How to delete Gridview image?

Question

I’m developing an app that contains a gallery, where the user takes photos and the image is shown on GridView, but I don’t know how to delete the selected image

I was able to do something like: the user presses the image and the icon of a delete but not delete recycle bin appears.

Follows my code:

import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Environment;
import android.provider.MediaStore;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.ActionMode;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.animation.Animation;
import android.view.animation.AnimationUtils;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Date;
import java.util.List;

public class GaleriaaSp extends AppCompatActivity {

    FloatingActionButton fab_plus,fab_twitterr,fab_fb;
    Animation FabOpen,FabClose,FabRClockwise,FabRantiClockwise;
    boolean isOpen=false;
    final int CAMERA_GALERIA =12;
    FloatingActionButton captureBtn = null;
    final int CAMERA_CAPTURE = 1;
    private Uri picUri;
    private DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    private GridView grid;
    private List <String> listOfImagesPath;
    private ArrayList <String> list;

     int count=0;

    public static final String GridViewDemo_ImagePath = Environment.getExternalStorageDirectory().getAbsolutePath() + "/GridViewDemo/";


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_galeriaa_sp);


        fab_plus =(FloatingActionButton)findViewById(R.id.fab_plus);
        fab_twitterr =(FloatingActionButton)findViewById(R.id.fab_camera);
        fab_fb =(FloatingActionButton)findViewById(R.id.fab_galeria);
        FabOpen = AnimationUtils.loadAnimation(getApplicationContext(), R.anim.fab_open);
        FabClose = AnimationUtils.loadAnimation(getApplicationContext(),R.anim.fab_close);
        FabRClockwise = AnimationUtils.loadAnimation(getApplicationContext(),R.anim.rotate_clockwise);
        FabRantiClockwise = AnimationUtils.loadAnimation(getApplicationContext(),R.anim.rotate_anticlockwise);

         grid = ( GridView) findViewById(R.id.GridView);

        listOfImagesPath = null;
        listOfImagesPath = RetriveCapturedImagePath();
        if(listOfImagesPath!=null){
        grid.setAdapter(new ImageListAdapter(this,listOfImagesPath));
        }


              //      CHAAMAR CAMERA twitterr
        fab_twitterr.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {


                 Intent captureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
                 startActivityForResult(captureIntent, CAMERA_CAPTURE);


                fab_fb.startAnimation(FabClose);
                fab_twitterr.startAnimation(FabClose);
                fab_plus.startAnimation(FabRantiClockwise);
                fab_twitterr.setClickable(false);
                fab_fb.setClickable(false);
                isOpen = false;
            }
        });



        //      CHAAMAR Galeria twitter

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


                Intent intent = new Intent();
               intent.setType("image/*");
                intent.setAction(Intent.ACTION_GET_CONTENT);
                startActivityForResult(Intent.createChooser(intent, "Selecione uma imagem"), CAMERA_GALERIA);

                fab_fb.startAnimation(FabClose);
                fab_twitterr.startAnimation(FabClose);
                fab_plus.startAnimation(FabRantiClockwise);
                fab_twitterr.setClickable(false);
                fab_fb.setClickable(false);
                isOpen = false;
            }
        });



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


                if (isOpen) {

                    fab_fb.startAnimation(FabClose);
                    fab_twitterr.startAnimation(FabClose);
                    fab_plus.startAnimation(FabRantiClockwise);
                    fab_twitterr.setClickable(false);
                    fab_fb.setClickable(false);
                    isOpen = false;

                } else {

                    fab_fb.startAnimation(FabOpen);
                    fab_twitterr.startAnimation(FabOpen);
                    fab_plus.startAnimation(FabRClockwise);
                    fab_twitterr.setClickable(true);
                    fab_fb.setClickable(true);
                    isOpen = true;


                }


            }
        });



        grid.setChoiceMode(GridView.CHOICE_MODE_MULTIPLE_MODAL);
        grid.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
            @Override
            public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {


                count = count + 1;
                mode.setTitle(count + " items selecionado");
            }

            @Override
            public boolean onCreateActionMode(ActionMode arg0, Menu arg1) {

                MenuInflater inflater = arg0.getMenuInflater();
                inflater.inflate(R.menu.munu_delete, arg1);
                return true;
            }

            @Override
            public boolean onPrepareActionMode(ActionMode arg0, Menu arg1) {
                return false;
            }

            @Override
            public boolean onActionItemClicked(ActionMode arg0, MenuItem arg1) {


                return true;
            }

            @Override
            public void onDestroyActionMode(ActionMode arg1) {

            }
        });



        grid.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View v, int position, long id) {


                String imagem = listOfImagesPath.get(position).toString();
                Intent i = new Intent(GaleriaaSp.this, Zomgaleria.class);//mude aqui de acordo com a sua activity
                i.putExtra("img", imagem);
                startActivity(i);

            }
        });

    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
    //    getMenuInflater().inflate(R.menu.menu_galeriaa_sp, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();

