Android ActivityManager

获取Activity管理器

//获取活动管理器
ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);

• 获取正在运行的服务,传0参数表示获取的服务的最大数

  List<RunningServiceInfo> runningServices = am.getRunningServices(1000);
  for (RunningServiceInfo runningServiceInfo : runningServices) {
    String className = runningServiceInfo.service.getClassName();
  }

• 2.获取正在运行的进程

  
  List<RunningAppProcessInfo> runningAppProcesses = am.getRunningAppProcesses();
  for (RunningAppProcessInfo runningAppProcessInfo : runningAppProcesses) {

}

- 获取正在运行的任务栈  
传1参数表示最多可以获取多少个正在运行的任务栈
```java
List<RunningTaskInfo> runningTasks = am.getRunningTasks(1);
for (RunningTaskInfo runningTaskInfo : runningTasks) {
    //获取最底部的activity
    ComponentName baseActivity = runningTaskInfo.baseActivity;
    //获取最顶部的activity
    //ComponentName topActivity = runningTaskInfo.topActivity;

    String packageName = baseActivity.getPackageName();
}  

• 获取系统当前的内存
  保存到MemoryInfo

  MemoryInfo outInfo = new MemoryInfo();
  am.getMemoryInfo(outInfo);  

• 杀死后台进程

  List<RunningAppProcessInfo> runningAppProcesses = am.getRunningAppProcesses();
  for (RunningAppProcessInfo runningAppProcessInfo : runningAppProcesses) {
    am.killBackgroundProcesses(runningAppProcessInfo.processName);
  }