Code Styling

MainActivity.java

package com.fbalashov.spikingproject;

import android.content.Context;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.view.MenuItemCompat;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.SearchView;
import android.util.Log;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;

/**
 * Note this is not a fully functional class. It is intended to model how to design different elements of Java
 * to achieve good styling.
 */
public abstract class MainActivity extends AppCompatActivity {

  private static final String LOG_TAG = AppCompatActivity.class.getSimpleName();
  public static final String IMAGE_URL_EXTRA = "AppCompatActivity.ImageUrl";

  private SearchView mSearchView;
  private String imageUrl;

  /**
   * Returns the currently visible fragment
   */
  abstract protected MainActivityFragment getCurrentFragment();

  /**
   * Starts the main activity, normally we would not have this method for an abstract activity class
   */
  public static void startMainActivity(Context context, String imageUrl) {
    Intent startIntent = new Intent(context, MainActivity.class);
    startIntent.putExtra(IMAGE_URL_EXTRA, imageUrl);
    context.startActivity(startIntent);
  }

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    imageUrl = getIntent().getExtras().getString(IMAGE_URL_EXTRA);
    View content = findViewById(android.R.id.content);
    View text = findViewById(R.id.question_text_view);

    content.setOnLongClickListener(new View.OnLongClickListener() {
      @Override
      public boolean onLongClick(View view) {
        Toast.makeText(getApplicationContext(), R.string.edit_warning_message, Toast.LENGTH_SHORT).show();
        return false;
      }
    });
    text.setOnLongClickListener(new View.OnLongClickListener() {
      @Override
      public boolean onLongClick(View view) {
        Log.d(LOG_TAG, "Ignoring click on content");
        return true;
      }
    });
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.search_menu, menu);
    this.configureSearchView(menu);
    return super.onCreateOptionsMenu(menu);
  }

  /**
   * Configures the UI of the search view.
   * @param menu the menu with the SearchView
   */
  private void configureSearchView(Menu menu) {
    MenuItem search = menu.findItem(R.id.search);
    this.mSearchView = (SearchView)
        MenuItemCompat.getActionView(search);
    this.mSearchView.setSubmitButtonEnabled(false);
    this.mSearchView.setIconifiedByDefault(true);
    getCurrentFragment().setSearchViewListeners(mSearchView);
  }

  /**
   * Children of the MainActivity should allow the activity to refresh their data and get their search views.
   */
  interface MainActivityFragment {
    /**
     * forces fragment to refresh their data
     */
    void reloadData();

    /**
     * Allows the child fragment to set listeners on the given search view.
     */
    void setSearchViewListeners(SearchView searchView);
  }

  /**
   * An inner class for loading an image from a url
   */
  private class FetchImage extends AsyncTask {
    private String imageUrl;

    public FetchImage(String imageUrl) {
      this.imageUrl = imageUrl;
    }

    @Override
    protected Object doInBackground(Object[] objects) {
      // fetch image from url
      return null;
    }

    @Override
    protected void onPostExecute(Object o) {
      super.onPostExecute(o);
      // update image
    }
  }
}