Android平台 java语音 编写 摄像头实时视频数据保存及ftp上传的实例

以下是一个Android平台Java语音编写的摄像头实时视频数据保存及FTP上传的示例：

1. 首先，你需要在AndroidManifest.xml文件中添加以下权限：

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />

2. 确认你已添加了相机相关的依赖库，例如：

implementation 'com.android.support:appcompat-v7:28.0.0'
implementation 'com.android.support.constraint:constraint-layout:1.1.3'
implementation 'com.android.support:design:28.0.0'
implementation 'com.android.support:support-v4:28.0.0'
implementation 'com.android.support:recyclerview-v7:28.0.0'
implementation 'com.android.support:cardview-v7:28.0.0'
implementation 'com.google.android.gms:play-services-vision:19.0.0'
implementation 'org.apache.commons:commons-io:1.3.2'

3. 在MainActivity.java文件中，添加以下代码来启动相机并实时保存视频数据：

public class MainActivity extends AppCompatActivity implements CameraBridgeViewBase.CvCameraViewListener2 {

    private CameraBridgeViewBase mOpenCvCameraView;
    private Mat mRgba;
    private File mVideoFile;
    private FileOutputStream mVideoOutputStream;

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

        mOpenCvCameraView = findViewById(R.id.camera_view);
        mOpenCvCameraView.setVisibility(SurfaceView.VISIBLE);
        mOpenCvCameraView.setCvCameraViewListener(this);

        mRgba = new Mat();

        // 创建视频文件和输出流
        try {
            File dir = new File(Environment.getExternalStorageDirectory(), "MyApp");
            if (!dir.exists()) {
                dir.mkdirs();
            }
            mVideoFile = new File(dir, "video.mp4");
            if (mVideoFile.exists()) {
                mVideoFile.delete();
            }
            mVideoOutputStream = new FileOutputStream(mVideoFile);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onCameraViewStarted(int width, int height) {
    }

    @Override
    public void onCameraViewStopped() {
    }

    @Override
    public Mat onCameraFrame(CameraBridgeViewBase.CvCameraViewFrame inputFrame) {
        mRgba = inputFrame.rgba();

        // 写入视频数据到文件
        try {
            Bitmap bitmap = Bitmap.createBitmap(mRgba.cols(), mRgba.rows(), Bitmap.Config.ARGB_8888);
            Utils.matToBitmap(mRgba, bitmap);
            ByteArrayOutputStream stream = new ByteArrayOutputStream();
            bitmap.compress(Bitmap.CompressFormat.JPEG, 100, stream);
            byte[] byteArray = stream.toByteArray();
            mVideoOutputStream.write(byteArray);
            stream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return mRgba;
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (OpenCVLoader.initDebug()) {
            Log.d("MainActivity", "OpenCV loaded successfully");
            mOpenCvCameraView.enableView();
        } else {
            Log.d("MainActivity", "OpenCV not loaded");
        }
    }

    @Override
    protected void onPause() {
        super.onPause();
        if (mOpenCvCameraView != null) {
            mOpenCvCameraView.disableView();
        }

        // 关闭视频输出流
        try {
            mVideoOutputStream.flush();
            mVideoOutputStream.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        if (mOpenCvCameraView != null) {
            mOpenCvCameraView.disableView();
        }

        // 删除视频文件
        if (mVideoFile != null && mVideoFile.exists()) {
            mVideoFile.delete();
        }
    }
}

4. 添加FTP上传代码，例如：

public void uploadFileToFTP() {
    FTPClient ftpClient = new FTPClient();
    try {
        ftpClient.connect("ftp.example.com");
        ftpClient.login("username", "password");
        ftpClient.enterLocalPassiveMode();
        ftpClient.setFileType(FTP.BINARY_FILE_TYPE);

        FileInputStream inputStream = new FileInputStream(mVideoFile);
        ftpClient.storeFile("video.mp4", inputStream);
        inputStream.close();

        ftpClient.logout();
        ftpClient.disconnect();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

请注意，这只是一个示例代码，你需要根据你的具体需求进行修改和优化。