Determines if this application is top activity - Android android.app

Android examples for android.app:Activity

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Description

Determines if this application is top activity

Demo Code

import java.util.List;

import android.app.ActivityManager;
import android.app.ActivityManager.RunningTaskInfo;
import android.content.ComponentName;
import android.content.Context;

public class Main {

  /**/*  w w w  .  j  a  v  a 2s.  c  o m*/
   * Determines if this application is top activity
   * 
   * @param context
   *          Context to be examined
   * @return true if this application is a top activity; false otherwise
   */
  public static boolean isTopApplication(Context context) {
    ComponentName activity = getTopActivity(context);
    if (activity == null) {
      return false;
    }
    return activity.getPackageName().equals(context.getApplicationInfo().packageName);
  }

  private static ComponentName getTopActivity(Context context) {
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    if (am == null) {
      return null;
    }
    List<RunningTaskInfo> info = am.getRunningTasks(1);
    if (info == null) {
      return null;
    }
    ComponentName activity = info.get(0).topActivity;
    return activity;
  }

}

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