要实现Android Camera2的实时预览和MediaCodec输入Surface的流水线，可以按照以下步骤进行操作：

1. 创建Camera2实例并设置预览的输出Surface：

// 创建CameraManager实例
CameraManager cameraManager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);
String cameraId = cameraManager.getCameraIdList()[0]; // 获取第一个摄像头ID

// 打开摄像头并创建摄像头设备回调
cameraManager.openCamera(cameraId, new CameraDevice.StateCallback() {
    @Override
    public void onOpened(CameraDevice camera) {
        // 创建CameraCaptureSession实例
        List outputSurfaces = new ArrayList<>();
        outputSurfaces.add(previewSurface); // 预览Surface
        camera.createCaptureSession(outputSurfaces, new CameraCaptureSession.StateCallback() {
            @Override
            public void onConfigured(CameraCaptureSession session) {
                // 配置预览请求
                CaptureRequest.Builder requestBuilder = camera.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);
                requestBuilder.addTarget(previewSurface);

                // 开始预览
                session.setRepeatingRequest(requestBuilder.build(), null, null);
            }

            @Override
            public void onConfigureFailed(CameraCaptureSession session) {
                // 配置失败处理
            }
        }, null);
    }

    @Override
    public void onDisconnected(CameraDevice camera) {
        // 连接断开处理
    }

    @Override
    public void onError(CameraDevice camera, int error) {
        // 错误处理
    }
}, null);

2. 创建MediaCodec实例并配置输入Surface：

// 创建MediaCodec实例
MediaCodec encoder = MediaCodec.createEncoderByType(mimeType);

// 配置MediaFormat
MediaFormat format = MediaFormat.createVideoFormat(mimeType, width, height);
format.setInteger(MediaFormat.KEY_BIT_RATE, bitRate);
format.setInteger(MediaFormat.KEY_FRAME_RATE, frameRate);
format.setInteger(MediaFormat.KEY_COLOR_FORMAT, colorFormat);
format.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, iFrameInterval);
encoder.configure(format, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);

// 获取输入Surface
Surface inputSurface = encoder.createInputSurface();

// 开始编码
encoder.start();

3. 将Camera2的预览Surface和MediaCodec的输入Surface进行关联：

// 创建EGL14实例
EGLDisplay eglDisplay = EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY);
int[] version = new int[2];
EGL14.eglInitialize(eglDisplay, version, 0, version, 1);

// 创建EGLConfig实例
int[] attribList = {EGL14.EGL_RED_SIZE, 8, EGL14.EGL_GREEN_SIZE, 8, EGL14.EGL_BLUE_SIZE, 8, EGL14.EGL_ALPHA_SIZE, 8, EGL14.EGL_RENDERABLE_TYPE, EGL14.EGL_OPENGL_ES2_BIT, EGL14.EGL_SURFACE_TYPE, EGL14.EGL_WINDOW_BIT, EGL14.EGL_NONE};
EGLConfig[] configs = new EGLConfig[1];
int[] numConfigs = new int[1];
EGL14.eglChooseConfig(eglDisplay, attribList, 0, configs, 0, 1, numConfigs, 0);

// 创建EGLContext实例
int[] contextAttribs = {EGL14.EGL_CONTEXT_CLIENT_VERSION, 2, EGL14.EGL_NONE};
EGLContext eglContext = EGL14.eglCreateContext(eglDisplay, configs[0], EGL14.EGL_NO_CONTEXT, contextAttribs, 0);

// 创建EGLSurface实例
int[] surfaceAttribs = {EGL14.EGL_NONE};
EGLSurface eglSurface = EGL14.eglCreateWindowSurface(eglDisplay, configs[0], inputSurface, surfaceAttribs, 0);

// 绑定EGLContext和EGLSurface
EGL14.eglMakeCurrent(eglDisplay, eglSurface, eglSurface, eglContext);

// 进行循环读取Camera2预览数据，然后将数据编码并写入输出文件或网络
while (!stopEncoding) {
    // 从Camera2的预览Surface中获取预览数据
    Image image = imageReader.acquireLatestImage();
    ByteBuffer buffer = image.getPlanes()[0].getBuffer();
    byte[] data = new byte[buffer.remaining()];
    buffer.get(data);
    image.close();

    // 将预览数据