ANDROID获取Task及Process

public class MyActivityManager extends ExpandableListActivity {

    private static final String NAME = "NAME";

    private static final String NO_USED = "NO_USED";

    private String[] groups = { "showRecentTask", "showRunningTasks",

            "showRunningAppProcesses", "showRunningServices" };

    private ExpandableListAdapter mAdapter;



    ActivityManager mAm;

    PackageManager mPM;



    @Override

    public void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        mAm = (ActivityManager) this.getSystemService(Context.ACTIVITY_SERVICE);

        mPM = this.getPackageManager();



        List<Map<String, String>> groupData = new ArrayList<Map<String, String>>();

        List<List<Map<String, String>>> childData = new ArrayList<List<Map<String, String>>>();



        for (int i = 0; i < groups.length; i++) {

            if (i == 0) {

                showRecentTask();

            } else if (i == 1) {

                showRunningTasks();

            } else if (i == 2) {

                showRunningAppProcesses();

            } else {

                showRunningServices();

            }



            Map<String, String> curGroupMap = new HashMap<String, String>();

            groupData.add(curGroupMap);

            curGroupMap.put(NAME, groups[i] + "(" + strChildren.size() + ")");

            curGroupMap.put(NO_USED, "");



            List<Map<String, String>> children = new ArrayList<Map<String, String>>();

            for (int j = 0; j < strChildren.size(); j++) {

                Map<String, String> curChildMap = new HashMap<String, String>();

                children.add(curChildMap);

                curChildMap.put(NAME, strChildren.get(j));

                curChildMap.put(NO_USED, "");

            }

            childData.add(children);

        }



        // Set up our adapter

        mAdapter = new SimpleExpandableListAdapter(this, groupData,

                android.R.layout.simple_expandable_list_item_1, new String[] {

                        NAME, NO_USED }, new int[] { android.R.id.text1,

                        android.R.id.text2 }, childData,

                android.R.layout.simple_list_item_1, new String[] { NAME,

                        NO_USED }, new int[] { android.R.id.text1,

                        android.R.id.text2 });

        setListAdapter(mAdapter);

    }



    public List<String> strChildren = new ArrayList<String>();



    // 最近开的task，HOME键长按会看到这个

    public void showRecentTask() {

        List<RecentTaskInfo> taskList = mAm.getRecentTasks(100, 0);

        strChildren.clear();

        for (RecentTaskInfo rti : taskList) {

            ResolveInfo ri = mPM.resolveActivity(rti.baseIntent, 0);

            if (ri != null) {

                Log.e("showRecentTask", "" + ri.loadLabel(mPM));

                strChildren.add(ri.loadLabel(mPM).toString());

            }

        }

    }



    // 运行中的任务

    public void showRunningTasks() {

        List<RunningTaskInfo> taskList = mAm.getRunningTasks(100);

        strChildren.clear();

        for (RunningTaskInfo rti : taskList) {

            Log.e("showRunningTasks", "Running task, numActivities="

                    + rti.numActivities);

            Log.e("showRunningTasks", ", description=" + rti.description);

            Log.e("showRunningTasks",

                    ", baseActivity=" + rti.baseActivity.getClassName());

            Log.e("showRunningTasks",

                    ", topActivity=" + rti.topActivity.getClassName());

            strChildren.add(rti.baseActivity.getClassName());

        }

    }



    // 运行中的作为app容器的process。

    public void showRunningAppProcesses() {

        List<RunningAppProcessInfo> processList = mAm.getRunningAppProcesses();

        strChildren.clear();

        for (RunningAppProcessInfo rapi : processList) {

            Log.e("showRunningAppProcesses", "" + rapi.processName);

            strChildren.add(rapi.processName);

        }

    }



    // 运行中的后台服务

    public void showRunningServices() {

        List<RunningServiceInfo> rsiList = mAm.getRunningServices(100);

        strChildren.clear();

        for (RunningServiceInfo rsi : rsiList) {

            Log.e("showRunningServices", "" + rsi.process);

            strChildren.add(rsi.process);

        }

    }

}