下载后从谷歌照片库中检索图像

Question

我发布了从画廊获取照片的意图,当我在我的画廊中使用nexus谷歌照片应用程序一切正常.

但如果图片不在手机上(在Google相片在线服务上),它会为我下载.选择图像后,我将图像发送到另一个活动进行裁剪,但在下载的情况下,发送到裁剪活动的图像为空,因为下载尚未完成.

如何知道下载完成后将图像发送到裁剪活动？

这是我的代码:

private void pickFromGallery()
{
    Intent galleryIntent = new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
    startActivityForResult(galleryIntent, RESULT_LOAD_IMG);
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
    try {
        // When an Image is picked
        if (requestCode == RESULT_LOAD_IMG && resultCode == Activity.RESULT_OK
                && null != data) {
            // Get the Image from data

            Uri selectedImage = data.getData();
            String[] filePathColumn = {MediaStore.Images.Media.DATA};

            // Get the cursor
            Cursor cursor = getApplicationContext().getContentResolver().query(selectedImage,
                    filePathColumn, null, null, null);
            // Move to first row
            assert cursor != null;
            cursor.moveToFirst();

            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
            imgDecodableString = cursor.getString(columnIndex);
            cursor.close();
            startCrop(imgDecodableString);
        }
    } catch (Exception e) {
        Toast.makeText(this, "Something went wrong", Toast.LENGTH_LONG)
                .show();
    }
    }

任何帮助,将不胜感激.

Answer 1

我认为从谷歌照片下载所选图像时无法裁剪图像.您只能裁剪本地存储图像

但是,为了检查所选图像是否可下载或从本地存储中检查,您可以在onActivityResult()方法中执行此操作.

@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
        // TODO Auto-generated method stub
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == RESULT_LOAD_IMG && resultCode == Activity.RESULT_OK
                && null != data) {

                Uri selectedImageUri = data.getData();
                String tempPath = getPath(selectedImageUri, getActivity());
                String url = data.getData().toString();
                if (url.startsWith("content://com.google.android.apps.photos.content")){
                    try {
                        InputStream is = getActivity().getContentResolver().openInputStream(selectedImageUri);
                        if (is != null) {
                            Bitmap pictureBitmap = BitmapFactory.decodeStream(is);
                            //You can use this bitmap according to your purpose or Set bitmap to imageview
                        }
                    } catch (FileNotFoundException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }else {
                     startCrop(tempPath);

             }
         }

}

这是getPath()用于的方法onActivityResult().

public String getPath(Uri uri, Activity activity) {
    Cursor cursor = null;
    try {
        String[] projection = {MediaStore.MediaColumns.DATA};
        cursor = activity.getContentResolver().query(uri, projection, null, null, null);
        if (cursor.moveToFirst()) {
            int column_index = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA);
            return cursor.getString(column_index);
        }
    } catch (Exception e) {
    } finally {
        cursor.close();
    }
    return "";
}

我希望它对你有所帮助.