Top Sheet Dialog JAVA

package com.xor.admissiontest.Guardian;

import android.app.ProgressDialog;
import android.content.Context;
import android.content.Intent;
import android.graphics.Typeface;
import android.support.design.widget.AppBarLayout;
import android.support.design.widget.CollapsingToolbarLayout;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.Gravity;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.EditorInfo;
import android.view.inputmethod.InputMethodManager;
import android.widget.Button;
import android.widget.EditText;
import android.widget.RadioButton;
import android.widget.RadioGroup;

import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.JsonObjectRequest;
import com.orhanobut.dialogplus.DialogPlus;
import com.orhanobut.dialogplus.ViewHolder;
import com.xor.admissiontest.AppController;
import com.xor.admissiontest.Guardian.paging.Item;
import com.xor.admissiontest.Guardian.paging.RecyclerViewAdapter;
import com.xor.admissiontest.R;
import com.xor.admissiontest.SessionManager;
import com.xor.admissiontest.Shared;
import com.xor.admissiontest.URL;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;

public class GuardianActivity extends AppCompatActivity {

    private String TAG = GuardianActivity.class.getSimpleName();
    private Context mContext = GuardianActivity.this;
    // Session Manager Class
    private SessionManager session;
    private RecyclerView mRecyclerView;
    private RecyclerViewAdapter mAdapter;

    ArrayList<Item> itemList = new ArrayList<>();

    private DialogPlus dialogPlus = null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_guardian);
        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
        setSupportActionBar(toolbar);

        // Session class instance
        session = new SessionManager(mContext);

        initCollapsingToolbar();

        mRecyclerView = (RecyclerView) findViewById(R.id.recycler_view);
        mRecyclerView.setHasFixedSize(true);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
        mRecyclerView.setItemAnimator(new DefaultItemAnimator());

        mAdapter = new RecyclerViewAdapter(this, itemList);
        mRecyclerView.setAdapter(mAdapter);

        FloatingActionButton addPost = findViewById(R.id.fab);

        addPost.setOnClickListener(view -> {
            AlertDialog alertDialog = showPostDialog();
            alertDialog.show();
        });

        // make request to server
        getDataFromWeb();
    }

    /*
     * Make a request to server
     */
    private void getDataFromWeb() {

        final ProgressDialog dialog = new ProgressDialog(mContext);
        dialog.setTitle("Please wait...");
        dialog.setMessage("Loading nearby tutor...");
        dialog.show();

        String user_id = Shared.readData("UserID", mContext);

        JsonObjectRequest req = new JsonObjectRequest(Request.Method.GET, URL.GET_NEAR_TUTORS_URL + user_id, new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
                Log.e(TAG, response.toString());
                dialog.dismiss();

                try {
                    boolean success = response.getBoolean("success");
                    if (success) {
                        JSONArray jsonArray = response.getJSONArray("data");
                        for (int i = 0; i < jsonArray.length(); i++) {
                            JSONObject jsonObject = jsonArray.getJSONObject(i);
                            Item item = new Item();
                            item.setId(jsonObject.getString("id"));
                            item.setName(jsonObject.getString("fullname"));
                            item.setUniversity(jsonObject.getString("college"));
                            item.setImage(jsonObject.getString("pic"));
                            item.setSubject("Group: " + "Science" + ", Dept: " + jsonObject.getString("dept"));

                            itemList.add(item);
                        }

                        mAdapter.notifyDataSetChanged();

                    } else {
                        Shared.showAlert("Info", response.getString("msg"), mContext, "Ok");
                    }

                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                error.printStackTrace();
            }
        });

        // Adding request to request queue
        AppController.getInstance().addToRequestQueue(req);
    }

    private AlertDialog showPostDialog() {

        AlertDialog.Builder dialogBuilder = new AlertDialog.Builder(mContext, R.style.Theme_AppCompat_Light_Dialog_MinWidth);
        View view = getLayoutInflater().inflate(R.layout.custom_post_dialog_style, (ViewGroup) null);
        dialogBuilder.setTitle("Post for a Tutor");
        dialogBuilder.setCancelable(false);
        dialogBuilder.setView(view);

        EditText edt_class = view.findViewById(R.id.edt_class);
        EditText edt_group = view.findViewById(R.id.edt_group);
        EditText edt_school = view.findViewById(R.id.edt_school);
        EditText edt_description = view.findViewById(R.id.edt_description);

        dialogBuilder.setPositiveButton("Post", (dialogInterface, i) -> {
            dialogInterface.dismiss();
            String strClass = edt_class.getText().toString();
            String strGroup = edt_group.getText().toString();
            String strSchool = edt_school.getText().toString();
            String strDescription = edt_description.getText().toString();

