我想从android中的gridview获取所选图像的路径？我在这个gridview中使用了回收器

Question

我正在开发一个应用程序，其中一次可以将选定的图像上传到服务器...为此我需要获取数组中所有选定图像的路径，然后必须将此数组传递给上传活动...以便所有图片可以自动逐个上传到服务器....

这是我的适配器类

包com.akshay.nmiua;

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.util.SparseBooleanArray;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;

import com.bumptech.glide.Glide ;
import com.technotalkative.multiphotoselect.R;

import java.util.ArrayList;

public class ImageAdapter extends RecyclerView.Adapter<ImageAdapter.MyViewHolder> {

    private ArrayList<String> mImagesList;
    private Context mContext;
    private SparseBooleanArray mSparseBooleanArray;

    public ImageAdapter(Context context, ArrayList<String> imageList) {
        mContext = context;
        mSparseBooleanArray = new SparseBooleanArray();
        mImagesList = new ArrayList<String>();
        this.mImagesList = imageList;
    }

    public ArrayList<String> getCheckedItems() {
        ArrayList<String> mTempArry = new ArrayList<String>();

        for(int i=0;i<mImagesList.size();i++) {
            if(mSparseBooleanArray.get(i)) {
                mTempArry.add(mImagesList.get(i));
            }
        }
        return mTempArry;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    CompoundButton.OnCheckedChangeListener mCheckedChangeListener = new CompoundButton.OnCheckedChangeListener() {

        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            mSparseBooleanArray.put((Integer) buttonView.getTag(), isChecked);
        }
    };

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

        View itemView = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.row_multiphoto_item, parent, false);

        return new MyViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {

        String imageUrl = mImagesList.get(position);

        Glide.with(mContext)
                .load("file://"+imageUrl)
                .centerCrop()
                .placeholder(R.drawable.ic_launcher)
                .error(R.drawable.ic_launcher)
                .into(holder.imageView);

        holder.checkBox.setTag(position);
        holder.checkBox.setChecked(mSparseBooleanArray.get(position));
        holder.checkBox.setOnCheckedChangeListener(mCheckedChangeListener);


    }

    @Override
    public int getItemCount() {
        return mImagesList.size();
    }

    public class MyViewHolder extends RecyclerView.ViewHolder {

        public CheckBox checkBox;
        public ImageView imageView;

        public MyViewHolder(View view) {
            super(view);

            checkBox = (CheckBox) view.findViewById(R.id.checkBox1);
            imageView = (ImageView) view.findViewById(R.id.imageView1);
        }
    }

}

这是我的itemoffset类..

package com.akshay.nmiua;

import android.content.Context;
import android.graphics.Rect;
import android.support.annotation.DimenRes;
import android.support.annotation.NonNull;
import android.support.v7.widget.RecyclerView;
import android.view.View;


public class ItemOffsetDecoration extends RecyclerView.ItemDecoration {

    private int mItemOffset;

    public ItemOffsetDecoration(int itemOffset) {
        mItemOffset = itemOffset;
    }

    public ItemOffsetDecoration(@NonNull Context context, @DimenRes int itemOffsetId) {
        this(context.getResources().getDimensionPixelSize(itemOffsetId));
    }

    @Override
    public void getItemOffsets(Rect outRect, View view, RecyclerView parent,
                               RecyclerView.State state) {
        super.getItemOffsets(outRect, view, parent, state);
        outRect.set(mItemOffset, mItemOffset, mItemOffset, mItemOffset);
    }
}

这是我的主要活动..

package com.akshay.nmiua;

import android.content.pm.PackageManager;
import android.database.Cursor;
import android.os.Build;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.design.widget.Snackbar;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.GridLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

import com.technotalkative.multiphotoselect.R;

import java.util.ArrayList;

import static android.Manifest.permission.READ_EXTERNAL_STORAGE;


public class MultiPhotoSelectActivity extends AppCompatActivity {

    private ImageAdapter imageAdapter;
    private static final int REQUEST_FOR_STORAGE_PERMISSION = 123;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.layout_multi_photo_select);
        populateImagesFromGallery();
    }

    public void btnChoosePhotosClick(View v){

        ArrayList<String> selectedItems = imageAdapter.getCheckedItems();

        if (selectedItems!= null && selectedItems.size() > 0) {
            Toast.makeText(MultiPhotoSelectActivity.this, "Total photos selected: " + selectedItems.size(),
                    Toast.LENGTH_SHORT).show();
            Log.d(MultiPhotoSelectActivity.class.getSimpleName(), "Selected Items: " + selectedItems.toString());
        }
    }

    private void populateImagesFromGallery() {
        if (!mayRequestGalleryImages()) {
            return;
        }

        ArrayList<String> imageUrls = loadPhotosFromNativeGallery();
        initializeRecyclerView(imageUrls);
    }

    private boolean mayRequestGalleryImages() {

        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) {
            return true;
        }

        if (checkSelfPermission(READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
            return true;
        }

        if (shouldShowRequestPermissionRationale(READ_EXTERNAL_STORAGE)) {
            showPermissionRationaleSnackBar();
        } else {
            requestPermissions(new String[]{READ_EXTERNAL_STORAGE}, REQUEST_FOR_STORAGE_PERMISSION);
        }

        return false;
    }
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
                                           @NonNull int[] grantResults) {

        switch (requestCode) {

            case REQUEST_FOR_STORAGE_PERMISSION: {

                if (grantResults.length > 0) {
                    if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                        populateImagesFromGallery();
                    } else {
                        if (ActivityCompat.shouldShowRequestPermissionRationale(this, READ_EXTERNAL_STORAGE)) {
                            showPermissionRationaleSnackBar();
                        } else {
                            Toast.makeText(this, "Go to settings and enable permission", Toast.LENGTH_LONG).show();
                        }
                    }
                }
                break;
            }
        }
    }

    private ArrayList<String> loadPhotosFromNativeGallery() {
        final String[] columns = { MediaStore.Images.Media.DATA, MediaStore.Images.Media._ID };
        final String orderBy = MediaStore.Images.Media.DATE_TAKEN;
        Cursor imagecursor = managedQuery(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI, columns, null,
                null, orderBy + " DESC");

        ArrayList<String> imageUrls = new ArrayList<String>();

        for (int i = 0; i < imagecursor.getCount(); i++) {
            imagecursor.moveToPosition(i);
            int dataColumnIndex = imagecursor.getColumnIndex(MediaStore.Images.Media.DATA);
            imageUrls.add(imagecursor.getString(dataColumnIndex));

            System.out.println("=====> Array path => "+imageUrls.get(i));
        }

        return imageUrls;
    }

    private void initializeRecyclerView(ArrayList<String> imageUrls) {
        imageAdapter = new ImageAdapter(this, imageUrls);

        RecyclerView.LayoutManager layoutManager = new GridLayoutManager(getApplicationContext(),4);
        RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);
        recyclerView.setLayoutManager(layoutManager);
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.addItemDecoration(new ItemOffsetDecoration(this, R.dimen.item_offset));
        recyclerView.setAdapter(imageAdapter);
    }

    private void showPermissionRationaleSnackBar() {
        Snackbar.make(findViewById(R.id.button1), getString(R.string.permission_rationale),
                Snackbar.LENGTH_INDEFINITE).setAction("OK", new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                ActivityCompat.requestPermissions(MultiPhotoSelectActivity.this,
                        new String[]{READ_EXTERNAL_STORAGE},
                        REQUEST_FOR_STORAGE_PERMISSION);
            }
        }).show();

    }
}