Question

我正在使用this cropper库。我想从下面的代码块知道，如何在字符串中获得裁剪图像路径的结果？

        Intent intent = new Intent(this, CropImage.class);
        intent.putExtra(CropImage.IMAGE_PATH, imageFilePath);
        intent.putExtra(CropImage.SCALE, true);

        intent.putExtra("outputX", 200); //Set this to define the max size of the output bitmap
        intent.putExtra("outputY", 150); //Set this to define the max size of the output bitmap
        intent.putExtra(CropImage.ASPECT_X, 0);
        intent.putExtra(CropImage.ASPECT_Y, 0);
        startActivity(intent);

Answer 1

首先，您需要使用startActivity更改startActivityForResult。

如果您已完成此操作，请在您的活动中覆盖onActivityResult，然后执行

String path = data.getStringExtra(CropImage.IMAGE_PATH);

其中data是来自onActivityResult(int requestCode, int resultCode, Intent data)

的Intent对象

Answer 2

根据the libraries github page上的文档，您应该使用startActivityForResult代替startActivity。

通过调用startActivityForResult，Activity完成后，onActivityResult将被调用，然后您可以将结果拉出来。

以下代码来自此库的README.md：

开始活动：

private void runCropImage() {
    // create explicit intent
    Intent intent = new Intent(this, CropImage.class);

    // tell CropImage activity to look for image to crop 
    String filePath = ...;
    intent.putExtra(CropImage.IMAGE_PATH, filePath);

    // allow CropImage activity to rescale image
    intent.putExtra(CropImage.SCALE, true);

    // if the aspect ratio is fixed to ratio 3/2
    intent.putExtra(CropImage.ASPECT_X, 3);
    intent.putExtra(CropImage.ASPECT_Y, 2);

    // start activity CropImage with certain request code and listen
    // for result
    startActivityForResult(intent, REQUEST_CODE_CROP_IMAGE);
}

等待结果：

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {

    if (resultCode != RESULT_OK) {

        return;
    }  

    switch (requestCode) {

        case REQUEST_CODE_CROP_IMAGE:

            String path = data.getStringExtra(CropImage.IMAGE_PATH);

            // if nothing received
            if (path == null) {

                return;
            }

            // cropped bitmap
            Bitmap bitmap = BitmapFactory.decodeFile(mFileTemp.getPath());

            break;
    }
    super.onActivityResult(requestCode, resultCode, data);
}

如何通过其他活动的意图获得结果

2 个答案: