Android Open Source - BatteryWidget-gyu Battery Widget

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License

The source code is released under:

GNU General Public License

Java Source Code

package gyu.geekyouup.android.widgets.battery;
/*from  w  w w . j a va2s .  c  om*/
import android.app.PendingIntent;
import android.app.Service;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.BatteryManager;
import android.os.IBinder;
import android.util.Log;
import android.view.View;
import android.widget.RemoteViews;

/**
 * Define a simple widget that shows a battery meter. To build
 * an update we spawn a background {@link Service} to perform the API queries.
 */
public class BatteryWidget extends AppWidgetProvider {
  
  public static final String LOG_TAG = BatteryWidget.class.getSimpleName();
  //public static final int SDK_VERSION = Integer.parseInt(android.os.Build.VERSION.SDK); //1.5 version
  public static final int SDK_VERSION = android.os.Build.VERSION.SDK_INT;
    public static final String KEY_SCALE = "KEY_SCALE";
  public static String PREFS_NAME="BATWIDG_PREFS";
  public static String KEY_LEVEL = "BATWIDG_LEVEL";
  public static String KEY_CHARGING = "BATWIDG_CHARGING";
  public static String KEY_VOLTAGE = "BATWIDG_VOLTAGE";
  
  @Override
  public void onEnabled(Context context) {
    super.onEnabled(context);
    BatteryWidget.clearSettings(context);
  }
  
  @Override
  public void onDisabled(Context context) {
    super.onDisabled(context);
    try
    {
      context.stopService(new Intent(context, UpdateService.class));//unregisterReceiver(mBI);
    }catch(Exception e){Log.d("BatteryWidget","Exception on disable: ",e);}
    BatteryWidget.clearSettings(context);
  }
  
  @Override
  public void onDeleted(Context context, int[] appWidgetIds) {
    super.onDeleted(context, appWidgetIds);
    try
    {
      context.stopService(new Intent(context, UpdateService.class));//if(mBI != null) context.unregisterReceiver(mBI);
    }catch(Exception e){Log.d("BatteryWidget","Exception on delete: ",e);}
  }
  
    @Override
    public void onUpdate(Context context, AppWidgetManager appWidgetManager,int[] appWidgetIds) {
        // To prevent any ANR timeouts, we perform the update in a service
      context.startService(new Intent(context, UpdateService.class));
    }
    
    private static void clearSettings(Context context) {
        if (context != null)
        {
            SharedPreferences settings = context.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
            Editor editor = settings.edit();
            editor.remove(KEY_LEVEL);
            editor.remove(KEY_CHARGING);
            editor.remove(KEY_SCALE);
            editor.commit();
        }
    }
    
    public static class UpdateService extends Service {
      
      BatteryInfo mBI = null;

      @Override
        public void onStart(Intent intent, int startId) {
          
      if(mBI == null)
          {
            mBI = new BatteryInfo();
            IntentFilter mIntentFilter = new IntentFilter();
              mIntentFilter.addAction(Intent.ACTION_BATTERY_CHANGED);
              registerReceiver(mBI, mIntentFilter);
          }
          
          // Build the widget update for today
          RemoteViews updateViews = buildUpdate(this);
            if(updateViews != null)
            {
              try
              {
                // Push update for this widget to the home screen
                ComponentName thisWidget = new ComponentName(this, BatteryWidget.class);
                if(thisWidget != null)
                {
                  AppWidgetManager manager = AppWidgetManager.getInstance(this);
                  if(manager != null && updateViews != null)
                  {
                    manager.updateAppWidget(thisWidget, updateViews);
                  }
                }
                
                //stop the service, clear up memory, can't do this, need the Broadcast Receiver running
                //stopSelf();
              }catch(Exception e)
              {
                Log.e("Widget", "Update Service Failed to Start", e);
              }
            }
        }

      @Override
      public void onDestroy() {
        super.onDestroy();
        try{
          if(mBI != null) unregisterReceiver(mBI);
        }catch(Exception e)
        {Log.e("Widget", "Failed to unregister", e);}
      }
      
        /**
         * Build a widget update to show the current Wiktionary
         * "Word of the day." Will block until the online API returns.
         */
        public RemoteViews buildUpdate(Context context) {           
            // Build an update that holds the updated widget contents
            RemoteViews updateViews = new RemoteViews(context.getPackageName(), R.layout.widget);
            try
            {
              //Log.d("BatteryWidget","Updating Views");
              int level = 0;
              boolean charging = false;
              SharedPreferences settings = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
              if(settings !=null)
              {
                level = settings.getInt(KEY_LEVEL, 0);
                
                //update level based on scale
                int scale = settings.getInt(KEY_SCALE, 100);
                if(scale != 100)
                {
                  if (scale <= 0) scale = 100;
                  level = (100 * level) / scale;
                }
                
                charging = (settings.getInt(KEY_CHARGING, BatteryManager.BATTERY_STATUS_UNKNOWN)==BatteryManager.BATTERY_STATUS_CHARGING);
              }
              
              if(level>20)
              {
                updateViews.setViewVisibility(R.id.bar100, level>80?View.VISIBLE:View.INVISIBLE);
                updateViews.setViewVisibility(R.id.bar80, level>60?View.VISIBLE:View.INVISIBLE);
                updateViews.setViewVisibility(R.id.bar60, level>40?View.VISIBLE:View.INVISIBLE);
                updateViews.setViewVisibility(R.id.bar40, level>20?View.VISIBLE:View.INVISIBLE);
                updateViews.setViewVisibility(R.id.bar20, View.VISIBLE);
                updateViews.setImageViewResource(R.id.bar20, R.drawable.bar_green);
                
                updateViews.setViewVisibility(R.id.batterytext, View.VISIBLE);
              }else
              {
                updateViews.setViewVisibility(R.id.bar100, View.INVISIBLE);
                updateViews.setViewVisibility(R.id.bar80, View.INVISIBLE);
                updateViews.setViewVisibility(R.id.bar60, View.INVISIBLE);
                updateViews.setViewVisibility(R.id.bar40, View.INVISIBLE);
                updateViews.setViewVisibility(R.id.bar20, View.VISIBLE);
                updateViews.setImageViewResource(R.id.bar20, R.drawable.bar_red);
                updateViews.setViewVisibility(R.id.batterytext, View.VISIBLE);
              }
  
              updateViews.setViewVisibility(R.id.charging, charging?View.VISIBLE:View.INVISIBLE);
              
              String levelText = level==100?"100":level+"%"; //100% too wide
              if(level == 0) levelText=" 0%";
              updateViews.setTextViewText(R.id.batterytext, levelText);
          }catch(Exception e)
          {
            Log.e("BatteryWidget","Error Updating Views",e);
          }
            
        try
        {
              Intent defineIntent2 = new Intent(context,TranslucentBlurActivity.class);
              PendingIntent pendingIntent2 = PendingIntent.getActivity(context,0 /* no requestCode */, defineIntent2, 0 /* no flags */);
              updateViews.setOnClickPendingIntent(R.id.widget, pendingIntent2);
        }catch(Exception e)
        {
          Log.e("BatteryWidget","Error Settings Intents",e);
        }
            
            return updateViews;
        }
        
        @Override public IBinder onBind(Intent intent) {return null;}
    }

}

Java Source Code List

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