Android Open Source - AskTheUniverseAndroidApp List Questions Activity

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From Project

Back to project page AskTheUniverseAndroidApp.

License

The source code is released under:

MIT License

Java Source Code

package com.example.asktheuniverse;
//w  w w . java2s.c  o  m
import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Set;


import com.appspot.asktheuniverseaquestion.questionService.QuestionService;
import com.appspot.asktheuniverseaquestion.questionService.model.AskTheUniverseAQuestionQuestion;
import com.appspot.asktheuniverseaquestion.questionService.model.AskTheUniverseAQuestionQuestionCollection;

import android.os.AsyncTask;
import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

import android.accounts.Account;
import android.accounts.AccountManager;

public class ListQuestionsActivity extends Activity {
  private QuestionsDataAdapter mListAdapter;
  ListView listView = null;
  private Application app = null;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_list_questions);
    getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);

    app = (Application) this.getApplicationContext();
        
    listView = (ListView) findViewById(R.id.questions_list_view);
    mListAdapter = new QuestionsDataAdapter(app);
    listView.setAdapter(mListAdapter);
  }

  
  @Override
  protected void onStart(){
    super.onStart();
    
    Log.d("DEBUG", "onstart of ListQuestionActivity called");
    final AsyncTask<Integer, Void, AskTheUniverseAQuestionQuestionCollection> getAndDisplayQuestions =
              new AsyncTask<Integer, Void, AskTheUniverseAQuestionQuestionCollection> () {
                  @Override
                  protected AskTheUniverseAQuestionQuestionCollection doInBackground(Integer... integers) {
                      // Retrieve service handle.
                      QuestionService apiServiceHandle = AppConstants.getApiServiceHandle(app.credential);

                      try {
                        Log.d("DEBUG", "run async api call");
                        QuestionService.QuestionServiceOperations getQuestionsCommand = apiServiceHandle.questionService();
                        AskTheUniverseAQuestionQuestionCollection questions = getQuestionsCommand.getAllQuestions().execute();
                          return questions;
                      } catch (IOException e) {
                        e.printStackTrace();
                      }
                      
                      Log.d("DEBUG", "async returning null");
                      return null;
                  }

                  @Override
                  protected void onPostExecute(AskTheUniverseAQuestionQuestionCollection questions) {
                    displayQuestions(questions);
                  }
              };
    
    listView.setOnItemClickListener(new AdapterView.OnItemClickListener(){
      public void onItemClick(AdapterView parent, View v, int position, long id){
        AskTheUniverseAQuestionQuestion question = mListAdapter.getItem(position);
        Bundle bundle = new Bundle();
        
        Log.d("DEBUG", "questionId from listview callback is: " + question.getId());
        bundle.putLong("questionId", question.getId());
        bundle.putString("questionText", question.getQuestion());
        
        Intent i = new Intent(ListQuestionsActivity.this, com.example.asktheuniverse.AnswerQuestionActivity.class);
        i.putExtras(bundle);
        
        startActivity(i);
      }
    });
    
    getAndDisplayQuestions.execute();
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }
  
  static class QuestionsDataAdapter extends ArrayAdapter<AskTheUniverseAQuestionQuestion> {
        QuestionsDataAdapter(Application application) {
            super(application.getApplicationContext(), R.layout.list_view_items,
                    application.questions);
        }

        void replaceData(AskTheUniverseAQuestionQuestionCollection questions) {
            clear();
            List<AskTheUniverseAQuestionQuestion> list = questions.getItems();
            
            if (list == null || list.isEmpty()){
              Toast t = Toast.makeText(this.getContext(), "No questions left, universe is answered.", Toast.LENGTH_LONG);
            t.show();
            }
            else{
              for (AskTheUniverseAQuestionQuestion question : list) {
                //Log.d("DEBUG", question.toString());
                add(question);
              }
            }
        }

        @Override
        public View getView(int position, View convertView, ViewGroup parent) {
            AskTheUniverseAQuestionQuestion question = (AskTheUniverseAQuestionQuestion)this.getItem(position);
            
            if (convertView == null) {
                convertView = LayoutInflater.from(getContext()).inflate(R.layout.list_view_items, null);
            
            }
            
            TextView questionText = (TextView) convertView.findViewById(R.id.question_item);
            questionText.setText(question.getQuestion());
            
            return convertView;
        }
    }
  
  private void displayQuestions(AskTheUniverseAQuestionQuestionCollection questions) {
    Log.d("DEBUG","displayQuestions called");
    if (questions == null){
      Toast t = Toast.makeText(this, "Failed to fetch questions, please try again.", Toast.LENGTH_LONG);
        t.show();
        this.finish();
    }
    else{
      mListAdapter.replaceData(questions);
    }
  }
}

Java Source Code List

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