我用这种方法保存了2年的图像，没有我改变任何东西，这不再适用于我了。新版本似乎删除了这个方法，将我的android studio应用程序中的图像保存到手机的多媒体资料中。现在，画廊里什么都没有。我使用api 29，得到以下错误：

W/System.err: java.io.FileNotFoundException: /storage/emulated/0/MyAppName/coolimage.jpg: open failed: ENOENT (No such file or directory)

这是我的密码：

package com.xxx.xxxxx;

import android.content.ContentValues;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.MediaScannerConnection;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.xxx.xxxxx.R;

import java.io.File;
import java.io.FileOutputStream;
import java.util.Random;

/**
 * A simple {@link Fragment} subclass.
 */
public class view_skin_fragment extends Fragment {

    final int[] imageId = {
            R.drawable.s1coolimage

    };

    final int[] dowloadimageId = {
            R.drawable.d1coolimage
    };

    final String[] skinNames = {
            "My image name"} ;

    final String[] skinDescription ={
            "Image description",

    };

    SQLiteDatabase db;
    private int imageindedx;
    private static final int START_LEVEL = 1;
    private int mLevel;
    private Button mNextLevelButton;
    private TextView mLevelTextView;

    public view_skin_fragment() {
        // Required empty public constructor
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        View rootView= inflater.inflate(R.layout.fragment_view_skin, container, false);

        Button share=(Button) rootView.findViewById(R.id.share_vs);
        share.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Intent sharingIntent = new Intent(Intent.ACTION_SEND);
                sharingIntent.setType("text/plain");
                sharingIntent.putExtra(Intent.EXTRA_TEXT, "Image collection title");
                startActivity(Intent.createChooser(sharingIntent, "Share"));
            }
        });

        imageindedx=getArguments().getInt("imageIndex");
        ImageView img= (ImageView) rootView.findViewById(R.id.imageView);
        TextView skinName=(TextView) rootView.findViewById(R.id.skinname);
        Button back = (Button) rootView.findViewById(R.id.back);
        Button download = (Button) rootView.findViewById(R.id.download);
        skinName.setText(skinNames[imageindedx]);
        img.setImageResource(imageId[imageindedx]);

        TextView SkinDescription =(TextView) rootView.findViewById(R.id.description);
        SkinDescription.setText(skinDescription[imageindedx]);

        back.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                FragmentManager fragmentManager = getFragmentManager();
                fragmentManager.beginTransaction().replace(R.id.frame, new grid_layout()).commit();
            }
        });

        download.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                //Drawable drawable = getActivity().getDrawable(dowloadimageId[imageindedx]);

                // Get the bitmap from drawable object
               // Bitmap bitmap = ((BitmapDrawable)drawable).getBitmap();

                Bitmap bitmap = BitmapFactory.decodeResource(getResources(),dowloadimageId[imageindedx] );

                String root = Environment.getExternalStorageDirectory().toString();
                File myDir = new File(root + "/MyAppName");
                if (!myDir.exists()) {
                    myDir.mkdirs();
                }
                Random generator = new Random();
                int n = 10000;
                n = generator.nextInt(n);
                String fname = skinNames[imageindedx] + n + ".jpg";
                File file = new File(myDir, fname);
                Log.i("Fileee", "" + file);
                if (file.exists())
                    file.delete();
                try {
                    FileOutputStream out = new FileOutputStream(file);
                    bitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
                    out.flush();
                    out.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }

                Log.e("path",file.getPath());

                MediaScannerConnection.scanFile(getActivity(),
                        new String[] { file.getPath() }, null,
                        new MediaScannerConnection.OnScanCompletedListener() {
                            public void onScanCompleted(String path, Uri uri) {
                                //now visible in gallery
                            }
                        }
                );

                Toast.makeText(getActivity(),getString(R.string.saved_to_gallery),Toast.LENGTH_SHORT).show();

            }
        });

        Button fav = (Button) rootView.findViewById(R.id.fav);
        fav.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                insert();
            }
        });
        return rootView;
    }

    int id=0;
    public void insert(){
        id++;
        db = new MySQLiteOpenHelper(getActivity()).getWritableDatabase();
        ContentValues values = new ContentValues();
      //  values.put(SQLDemoContract.tables.StudentEntry._ID, "One"+String.valueOf(id));
        values.put(SQLDemoContract.tables.StudentEntry.COLUMN_NAME_IMAGE_INDEX, imageindedx );
        db.insert(SQLDemoContract.tables.StudentEntry.TABLE_NAME, null, values);
        db.close();

        Toast.makeText(getActivity(),getString(R.string.added_to_favorites),Toast.LENGTH_SHORT).show();

    }

}