如何在android中使用攝像頭捕捉圖像和視頻？

9

股票相機應用是開源的。爲什麼不只是take a look它是如何實現的？

2012-11-15 09:25:55 wojciii

0

我不知道它的工作或沒有，但嘗試通過在surfaceCreated(SurfaceHolder holder)使用 camera.setPreviewDisplay(holder); 或recorder.setPreviewDisplay(holder);這

你應該有 MediaRecorder recorder; Camera camera;

嘗試視頻和照片之間的切換。當你切換時，你應該重新創建surfaceView。股票相機應用重新創建整個活動。

來源

2012-11-28 23:27:48 jumper0k

4

添加切換按鈕並在其中設置一些值。讓我們說0或1 ，然後捕獲圖像/錄製視頻按鈕。當切換值爲0時調用攝像機方法，當切換值爲1時調用視頻方法。

這裏是攝像頭和視頻錄製

Capture image

Record Video

實現一類兩類方法的代碼。然後調用onSnapClick攝像頭和startRecording（）視頻。

希望這會有所幫助。

來源

2012-11-30 20:04:20 Zohaib

+0

記錄視頻鏈接已損壞。 –

3

嘗試使用默認功能，攝像頭和視頻的喜歡這 -

Intent intent1 = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 
        String fileName = "KeyICamImage"+System.currentTimeMillis()+".JPG"; 
        String mPathImage = Environment.getExternalStorageDirectory()+ "/" + fileName; 
        file = new File(mPathImage); 
        mImageCaptureUri= Uri.fromFile(file); 

        try 
        { 

         intent1.putExtra(android.provider.MediaStore.EXTRA_OUTPUT,mImageCaptureUri); 
         startActivityForResult(intent1, PICK_FROM_CAMERA); 
        } 

        catch (Exception e) 
        { 
        e.printStackTrace(); 
        } 
       } 
      });

來源

2012-12-03 11:56:47 Ravi

+0

使用'ACTION_IMAGE_CAPTURE'我們只能捕捉圖像，但不能錄製視頻。 – Chip

4

使用拖車按鈕一個用於圖像和其他在UI視頻....

/**** Camera/Video Demo ****************/ 
public class CameraDemoActivity extends Activity { 
    // Activity request codes 
    private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100; 
    private static final int CAMERA_CAPTURE_VIDEO_REQUEST_CODE = 200; 
    public static final int MEDIA_TYPE_IMAGE = 1; 
    public static final int MEDIA_TYPE_VIDEO = 2; 

    // directory name to store captured images and videos 
    private static final String IMAGE_DIRECTORY_NAME = "Hello Camera"; 

    private Uri fileUri; // file url to store image/video 

    private ImageView imgPreview; 
    private VideoView videoPreview; 
    private Button btnCapturePicture, btnRecordVideo; 

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

     imgPreview = (ImageView) findViewById(R.id.imgPreview); 
     videoPreview = (VideoView) findViewById(R.id.videoPreview); 
     btnCapturePicture = (Button) findViewById(R.id.btnCapturePicture); 
     btnRecordVideo = (Button) findViewById(R.id.btnRecordVideo); 

     /* 
     * Capture image button click event 
     */ 
     btnCapturePicture.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // capture picture 
       captureImage(); 
      } 
     }); 

     /* 
     * Record video button click event 
     */ 
     btnRecordVideo.setOnClickListener(new View.OnClickListener() { 

      @Override 
      public void onClick(View v) { 
       // record video 
       recordVideo(); 
      } 
     }); 

     // Checking camera availability 
     if (!isDeviceSupportCamera()) { 
      Toast.makeText(getApplicationContext(), 
        "Sorry! Your device doesn't support camera", 
        Toast.LENGTH_LONG).show(); 
      // will close the app if the device does't have camera 
      finish(); 
     } 
    } 

    /** 
    * Checking device has camera hardware or not 
    * */ 
    private boolean isDeviceSupportCamera() { 
     if (getApplicationContext().getPackageManager().hasSystemFeature(
       PackageManager.FEATURE_CAMERA)) { 
      // this device has a camera 
      return true; 
     } else { 
      // no camera on this device 
      return false; 
     } 
    } 

    /* 
    * Capturing Camera Image will lauch camera app requrest image capture 
    */ 
    private void captureImage() { 
     Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); 

     fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE); 

     intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); 

     // start the image capture Intent 
     startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE); 
    } 

    /* 
    * Here we store the file url as it will be 
    * null after returning from camera 
    * app 
    */ 
    @Override 
    protected void onSaveInstanceState(Bundle outState) { 
     super.onSaveInstanceState(outState); 

     // save file url in bundle as it will be null on scren orientation 
     // changes 
     outState.putParcelable("file_uri", fileUri); 
    } 

    @Override 
    protected void onRestoreInstanceState(Bundle savedInstanceState) { 
     super.onRestoreInstanceState(savedInstanceState); 

     // get the file url 
     fileUri = savedInstanceState.getParcelable("file_uri"); 
    } 

