Android编程实现任务管理器的方法

/* * 获取所有进程及用户 的进程 */protected void initData() {  runningAppProcessInfos =ActivityManager.getRunningAppProcesses(); //获取所有的进程  userRunningAppProcessInfos = new ArrayList<ActivityManager.RunningAppProcessInfo>();//获取用户的进程  for(int i = 0; i< runningAppProcessInfos.size();i++){     if("system".equals(runningAppProcessInfos.get(i).processName)    ||"android.process.media".equals(runningAppProcessInfos.get(i).processName)    ||"android.process.acore".equals(runningAppProcessInfos.get(i).processName)    ){       continue;     }     userRunningAppProcessInfos.add(runningAppProcessInfos.get(i));  }}

/* * 获取某个进程占用的内存信息 */ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);int[] pids = {userRunningAppProcessInfos.get(position).pid};android.os.Debug.MemoryInfo[] memoryInfos = am.getProcessMemoryInfo(pids);int memorysize = memoryInfos[0].getTotalPrivateDirty();tv_app_memory.setText("内存占用为 "+ memorysize +" KB");

public class TaskInfo {  Context context ;  PackageManager pm ;  public TaskInfo(Context context) {    this.context = context;    pm = context.getPackageManager();  }  /*   * 根据包名 查询 图标   */  public Drawable getAppIcon(String packname){   try {       ApplicationInfo info = pm.getApplicationInfo(packname, 0);       return info.loadIcon(pm);    } catch (NameNotFoundException e) {      // TODO Auto-generated catch block      e.printStackTrace();      return null;    }  }  /*   *获取程序的版本号   */  public String getAppVersion(String packname){     try {       PackageInfo packinfo =  pm.getPackageInfo(packname, 0);       return packinfo.versionName;      } catch (NameNotFoundException e) {        e.printStackTrace();        return null;      }  }  /*   * 获取程序的名字   */  public String getAppName(String packname){     try {         ApplicationInfo info = pm.getApplicationInfo(packname, 0);         return info.loadLabel(pm).toString();      } catch (NameNotFoundException e) {        // TODO Auto-generated catch block        e.printStackTrace();        return null;      }  }  /*   * 获取程序的权限   */  public String[] getAppPremission(String packname){     try {       PackageInfo packinfo =  pm.getPackageInfo(packname, PackageManager.GET_PERMISSIONS);       //获取到所有的权限       return packinfo.requestedPermissions;      } catch (NameNotFoundException e) {        e.printStackTrace();        return null;      }  }  /*   * 获取程序的签名   */  public String getAppSignature(String packname){     try {       PackageInfo packinfo =  pm.getPackageInfo(packname, PackageManager.GET_SIGNATURES);       //获取到所有的权限       return packinfo.signatures[0].toCharsString();      } catch (NameNotFoundException e) {        e.printStackTrace();        return null;      }  }}

/* * 杀死所有进程 */private void killAll() {  for (int i = 0 ; i< userRunningAppProcessInfos.size();i++){    System.out.println(userRunningAppProcessInfos.get(i).processName);    activitymanager.restartPackage(userRunningAppProcessInfos.get(i).processName);  }  // 更新显示的界面  pd.show();  new Thread(){    @Override    public void run() {      initData();      Message msg = new Message();      msg.what = GET_RUNNING_APP_FINISH;      hander.sendMessage(msg);    }  }.start();}/* * 杀死选择的进程 */private void killSelected() {  for (int i=0 ;i < isselected.size(); i++){    if(isselected.get(i)){  //如果用户也选中则返回true      //终止一个activity 需要用到 activitymanager      activitymanager.restartPackage(userRunningAppProcessInfos.get(i).processName);    }  }  //更新listview的显示  pd.show();  new Thread(){    @Override    public void run() {      initData();      Message msg = new Message();      msg.what = GET_RUNNING_APP_FINISH;      hander.sendMessage(msg);    }  }.start();}

/* * 获取系统的剩余内存 */ActivityManager am = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);MemoryInfo outInfo =  new ActivityManager.MemoryInfo();am.getMemoryInfo(outInfo);long availMemorySize = outInfo.availMem;String strMemorySize = availMemorySize/1024/1024 + "MB";