java - 在 RecyclerView 中从外部存储图像文件夹获取图像？

Question

我的外部存储中有一个文件夹，我的文件夹名称是(Whatsapp Sticker)。当我这样做时，我想访问此文件夹中的所有图像..一张图像返回到文件夹大小的长度..如何获取所有图像？

这是我获取所有图像的 Activity :

public class CupyActivity extends AppCompatActivity {
    RecyclerView recyclerView;
    recyclerAdapterCupy recyclerAdapterCupy;
    GridLayoutManager layoutManager;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_cupy);
        recyclerView = findViewById(R.id.recycler1);
        recyclerAdapterCupy = new recyclerAdapterCupy(CupyActivity.this, getData());
        recyclerView.setAdapter(recyclerAdapterCupy);
        layoutManager = new GridLayoutManager(this, 2);
        recyclerView.setLayoutManager(layoutManager);


    }

    private ArrayList<GetCupy> getData()   // this Method return one image again and Again... in my folder 26 images but 1 image return 26times
        {
            ArrayList<GetCupy> arrayList = new ArrayList<>();
           File downloadfile = Environment.getExternalStorageDirectory();
           File file = new File(downloadfile + "/Whatsapp Sticker");
            GetCupy getCupy = new GetCupy();
            if (file.exists())
            {
                File[] files = file.listFiles();

                for (int i = 0; i<files.length; i++)
                {
                    File file1 = files[i];

                    getCupy.setName(file1.getName());
                    getCupy.setUri(Uri.fromFile(file1));
                    Log.d("abcdf", "getData: "+Uri.fromFile(file1));

                    arrayList.add(getCupy);
                    Log.d("abc", "getData: "+arrayList);
                }
            }
            return arrayList;
        }
}

Answer 1

在 for 循环内创建一个 Cupy 数据对象..

 private ArrayList<GetCupy> getData()  
        {
            ArrayList<GetCupy> arrayList = new ArrayList<>();

           File file = new File(Environment.getExternalStorageDirectory() + "/Whatsapp Sticker");

            if (file.exists())
            {
                File[] files = file.listFiles();

                for (int i = 0; i<files.length; i++)
                {
                    getCupy = new GetCupy();
                    File file1 = files[i];

                    getCupy.setName(file1.getName());
                    getCupy.setUri(Uri.fromFile(file1));
                    Log.d("abcdf", "getData: "+Uri.fromFile(file1));

                    arrayList.add(getCupy);
                    Log.d("abc", "getData: "+arrayList);
                }
            }
            return arrayList;

        }