有意思的android应用需求

a，之前有个客户的需求特别怪，要求应用不在全部应用程序列表里显示，通过拨打指定的电话号码形式启动应用，开始的想发就是在manifest.xml里的第一个activity里不添加<action android:name="android.intent.action.MAIN" />    <category android:name="android.intent.category.LAUNCHER" />这两个intentfilter。发现在4.0以上的版本就会出现错误！4.0会认为你这个是不安全的信息，无法启动。后来在PackageManager里发现了setComponentEnabledSetting这个方法，可以达到效果！看代码吧！

              
              
              
              

               
               
               
               
//隐藏效果 
               
               
               
               
PackageManager p = getPackageManager(); 
               
               
               
               
p.setComponentEnabledSetting(getComponentName(), PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);
              
              
              
              
//重新显示效果
               
               
               
               

                
                
                
                
PackageManager p = getPackageManager(); 
                
                
                
                
p.setComponentEnabledSetting(getComponentName(), PackageManager.COMPONENT_ENABLED_STATE_ENABLED, PackageManager.DONT_KILL_APP);
               
               
               
               

转：http://blog.csdn.net/commonslok/article/details/8148810

b，获得所有开机运行的应用

   1:  static final String BOOT_START_PERMISSION = "android.permission.RECEIVE_BOOT_COMPLETED";

   2:   

   3:      public List<Map<String,Object>> fetch_installed_apps(Context context)

   4:      {

   5:          List<ApplicationInfo> packages = context.getPackageManager().getInstalledApplications(0);

   6:          List<Map<String, Object>>list = new ArrayList<Map<String,Object>>(packages.size());

   7:          Iterator<ApplicationInfo> appInfoIterator = packages.iterator();

   8:   

   9:          while(appInfoIterator.hasNext())

  10:          {

  11:              ApplicationInfo app = (ApplicationInfo) appInfoIterator.next();

  12:              // 查找安装的package是否有开机启动权限

  13:              if(PackageManager.PERMISSION_GRANTED == context.getPackageManager().checkPermission(BOOT_START_PERMISSION, app.packageName))

  14:              {

  15:                  String label = context.getPackageManager().getApplicationLabel(app).toString();

  16:                  Drawable appIcon = context.getPackageManager().getApplicationIcon(app);

  17:                  Map<String,Object> map = new HashMap<String,Object>();

  18:                  map.put("name", label);

  19:                  map.put("desc", app.packageName);

  20:                  map.put("img", appIcon);

  21:                  list.add(map);

  22:              }

  23:          }

  24:          return list;

  25:      }