Android widget on every ImageView click instantiates new object

Question

I'm brand new to developing widgets for android so please bear with me if this is a stupid question. I'm writing my own mp3 player specific to my needs. I have it working great as an app, but now I'd like to pull it out into a homescreen widget as well (more for the learning exercise than anything else).

I split out my mp3 player logic into a separate class, and when I try and intantiate an object from that class with a button click from my widget, it works fine. The problem is, I can't seem to use that same object for the next time that button is clicked or any other button for that matter. Instead, it recreates a new object each time a button is clicked inside my widget. I'm just trying to make my play/pause ImageView function properly.

Here is the code for my WidgetProvider

package com.example.musicplayerforburrito;

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.widget.RemoteViews;



public class MyWidgetProvider extends AppWidgetProvider {

    public static String WIDGET_PLAY_BUTTON = "android.appwidget.action.PLAY_PAUSE_WIDGETS";
    MusicPlayerClass mpc = new MusicPlayerClass();

  @Override
  public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds) {


      RemoteViews remoteViews = new RemoteViews(context.getPackageName(), R.layout.widget_layout);
      ComponentName watchWidget = new ComponentName(context, MyWidgetProvider.class);

      remoteViews.setOnClickPendingIntent(R.id.playpausewidget, getPendingSelfIntent(context, WIDGET_PLAY_BUTTON));
      appWidgetManager.updateAppWidget(watchWidget, remoteViews);
  }

  @Override
  public void onReceive(Context context, Intent intent) {
      // TODO Auto-generated method stub
      super.onReceive(context, intent);
      AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(context);
      RemoteViews remoteViews = new RemoteViews( context.getPackageName(), R.layout.widget_layout );
      ComponentName watchWidget = new ComponentName(context, MyWidgetProvider.class);
      if (WIDGET_PLAY_BUTTON.equals(intent.getAction())) {

          if(!mpc.hasFolders)
              mpc.Initialize();
          if(!mpc.isPlaying)
          {
              remoteViews.setTextViewText(R.id.mp3filename, mpc.StartSong());
              remoteViews.setImageViewResource(R.id.playpausewidget, R.drawable.pause); 
          }
          else
          {
              mpc.PauseMusic();
              remoteViews.setImageViewResource(R.id.playpausewidget, R.drawable.play); 
          }
          appWidgetManager.updateAppWidget(watchWidget, remoteViews);     
      }      
  }

  protected PendingIntent getPendingSelfIntent(Context context, String action) {
      Intent intent = new Intent(context, getClass());
      intent.setAction(action);
      return PendingIntent.getBroadcast(context, 0, intent, 0);
  }
} 

any suggestions would be greatly appreciated.

TIA

Answer 1

If you want an object to be associated with the class instead of having one for each instance you need to declare it as static. That means that each time your create an instance of the containing class they will all reference the same object.