Java 如何在摄像机屏幕上显示图像

这样的一个框架可以添加到相机中，如图所示吗？我已经创建了我的自定义相机屏幕，但我不知道如何放置特殊图像。我试过的方法不管用。TextureView也不支持背景图像。这是一个什么样的问题

我的自定义相机活动：

public class Camera extends AppCompatActivity {

private static final String TAG = "AndroidCameraApi";
private Button takePictureButton;
private TextureView textureView;
private static final SparseIntArray ORIENTATIONS = new SparseIntArray();

static {
    ORIENTATIONS.append(Surface.ROTATION_0, 90);
    ORIENTATIONS.append(Surface.ROTATION_90, 0);
    ORIENTATIONS.append(Surface.ROTATION_180, 270);
    ORIENTATIONS.append(Surface.ROTATION_270, 180);
}

private String cameraId;
protected CameraDevice cameraDevice;
protected CameraCaptureSession cameraCaptureSessions;
protected CaptureRequest captureRequest;
protected CaptureRequest.Builder captureRequestBuilder;
private Size imageDimension;
private ImageReader imageReader;
private File file;
private static final int REQUEST_CAMERA_PERMISSION = 200;
private boolean mFlashSupported;
private Handler mBackgroundHandler;
private HandlerThread mBackgroundThread;


@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_camera);

    textureView = (TextureView) findViewById(R.id.texture);
    assert textureView != null;
    textureView.setSurfaceTextureListener(textureListener);
    takePictureButton = (Button) findViewById(R.id.btn_takepicture);
    assert takePictureButton != null;
    takePictureButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            takePicture();
        }
    });

}

TextureView.SurfaceTextureListener textureListener = new TextureView.SurfaceTextureListener() {
    @Override
    public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
        //open your camera here
        openCamera();
    }

    @Override
    public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
        // Transform you image captured size according to the surface width and height
    }

    @Override
    public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
        return false;
    }

    @Override
    public void onSurfaceTextureUpdated(SurfaceTexture surface) {
    }
};
private final CameraDevice.StateCallback stateCallback = new CameraDevice.StateCallback() {
    @Override
    public void onOpened(CameraDevice camera) {
        //This is called when the camera is open
        Log.e(TAG, "onOpened");
        cameraDevice = camera;
        createCameraPreview();
    }

    @Override
    public void onDisconnected(CameraDevice camera) {
        cameraDevice.close();
    }

    @Override
    public void onError(CameraDevice camera, int error) {
        cameraDevice.close();
        cameraDevice = null;
    }
};
final CameraCaptureSession.CaptureCallback captureCallbackListener = new CameraCaptureSession.CaptureCallback() {
    @Override
    public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) {
        super.onCaptureCompleted(session, request, result);
        Toast.makeText(Camera.this, "Saved:" + file, Toast.LENGTH_SHORT).show();
        createCameraPreview();
    }
};

protected void startBackgroundThread() {
    mBackgroundThread = new HandlerThread("Camera Background");
    mBackgroundThread.start();
    mBackgroundHandler = new Handler(mBackgroundThread.getLooper());
}

protected void stopBackgroundThread() {
    mBackgroundThread.quitSafely();
    try {
        mBackgroundThread.join();
        mBackgroundThread = null;
        mBackgroundHandler = null;
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

protected void takePicture() {
    if (null == cameraDevice) {
        Log.e(TAG, "cameraDevice is null");
        return;
    }
    CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
    try {
        CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraDevice.getId());
        Size[] jpegSizes = null;
        if (characteristics != null) {
            jpegSizes = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP).getOutputSizes(ImageFormat.JPEG);
        }
        int width = 640;
        int height = 480;
        if (jpegSizes != null && 0 < jpegSizes.length) {
            width = jpegSizes[0].getWidth();
            height = jpegSizes[0].getHeight();
        }
        ImageReader reader = ImageReader.newInstance(width, height, ImageFormat.JPEG, 1);
        List<Surface> outputSurfaces = new ArrayList<Surface>(2);
        outputSurfaces.add(reader.getSurface());
        outputSurfaces.add(new Surface(textureView.getSurfaceTexture()));
        final CaptureRequest.Builder captureBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);
        captureBuilder.addTarget(reader.getSurface());
        captureBuilder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
        // Orientation
        int rotation = getWindowManager().getDefaultDisplay().getRotation();
        captureBuilder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation));
        final File file = new File(Environment.getExternalStorageDirectory() + "/pic.jpg");
        ImageReader.OnImageAvailableListener readerListener = new ImageReader.OnImageAvailableListener() {
            @Override
            public void onImageAvailable(ImageReader reader) {
                Image image = null;
                try {
                    image = reader.acquireLatestImage();
                    ByteBuffer buffer = image.getPlanes()[0].getBuffer();
                    byte[] bytes = new byte[buffer.capacity()];
                    buffer.get(bytes);
                    save(bytes);
                } catch (FileNotFoundException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } finally {
                    if (image != null) {
                        image.close();
                    }
                }
            }

