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.ListView;

import android.widget.TextView;

import com.rackspace.cloud.loadbalancer.api.client.LoadBalancer;

import com.rackspace.cloud.loadbalancer.api.client.LoadBalancerManager;

import com.rackspace.cloud.loadbalancer.api.client.http.LoadBalancersException;

public class ListLoadBalancersActivity extends ListActivity {

        private final int ADD_LOAD_BALANCER_CODE = 22;

        private LoadBalancer[] loadBalancers;

        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("loadBalancers", loadBalancers);

        }

        private void restoreState(Bundle state) {

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

                        loadBalancers = (LoadBalancer[]) state.getSerializable("loadBalancers");

                        if (loadBalancers.length == 0) {

                                displayNoLoadBalancerCell();

                        } else {

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

                                setListAdapter(new LoadBalancerAdapter());

                        }

                } else {

                        loadLoadBalancers();

                }

        }

          private void displayNoLoadBalancerCell() {

                    String a[] = new String[1];

                    a[0] = "No Load Balancers";

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

                getListView().setTextFilterEnabled(true);

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

                getListView().setItemsCanFocus(false);

            }

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

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

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

                        viewIntent.putExtra("loadBalancer", loadBalancers[position]);

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

                        // used again

                }

        }

        private void loadLoadBalancers() {

                displayLoadingCell();

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

        }

        private void setLoadBalancersList(ArrayList<LoadBalancer> loadBalancers) {

                if (loadBalancers == null) {

                        loadBalancers = new ArrayList<LoadBalancer>();

                }

                String[] loadBalancerNames = new String[loadBalancers.size()];

                this.loadBalancers = new LoadBalancer[loadBalancers.size()];

                if (loadBalancers != null) {

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

                                LoadBalancer loadBalancer = loadBalancers.get(i);

                                this.loadBalancers[i] = loadBalancer;

                                loadBalancerNames[i] = loadBalancer.getName();

                        }

                }

                if (loadBalancerNames.length == 0) {

                        displayNoLoadBalancerCell();

                } else {

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

                        setListAdapter(new LoadBalancerAdapter());

                }

        }

        @Override

        public boolean onCreateOptionsMenu(Menu menu) {

                super.onCreateOptionsMenu(menu);

                MenuInflater inflater = getMenuInflater();

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

                return true;

        }

        @Override

        public boolean onOptionsItemSelected(MenuItem item) {

                switch (item.getItemId()) {

                case R.id.add_loadbalancer:

                        startActivityForResult(new Intent(this, AddLoadBalancerActivity.class), ADD_LOAD_BALANCER_CODE); 

                        return true;

                case R.id.refresh:

                        loadBalancers = null;

                        loadLoadBalancers();

                        return true;

                }

                return false;

        }

         // * Adapter/

        class LoadBalancerAdapter extends ArrayAdapter<LoadBalancer> {

                LoadBalancerAdapter() {

                        super(ListLoadBalancersActivity.this,

                                        R.layout.list_loadbalancer_item, loadBalancers);

                }

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

                        LoadBalancer loadBalancer = loadBalancers[position];

                        LayoutInflater inflater = getLayoutInflater();

                        View row = inflater.inflate(R.layout.list_loadbalancer_item,

                                        parent, false);

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

                        label.setText(loadBalancer.getName());

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

                        sublabel.setText("ID: " + loadBalancer.getId());

                        return (row);

                }

        }

        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 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 LoadLoadBalancersTask extends AsyncTask<Void, Void, ArrayList<LoadBalancer>> {

                private LoadBalancersException exception;

                @Override

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

                        ArrayList<LoadBalancer> loadBalancers = null;

                        try {

                                loadBalancers = (new LoadBalancerManager(context)).createList();

                        } catch (LoadBalancersException e) {

                                exception = e;

                        }

                        return loadBalancers;

                }

                @Override

                protected void onPostExecute(ArrayList<LoadBalancer> result) {

                        if (exception != null) {

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

                        }

                        setLoadBalancersList(result);

                }

        }

        @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

                        loadLoadBalancers();

                }

        }

}