取当前运行Activity的名称

 1     public String getTopActivity()
 2     {
 3         ActivityManager activityManager = (ActivityManager) getApplicationContext().getSystemService(Context.ACTIVITY_SERVICE);
 4         List<RunningTaskInfo> forGroundActivity = activityManager.getRunningTasks(1);
 5         RunningTaskInfo currentActivity;
 6         currentActivity = forGroundActivity.get(0);
 7         String activityName = currentActivity.topActivity.getClassName();
 8 
 9         return activityName;
10         //activity name就是楼主要的
11 
12         //由类名取得改类的对象,并列出声明对象
13         /*
14         Class<?> c = Class.forName(activityName);
15         Method m[] = c.getDeclaredMethods();
16         for (int i = 0; i < m.length; i++)
17             System.out.println(m[i].toString());
18         */
19         //记得在加AndroidManifest.xml中增加权限
20         //<uses-permission android:name="android.permission.GET_TASKS"/>
21     }