CardUpdate.java

package com.stanleycen.facebookanalytics;

import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.database.sqlite.SQLiteDatabase;
import android.os.AsyncTask;
import android.os.Handler;
import android.os.Message;
import android.os.Messenger;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.Button;
import android.widget.ProgressBar;
import android.widget.TextView;


public class CardUpdate implements CardItem {
    private int viewType;
    CardUpdateHolder holder;


    public int getViewType() {
        return viewType;
    }

    public CardUpdate(int viewType) {
        this.viewType = viewType;
    }

    @Override
    public boolean isEnabled() {
        return false;
    }

    @Override
    public View getView(LayoutInflater inflater, View convertView, int position, final Context context) {
        View v = convertView;

        if (v == null) {
            v = (View) inflater.inflate(R.layout.card_update, null);
            holder = new CardUpdateHolder();
            holder.status = (TextView) v.findViewById(R.id.status);
            holder.update = (Button) v.findViewById(R.id.button_update);
            holder.delete = (Button) v.findViewById(R.id.button_delete);
            holder.bar = (ProgressBar) v.findViewById(R.id.progressBar);
            holder.context = context;
            v.setTag(holder);
        } else {
            holder = (CardUpdateHolder) v.getTag();
        }

        GlobalApp.get().updateState.holder = holder;

        reloadControlState();
        setUpdateClickListener(context);
        setClearClickListener(context);

        return v;
    }

    private class ClearTask extends AsyncTask<Void, Void, Void> {
        ProgressDialog dialog;
        Context ctx;

        public ClearTask(final Context context) {
            dialog = new ProgressDialog(context);
            this.ctx = context;
        }

        @Override
        protected void onPreExecute() {
            dialog.setMessage("Clearing data");
            dialog.show();
            super.onPreExecute();
        }

        @Override
        protected Void doInBackground(Void... arg0) {
            DatabaseHandler dbHelper = GlobalApp.get().db;
            SQLiteDatabase db = dbHelper.getWritableDatabase();

            db.beginTransaction();
            try {
                dbHelper.clearAllTables(db);
                db.setTransactionSuccessful();
            } catch (Exception e) {
            } finally {
                db.endTransaction();
            }

            GlobalApp.get().fb.fbData = new FBData();
            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            dialog.dismiss();
            super.onPostExecute(result);
            reloadFragment(holder.context);
        }

    }

    ;

    private void setClearClickListener(final Context context) {
        holder.delete.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                new AlertDialog.Builder(context).setTitle("Clear data?")
                        .setMessage("This cannot be undone.")
                        .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                new ClearTask(context).execute();
                            }
                        })
                        .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {

                            }
                        }).show();
            }
        });
    }

    private void reloadControlState() {
        GlobalApp.UpdateState us = GlobalApp.get().updateState;
        CardUpdateHolder h = GlobalApp.get().updateState.holder;
        if (us.updating) {
            DataDownloaderService.ProgressBarUpdate pbu = GlobalApp.get().updateState.pbu;

            h.bar.setVisibility(View.VISIBLE);
            h.update.setEnabled(false);
            h.delete.setEnabled(false);
            if (pbu != null) {
                h.status.setText(pbu.content);
                h.bar.setIndeterminate(pbu.ongoing);
                if (!pbu.ongoing)
                    h.bar.setProgress((int) (100.0F * (double) pbu.progress / (double) pbu.mx));
            }
        } else {
            h.bar.setVisibility(View.GONE);
            h.status.setText(R.string.manage_data);
            h.update.setEnabled(true);
            h.delete.setEnabled(true);
        }
    }

    private void setUpdateClickListener(final Context context) {
        holder.update.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                new AlertDialog.Builder(context).setTitle("Update data?")
                        .setMessage("This may take a while.")
                        .setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                GlobalApp.get().updateState.updating = true;
                                reloadControlState();
                                holder.bar.setIndeterminate(true);
                                Intent it = new Intent(context, DataDownloaderService.class);
                                Handler handler = new Handler() {
                                    @Override
                                    public void handleMessage(Message msg) {
                                        if (msg.what == DataDownloaderService.MessageType.UPDATE_PROGRESSBAR.ordinal()) {
                                            GlobalApp.get().updateState.pbu = (DataDownloaderService.ProgressBarUpdate) msg.obj;
                                            reloadControlState();
                                        } else if (msg.what == DataDownloaderService.MessageType.FINISHED_DOWNLOAD.ordinal()) {
                                            GlobalApp.get().updateState.updating = false;
                                            reloadControlState();
                                            reloadFragment(holder.context);
                                        }
                                    }
                                };
                                it.putExtra(DataDownloaderService.EXTRA_MESSENGER, new Messenger(handler));
                                context.startService(it);
                            }
                        })
                        .setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {

                            }
                        }).show();
            }
        });
    }

    private void reloadFragment(Context context) {
        try {
            MainActivity ma = (MainActivity) context;
            if (ma != null) ma.reloadPosition(MainActivity.DRAWER_DATA_COLLECT);
        } catch (Exception e) {

        }
    }

    public class CardUpdateHolder {
        public TextView status;
        public Button update;
        public Button delete;
        public ProgressBar bar;
        public Context context;
    }
}