Discussion on: Help with code JAVA

Button btnAddFile, btnSend;
GridView listViewFiles;

ArrayList<Uri> arrayUri = new ArrayList<> ( );
ArrayAdapter<Uri> myFileListAdapter;

final int RQS_LOADIMAGE = 0;
final int RQS_SENDEMAIL = 1;
private int MY_PERMISSIONS_REQUEST_READ_MEDIA_;
private int MY_REQUEST_CODE;
private int PICK_IMAGE_MULTIPLE;
public GridView gvGallery;
private ArrayList<String> imagesEncodedList;
private String imageEncoded;
private GalleryAdapter galleryAdapter;
private ArrayList uri;
private File fileIn;
private Uri imageUri;
private int SELECT_IMAGE;
private Uri fileUri;
private boolean imagebitmap;
private boolean isImage;
private String file;
private Uri mArrayUri;
private boolean allPath;


@SuppressLint("WrongViewCast") @Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate ( savedInstanceState );
    setContentView ( R.layout.gallery );


    gvGallery = (GridView) findViewById ( R.id.gv );


    int permissionCheck = ContextCompat.checkSelfPermission ( this ,
                                                              Manifest.permission.WRITE_EXTERNAL_STORAGE );

    if (permissionCheck != PackageManager.PERMISSION_GRANTED) {
        ActivityCompat.requestPermissions ( this ,
                                            new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE} ,
                                            MY_PERMISSIONS_REQUEST_READ_MEDIA_ );
    } else {
        readDataExternal ( );
    }

    btnAddFile = findViewById ( R.id.add );
    btnSend = findViewById ( R.id.async );
    btnAddFile.setOnClickListener ( btnAddFileOnClickListener );
    btnSend.setOnClickListener ( btnSendOnClickListener );

    myFileListAdapter = new ArrayAdapter<> (
            Gallery.this,
            android.R.layout.simple_expandable_list_item_2,
            arrayUri);
    listViewFiles = findViewById ( R.id.gv );
    listViewFiles.setAdapter ( myFileListAdapter );
}


private void readDataExternal( ) {


}


View.OnClickListener btnAddFileOnClickListener
        = new View.OnClickListener ( ) {


     public void onClick(View v) {
        /*Intent intent = new Intent ( Intent.ACTION_GET_CONTENT,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        Intent shareIntent = new Intent(Intent.ACTION_SEND_MULTIPLE);
        shareIntent.setType("image/*");
        startActivityForResult ( Intent.createChooser ( intent,"Select Picture" ), RQS_LOADIMAGE );*/

        /*Intent intent = new Intent();
        intent.setType("video/*, image/*");
        intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select Images"), PICK_IMAGE_MULTIPLE);*/




        Intent intent2 = new Intent (Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
        startActivityForResult (intent2, PICK_IMAGE_MULTIPLE);
    }


};






View.OnClickListener btnSendOnClickListener
        = new View.OnClickListener ( ) {

    @Override
    public void onClick(View v) {
        sendAttachments ( );


    }


};


@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    // TODO Auto-generated method stub
    super.onActivityResult (requestCode, resultCode, data);



    try {
        // When an Image is picked
        if (requestCode == PICK_IMAGE_MULTIPLE && resultCode == RESULT_OK
                && null != data) {
            // Get the Image from data

            String[] filePathColumn = { MediaStore.Images.Media.DATA };
            imagesEncodedList = new ArrayList<String>();
            if(data.getData()!=null){

                Uri mImageUri=data.getData();

                // Get the cursor
                Cursor cursor = getContentResolver().query(mImageUri,
                        filePathColumn, null, null, null);
                // Move to first row
                cursor.moveToFirst();

                int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                imageEncoded  = cursor.getString(columnIndex);
                cursor.close();

                ArrayList<Uri> uris  = new ArrayList<Uri>();
                uris .add(mImageUri);
                galleryAdapter = new GalleryAdapter(getApplicationContext(),uris );
                gvGallery.setAdapter(galleryAdapter);