            private void save(byte[] bytes) throws IOException {
                OutputStream output = null;
                try {
                    output = new FileOutputStream(file);
                    output.write(bytes);
                } finally {
                    if (null != output) {
                        output.close();
                    }
                }
            }
        };
        reader.setOnImageAvailableListener(readerListener, mBackgroundHandler);
        final CameraCaptureSession.CaptureCallback captureListener = new CameraCaptureSession.CaptureCallback() {
            @Override
            public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) {
                super.onCaptureCompleted(session, request, result);
                Toast.makeText(Camera.this, "Saved:" + file, Toast.LENGTH_SHORT).show();
                createCameraPreview();
            }
        };
        cameraDevice.createCaptureSession(outputSurfaces, new CameraCaptureSession.StateCallback() {
            @Override
            public void onConfigured(CameraCaptureSession session) {
                try {
                    session.capture(captureBuilder.build(), captureListener, mBackgroundHandler);
                } catch (CameraAccessException e) {
                    e.printStackTrace();
                }
            }

            @Override
            public void onConfigureFailed(CameraCaptureSession session) {
            }
        }, mBackgroundHandler);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}

protected void createCameraPreview() {
    try {
        SurfaceTexture texture = textureView.getSurfaceTexture();
        assert texture != null;
        texture.setDefaultBufferSize(imageDimension.getWidth(), imageDimension.getHeight());
        Surface surface = new Surface(texture);
        captureRequestBuilder = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
        captureRequestBuilder.addTarget(surface);
        cameraDevice.createCaptureSession(Arrays.asList(surface), new CameraCaptureSession.StateCallback() {
            @Override
            public void onConfigured(@NonNull CameraCaptureSession cameraCaptureSession) {
                //The camera is already closed
                if (null == cameraDevice) {
                    return;
                }
                // When the session is ready, we start displaying the preview.
                cameraCaptureSessions = cameraCaptureSession;
                updatePreview();
            }

            @Override
            public void onConfigureFailed(@NonNull CameraCaptureSession cameraCaptureSession) {
                Toast.makeText(Camera.this, "Configuration change", Toast.LENGTH_SHORT).show();
            }
        }, null);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}

private void openCamera() {
    CameraManager manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
    Log.e(TAG, "is camera open");
    try {
        cameraId = manager.getCameraIdList()[0];
        CameraCharacteristics characteristics = manager.getCameraCharacteristics(cameraId);
        StreamConfigurationMap map = characteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);
        assert map != null;
        imageDimension = map.getOutputSizes(SurfaceTexture.class)[0];
        // Add permission for camera and let user grant the permission
        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(Camera.this, new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_CAMERA_PERMISSION);
            return;
        }
        manager.openCamera(cameraId, stateCallback, null);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
    Log.e(TAG, "openCamera X");
}

protected void updatePreview() {
    if (null == cameraDevice) {
        Log.e(TAG, "updatePreview error, return");
    }
    captureRequestBuilder.set(CaptureRequest.CONTROL_MODE, CameraMetadata.CONTROL_MODE_AUTO);
    try {
        cameraCaptureSessions.setRepeatingRequest(captureRequestBuilder.build(), null, mBackgroundHandler);
    } catch (CameraAccessException e) {
        e.printStackTrace();
    }
}

private void closeCamera() {
    if (null != cameraDevice) {
        cameraDevice.close();
        cameraDevice = null;
    }
    if (null != imageReader) {
        imageReader.close();
        imageReader = null;
    }
}

@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
    if (requestCode == REQUEST_CAMERA_PERMISSION) {
        if (grantResults[0] == PackageManager.PERMISSION_DENIED) {
            // close the app
            Toast.makeText(Camera.this, "Sorry!!!, you can't use this app without granting permission", Toast.LENGTH_LONG).show();
            finish();
        }
    }
}

@Override
protected void onResume() {
    super.onResume();
    Log.e(TAG, "onResume");
    startBackgroundThread();
    if (textureView.isAvailable()) {
        openCamera();
    } else {
        textureView.setSurfaceTextureListener(textureListener);
    }
}

