Using the Java reflection mechanism, use the internal class member functions of the android System

// Access an attribute

　　　　　　　　　　　　Context mmsCtx = createPackageContext("com.android.lockscreen",          Context.CONTEXT_INCLUDE_CODE | Context.CONTEXT_IGNORE_SECURITY);  Class<?> maClass = Class.forName("com.android.lockscreen.LockScreenActivity", true, mmsCtx.getClassLoader());  Object maObject = maClass.newInstance();Field f_mPm = maClass.getDeclaredField("TAG");  f_mPm.setAccessible(true);              Log.i(LOG_TAG, "___________________________________________obj:"+f_mPm.get(maObject));

　　

// Access method

// Access try {context mmsctx = createpackagecontext ("com. Android. lockscreen", context. context_include_code | context. context_ignore_security); Class <?> Maclass = Class. forname ("com. android. lockscreen. lockscreenactivity ", true, mmsctx. getclassloader (); object maobject = maclass. newinstance (); field f_mpm = maclass. getdeclaredfield ("tag"); // maclass. getdeclaredmethod ("", parametertypes); f_mpm.setaccessible (true); log. I (log_tag, "_______________________________________________ OBJ:" + f_mpm.get (maobject); Class [] Resource = new class [] {context. class}; object [] resourceobj = new object [] {mmsctx}; Method addsmethod = maclass. getdeclaredmethod ("getlockscreenview", resource); addsmethod. setaccessible (true); view addsresult = (View) addsmethod. invoke (maobject, resourceobj); log. I (log_tag, "_______________________________________________ addsresult:" + addsresult);} catch (exception e) {// todo auto-generated catch blocke. printstacktrace ();} // defines the public class lockscreenactivity extends activity {private string tag = "lockscreenactivity"; // Private lockscreen mscreen = new lockscreen (lockscreenactivity. this); Private lockscreen getlockscreenview (context) {log. I (TAG, "_____________________________________________ context:" + context); return New lockscreen (context );}}

　　

// Obtain the setting package's context mmsctx = createpackagecontext ("com. android. settings ", context. context_include_code | context. context_ignore_security); // use setting's classloader to load COM. android. settings. manageapplications class <?> Maclass = Class. forname ("com. android. settings. manageapplications ", true, mmsctx. getclassloader (); // creates an object named maobject = maclass. newinstance ();/** assign values to the private domain MPM. Because MPM is used in invokegetsize of sizeobserver, * Initialization is required because oncreate is not executed and not initialized. */Field f_mpm = maclass. getdeclaredfield ("MPM"); f_mpm.setaccessible (true); f_mpm.set (maobject, mmsctx. getpackagemanager ());