Android 图像裁剪:输出 x 和输出 y

Android Image Crop: Output x and Output y

我已经实现了具有特定输出大小的图像裁剪意图。但是在代码中对尺寸所做的更改不会对图像产生任何影响,并且每次更改的输出都保持不变。

 private void performCrop(String picUri) {
    try {
        //Start Crop Activity

        Intent cropIntent = new Intent("com.android.camera.action.CROP");
        // indicate image type and Uri
        File f = new File(picUri);
        Uri contentUri = Uri.fromFile(f);

        cropIntent.setDataAndType(contentUri, "image/*");
        // set crop properties
        cropIntent.putExtra("crop", "true");
        // indicate aspect of desired crop
        cropIntent.putExtra("aspectX", 1);
        cropIntent.putExtra("aspectY", 1);
        // indicate output X and Y
        cropIntent.putExtra("outputX", 400);
        cropIntent.putExtra("outputY", 400);

        // retrieve data on return
        cropIntent.putExtra("return-data", true);
        // start the activity - we handle returning in onActivityResult
        startActivityForResult(cropIntent, RESULT_CROP);
    }
    // respond to users whose devices do not support the crop action
    catch (ActivityNotFoundException anfe) {
        // display an error message
        String errorMessage = "your device doesn't support the crop action!";
        Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
        toast.show();
    }
}

输出 x 和 y 值的变化不会影响被裁剪的图像大小。图像大小始终保持 160*160。只是当我改变纵横比时,图像尺寸会发生一点变化。但是我需要为 x 和 y

提供一个特定的大小

如果有任何关于图像裁剪的库并且在所有设备上都支持,那就太棒了

设置 aspectX 和 aspectY 与 outputX 和 outputY 的比率。

假设您希望结果图像为 200 * 300 像素。然后,只需将 aspectX 设置为 2,将 aspectY 设置为 3。您将获得所需的图像尺寸。这是更新后的代码。

 private void performCrop(String picUri) {
    try {
        //Start Crop Activity

        Intent cropIntent = new Intent("com.android.camera.action.CROP");
        // indicate image type and Uri
        File f = new File(picUri);
        Uri contentUri = Uri.fromFile(f);

        cropIntent.setDataAndType(contentUri, "image/*");
        // set crop properties
        cropIntent.putExtra("crop", "true");
        // indicate aspect of desired crop
        cropIntent.putExtra("aspectX", 2);
        cropIntent.putExtra("aspectY", 3);
        // indicate output X and Y
        cropIntent.putExtra("outputX", 200);
        cropIntent.putExtra("outputY", 300);

        // retrieve data on return
        cropIntent.putExtra("return-data", true);
        // start the activity - we handle returning in onActivityResult
        startActivityForResult(cropIntent, RESULT_CROP);
    }
    // respond to users whose devices do not support the crop action
    catch (ActivityNotFoundException anfe) {
        // display an error message
        String errorMessage = "your device doesn't support the crop action!";
        Toast toast = Toast.makeText(this, errorMessage, Toast.LENGTH_SHORT);
        toast.show();
    }
    }