Android Open Source - BlockchainWidget Blockchain Widget

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License

The source code is released under:

The person who associated a work with this deed has dedicated the work to the public domain by waiving all of his or her rights to the work worldwide under copyright law, including all related and nei...

Java Source Code

package com.rbonestell.bcwidget;
//from  w  w  w. j a  va 2 s.com
import java.util.Timer;
import java.util.TimerTask;

import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.SharedPreferences;
import android.os.AsyncTask;
import android.preference.PreferenceManager;
import android.util.Log;
import android.widget.RemoteViews;

import com.rbonestell.bcwidget.utils.*;

public class BlockchainWidget extends AppWidgetProvider
{
    
  @Override
  public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)
  {
    SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(context);
    int frequency = settings.getInt("frequency", 5);
    new Timer().scheduleAtFixedRate(new BlockchainTimer(context, appWidgetManager), 1, frequency * 60000);
  }
  
  // Widget update task
  private class BlockchainTimer extends TimerTask
  {
    
    RemoteViews remoteViews;
    AppWidgetManager appWidgetManager;
    ComponentName thisWidget;
    int lastBlockTime = 0;
    
    public BlockchainTimer(Context context, AppWidgetManager appWidgetManager)
    {
      this.appWidgetManager = appWidgetManager;
      remoteViews = new RemoteViews(context.getPackageName(), R.layout.main);
      Intent intent = new Intent(context, SelectFrequencyActivity.class);
        PendingIntent pendingintent = PendingIntent.getActivity(context, 0, intent, 0);
        remoteViews.setOnClickPendingIntent(R.id.rlWidgetLayout, pendingintent);
      thisWidget = new ComponentName(context, BlockchainWidget.class);
    }
    
    @Override
    public void run()
    {
      try
      {
        new BlockchainTask().execute();
      }
      catch (Exception e)
      {
        Log.w("BlockchainWidget", e.getMessage());
      }
    }
    
    public void updateValues(BlockchainResponse bResp)
    {
      if (bResp != null)
      {
        lastBlockTime = bResp.time;
        remoteViews.setTextViewText(R.id.tvBlockchainHeight, bResp.height + " blks");
        remoteViews.setTextViewText(R.id.tvOutstanding, "\u0E3F" + (210000*50 + (bResp.height-210000)*25));
        appWidgetManager.updateAppWidget(thisWidget, remoteViews);
        new Timer().scheduleAtFixedRate(new LastBlockTimer(), 1, 60000);
      }
      else 
      {
        remoteViews.setTextViewText(R.id.tvBlockchainHeight, "Error");
        remoteViews.setTextViewText(R.id.tvOutstanding, "Error");
        remoteViews.setTextViewText(R.id.tvMinutes, "Error");
        appWidgetManager.updateAppWidget(thisWidget, remoteViews);
      }
    }
    
    // Blockchain data loading task
    private class BlockchainTask extends AsyncTask<String, Integer, BlockchainResponse>
    {
      
      @Override
      protected void onPreExecute()
      {
        super.onPreExecute();  
      }

      @Override
      protected BlockchainResponse doInBackground(String... params)
      {
        try
        {
          return BlockchainRequest.getBlockchainInfo();
        }
        catch (Exception e)
        {
          Log.w("BlockchainWidget", e.getMessage());
        }
        return null;
      }

      @Override
      protected void onProgressUpdate(Integer... values)
      {
        super.onProgressUpdate(values);
      }

      @Override
      protected void onPostExecute(BlockchainResponse result)
      {
        super.onPostExecute(result);
        updateValues(result);
      }

    }
    
    // Last block timer task
    private class LastBlockTimer extends TimerTask
    {
      @Override
      public void run()
      {
        int unixNow = (int)(System.currentTimeMillis() / 1000L);
        int diffSeconds = unixNow - lastBlockTime;
        int diffMin = diffSeconds / 60;
        remoteViews.setTextViewText(R.id.tvMinutes, diffMin + ((diffMin > 1) ? " mins" : "min"));
        appWidgetManager.updateAppWidget(thisWidget, remoteViews);
      }
    }
    
  }
  
  
  
  
}

Java Source Code List

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