Question

我在启动时面临OnClick问题按钮视频录制将在android中启动。当应用程序启动时，它将开始录制视频，但我希望视频录制将在启动按钮单击后启动。所以请帮助我。我使用了SurfaceView并在清单中使用了权限。

public class CameraActivity extends Activity implements SurfaceHolder.Callback {
    private MediaRecorder recorder;
    private SurfaceHolder surfaceHolder;
    private CamcorderProfile camcorderProfile;
    private Camera camera;
    boolean recording = false;
    boolean usecamera = true;
    boolean previewRunning = false;
    SurfaceView surfaceView;
    Button btnStart, btnStop;
    File root;
    File file;
    Boolean isSDPresent;
    SimpleDateFormat simpleDateFormat;
    String timeStamp;
    private final String VIDEO_PATH_NAME = "/sdcard/";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_camera);
        recording = false;
        initComs();
        actionListener();
    }
    private void initComs() {
        simpleDateFormat = new SimpleDateFormat("ddMMyyyyhhmmss");
        timeStamp = simpleDateFormat.format(new Date());
        camcorderProfile = CamcorderProfile.get(CamcorderProfile.QUALITY_HIGH);
        surfaceView = (SurfaceView) findViewById(R.id.surfaceView1);
        surfaceHolder = surfaceView.getHolder();
        surfaceHolder.addCallback(this);
        btnStop = (Button) findViewById(R.id.buttonExit);
        btnStart = (Button) findViewById(R.id.buttonAnswer);
        surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
        isSDPresent = android.os.Environment.getExternalStorageState().equals(
                android.os.Environment.MEDIA_MOUNTED);
    }
    private void actionListener() {
        btnStop.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (recording) {
                    recorder.stop();
                    if (usecamera) {
                        try {
                            camera.reconnect();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }
                    recording = false;
                    prepareRecorder();
                    Toast.makeText(getApplicationContext(), "Clicked on Stopped", Toast.LENGTH_LONG).show();
                    finish();
                }
            }
        });
        btnStart.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                recording = true;
                recorder.start();
            }
        });
    }

    private void prepareRecorder() {
        recorder = new MediaRecorder();
        recorder.setPreviewDisplay(surfaceHolder.getSurface());
        if (usecamera) {
            camera.unlock();
            recorder.setCamera(camera);
        }
        recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
        recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);
        recorder.setProfile(camcorderProfile);
        if (camcorderProfile.fileFormat == MediaRecorder.OutputFormat.MPEG_4) {
            recorder.setOutputFile(VIDEO_PATH_NAME + "XYZAppVideo" + ""
                    + new SimpleDateFormat("ddMMyyyyHHmmss").format(new Date())
                    + ".mp4");
        } else if (camcorderProfile.fileFormat == MediaRecorder.OutputFormat.MPEG_4) {
            recorder.setOutputFile(VIDEO_PATH_NAME + "XYZAppVideo" + ""
                    + new SimpleDateFormat("ddMMyyyyHHmmss").format(new Date())
                    + ".mp4");
        } else {
            recorder.setOutputFile(VIDEO_PATH_NAME + "XYZAppVideo" + ""
                    + new SimpleDateFormat("ddMMyyyyHHmmss").format(new Date())
                    + ".mp4");
        }

        try {
            recorder.prepare();
        } catch (IllegalStateException e) {
            e.printStackTrace();
            finish();
        } catch (IOException e) {
            e.printStackTrace();
            finish();
        }
    }
    public void surfaceCreated(SurfaceHolder holder) {
        System.out.println("onsurfacecreated");

        if (usecamera) {
            camera = Camera.open();

            try {
                camera.setPreviewDisplay(holder);
                camera.startPreview();
                previewRunning = true;
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public void surfaceChanged(SurfaceHolder holder, int format, int width,
                               int height) {
        System.out.println("onsurface changed");

        if (!recording && usecamera) {
            if (previewRunning) {
                camera.stopPreview();
            }

            try {
                Camera.Parameters p = camera.getParameters();
                p.setPreviewSize(camcorderProfile.videoFrameWidth,
                        camcorderProfile.videoFrameHeight);
                p.setPreviewFrameRate(camcorderProfile.videoFrameRate);
                camera.setParameters(p);
                camera.setPreviewDisplay(holder);
                camera.startPreview();
                previewRunning = true;
            } catch (IOException e) {
                e.printStackTrace();
            }

            prepareRecorder();
            if (!recording) {
                recording = true;
                recorder.start();
            }
        }
    }

    public void surfaceDestroyed(SurfaceHolder holder) {
        if (recording) {
            recorder.stop();
            recording = false;
        }
        recorder.release();
        if (usecamera) {
            previewRunning = false;
            camera.release();
        }
        finish();
    }
}

Answer 1

此代码可以正常工作：

public class VideoCapture extends Activity implements OnClickListener, SurfaceHolder.Callback {
  MediaRecorder recorder;
  SurfaceHolder holder;
  boolean recording = false;

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
            WindowManager.LayoutParams.FLAG_FULLSCREEN);
    setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);

    recorder = new MediaRecorder();
    initRecorder();
    setContentView(R.layout.main);

    SurfaceView cameraView = (SurfaceView) findViewById(R.id.CameraView);
    holder = cameraView.getHolder();
    holder.addCallback(this);
    holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

    cameraView.setClickable(true);
    cameraView.setOnClickListener(this);
  }

  private void initRecorder() {
    recorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
    recorder.setVideoSource(MediaRecorder.VideoSource.DEFAULT);

    CamcorderProfile cpHigh = CamcorderProfile
            .get(CamcorderProfile.QUALITY_HIGH);
    recorder.setProfile(cpHigh);
    recorder.setOutputFile("/sdcard/videocapture_example.mp4");
    recorder.setMaxDuration(50000); // 50 seconds
    recorder.setMaxFileSize(5000000); // Approximately 5 megabytes
  }

  private void prepareRecorder() {
    recorder.setPreviewDisplay(holder.getSurface());

    try {
        recorder.prepare();
    } catch (IllegalStateException e) {
        e.printStackTrace();
        finish();
    } catch (IOException e) {
        e.printStackTrace();
        finish();
    }
  }

  public void onClick(View v) {
    if (recording) {
        recorder.stop();
        recording = false;

        // Let's initRecorder so we can record again
        initRecorder();
        prepareRecorder();
    } else {
        recording = true;
        recorder.start();
    }
  }

  public void surfaceCreated(SurfaceHolder holder) {
    prepareRecorder();
  }

  public void surfaceChanged(SurfaceHolder holder, int format, int width,
        int height) {
  }

  public void surfaceDestroyed(SurfaceHolder holder) {
    if (recording) {
        recorder.stop();
        recording = false;
    }
    recorder.release();
    finish();
  }
}

单击开始按钮视频录制将在android中启动

1 个答案: