Android Open Source - android-rackspacecloud List Container Activity

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License

The source code is released under:
MIT License
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Java Source Code

package com.rackspacecloud.android;
//  ww w .j a  v a  2s.  c  o  m
import java.util.ArrayList;

import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
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.files.api.client.Container;
import com.rackspace.cloud.files.api.client.ContainerManager;
import com.rackspace.cloud.servers.api.client.CloudServersException;

/**
 * 
 * @author Phillip Toohill
 * 
 */
public class ListContainerActivity extends GaListActivity {

  protected static final int DELETE_ID = 0;
  
  private Container[] containers;
  public Container container;
  public Container cdnContainer;
  public String[] containerNames;
  public Object megaBytes;
  public Object kiloBytes;
  public int bConver = 1048576;
  public int kbConver = 1024;
  private Context context;
  private boolean loading;
    
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    trackPageView(PAGE_CONTAINERS);
    context = getApplicationContext();
    restoreState(savedInstanceState);
  }

  @Override
  protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    outState.putSerializable("container", containers);
    outState.putBoolean("loading", loading);
  }

  private void restoreState(Bundle state) {
    if(state != null && state.containsKey("loading") && state.getBoolean("loading")){
      loadContainers();
      registerForContextMenu(getListView());
    }
    else if (state != null && state.containsKey("container") && state.getSerializable("container") != null) {
      containers = (Container[]) state.getSerializable("container");
      if (containers.length == 0) {
        displayNoServersCell();
      } else {
        getListView().setDividerHeight(1); // restore divider lines
        setListAdapter(new FileAdapter());
      }
    } else {
      loadContainers();
      registerForContextMenu(getListView());
    }
  }

  protected void onListItemClick(ListView l, View v, int position, long id) {
    if (containers != null && containers.length > 0) {
      Intent viewIntent = new Intent(this, ContainerObjectsActivity.class);
      viewIntent.putExtra("container", containers[position]);
      startActivityForResult(viewIntent, 55);
    }
  }

  private void loadContainers() {
    displayLoadingCell();
    new LoadContainersTask().execute((Void[]) null);
  }

  private void setContainerList() {
    if (containerNames.length == 0) {
      displayNoServersCell();
    } else {
      getListView().setDividerHeight(1); // restore divider lines
      setListAdapter(new FileAdapter());
    }
  }

  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 Files";
    setListAdapter(new ArrayAdapter<String>(this,
        R.layout.nocontainerscell, R.id.no_containers_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 LoadContainersTask extends
      AsyncTask<Void, Void, ArrayList<Container>> {

    private CloudServersException exception;

    @Override
    protected void onPreExecute(){
      loading = true;
    }
      
    @Override
    protected ArrayList<Container> doInBackground(Void... arg0) {
      ArrayList<Container> containers = null;

      try {
        containers = (new ContainerManager(context)).createList(true);
      } catch (CloudServersException e) {
        exception = e;
      }
      return containers;
    }

    @Override
    protected void onPostExecute(ArrayList<Container> result) {
      if (exception != null) {
        showAlert("Error", exception.getMessage());
      }
      ArrayList<Container> containerList = result;
      containerNames = new String[containerList.size()];
      containers = new Container[containerList.size()];
      if (containerList != null) {
        for (int i = 0; i < containerList.size(); i++) {
          Container container = containerList.get(i);
          containers[i] = container;
          containerNames[i] = container.getName();
        }
      }
      loading = false;
      new LoadCDNContainersTask().execute((Void[]) null);
    }
  }

  private class LoadCDNContainersTask extends
      AsyncTask<Void, Void, ArrayList<Container>> {

    private CloudServersException exception;

    @Override
    protected void onPreExecute(){
      loading = true;
    }
    
    @Override
    protected ArrayList<Container> doInBackground(Void... arg0) {
      ArrayList<Container> cdnContainers = null;

      try {
        cdnContainers = (new ContainerManager(context)).createCDNList(true);
      } catch (CloudServersException e) {
        exception = e;
      }
      return cdnContainers;
    }

    @Override
    protected void onPostExecute(ArrayList<Container> result) {
      if (exception != null) {
        showAlert("Error", exception.getMessage());
      }

      ArrayList<Container> cdnContainers = result;

      for (int i = 0; i < containers.length; i++) {
        Container container = containers[i];
        for (int t = 0; t < cdnContainers.size(); t++) {
          Container cdnContainer = cdnContainers.get(t);
          if (container.getName().equals(cdnContainer.getName())) {
            container.setCdnEnabled(cdnContainer.isCdnEnabled());
            container.setCdnUrl(cdnContainer.getCdnUrl());
            container.setTtl(cdnContainer.getTtl());
          }
        }
      }
      setContainerList();
      loading = false;
    }
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    super.onCreateOptionsMenu(menu);
    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.container_list_menu, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
    case R.id.add_container:
      startActivityForResult(
          new Intent(this, AddContainerActivity.class), 56); // arbitrary number never used again
      return true;
    case R.id.refresh:
      containers = null;
      loadContainers();
      return true;
    }
    return false;
  }

  class FileAdapter extends ArrayAdapter<Container> {
    FileAdapter() {
      super(ListContainerActivity.this, R.layout.listcontainerscell,
          containers);
    }

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

      Container container = containers[position];

      LayoutInflater inflater = getLayoutInflater();
      View row = inflater.inflate(R.layout.listcontainerscell, parent,
          false);

      TextView label = (TextView) row.findViewById(R.id.label);
      label.setText(container.getName());

      if (container.getBytes() >= bConver) {
        megaBytes = Math.abs(container.getBytes() / bConver + 0.2);
        TextView sublabel = (TextView) row.findViewById(R.id.sublabel);
        sublabel.setText(container.getCount() + " Objects " + megaBytes
            + " MB");
      } else if (container.getBytes() >= kbConver) {
        kiloBytes = Math.abs(container.getBytes() / kbConver + 0.2);
        TextView sublabel = (TextView) row.findViewById(R.id.sublabel);
        sublabel.setText(container.getCount() + " Objects " + kiloBytes
            + " KB");
      } else {
        TextView sublabel = (TextView) row.findViewById(R.id.sublabel);
        sublabel.setText(container.getCount() + " Objects "
            + container.getBytes() + " B");
      }

      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
      loadContainers();
    }
  }

}
Java Source Code List