            Shared.printMessage(strClass + ", " + strGroup + ", " + strSchool + ", " + strDescription, mContext);
        });

        dialogBuilder.setNegativeButton("Cancel", (dialogInterface, i) -> {
            dialogInterface.dismiss();
        });

        return dialogBuilder.create();
    }


    /*
     * Initializing collapsing toolbar
     * Will show and hide the toolbar title on scroll
     */
    private void initCollapsingToolbar() {

        Typeface customFont = Typeface.createFromAsset(getAssets(), "fonts/RealityHyperRegular.ttf");

        final CollapsingToolbarLayout collapsingToolbar = findViewById(R.id.collapsing_toolbar);
        collapsingToolbar.setCollapsedTitleTypeface(customFont);
        collapsingToolbar.setExpandedTitleTypeface(customFont);
        collapsingToolbar.setTitle(" ");

        AppBarLayout appBarLayout = (AppBarLayout) findViewById(R.id.appbar);
        appBarLayout.setExpanded(true);

        // hiding & showing the title when toolbar expanded & collapsed
        appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
            boolean isShow = false;
            int scrollRange = -1;

            @Override
            public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
                if (scrollRange == -1) {
                    scrollRange = appBarLayout.getTotalScrollRange();
                }
                if (scrollRange + verticalOffset == 0) {
                    collapsingToolbar.setTitle(getString(R.string.backdrop_title));
                    isShow = true;
                } else if (isShow) {
                    collapsingToolbar.setTitle(" ");
                    isShow = false;
                }
            }
        });
    }

    @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_guardian, menu);

//        // Associate searchable configuration with the SearchView
//        SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE);
//        SearchView searchView = (SearchView) menu.findItem(R.id.action_search).getActionView();
//        searchView.setQueryHint(Html.fromHtml("<font color = #ffffff>" + getString(R.string.search_hint) + "</font>"));
//        searchView.setMaxWidth(Integer.MAX_VALUE);
//        assert searchManager != null;
//        searchView.setSearchableInfo(searchManager.getSearchableInfo(getComponentName()));

//        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
//            @Override
//            public boolean onQueryTextSubmit(String query) {
//                Log.e("onQueryTextSubmit", query);
//                return true;
//            }
//
//            @Override
//            public boolean onQueryTextChange(String newText) {
//                Log.e("onQueryTextChange", newText);
//                return true;
//            }
//        });

        return super.onCreateOptionsMenu(menu);
    }

    @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_search) {
            showAlert();
            return true;
        } else if (id == R.id.action_my_account) {
            startActivity(new Intent(mContext, GuardianProfileActivity.class));
            return true;
        } else if (id == R.id.action_logout) {
            session.logoutUser();
            return true;
        }

        return super.onOptionsItemSelected(item);
    }


    public void showAlert() {

        dialogPlus = DialogPlus.newDialog(this)
                .setContentHolder(new ViewHolder(R.layout.top_sheet_dialog))
                .setGravity(Gravity.TOP)
                .setPadding(26, 16, 26, 16)
                .create();

        EditText edtSearch = dialogPlus.getHolderView().findViewById(R.id.edt_search);
        RadioGroup rg = dialogPlus.getHolderView().findViewById(R.id.holderRadioGroup);
        Button btnSearch = dialogPlus.getHolderView().findViewById(R.id.btn_search);

        edtSearch.setOnEditorActionListener((v, actionId, event) -> {
            if (actionId == EditorInfo.IME_ACTION_SEARCH) {
                String strSearch = v.getText().toString();
                String radioValue = ((RadioButton) findViewById(rg.getCheckedRadioButtonId())).getText().toString();
                performSearch(strSearch, radioValue);
                return true;
            }
            return false;
        });

        btnSearch.setOnClickListener(view -> {
            String strSearch = edtSearch.getText().toString();
            String radioValue = ((RadioButton) findViewById(rg.getCheckedRadioButtonId())).getText().toString();
            performSearch(strSearch, radioValue);
        });

        dialogPlus.show();

        edtSearch.requestFocus();
        showKeyboard();
    }

    private void performSearch(String strSearch, String value) {
        startActivity(new Intent(mContext, SearchResultsActivity.class)
                .setFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP)
                .putExtra("query", strSearch)
                .putExtra("group", value));
        closeKeyboard();
        dialogPlus.dismiss();


    }

    public void showKeyboard() {
        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        assert inputMethodManager != null;
        inputMethodManager.toggleSoftInput(InputMethodManager.SHOW_FORCED, 0);
    }

    public void closeKeyboard() {
        InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
        assert inputMethodManager != null;
        inputMethodManager.toggleSoftInput(InputMethodManager.HIDE_IMPLICIT_ONLY, 0);
    }

    @Override
    public void onBackPressed() {
        if (dialogPlus != null && dialogPlus.isShowing())
            dialogPlus.dismiss();
        else
            super.onBackPressed();
    }
}