获取Android系统正在运行的线程

private void getTaskInfos() {
        PackageManager manager = getPackageManager();

        for (RunningAppProcessInfo app : processes) {
            try {
                TaskInfo taskInfo = new TaskInfo();
                // 获取包名
                String processName = app.processName;
                taskInfo.setPackagename(processName);

                // 获取占用内存
                android.os.Debug.MemoryInfo[] memoryInfos = activityManager
.getProcessMemoryInfo(new int[] { app.pid });
                long memsize = memoryInfos[0].getTotalPrivateDirty() * 1024;
                String memory = Formatter.formatFileSize(this, memsize);
                taskInfo.setMemory(memory);

                // 获取进程icon name
                ApplicationInfo applicationInfo = manager.getApplicationInfo(
                        processName, 0);
                Drawable icon = applicationInfo.loadIcon(manager);
                String name = applicationInfo.loadLabel(manager).toString();
                taskInfo.setIcon(icon);
                taskInfo.setName(name);

                if ((applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) == 0) {
                    // 用户进程
                    taskInfo.setUserTask(true);
                    userTaskInfos.add(taskInfo);
                } else {
                    // 系统进程
                    taskInfo.setUserTask(false);
                    systemTaskInfos.add(taskInfo);
                }

            } catch (NameNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
                System.out.println(app.processName + "这是异常");
            }
        }
    }