在Android 10中，您可以使用MediaStore API来获取所有图片。以下是一个示例代码，演示如何获取所有图片的URI和文件路径：

import android.content.ContentResolver;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Log;

import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";

    @RequiresApi(api = Build.VERSION_CODES.Q)
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 获取所有图片的URI和文件路径
        List imageUris = getAllImages();
        for (Uri uri : imageUris) {
            Log.d(TAG, "Image URI: " + uri.toString());
            Log.d(TAG, "Image Path: " + uriToFilePath(uri));
        }
    }

    @RequiresApi(api = Build.VERSION_CODES.Q)
    private List getAllImages() {
        List imageUris = new ArrayList<>();

        // 查询条件
        String selection = MediaStore.Images.Media.MIME_TYPE + " = ?";

        // 查询参数
        String[] selectionArgs = new String[]{"image/jpeg"};

        // 查询所有图片
        try (Cursor cursor = getContentResolver().query(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI,
                null,
                selection,
                selectionArgs,
                null
        )) {
            if (cursor != null) {
                int uriColumn = cursor.getColumnIndex(MediaStore.Images.Media._ID);
                while (cursor.moveToNext()) {
                    long imageId = cursor.getLong(uriColumn);
                    Uri contentUri = Uri.withAppendedPath(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, "" + imageId);
                    imageUris.add(contentUri);
                }
            }
        } catch (Exception e) {
            Log.e(TAG, "Error retrieving images: " + e.getMessage(), e);
        }

        return imageUris;
    }

    private String uriToFilePath(Uri uri) {
        String filePath = null;
        if (uri != null) {
            if (ContentResolver.SCHEME_CONTENT.equals(uri.getScheme())) {
                try (Cursor cursor = getContentResolver().query(uri, null, null, null, null)) {
                    if (cursor != null && cursor.moveToFirst()) {
                        int columnIndex = cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
                        filePath = cursor.getString(columnIndex);
                    }
                }
            } else if (ContentResolver.SCHEME_FILE.equals(uri.getScheme())) {
                filePath = uri.getPath();
            }
        }
        return filePath;
    }
}

注意，在Android 10中，由于存储权限的变更，您需要在Manifest文件中添加以下权限声明：