        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }

        return super.onOptionsItemSelected(item);
    }


    protected void onActivityResult(int requestCode, int resultCode, Intent data) {

        /// RECEBIMENTO DA CAMERA
        if (resultCode == RESULT_OK) {
             if(requestCode == CAMERA_CAPTURE){
                Bundle extras = data.getExtras();
                Bitmap thePic = extras.getParcelable("data");
                String imgcurTime = dateFormat.format(new Date());
                File imageDirectory = new File(GridViewDemo_ImagePath);
                imageDirectory.mkdirs();
                String _path = GridViewDemo_ImagePath + imgcurTime+".jpg";
                try {
                    FileOutputStream out = new FileOutputStream(_path);
                    thePic.compress(Bitmap.CompressFormat.JPEG, 90, out);
                    out.close();
                } catch (FileNotFoundException e) {
                    e.getMessage();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                listOfImagesPath = null;
                listOfImagesPath = RetriveCapturedImagePath();
                if(listOfImagesPath!=null){
                    grid.setAdapter(new ImageListAdapter(this,listOfImagesPath));
                }
            }
        }



        if (resultCode == RESULT_OK) {
            if(requestCode == CAMERA_GALERIA){
                Bundle extras = data.getExtras();
                Bitmap thePic = extras.getParcelable("data");
                String imgcurTime = dateFormat.format(new Date());
                File imageDirectory = new File(GridViewDemo_ImagePath);
                imageDirectory.mkdirs();
                String _path = GridViewDemo_ImagePath + imgcurTime+".jpg";
                try {
                    FileOutputStream out = new FileOutputStream(_path);
                    thePic.compress(Bitmap.CompressFormat.JPEG, 90, out);
                    out.close();
                } catch (FileNotFoundException e) {
                    e.getMessage();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                listOfImagesPath = null;
                listOfImagesPath = RetriveCapturedImagePath();
                if(listOfImagesPath!=null){
                    grid.setAdapter(new ImageListAdapter(this,listOfImagesPath));
                }
            }
        }


            /// RECEBIMENTO DA GALERIA
    }

    private List<String> RetriveCapturedImagePath() {
        List<String> tFileList = new ArrayList<String>();
        File f = new File(GridViewDemo_ImagePath);
        if (f.exists()) {
            File[] files=f.listFiles();
            Arrays.sort(files);

            for(int i=0; i<files.length; i++){
                File file = files[i];
                if(file.isDirectory())
                    continue;
                tFileList.add(file.getPath());
            }
        }
        return tFileList;
    }



    public class ImageListAdapter extends BaseAdapter
    {
        private Context context;
        private List<String> imgPic;
        public ImageListAdapter(Context c, List<String> thePic)
        {
            context = c;
            imgPic = thePic;
        }
        public int getCount() {
            if(imgPic != null)
                return imgPic.size();
            else
                return 0;
        }




        //---returns the ID of an item---
        public Object getItem(int position) {
            return position;
        }

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

        //---returns an ImageView view---
        public View getView(final int position, final View convertView, ViewGroup parent)
        {
            final ImageView imageView;
            BitmapFactory.Options bfOptions=new BitmapFactory.Options();
            bfOptions.inDither=false;                     //Disable Dithering mode
            bfOptions.inPurgeable=true;                   //Tell to gc that whether it needs free memory, the Bitmap can be cleared
            bfOptions.inInputShareable=true;             //Which kind of reference will be used to recover the Bitmap data after being clear, when it will be used in the future
            bfOptions.inTempStorage=new byte[32 * 1024];
            if (convertView == null) {
                imageView = new ImageView(context);
                imageView.setLayoutParams(new GridView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
                imageView.setPadding(0, 0, 0, 0);
            } else {
                imageView = (ImageView) convertView;
            }
            FileInputStream fs = null;
            final Bitmap bm;
            try {
                fs = new FileInputStream(new File(imgPic.get(position).toString()));

                if(fs!=null) {



                    bm=BitmapFactory.decodeFileDescriptor(fs.getFD(), null, bfOptions);
                    imageView.setImageBitmap(bm);
                    imageView.setId(position);
                    imageView.setLayoutParams(new GridView.LayoutParams(360, 370));

              /* imageView.setOnClickListener(new View.OnClickListener()
                    {
                        @Override
                        public void onClick(View v){

                        //   imgPic.remove(position).toString();
//String bm = null;

                            //String imagem = imgPic.get(position).toString();
                            //Intent i = new Intent(GaleriaSp.this, Zomgaleria.class);//mude aqui de acordo com a sua activity
                            //i.putExtra("img", imagem);
                            //startActivity(i);
                        }

                    });*/


                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally{
                if(fs!=null) {
                    try {
                        fs.close();
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }
            return imageView;
        }
    }
}

Answer 1

Within the setMultiChoiceModeListener create the variable to pick the position at the time you select from int, for example:

int position =0;

In the method onActionItemClicked you can use the listOfImagesPath.get(position) to get the address where the image is located. Then use the file.delete() to erase from the device. Now to disappear from the screen, you need to remove the item from your list in this way listOfImagesPath.remove(position). Upshot:

@Override
public boolean onActionItemClicked(ActionMode arg0, MenuItem arg1) {

    int id = arg1.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_delete) {

        File file = new File(listOfImagesPath.get(position));
        file.delete();

        listOfImagesPath.remove(position);
        arg0.finish();

        return true;
    }
    return true;
}

Good Luck!