Camera

dependencies {
    implementation 'com.github.duanhong169:camera:${latestVersion}'
    ...
}

<top.defaults.camera.CameraView
    android:id="@+id/preview"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerInParent="true"
    app:mode="video"
    app:aspectRatio="4:3"
    app:autoFocus="true"
    app:facing="back"
    app:fillSpace="false"
    app:flash="auto"
    app:pinchToZoom="false"
    app:showFocusIndicator="true"/>

@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    
    // ...

    CameraView preview = findViewById(R.id.preview);
    photographer = PhotographerFactory.createPhotographerWithCamera2(this, preview);
    
    // ...
}

    photographer.setOnEventListener(new SimpleOnEventListener() {
        @Override
        public void onDeviceConfigured() {}

        @Override
        public void onPreviewStarted() {}

        @Override
        public void onZoomChanged(float zoom) {}

        @Override
        public void onPreviewStopped() {}

        @Override
        public void onStartRecording() {}

        @Override
        public void onFinishRecording(String filePath) {}

        @Override
        public void onShotFinished(String filePath) {}

        @Override
        public void onError(Error error) {}
    });

    @Override
    protected void onResume() {
        super.onResume();
        photographer.startPreview();
    }

    @Override
    protected void onPause() {
        photographer.stopPreview();
        super.onPause();
    }

photographerHelper = new PhotographerHelper(photographer); // init with photographer
photographerHelper.setFileDir(Commons.MEDIA_DIR); // set directory for image/video saving
photographerHelper.flip(); // flip back/front camera
photographerHelper.switchMode(); // switch between image capture/video record