Android Open Source - shakabuku Widget Provider

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License

The source code is released under:

Copyright (c) 2012 Darren Hinderer The voodoo doll icon is free for personal use only and is not mine to copyright. http://www.softicons.com/free-icons/web-icons/halloween-avatars-icons-by-deleket/vo...

Java Source Code

package com.shakabuku;
//from  w  w  w .  j a  v  a  2 s .c  om
import java.lang.reflect.Method;
import java.util.List;

import android.app.ActivityManager;
import android.app.IntentService;
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.content.pm.PackageManager.NameNotFoundException;
import android.graphics.Bitmap;
import android.graphics.drawable.BitmapDrawable;
import android.os.Build;
import android.os.Handler;
import android.util.Log;
import android.widget.RemoteViews;
import android.widget.Toast;

public class WidgetProvider extends AppWidgetProvider
{

  @Override
  public void onUpdate(Context context, AppWidgetManager appWidgetManager, int[] appWidgetIds)
  {
    // This called whenever the home screen wants a refresh (like device boot-up).
    for (int i = 0; i < appWidgetIds.length; i++)
    {
      Intent intent = new Intent(context, WidgetService.class);
      intent.setAction(WidgetService.ACTION_UPDATE_DISPLAY);
      intent.putExtra(WidgetService.EXTRA_WIDGET_ID, appWidgetIds[i]);
      context.startService(intent);
    }
  }

  public static class WidgetService extends IntentService
  {
    public static final String ACTION_UPDATE_DISPLAY = "display";
    public static final String ACTION_CLICK = "click";
    public static final String ACTION_INSTALL = "install";
    
    public static final String EXTRA_WIDGET_ID = "widget_id";
    public static final String EXTRA_COMPONENT_NAME = "componentName";
    
    private static final String TAG = WidgetService.class.getSimpleName();
    private static final String PREFS_NAME = "shakabuku";
    private static final String PREF_PREFIX_PACKAGE = "package_";
    private static final String PREF_PREFIX_CLASS = "class_";
    
    private Handler handler;

    public WidgetService()
    {
      super(TAG);
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId)
    {
      handler = new Handler();
      return super.onStartCommand(intent, flags, startId);
    }

    @SuppressWarnings("deprecation")
    @Override
    protected void onHandleIntent(Intent intent)
    {
      String action = intent.getAction();
      int widgetId = intent.getIntExtra(EXTRA_WIDGET_ID, -1);
      
      Log.d(TAG, "got intent action:" + action + " id:" + widgetId);
      
      if (action.equals(ACTION_INSTALL))
      {
        installWidget(intent, widgetId);
        return;
      }

      SharedPreferences prefs = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
      String packageName = prefs.getString(PREF_PREFIX_PACKAGE + widgetId, null);
      String className = prefs.getString(PREF_PREFIX_CLASS + widgetId, null);
      Log.d(TAG, "packageName:" + packageName + " className:" + className);
      
      if (packageName == null || className == null)
        return;
      
      Bitmap appIcon = getAppBitmap(packageName, className);
      
      if (intent.getAction().equals(ACTION_UPDATE_DISPLAY))
      {
        AppWidgetManager.getInstance(this).updateAppWidget(widgetId, buildUpdate(this, widgetId, appIcon));
      }
      else if (intent.getAction().equals(ACTION_CLICK))
      {
        // Show red eyes
        AppWidgetManager.getInstance(this).updateAppWidget(widgetId, buildRedEyes(this));
        
        // Show toast with UI thread
        handler.post(new Runnable()
        {
          public void run()
          {
            Toast.makeText(getApplicationContext(), "Shakabuku!", Toast.LENGTH_SHORT).show();
          }
        });

        ActivityManager am = ((ActivityManager)getSystemService(Context.ACTIVITY_SERVICE));
        
        
        if (Build.VERSION.SDK_INT >= 8)
        {
          try
          {
            Method killBackgroundProcesses = ActivityManager.class.getMethod("killBackgroundProcesses", String.class);
            killBackgroundProcesses.invoke(am, packageName);
          }
          catch(Exception e)
          {
            Log.e(TAG, "Couldn't kill the process", e);
          }
        }
        else
        {
          // Restart package restarts the application processes
          am.restartPackage(packageName);
        }

        // Briefly wait so the user can see red eyes
        try
        {
          Thread.sleep(1000);
        }
        catch (InterruptedException e)
        {
        }

        // Launch the app
        launchFromRecentTasks(am, packageName);
        
        // Back to white eyes
        AppWidgetManager.getInstance(this).updateAppWidget(widgetId, buildUpdate(this, widgetId, appIcon));
      }
    }

    public RemoteViews buildRedEyes(Context context)
    {
      RemoteViews views = new RemoteViews(getPackageName(), R.layout.widget);
      views.setImageViewResource(R.id.icon, R.drawable.voodoo_red);
      return views;
    }

    public RemoteViews buildUpdate(Context context, int widgetId, Bitmap appIcon)
    {
      RemoteViews views = new RemoteViews(getPackageName(), R.layout.widget);

      Intent future = new Intent(context, WidgetService.class);
      future.setAction(ACTION_CLICK);
      future.putExtra(EXTRA_WIDGET_ID, widgetId);
      PendingIntent pendingIntent = PendingIntent.getService(context, widgetId, future, 0);
      views.setOnClickPendingIntent(R.id.widget, pendingIntent);
      views.setImageViewResource(R.id.icon, R.drawable.voodoo);
      views.setImageViewBitmap(R.id.mini_icon, appIcon);
      return views;
    }
    
    private void installWidget(Intent intent, int widgetId)
    {
      ComponentName component = intent.getParcelableExtra(EXTRA_COMPONENT_NAME);
      
      SharedPreferences prefs = getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
      prefs.edit().putString(PREF_PREFIX_PACKAGE  + widgetId, component.getPackageName()).commit();
      prefs.edit().putString(PREF_PREFIX_CLASS + widgetId, component.getClassName()).commit();
      
      Bitmap appIcon = getAppBitmap(component.getPackageName(), component.getClassName());
      AppWidgetManager.getInstance(this).updateAppWidget(widgetId, buildUpdate(this, widgetId, appIcon));
    }
    
    private Bitmap getAppBitmap(String packageName, String className)
    {
      try
      {
        BitmapDrawable appIcon = (BitmapDrawable)getPackageManager().getActivityIcon(new ComponentName(packageName, className));
        return appIcon.getBitmap();
      }
      catch (NameNotFoundException e1)
      {
      }
      return null;
    }
    
    private void launchFromRecentTasks(ActivityManager am, String packageName)
    {
      List<ActivityManager.RecentTaskInfo> recentTaskList = am.getRecentTasks(30, 0);

      for (int i = 0; i < recentTaskList.size(); i++)
      {
        ActivityManager.RecentTaskInfo recentTaskInfo = recentTaskList.get(i);
        if (packageName.equals(recentTaskInfo.baseIntent.getComponent().getPackageName()))
        {
          recentTaskInfo.baseIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
          startActivity(recentTaskInfo.baseIntent);
          break;
        }
      }
    }
  }
}

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