Question

此代码从图库中获取几张图像，并将其设置在Viewpager中。
通过在“ getimagefilepath”方法中访问适配器来添加图像
在ImageViewPager类中，我使用Glide设置了ImageView。
我想在ImageViewPager类中创建一个ImageButton，并在单击该按钮时删除该图像。
实现是在之前完成的，但是当我在删除后再次添加它时，则添加了前一个图像。

public class ImageViewPagerAdapter extends FragmentPagerAdapter {

public ArrayList<Fragment> fragments = new ArrayList<>();

public ImageViewPagerAdapter(FragmentManager fm) {
    super(fm);
}

@Override
public Fragment getItem(int position) {
    return fragments.get(position);
}

public void removeitem(int position){
    fragments.remove(position);
}
@Override
public int getCount() {
    return fragments.size();
}
// List에 Fragment를 담을 함수
public void addItem(Fragment fragment) {
    fragments.add(fragment);
}

}

public class ImageViewPager extends Fragment {
ImageButton imageButton;
@Nullable
@Override
public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_image, container, false);

    ImageView imageView = view.findViewById(R.id.imageView);
    RequestOptions requestOptions = new RequestOptions();
    requestOptions.placeholder(R.drawable.btn_x);
    requestOptions.error(R.drawable.account);
    requestOptions.diskCacheStrategy(DiskCacheStrategy.NONE);
    requestOptions.skipMemoryCache(true);
    requestOptions.override(1200,1000);
    if (getArguments() != null) {
        Bundle args = getArguments();
        // MainActivity에서 받아온 Resource를 ImageView에 셋팅
        Glide.with(getActivity()).load("file://" + Uri.parse(args.getString("imgRes"))).thumbnail(0.1f).apply(requestOptions).into(imageView);
        //imageView.setImageURI(Uri.parse(args.getString("imgRes")));
        //imageView.setImageResource(args.getInt("imgRes"));
    }
    imageButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
              //I want to write code to remove it here.
        }
    });

    return view;
}

}

public void doTakeMultiAlbumAction(){
    Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
    intent.setType("image/*");
    intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
    intent.setAction(Intent.ACTION_GET_CONTENT);
    startActivityForResult(Intent.createChooser(intent,"Select Picture"), PICK_IMAGE_MULTIPLE);
}

@RequiresApi(api = Build.VERSION_CODES.JELLY_BEAN)
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
    if (requestCode == PICK_IMAGE_MULTIPLE && resultCode == RESULT_OK  && data != null){

        Log.i("하@","1"+imagePathList+"2"+fragmentAdapter+"3"+viewPager);


        if(data.getClipData() != null){
            ClipData mClipData = data.getClipData();
            mArrayUri = new ArrayList<Uri>();
            for (int i=0; i<mClipData.getItemCount(); i++){
                Uri imageUri = data.getClipData().getItemAt(i).getUri();
                //getImageUri(imageUri);
                getImageFilePath(imageUri);//2. 절대경로 구함 쓸데가 있겠지?
            }
        }
        else if(data.getData() != null){
            Uri imgUri = data.getData();
            getImageFilePath(imgUri);
        }
    }
    super.onActivityResult(requestCode, resultCode, data);

}


public void getImageFilePath(Uri uri) {

    File file = new File(uri.getPath());
    String[] filePath = file.getPath().split(":");
    String image_id = filePath[filePath.length - 1];

    Cursor cursor = getContentResolver().query(android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI, null, MediaStore.Images.Media._ID + " = ? ", new String[]{image_id}, null);
    if (cursor!=null) {
        cursor.moveToFirst();
        imagePath = cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA));
        imagePathList.add(imagePath);
        cursor.close();

        viewPager = (ViewPager) findViewById(R.id.image_viewpager);
        fragmentAdapter = new ImageViewPagerAdapter(getSupportFragmentManager());
        // ViewPager와  FragmentAdapter 연결
        viewPager.setAdapter(fragmentAdapter);

        viewPager.setClipToPadding(false);
        int dpValue = 16;
        float d = getResources().getDisplayMetrics().density;
        int margin = (int) (dpValue * d);
        viewPager.setPadding(margin, 0, margin, 0);
        viewPager.setPageMargin(margin / 2);

        Log.i("image 가져옴",""+imagePathList);
        // FragmentAdapter에 Fragment 추가, Image 개수만큼 추가
        for (int i = 0; i < imagePathList.size(); i++) {
            ImageViewPager imageFragment = new ImageViewPager();
            Bundle bundle = new Bundle();
            bundle.putString("imgRes", imagePathList.get(i));
            imageFragment.setArguments(bundle);
            fragmentAdapter.addItem(imageFragment);
        }
        fragmentAdapter.notifyDataSetChanged();
    }
    getItemposition(viewPager);

}

如何使用“ FragmentPagerAdapter”从“ Viewpager”中删除项目？

0 个答案: