从android中的库中选择时裁剪图像

Question

I want to crop an image in my application when it is selected from gallery. ie if I launch the gallery and select an image the cropping window should come like when we select an image from iPhone. Is it possible in Android.

I found one tutorial for cropping the image in android, but dont seem the way I wanted.

http://www.coderzheaven.com/2011/03/15/crop-an-image-in-android/

Answer 1

Yes it's possible to crop image in android by using com.android.camera.action.CROP . after picking image url from gallery.you will start Crop Editor as:

Intent intent = new Intent("com.android.camera.action.CROP");  
intent.setClassName("com.android.camera", "com.android.camera.CropImage");  
File file = new File(filePath);  
Uri uri = Uri.fromFile(file);  
intent.setData(uri);  
intent.putExtra("crop", "true");  
intent.putExtra("aspectX", 1);  
intent.putExtra("aspectY", 1);  
intent.putExtra("outputX", 96);  
intent.putExtra("outputY", 96);  
intent.putExtra("noFaceDetection", true);  
intent.putExtra("return-data", true);                                  
startActivityForResult(intent, REQUEST_CROP_ICON);

When the picture select Activity return will be selected to save the contents.in onActivityResult :

Bundle extras = data.getExtras();  
if(extras != null ) {  
    Bitmap photo = extras.getParcelable("data");  
    ByteArrayOutputStream stream = new ByteArrayOutputStream();  
    photo.compress(Bitmap.CompressFormat.JPEG, 75, stream);  
        // The stream to write to a file or directly using the photo
}

and see this post which is also help you for cropping image in android

Answer 2

This tutorial is exactly what you need enjoy:

Picking image from gallery:

Crop image after Intent pick action

Cheers

Answer 3

Although part of the internal API, the com.android.camera.action.CROP seems like it is well-supported on most Android devices. This might get you started:

final Intent intent = new Intent("com.android.camera.action.CROP");
intent.setData(uriOfImageToCrop);
intent.putExtra("outputX", 400);
intent.putExtra("outputY", 400);
intent.putExtra("aspectX", 1);
intent.putExtra("aspectY", 1);
intent.putExtra("scale", true);
intent.putExtra("noFaceDetection", true);
intent.putExtra("output", Uri.fromFile(someOutputFile));
startActivityForResult(intent, SOME_RANDOM_REQUEST_CODE);

Then handle what you need to do in the onActivityResult() method of your Activity . Your output file should be the cropped image.

Since this Intent action is part of the internal API, however, I would strongly advise that you have some sort of fallback behavior if some device does not support the Intent . Some manufacturers provide their own Gallery apps and so there is no way of knowing whether or not the user's device will recognize the Intent . PLEASE DON'T FORGET THIS!! :)

Answer 4

You can already tell the Camera/Gallery-Intent to start the crop-editor after the image is selected/taken:

Pick Image from Gallery:

Intent pickImageIntent = new Intent(Intent.ACTION_PICK, android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);

pickImageIntent.setType("image/*");
pickImageIntent.putExtra("crop", "true");
pickImageIntent.putExtra("outputX", 200);
pickImageIntent.putExtra("outputY", 200);
pickImageIntent.putExtra("aspectX", 1);
pickImageIntent.putExtra("aspectY", 1);
pickImageIntent.putExtra("scale", true);
pickImageIntent.putExtra(MediaStore.EXTRA_OUTPUT, uriWhereToStore);
pickImageIntent.putExtra("outputFormat",

Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(pickImageIntent, RESULT_LOAD_IMAGE);

Take Photo:

Intent takePicIntent = new Intent("android.media.action.IMAGE_CAPTURE");

takePicIntent .putExtra("crop", "true");
takePicIntent .putExtra("outputX", 200);
takePicIntent .putExtra("outputY", 200);
takePicIntent .putExtra("aspectX", 1);
takePicIntent .putExtra("aspectY", 1);
takePicIntent .putExtra("scale", true);
takePicIntent .putExtra(MediaStore.EXTRA_OUTPUT, uriWhereToStore);
takePicIntent .putExtra("outputFormat",

Bitmap.CompressFormat.JPEG.toString());
startActivityForResult(takePicIntent , RESULT_LOAD_IMAGE);

Answer 5

I solved this problem this way

private void pickUserImage() { 

if (doHavePermission()) { 
    Intent photoPickerIntent = new Intent(Intent.ACTION_PICK,
            android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    photoPickerIntent.setType("image/*");
    photoPickerIntent.putExtra("crop", "true");
    photoPickerIntent.putExtra("scale", true);
    photoPickerIntent.putExtra("outputX", 256);
    photoPickerIntent.putExtra("outputY", 256);
    photoPickerIntent.putExtra("aspectX", 1);
    photoPickerIntent.putExtra("aspectY", 1);
    photoPickerIntent.putExtra("outputFormat", Bitmap.CompressFormat.JPEG.toString());
    photoPickerIntent.putExtra(MediaStore.EXTRA_OUTPUT, getTempUri());
    startActivityForResult(photoPickerIntent, PICK_FROM_GALLERY);
    } 
}

find my complete solution here in stackoverflow post

Answer 6

Nobody will tell you which extra is needed unless you try it:

   val intent = Intent(Intent.ACTION_PICK)
   intent.apply {
       type = "image/*"
       putExtra("crop", "true") // NOTE: should be string
       putExtra("outputX", 300) // This is needed, editor can't close without these two
       putExtra("outputY", 300) // This is needed

       putExtra("scale", true)
       putExtra("aspectX", 1)
       putExtra("aspectY", 1)
       putExtra("return-data", true)
   }
   startActivityForResult(intent, YOUR_INT_CODE)