AsyncTask_MainActitivity.java

package benktesh.smartstock;
import android.app.ActivityOptions;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.v7.app.AppCompatActivity;
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.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.Toast;
import java.util.ArrayList;
import benktesh.smartstock.Model.Stock;
import benktesh.smartstock.UI.CommonUIHelper;
import benktesh.smartstock.UI.StockDetailActivity;
import benktesh.smartstock.Utils.MarketAdapter;
import benktesh.smartstock.Utils.NetworkUtilities;
import benktesh.smartstock.Utils.PortfolioAdapter;
import benktesh.smartstock.Utils.SmartStockConstant;

public class MainActivity extends AppCompatActivity implements
        MarketAdapter.ListItemClickListener, PortfolioAdapter.ListItemClickListener {

    private static final String TAG = MainActivity.class.getSimpleName();
    CommonUIHelper mCommonUIHelper;
    ArrayList<Stock> mMarketData;
    private Toast mToast;
    //The following are for market summary
    private MarketAdapter mAdapter;
    private RecyclerView mMarketRV;
    private ProgressBar spinner;

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

        spinner = findViewById(R.id.progressbar);

        FloatingActionButton fab = findViewById(R.id.fab);
        fab.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                Intent Email = new Intent(Intent.ACTION_SEND);
                Email.setType(getString(R.string.label_emailtype));
                Email.putExtra(Intent.EXTRA_EMAIL,
                        new String[]{getString(R.string.label_developer_contat_email)});  //developer 's email
                Email.putExtra(Intent.EXTRA_SUBJECT,
                        R.string.label_feedback_subject); // Email 's Subject
                Email.putExtra(Intent.EXTRA_TEXT, getString(R.string.label_address_developer) + "");  //Email 's Greeting text
                startActivity(Intent.createChooser(Email, getString(R.string.label_send_feedback)));
            }
        });

        if (mCommonUIHelper == null) {
            mCommonUIHelper = new CommonUIHelper(this);
        }

        mMarketRV = findViewById(R.id.rv_market_summary);
        LinearLayoutManager layoutManager = new LinearLayoutManager(this);
        mMarketRV.setLayoutManager(layoutManager);
        mMarketRV.setHasFixedSize(true);
        mAdapter = new MarketAdapter(mMarketData, this);
        mMarketRV.setAdapter(mAdapter);
        LoadView();
    }

    private void LoadView() {
        Log.d(TAG, "Getting Market Data Async");
        new NetworkQueryTask().execute(SmartStockConstant.QueryMarket);
    }

    private void MakeToast(String msg) {
        Toast.makeText(getApplicationContext(), msg, Toast.LENGTH_SHORT).show();
    }

    public boolean onCreateOptionsMenu(Menu menu) {
        return mCommonUIHelper.ConfigureSearchFromMenu(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.
        if (mCommonUIHelper.MakeMenu(item)) return true;
        return super.onOptionsItemSelected(item);
    }


    @Override
    public void onListItemClick(Stock data) {
        if (mToast != null) {
            mToast.cancel();
        }
        Intent intent = new Intent(this.getApplicationContext(), StockDetailActivity.class);
        intent.putExtra(SmartStockConstant.ParcelableStock, data);
        Bundle bundle = ActivityOptions.makeSceneTransitionAnimation(this).toBundle();
        startActivity(intent, bundle);
    }

    /*
    This is an async task that fetches data from network and new data is applied to adapter.
    Also makes a long toast message when fails to retrieve information from the network
    It takes void, void and returns ArrayList<?>
     */
    class NetworkQueryTask extends AsyncTask<String, Integer, ArrayList<Stock>> {

        private String query;

        @Override
        protected void onPreExecute() {
            if (spinner != null) {
                spinner.setVisibility(View.VISIBLE);
            }
        }

        @Override
        protected ArrayList<Stock> doInBackground(String... params) {
            query = params[0];

            ArrayList<Stock> searchResults = null;
            try {

                searchResults = NetworkUtilities.getStockData(getApplicationContext(), query);

                for (int i = 0; i <= 100; i = i + 25) {
                    Thread.sleep(500);
                    publishProgress(i);
                }

            } catch (Exception e) {
                Log.e(TAG, e.toString());
            }
            return searchResults;
        }


        @Override
        protected void onProgressUpdate(Integer... progress) {
            super.onProgressUpdate(progress);
            Toast.makeText(getApplicationContext(), "Progress:  " + progress[0] + "(%)", Toast.LENGTH_SHORT).show();
        }


        @Override
        protected void onPostExecute(ArrayList<Stock> searchResults) {
            super.onPostExecute(searchResults);

            if (searchResults != null && searchResults.size() != 0) {
                mAdapter.resetData(searchResults);
            }

            if (spinner.getVisibility() == View.VISIBLE) {
                spinner.setVisibility(View.GONE);
            }
        }
    }
}