android - 如何直接将Image传入ArthurHub/Android-Image-Cropper进行裁剪

Question

我正在为我的 UI、 Activity 结果契约(Contract)和 ArthutHub Android Image Cropper Library 使用 Jetpack compose在我的应用程序中裁剪图像。使用以下代码一切正常:

val (result, launcher) = setUpContentPhotoCropImageIntent()//this activity result 
//contracts in launched on a button press
result.value?.let {
    //code here to save the image and show it in the UI, upload to cloud storage etc.
}

@Composable
fun setUpContentPhotoCropImageIntent(): Pair<MutableState<Uri?>, 
ManagedActivityResultLauncher<Any?, Uri?>> {

val cropActivityResultContract = object : ActivityResultContract<Any?, Uri?>() {

    override fun createIntent(context: Context, input: Any?): Intent {
        CropImage.isExplicitCameraPermissionRequired(context)
        CropImage.getPickImageChooserIntent(context)
        return CropImage
            .activity()
            .setActivityTitle("Choose Photo")
            .setCropMenuCropButtonTitle("Select")
            .setAllowRotation(true)
            .setGuidelines(CropImageView.Guidelines.ON_TOUCH)
            .setCropShape(CropImageView.CropShape.RECTANGLE)
            .setAllowFlipping(true)
            .setOutputCompressQuality(100)
            .setFixAspectRatio(true)
            .setMaxCropResultSize(
                2000,
                2000
            )
            .getIntent(context)
    }

    override fun parseResult(resultCode: Int, intent: Intent?): Uri? {
        return CropImage.getActivityResult(intent)?.uri
    }

}

    val result = remember { mutableStateOf<Uri?>(null) }
    val launcher = rememberLauncherForActivityResult(cropActivityResultContract) {
        result.value = it
    }

    return Pair(result, launcher)

}

因此，通过这种方法，库不仅可以裁剪图像，还可以通过相机/画廊捕捉图像。我想自己传递一个位图图像(通过使用内置的 Android API 获取图像到 Take Picture 和 get Gallery Image )并使用这个库来裁剪，这样我就可以有 2 个专用按钮供用户使用拍摄照片或从图库中选择。

我现在有了图像，我希望这个库为我裁剪它，如何将图像传递给它？

Answer 1

尽量使用最新的库https://github.com/CanHub/Android-Image-Cropper

你可以像这样传递图像:

class MainActivity {
   private val cropImage = registerForActivityResult(CropImageContract()) { result ->
           if (result.isSuccessful) {
               // use the returned uri
               val uriContent = result.uriContent 
               val uriFilePath = result.getUriFilePath(context) // optional usage
           } else {
               // an error occurred
               val exception = result.error
           }
       }

   private fun startCrop() {
       // start cropping activity for pre-acquired image saved on the device and customize settings
       cropImage.launch(
           options(uri = imageUri) {
               setGuidelines(Guidelines.ON)
               setOutputCompressFormat(CompressFormat.PNG)
           }
       )
   }
}