Android Open Source - latest-gists-android Main Activity

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License

The source code is released under:

MIT License

Java Source Code

package com.coolmodev.latestgists;
// w  w w  . ja v a  2s  .c  o  m
import java.util.List;

import android.net.ConnectivityManager;
import android.os.AsyncTask;
import android.os.Bundle;
import android.app.ListActivity;
import android.content.Context;
import android.content.Intent;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ProgressBar;

public class MainActivity extends ListActivity implements OnItemClickListener {

  private FetchGistsTask mFetchGistsTask;
  private ProgressBar mProgressBar;
  private List<Gist> mGists;
  
  public static Gist selectedGist;
  
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        mProgressBar = (ProgressBar)findViewById(R.id.progress_bar);
        getListView().setOnItemClickListener(this);
    }

    @Override
    protected void onResume() {
      super.onResume();
      if (isConnected()) {
        mFetchGistsTask = new FetchGistsTask();
        mFetchGistsTask.execute((Void)null);
      } else {
        // contstruct AlertDialog to indicate no network connectivity? or use empty behavior for list?
      }
    }
    
    @Override
    protected void onPause() {
      super.onPause();
      if (mFetchGistsTask != null) {
        mFetchGistsTask.cancel(true);
      }
    stopSpinner();
    }
    
    @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;
    }
 
    private void startSpinner() {
        if (mProgressBar != null) {
          mProgressBar.setVisibility(View.VISIBLE);
        }
    }
   
    private void stopSpinner() {
      if (mProgressBar != null) {
          mProgressBar.setVisibility(View.GONE);        
      }
    }
    
    private boolean isConnected() {
      ConnectivityManager conn = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
      return conn.getActiveNetworkInfo().isConnected();
    }
    
    private class FetchGistsTask extends AsyncTask<Void, Void, Void> {

      @Override
      protected void onPreExecute() {
        startSpinner();
      }
      
    @Override
    protected Void doInBackground(Void... params) {
      mGists = GistParser.fetchGists();
      return null;
    }
 
    @Override
    protected void onPostExecute(Void v) {
      stopSpinner();
      getListView().setAdapter(new GistAdapter(MainActivity.this, mGists));
    }
    }

  @Override
  public void onItemClick(AdapterView<?> list, View v, int position, long id) {
    Gist gist = (Gist)list.getAdapter().getItem(position);
    if (gist.getFiles().size() > 1) {
      selectedGist = gist;
      Intent i = new Intent(this, FilesListActivity.class);
      startActivity(i);
    } else {
      String gistFileUrl = gist.getFiles().get(0).getUrl();
      Intent i = new Intent(this, DetailActivity.class);
      i.putExtra(Constants.GIST_FILE_URL_KEY, gistFileUrl);
      startActivity(i);
    }
  }
}

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