Synnefo » Pithos Android Client

/**

 * 

 */

package com.rackspacecloud.android;

import java.util.ArrayList;

import android.app.AlertDialog;

import android.app.ListActivity;

import android.content.Context;

import android.content.DialogInterface;

import android.content.Intent;

import android.os.AsyncTask;

import android.os.Bundle;

import android.view.LayoutInflater;

import android.view.Menu;

import android.view.MenuInflater;

import android.view.MenuItem;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ArrayAdapter;

import android.widget.ImageView;

import android.widget.ListView;

import android.widget.TextView;

import com.rackspace.cloud.servers.api.client.CloudServersException;

import com.rackspace.cloud.servers.api.client.Server;

import com.rackspace.cloud.servers.api.client.ServerManager;

/**

 * @author Mike Mayo - mike.mayo@rackspace.com - twitter.com/greenisus

 *

 */

public class ListServersActivity extends ListActivity {

        private Server[] servers;

        private Context context;

        @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        context = getApplicationContext();

        restoreState(savedInstanceState);

    }

        @Override

        protected void onSaveInstanceState(Bundle outState) {

                super.onSaveInstanceState(outState);

                outState.putSerializable("servers", servers);

        }

    private void restoreState(Bundle state) {

            if (state != null && state.containsKey("servers") && state.getSerializable("servers") != null) {

                    servers = (Server[]) state.getSerializable("servers");

                    if (servers.length == 0) {

                            displayNoServersCell();

                    } else {

                            getListView().setDividerHeight(1); // restore divider lines 

                            setListAdapter(new ServerAdapter());

                    }

            } else {

            loadServers();        

            }

    }

    protected void onListItemClick(ListView l, View v, int position, long id) {

            if (servers != null && servers.length > 0) {

                    Intent viewIntent = new Intent(this, ViewServerActivity.class);

                    viewIntent.putExtra("server", servers[position]);

                        startActivityForResult(viewIntent, 55); // arbitrary number; never used again

            }

    }

    private void loadServers() {

            displayLoadingCell();

            new LoadServersTask().execute((Void[]) null);

    }

    private void setServerList(ArrayList<Server> servers) {

            if (servers == null) {

                    servers = new ArrayList<Server>();

            }

            String[] serverNames = new String[servers.size()];

            this.servers = new Server[servers.size()];

                if (servers != null) {

                        for (int i = 0; i < servers.size(); i++) {

                                Server server = servers.get(i);

                                this.servers[i] = server;

                                serverNames[i] = server.getName();

                        }

                }

                if (serverNames.length == 0) {

                        displayNoServersCell();

                } else {

                        getListView().setDividerHeight(1); // restore divider lines 

                        setListAdapter(new ServerAdapter());

                }

    }

    private void displayLoadingCell() {

            String a[] = new String[1];

            a[0] = "Loading...";

        setListAdapter(new ArrayAdapter<String>(this, R.layout.loadingcell, R.id.loading_label, a));

        getListView().setTextFilterEnabled(true);

        getListView().setDividerHeight(0); // hide the dividers so it won't look like a list row

        getListView().setItemsCanFocus(false);

    }

    private void displayNoServersCell() {

            String a[] = new String[1];

            a[0] = "No Servers";

        setListAdapter(new ArrayAdapter<String>(this, R.layout.noserverscell, R.id.no_servers_label, a));

        getListView().setTextFilterEnabled(true);

        getListView().setDividerHeight(0); // hide the dividers so it won't look like a list row

        getListView().setItemsCanFocus(false);

    }

    private void showAlert(String title, String message) {

            //Can't create handler inside thread that has not called Looper.prepare()

            //Looper.prepare();

            try {

                AlertDialog alert = new AlertDialog.Builder(this).create();

                alert.setTitle(title);

                alert.setMessage(message);

                alert.setButton("OK", new DialogInterface.OnClickListener() {

              public void onClick(DialogInterface dialog, int which) {

                return;

            } }); 

                alert.show();

            } catch (Exception e) {

                    e.printStackTrace();

            }

    }

    private class LoadServersTask extends AsyncTask<Void, Void, ArrayList<Server>> {

            private CloudServersException exception;

                @Override

                protected ArrayList<Server> doInBackground(Void... arg0) {

                        ArrayList<Server> servers = null;

                        try {

                                servers = (new ServerManager()).createList(true, context);

                        } catch (CloudServersException e) {

                                exception = e;                                

                        }

                        return servers;

                }

                @Override

                protected void onPostExecute(ArrayList<Server> result) {

                        if (exception != null) {

                                showAlert("Error", exception.getMessage());

                        }

                        setServerList(result);

                }

    }

    @Override 

    public boolean onCreateOptionsMenu(Menu menu) {

                super.onCreateOptionsMenu(menu);

                MenuInflater inflater = getMenuInflater();

                inflater.inflate(R.menu.servers_list_menu, menu);

                return true;

        } 

    @Override 

    public boolean onOptionsItemSelected(MenuItem item) {

                switch (item.getItemId()) {

                case R.id.add_server:

                        startActivityForResult(new Intent(this, AddServerActivity.class), 56); // arbitrary number; never used again

                        return true;

                case R.id.refresh:

                        servers = null;

                        loadServers();

                return true;

                }

                return false;

        } 

        //*/

        class ServerAdapter extends ArrayAdapter<Server> {

                ServerAdapter() {

                        super(ListServersActivity.this, R.layout.listservercell, servers);

                }

                public View getView(int position, View convertView, ViewGroup parent) {

                        Server server = servers[position];

                        LayoutInflater inflater = getLayoutInflater();

                        View row = inflater.inflate(R.layout.listservercell, parent, false);

                        TextView label = (TextView) row.findViewById(R.id.label);

                        label.setText(server.getName());

                        TextView sublabel = (TextView) row.findViewById(R.id.sublabel);

                        sublabel.setText(server.getFlavor().getName() + " - " + server.getImage().getName());

                        ImageView icon = (ImageView) row.findViewById(R.id.icon);

                        icon.setImageResource(server.getImage().iconResourceId());

                        return(row);

                }

        }

        @Override

        public void onActivityResult(int requestCode, int resultCode, Intent data) {

          super.onActivityResult(requestCode, resultCode, data);

          if (resultCode == RESULT_OK) {          

                  // a sub-activity kicked back, so we want to refresh the server list

                  loadServers();

          }

        }        

}