:background="@drawable/ic_shutter"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:contentDescription="@string/capture_button_alt" />
<ImageButton
android:id="@+id/photo_view_button"
android:layout_width="@dimen/round_button_medium"
android:layout_height="@dimen/round_button_medium"
android:layout_marginBottom="@dimen/margin_xlarge"
android:layout_marginRight="@dimen/margin_small"
android:padding="@dimen/spacing_large"
android:scaleType="fitCenter"
android:background="@drawable/ic_outer_circle"
app:srcCompat="@drawable/ic_photo"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:contentDescription="@string/gallery_button_alt" />
</androidx.constraintlayout.widget.ConstraintLayout>
фрагмент_camera.xml (новая земля)
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/camera_container"
android:background="@android:color/black"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextureView
android:id="@+id/view_finder"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<!-- Camera control and gallery buttons -->
<ImageButton
android:id="@id/camera_switch_button"
android:layout_width="@dimen/round_button_medium"
android:layout_height="@dimen/round_button_medium"
android:layout_marginRight="@dimen/margin_xlarge"
android:layout_marginBottom="@dimen/margin_small"
android:padding="@dimen/spacing_small"
android:scaleType="fitXY"
android:background="@android:color/transparent"
app:srcCompat="@drawable/ic_switch"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintBottom_toBottomOf="parent"
android:contentDescription="@string/gallery_button_alt" />
<ImageButton
android:id="@id/camera_capture_button"
android:layout_width="@dimen/round_button_large"
android:layout_height="@dimen/round_button_large"
android:layout_marginRight="@dimen/shutter_button_margin"
android:background="@drawable/ic_shutter"
android:contentDescription="@string/capture_button_alt"
android:scaleType="fitXY"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintTop_toTopOf="parent" />
<ImageButton
android:id="@id/photo_view_button"
android:layout_width="@dimen/round_button_medium"
android:layout_height="@dimen/round_button_medium"
android:layout_marginRight="@dimen/margin_xlarge"
android:layout_marginTop="@dimen/margin_small"
android:padding="@dimen/spacing_large"
android:scaleType="fitXY"
android:background="@drawable/ic_outer_circle"
app:srcCompat="@drawable/ic_photo"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent"
android:contentDescription="@string/switch_camera_button_alt" />
</androidx.constraintlayout.widget.ConstraintLayout>