实体类

public class ProcessInfo {
    public String name;
    public String packageName;
    public Drawable icon;
    public long memory;
    public boolean isUser; //true表示用户进程
    public boolean isChecked; //表示当前item是否被勾选
}

获取正在运行的进程列表

public ArrayList<ProcessInfo> getRunningProcesses(Context context) {
    ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
    List<ActivityManager.RunningAppProcessInfo> runningAppProcesses = am
            .getRunningAppProcesses();//获取运行中进程集合

    PackageManager pm = context.getPackageManager();
    ArrayList<ProcessInfo> list = new ArrayList<ProcessInfo>();
    for (ActivityManager.RunningAppProcessInfo runningAppProcessInfo : runningAppProcesses) {
        ProcessInfo info = new ProcessInfo();

        String packageName = runningAppProcessInfo.processName; //包名
        info.packageName = packageName;

        int pid = runningAppProcessInfo.pid;
        Debug.MemoryInfo[] processMemoryInfo = am.getProcessMemoryInfo(new int[]{pid});//根据pid返回内存信息
        long memory = processMemoryInfo[0].getTotalPrivateDirty() * 1024;  //获取当前进程占用内存大小
        info.memory = memory;

        try {
            ApplicationInfo applicationInfo = pm.getApplicationInfo(packageName, 0);//根据包名获取相关应用的信息
            String name = applicationInfo.loadLabel(pm).toString();
            Drawable icon = applicationInfo.loadIcon(pm);

            info.name = name;
            info.icon = icon;

            int flags = applicationInfo.flags;
            if((flags & ApplicationInfo.FLAG_SYSTEM)==ApplicationInfo.FLAG_SYSTEM){
                //系统进程
                info.isUser = false;
            }else{
                //用户进程
                info.isUser = true;
            }

        } catch (PackageManager.NameNotFoundException e) {
            //某些系统进程没有名称和图标,会走此异常
            info.name = packageName;
            info.icon = context.getResources().getDrawable(R.drawable.system_default);
            info.isUser = false;
            e.printStackTrace();
        }

        list.add(info);
    }

    return list;
}