    /* 
    * Recording video 
    */ 
    private void recordVideo() { 
     Intent intent = new Intent(MediaStore.ACTION_VIDEO_CAPTURE); 

     fileUri = getOutputMediaFileUri(MEDIA_TYPE_VIDEO); 

     // set video quality 
     intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1); 

     intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri); // set the 
                  // image file 
                  // name 

     // start the video capture Intent 
     startActivityForResult(intent, CAMERA_CAPTURE_VIDEO_REQUEST_CODE); 
    } 

    /** 
    * Receiving activity result method 
    * will be called after closing the camera 
    * */ 
    @Override 
    protected void onActivityResult(int requestCode, 
            int resultCode, Intent data) { 

     // if the result is capturing Image 
     if (requestCode == CAMERA_CAPTURE_IMAGE_REQUEST_CODE) { 
      if (resultCode == RESULT_OK) { 
       // successfully captured the image 
       // display it in image view 
       previewCapturedImage(); 
      } else if (resultCode == RESULT_CANCELED) { 
       // user cancelled Image capture 
       Toast.makeText(getApplicationContext(), 
         "User cancelled image capture", Toast.LENGTH_SHORT) 
         .show(); 
      } else { 
       // failed to capture image 
       Toast.makeText(getApplicationContext(), 
         "Sorry! Failed to capture image", Toast.LENGTH_SHORT) 
         .show(); 
      } 
     } else if (requestCode == CAMERA_CAPTURE_VIDEO_REQUEST_CODE) { 
      if (resultCode == RESULT_OK) { 
       // video successfully recorded 
       // preview the recorded video 
       previewVideo(); 
      } else if (resultCode == RESULT_CANCELED) { 
       // user cancelled recording 
       Toast.makeText(getApplicationContext(), 
         "User cancelled video recording", Toast.LENGTH_SHORT) 
         .show(); 
      } else { 
       // failed to record video 
       Toast.makeText(getApplicationContext(), 
         "Sorry! Failed to record video", Toast.LENGTH_SHORT) 
         .show(); 
      } 
     } 
    } 

    /* 
    * Display image from a path to ImageView 
    */ 
    private void previewCapturedImage() { 
     try { 
      // hide video preview 
      videoPreview.setVisibility(View.GONE); 

      imgPreview.setVisibility(View.VISIBLE); 

      // bimatp factory 
      BitmapFactory.Options options = new BitmapFactory.Options(); 

      // downsizing image as it throws OutOfMemory Exception for larger 
      // images 
      options.inSampleSize = 8; 

      final Bitmap bitmap = BitmapFactory.decodeFile(fileUri.getPath(), 
        options); 

      imgPreview.setImageBitmap(bitmap); 
     } catch (NullPointerException e) { 
      e.printStackTrace(); 
     } 
    } 

    /* 
    * Previewing recorded video 
    */ 
    private void previewVideo() { 
     try { 
      // hide image preview 
      imgPreview.setVisibility(View.GONE); 

      videoPreview.setVisibility(View.VISIBLE); 
      videoPreview.setVideoPath(fileUri.getPath()); 
      // start playing 
      videoPreview.pause(); 
     } catch (Exception e) { 
      e.printStackTrace(); 
     } 
    } 

    /** 
    * ------------ Helper Methods ---------------------- 
    * */ 

    /* 
    * Creating file uri to store image/video 
    */ 
    public Uri getOutputMediaFileUri(int type) { 
     return Uri.fromFile(getOutputMediaFile(type)); 
    } 

    /* 
    * returning image/video 
    */ 
    private static File getOutputMediaFile(int type) { 

     // External sdcard 
     // location.getExternalStoragePublicDirectory(
     // Environment.DIRECTORY_PICTURES),IMAGE_DIRECTORY_NAME); 
     File mediaStorageDir = new File(
       Environment 
         .getExternalStorageDirectory(), 
       IMAGE_DIRECTORY_NAME); 

     // Create the storage directory if it does not exist 
     if (!mediaStorageDir.exists()) { 
      if (!mediaStorageDir.mkdirs()) { 
       Log.d(IMAGE_DIRECTORY_NAME, "Oops! Failed create " 
         + IMAGE_DIRECTORY_NAME + " directory"); 
       return null; 
      } 
     } 

     // Create a media file name 
     String timeStamp = new SimpleDateFormat("yyyyMMddHHmmss", 
       Locale.getDefault()).format(new Date()); 
     File mediaFile; 
     if (type == MEDIA_TYPE_IMAGE) { 
      mediaFile = new File(mediaStorageDir.getPath() + File.separator 
        + "IMG_" + timeStamp + ".jpg"); 
     } else if (type == MEDIA_TYPE_VIDEO) { 
      mediaFile = new File(mediaStorageDir.getPath() + File.separator 
        + "VID_" + timeStamp + ".mp4"); 
     } else { 
      return null; 
     } 

     return mediaFile; 
    } 
}

來源

2014-11-24 06:54:43

如何在android中使用攝像頭捕捉圖像和視頻？

回答

相關問題