@Override
protected void onPause() {
    Log.e(TAG, "onPause");
    //closeCamera();
    stopBackgroundThread();
    super.onPause();
}

公共类摄影机扩展应用程序活动{
私有静态最终字符串标记=“AndroidCameraApi”；
私人按钮takePictureButton；
私有纹理视图纹理视图；
专用静态最终SparseIntArray方向=新SparseIntArray（）；
静止的{
方向。附加（Surface.ROTATION_0,90）；
方向。附加（Surface.ROTATION_90,0）；
方向。附加（Surface.ROTATION_180，270）；
方向。附加（Surface.ROTATION_270，180）；
}
私用字符串；
受保护的摄像机设备摄像机设备；
受保护的CameraCaptureSession cameraCaptureSessions；
受保护的CaptureRequest CaptureRequest；
受保护的CaptureRequest.Builder captureRequestBuilder；
私人规模；
私人图像阅读器；
私有文件；
私有静态最终int请求\摄像机\权限=200；
支持私有布尔值；
私人处理程序mBackgroundHandler；
私有HandlerThread mBackgroundThread；
@凌驾
创建时受保护的void（Bundle savedInstanceState）{
super.onCreate（savedInstanceState）；
setContentView（R.layout.activity_摄像头）；
textureView=（textureView）findViewById（R.id.texture）；
断言textureView！=null；
setSurfaceTextureListener（textureListener）；
takePictureButton=（按钮）findViewById（R.id.btn_takepicture）；
断言takePictureButton！=null；
takePictureButton.setOnClickListener（新视图.OnClickListener（）{
@凌驾
公共void onClick（视图v）{
拍摄照片（）；
}
});
}
TextureView.SurfaceTextureListener textureListener=新的TextureView.SurfaceTextureListener（）{
@凌驾
SurfaceTextureAvailable上的公共空心（SurfaceTexture曲面、整型宽度、整型高度）{
//在这里打开你的相机
openCamera（）；
}
@凌驾
SurfaceTextureSizeChanged上的公共空心（SurfaceTexture surface，int-width，int-height）{
//根据曲面宽度和高度变换图像捕获的大小
}
@凌驾
公共布尔onSurfaceTextureDestroyed（SurfaceTexture曲面）{
返回false；
}
@凌驾
已更新SurfaceTexture上的公共空间（SurfaceTexture surface）{
}
};
私有最终CameraDevice.StateCallback StateCallback=新CameraDevice.StateCallback（）{
@凌驾
打开公共空间（摄像头副摄像头）{
//当相机打开时，将调用此选项
日志e（标签“打开”）；
cameraDevice=摄像机；
createCameraPreview（）；
}
@凌驾
已断开连接的公共空间（摄像头副摄像头）{
cameraDevice.close（）；
}
@凌驾
公共无效onError（摄像头设备摄像头，int错误）{
cameraDevice.close（）；
cameraDevice=null；
}
};
final CameraCaptureSession.CaptureCallback captureCallbackListener=新的CameraCaptureSession.CaptureCallback（）{
@凌驾
捕获完成后的公共void（CameraCaptureSession会话、CaptureRequest请求、TotalCaptureResult）{
super.onCaptureCompleted（会话、请求、结果）；
Toast.makeText（Camera.this，“Saved:+文件，Toast.LENGTH_SHORT）.show（）；
createCameraPreview（）；
}
};
受保护的无效startBackgroundThread（）{
mBackgroundThread=新的HandlerThread（“摄像头背景”）；
mBackgroundThread.start（）；
mBackgroundHandler=新处理程序（mBackgroundThread.getLooper（））；
}
受保护的无效stopBackgroundThread（）{
mBackgroundThread.quitsafety（）；
试一试{
mBackgroundThread.join（）；
mBackgroundThread=null；
mBackgroundHandler=null；
}捕捉（中断异常e）{
e、 printStackTrace（）；
}
}
受保护的无效照片（）{
如果（null==cameraDevice）{
Log.e（标记“cameraDevice为空”）；
返回；
}
CameraManager=（CameraManager）getSystemService（Context.CAMERA_服务）；
试一试{
CameraCharacteristics characteristics=manager.getCameraCharacteristics（cameraDevice.getId（））；
Size[]jpegsize=null；
如果（特征！=null）{
jpegSizes=characteristics.get（CameraCharacteristics.SCALER\u STREAM\u CONFIGURATION\u MAP）.getOutputSizes（ImageFormat.JPEG）；
}
整数宽度=640；
内部高度=480；
if（jpegSizes！=null&&0