Android Open Source - mobile2-android Course People Activity

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License

The source code is released under:

Apache License

Java Source Code

package com.ecollege.android;
/*  w ww .j av a2  s.c o  m*/
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import roboguice.inject.InjectExtra;
import roboguice.inject.InjectResource;
import roboguice.inject.InjectView;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.text.Html;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemSelectedListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.Spinner;
import android.widget.TextView;

import com.ecollege.android.activities.ECollegeListActivity;
import com.ecollege.android.adapter.UberAdapter;
import com.ecollege.android.adapter.UberItem;
import com.ecollege.android.util.CacheConfiguration;
import com.ecollege.api.model.Course;
import com.ecollege.api.model.RosterUser;
import com.ecollege.api.services.users.FetchRosterService;
import com.google.inject.Inject;

public class CoursePeopleActivity extends ECollegeListActivity {
  
  @Inject ECollegeApplication app;
  @Inject SharedPreferences prefs;
  @InjectView(R.id.title_text) TextView titleText;
  @InjectView(R.id.course_title_text) TextView courseTitleText;
  @InjectView(R.id.reload_button) Button reloadButton;
  @InjectView(R.id.role_dropdown) Spinner roleDropdown;
  @InjectExtra(CoursesActivity.COURSE_EXTRA) Course course;
  @InjectResource(R.string.all_roles) String allRoles;
  @InjectResource(R.string.student_role) String studentRole;
  @InjectResource(R.string.instructor_role) String instructorRole;
  
  private LayoutInflater viewInflater;
  private PeopleAdapter personAdapter;
  private OnItemSelectedListener onRoleSelected;
  private String currentRoleFilter;
  private List<RosterUser> allPeopleInCourse;
  
  @Override public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.people);
    
    viewInflater = getLayoutInflater();
    titleText.setText(R.string.people);
    
        reloadButton.setOnClickListener(new View.OnClickListener() {
      public void onClick(View v) {
        loadPeopleForCourse(true);
      }
    });
    
    displayCourse();
    loadPeopleForCourse(false);
    setupRoleFilter();
  }

  private void setupRoleFilter() {
    currentRoleFilter = allRoles;
    String[] roles = new String[] {allRoles,studentRole,instructorRole};
    ArrayAdapter<String> adapter = new ArrayAdapter<String> (this, R.layout.transparent_spinner_text_view, roles);
    adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
    roleDropdown.setAdapter(adapter);
    
    onRoleSelected = new OnItemSelectedListener() {

      public void onItemSelected(AdapterView<?> parent, View view,
          int position, long id) {
        currentRoleFilter = (String)parent.getItemAtPosition(position);        
        updateCurrentPeople();
      }

      public void onNothingSelected(AdapterView<?> parent) {
        currentRoleFilter = allRoles;
        updateCurrentPeople();
      }
      
    };
    
  }

  private void updateCurrentPeople() {
    if (allPeopleInCourse != null) {
      if (currentRoleFilter.equals(allRoles)) {
        personAdapter.updateItems(allPeopleInCourse);
      } else {
        List<RosterUser> filteredPeople = new ArrayList<RosterUser>();
        for (int i=0;i<allPeopleInCourse.size();i++) {
          RosterUser ru = allPeopleInCourse.get(i);
          if (currentRoleFilter.equals(instructorRole)) {
            if (RosterUser.ROLE_CODE_INSTRUCTOR.equals(ru.getRoleCode())) {
              filteredPeople.add(ru);
            }            
          } else if (currentRoleFilter.equals(studentRole)) {
            if (RosterUser.ROLE_CODE_STUDENT.equals(ru.getRoleCode())) {
              filteredPeople.add(ru);
            }
          }
        }
        personAdapter.updateItems(filteredPeople);
      }
    }
  }
  
  private void displayCourse() {
    courseTitleText.setText(Html.fromHtml(course.getTitle()));
  }
  
  private void loadPeopleForCourse(boolean reload) {
    personAdapter = new PeopleAdapter(this);
    setListAdapter(personAdapter);

    CacheConfiguration cacheConfiguration = new CacheConfiguration();
    cacheConfiguration.bypassFileCache = reload;
    cacheConfiguration.bypassResultCache = reload;    
    
    personAdapter.beginLoading();
    buildService(new FetchRosterService(course.getId())).configureCaching(cacheConfiguration).execute();
  }

  public void onServiceCallSuccess(FetchRosterService service) {
    roleDropdown.setOnItemSelectedListener(onRoleSelected);
    personAdapter.setLastUpdatedAt(service.getCompletedAt());
    allPeopleInCourse = service.getResult();
    Collections.sort(allPeopleInCourse);
    updateCurrentPeople();
  }
  
  public void onServiceCallException(FetchRosterService service, Exception ex) {
    personAdapter.hasError();
  }
  
  @Override
  protected void onListItemClick(ListView l, View v, int position, long id) {
    @SuppressWarnings("unchecked")
    UberItem<RosterUser> item = (UberItem<RosterUser>)l.getItemAtPosition(position);
      Intent i = new Intent(this,PersonActivity.class);
      i.putExtra(PersonActivity.COURSE_EXTRA, course);
      i.putExtra(PersonActivity.PERSON_EXTRA, item.getDataItem());
      i.putExtra(PersonActivity.FINISH_ON_CLICK_ALL_PEOPLE_EXTRA, true);
      startActivity(i);
  }
  
  protected class PersonViewHolder {
    public TextView personNameText;
    public TextView personRoleText;
  }
  
  protected class PeopleAdapter extends UberAdapter<RosterUser> {

    public PeopleAdapter(Context context) {
      super(context, true, false, false);
    }
    
    @Override
    protected Object groupIdFunction(RosterUser item) {
      return item.getLastNameFirstChar();
    }

    @Override
    protected View getDataItemView(View convertView, ViewGroup parent,
        UberItem<RosterUser> item) {
      PersonViewHolder holder;
      if (convertView == null) {
        holder = new PersonViewHolder();
        convertView = viewInflater.inflate(R.layout.person_list_item, null);
        holder.personNameText = (TextView) convertView.findViewById(R.id.person_name_text);
        holder.personRoleText = (TextView) convertView.findViewById(R.id.person_role_text);
        convertView.setTag(holder);
      } else {
        holder = (PersonViewHolder) convertView.getTag();
      }
      RosterUser user = item.getDataItem();
      holder.personNameText.setText(user.getDisplayName());
      holder.personRoleText.setText(user.getFriendlyRole());
      return convertView;
    }
  }
  

}

Java Source Code List

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