            } else {
                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
                    if (data.getClipData() != null) {
                        ClipData mClipData = null;
                        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
                            mClipData = data.getClipData();
                        }
                        ArrayList<Uri> mArrayUri = new ArrayList<Uri>();
                        for (int i = 0; i < mClipData.getItemCount(); i++) {

                            ClipData.Item item = mClipData.getItemAt(i);
                            Uri uri = item.getUri();
                            mArrayUri.add(uri);
                            // Get the cursor
                            Cursor cursor = getContentResolver().query(uri, filePathColumn, null, null, null);
                            // Move to first row
                            cursor.moveToFirst();

                            int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
                            imageEncoded  = cursor.getString(columnIndex);
                            imagesEncodedList.add(imageEncoded);
                            cursor.close();

                            galleryAdapter = new GalleryAdapter(getApplicationContext(),mArrayUri);
                            gvGallery.setAdapter(galleryAdapter);

                        }
                        Log.v("LOG_TAG", "Selected Images" + mArrayUri.size());
                    }
                }
            }
        } else {
            startActivity (new Intent(this, Finished.class));
        }
    } catch (Exception e) {
        Toast.makeText ( this , "Something went wrong" , Toast.LENGTH_LONG )
                .show ( );
    }


    if (resultCode == RESULT_OK) {
            switch (requestCode) {
                case RQS_LOADIMAGE:
                    Uri imageUri = data.getData ( );
                    arrayUri.add (imageUri);
                    myFileListAdapter.notifyDataSetChanged ( );
                    break;
                case RQS_SENDEMAIL:
                    break;


            }

         /* Toast.makeText(Gallery.this, "Stored Your Image", Toast.LENGTH_LONG)
                    .show();*/
    }

    }











private void sendAttachments() {


    String text1 = getIntent ( ).getStringExtra ("text");
    String text2 = getIntent ( ).getStringExtra ("text1");
    String text3 = getIntent ( ).getStringExtra ("text2");
    String vin = mVin.getText ( ).toString ( );
    String make = mMake.getText ( ).toString ( );
    String model = mModel.getText ( ).toString ( );
    String yr = mYr.getText ( ).toString ( );
    String cond = mCondition.getText ( ).toString ( );
    String[] emailAddressList = {"sarkisdx@gmail.com"};
    String mycontent;
    mycontent = vin + "|" + make + "|" + model + "|" + yr + "|" + cond + "|" + text1 + "|" + text2 + "|" + text3;
    StringBuilder new_string = new StringBuilder ( );
    for (String i : mycontent.split (Pattern.quote ("|"))) {
        new_string.append (i);
        new_string.append ("\n");
    }



    Intent email = new Intent (Intent.ACTION_SEND_MULTIPLE);
    email.setType ("plain/text");
    email.setType ("image/*");
    email.putExtra (Intent.EXTRA_TEXT, new_string.toString ( ));
    email.putExtra(Intent.EXTRA_STREAM, arrayUri);
    email.setFlags (Intent.FLAG_GRANT_READ_URI_PERMISSION);
    email.addFlags (Intent.FLAG_GRANT_WRITE_URI_PERMISSION);
    ArrayList<Uri> uris = new ArrayList<>();
    email.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);



    if (arrayUri.isEmpty ( )) {
        //Send email without photo attached
        email.setAction (Intent.ACTION_SEND);
        email.setType ("plain/text");
    } else if (arrayUri.size ( ) == 1) {
        //Send email with ONE photo attached
        email.setAction (Intent.ACTION_SEND);
        email.putExtra (Intent.EXTRA_STREAM, arrayUri.get (0));
        email.setType ("image/*");
    } else {
        //Send email with MULTI photo attached
        email.setAction (Intent.ACTION_SEND_MULTIPLE);
        email.putParcelableArrayListExtra (Intent.EXTRA_STREAM, arrayUri);
        email.setType ("image/*");


    }

    startActivityForResult(Intent.createChooser(email, "Sending multiple attachment"), RQS_SENDEMAIL);

}