private boolean getIsMIUI(){
String KEY_MIUI_VERSION_CODE = "ro.miui.ui.version.code"; 
String KEY_MIUI_VERSION_NAME = "ro.miui.ui.version.name"; 
String KEY_MIUI_INTERNAL_STORAGE = "ro.miui.internal.storage"; 

Properties prop= new Properties(); 
boolean isMIUI; 
try { 
prop.load(new FileInputStream(new File(Environment.getRootDirectory(), "build.prop"))); 
} catch (IOException e) 
{ 
e.printStackTrace(); 
return false; 
} 

isMIUI= prop.getProperty(KEY_MIUI_VERSION_CODE, null) != null

|| prop.getProperty(KEY_MIUI_VERSION_NAME, null) != null

|| prop.getProperty(KEY_MIUI_INTERNAL_STORAGE, null) != null; 

return isMIUI; 
}