Android：使用固定宽高比的相机拍摄后拍摄图像

4 回答

• -3

  在做了一些阅读之后，我意识到它不能这么简单地完成 . 我的修改后的联系人来源是http://github.com/Wysie，您可以查看我为了让它正常工作所做的事情：

  private void doTakePhotoAction() {
      // http://2009.hfoss.org/Tutorial:Camera_and_Gallery_Demo
      // http://stackoverflow.com/questions/1050297/how-to-get-the-url-of-the-captured-image
      // http://www.damonkohler.com/2009/02/android-recipes.html
      // http://www.firstclown.us/tag/android/
      // The one I used to get everything working: http://groups.google.com/group/android-developers/msg/2ab62c12ee99ba30 
  
      Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
  
      //Wysie_Soh: Create path for temp file
      mImageCaptureUri = Uri.fromFile(new File(Environment.getExternalStorageDirectory(),
                          "tmp_contact_" + String.valueOf(System.currentTimeMillis()) + ".jpg"));
  
      intent.putExtra(android.provider.MediaStore.EXTRA_OUTPUT, mImageCaptureUri);
  
      try {
          intent.putExtra("return-data", true);
          startActivityForResult(intent, PICK_FROM_CAMERA);
      } catch (ActivityNotFoundException e) {
          //Do nothing for now
      }
  }
  
  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
      if (resultCode != RESULT_OK) {
          return;
      }
  
      switch (requestCode) {
  
      case CROP_FROM_CAMERA: {
          //Wysie_Soh: After a picture is taken, it will go to PICK_FROM_CAMERA, which will then come here
          //after the image is cropped.
  
          final Bundle extras = data.getExtras();
  
          if (extras != null) {
              Bitmap photo = extras.getParcelable("data");
  
              mPhoto = photo;
              mPhotoChanged = true;
              mPhotoImageView.setImageBitmap(photo);
              setPhotoPresent(true);
          }
  
          //Wysie_Soh: Delete the temporary file                        
          File f = new File(mImageCaptureUri.getPath());            
          if (f.exists()) {
              f.delete();
          }
  
          InputMethodManager mgr = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
          mgr.showSoftInput(mPhotoImageView, InputMethodManager.SHOW_IMPLICIT);
  
          break;
      }
  
      case PICK_FROM_CAMERA: {
          //Wysie_Soh: After an image is taken and saved to the location of mImageCaptureUri, come here
          //and load the crop editor, with the necessary parameters (96x96, 1:1 ratio)
  
          Intent intent = new Intent("com.android.camera.action.CROP");
          intent.setClassName("com.android.camera", "com.android.camera.CropImage");
  
          intent.setData(mImageCaptureUri);
          intent.putExtra("outputX", 96);
          intent.putExtra("outputY", 96);
          intent.putExtra("aspectX", 1);
          intent.putExtra("aspectY", 1);
          intent.putExtra("scale", true);
          intent.putExtra("return-data", true);            
          startActivityForResult(intent, CROP_FROM_CAMERA);
  
          break;
  
      }
      }
  }
  

  希望能帮助到你 ：）

  回复于 2024-05-03T09:52:59+08:00
• 2

  看看这篇文章 . 我在我的机器人1.5（Htc Magic）上测试了它并且工作得很好 .

  Android Works

  回复于 2024-05-03T09:52:59+08:00
• 22

  你试过这个 Intent （但保留你已经拥有的crop / aspect / output / return-data extras）？

  Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
  intent.setType("image/*");
  

  这基本上就是Android contacts application所做的，所以也许它不太适合你的用例（即立即拍照，而不是选择从画廊中选择一张或拍摄新照片） .

  无论如何值得一试！ :)

  回复于 2024-05-03T09:52:59+08:00
• 3

  虽然这可能是一个非常老的线程，但我能够使用以下代码以编程方式裁剪图片：

  btnTakePicture.setOnClickListener(new OnClickListener() {
  
          @Override
          public void onClick(View v) {
              // TODO Auto-generated method stub
              Intent cameraIntent = new Intent(
                      android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
  
              startActivityForResult(cameraIntent, CAMERA_REQUEST);
          }
      });
  

  然后我裁剪它：

  protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  
      if (requestCode == CAMERA_REQUEST && resultCode == RESULT_OK) {
  
          photo = (Bitmap) data.getExtras().get("data");
  
          performcrop();
      }
  
  }
  
  private void performcrop() {
      DisplayMetrics displayMetrics = this.getResources().getDisplayMetrics();
      int width = displayMetrics.widthPixels;
      int height = displayMetrics.heightPixels;
  
      Bitmap croppedBmp = Bitmap.createBitmap(photo, 0, 0, width / 2,
              photo.getHeight());
  
      imageTaken.setImageBitmap(croppedBmp);
  }
  

  imageTaken是我视图中的ImageView组件 . 你可以看到我的来源Here

  回复于 2024-05-03T09:52:59+08:00