content: package com.rsen.github.androidutilcode;
  
  import android.content.Context;
  import android.content.Intent;
  import android.os.Bundle;
  
  /**
   * <pre>
   *     author: Blankj
   *     blog  : http://blankj.com
   *     time  : 2016/9/23
   *     desc  : Activity相关工具类
   * </pre>
   */
  public class ActivityUtils {
  
      private ActivityUtils() {
          throw new UnsupportedOperationException("u can't instantiate me...");
      }
  
      /**
       * 判断是否存在Activity
       *
       * @param context     上下文
       * @param packageName 包名
       * @param className   activity全路径类名
       * @return {@code true}: 是<br>{@code false}: 否
       */
      public static boolean isActivityExists(Context context, String packageName, String className) {
          Intent intent = new Intent();
          intent.setClassName(packageName, className);
          return !(context.getPackageManager().resolveActivity(intent, 0) == null ||
                  intent.resolveActivity(context.getPackageManager()) == null ||
                  context.getPackageManager().queryIntentActivities(intent, 0).size() == 0);
      }
  
      /**
       * 打开Activity
       *
       * @param context     上下文
       * @param packageName 包名
       * @param className   全类名
       */
      public static void launchActivity(Context context, String packageName, String className) {
          launchActivity(context, packageName, className, null);
      }
  
      /**
       * 打开Activity
       *
       * @param context     上下文
       * @param packageName 包名
       * @param className   全类名
       * @param bundle      bundle
       */
      public static void launchActivity(Context context, String packageName, String className, Bundle bundle) {
          context.startActivity(IntentUtils.getComponentIntent(packageName, className, bundle));
      }
  }
  