Note:
When the internal storage space is insufficient, do not load wallpaper to save resources.
Method of modification: modify the content in wallpapermanagerservice. java. Train of Thought: Before loading the wallpaper, we need to determine whether the current storage space is insufficient. The Code is as follows: (Source Code address)
Public Boolean isstoragelow () {try {If (mipackagemanager! = NULL) {return mipackagemanager. isstoragelow ();}
} Catch (RemoteException e) {} return false ;}
Boolean
Bindwallpapercomponentlocked(Componentname, Boolean force,
0813 Boolean fromuser, wallpaperdata wallpaper, iremotecallback reply ){
0814 if (Debug) slog. V (TAG, "bindwallpapercomponentlocked: componentname =" + componentname );
If (isstoragelow () {return false ;}
0815 // has the component changed?
0816 if (! Force ){
0817 if (wallpaper. connection! = NULL ){
0818 if (wallpaper. wallpapercomponent = NULL ){
0819 if (componentname = NULL ){
0820 if (Debug) slog. V (TAG, "bindwallpapercomponentlocked: Still using default ");
0821 // still using default wallpaper.
0822 return true;
0823}
0824} else if (wallpaper. wallpapercomponent. Equals (componentname )){
0825 // changing to same wallpaper.
0826 if (Debug) slog. V (TAG, "same wallpaper ");
0827 return true;
0828}
0829}
0830}
0831
0832 try {
0833 if (componentname = NULL ){
0834 string defacomponcomponent =
0835 mcontext. getstring (COM. Android. Internal. R. String. default_wallpaper_component );
0836 if (defacomponcomponent! = NULL ){
0837 // see if there is a default wallpaper component specified
0838 componentname = componentname. unflattenfromstring (defaultcomponent );
0839 if (Debug) slog. V (TAG, "use default component Wallpaper:" + componentname );
0840}
0841 if (componentname = NULL ){
0842 // Fall back to static image Wallpaper
0843 componentname = image_wall paper;
0844 // clearwallpapercomponentlocked ();
0845 // return;
0846 if (Debug) slog. V (TAG, "using image Wallpaper ");
0847}
0848}
0849 int serviceuserid = wallpaper. userid;
0850 serviceinfo Si = mipackagemanager. getserviceinfo (componentname,
0851 packagemanager. get_meta_data | packagemanager. get_permissions, serviceuserid );
0852 if (SI = NULL ){
0853 // The wallpaper component we're trying to use doesn' t exist
0854 slog. W (TAG, "attempted Wallpaper" + componentname + "is unavailable ");
0855 return false;
0856}
0857 if (! Android. manifest. Permission. bind_wallpaper.equals (Si. Permission )){
0858 string MSG = "selected service does not require"
0859 + Android. manifest. Permission. bind_wallpaper
0860 + ":" + componentname;
0861 if (fromuser ){
0862 throw new securityexception (MSG );
0863}
0864 slog. W (TAG, MSG );
0865 return false;
0866}
0867
0868 wallpaperinfo Wi = NULL;
0869
0870 intent = new intent (wallpaperservice. service_interface );
0871 if (componentname! = NULL &&! Componentname. Equals (image_wallpaper )){
0872 // make sure the selected service is actually a wallpaper service.
0873 list <resolveinfo> RIS =
0874 mipackagemanager. queryintentservices (intent,
0875 intent. resolvetypeifneeded (mcontext. getcontentresolver ()),
0876 packagemanager. get_meta_data, serviceuserid );
0877 for (INT I = 0; I <ris. Size (); I ++ ){
0878 serviceinfo RSI = ris. Get (I). serviceinfo;
0879 if (RSI. Name. Equals (Si. Name )&&
0880 RSI. packagename. Equals (Si. packagename )){
0881 try {
0882 Wi = new wallpaperinfo (mcontext, RIS. Get (I ));
0883} catch (xmlpullparserexception e ){
0884 if (fromuser ){
0885 throw new illegalargumentexception (E );
0886}
0887 slog. W (TAG, e );
0888 return false;
0889} catch (ioexception e ){
0890 if (fromuser ){
0891 throw new illegalargumentexception (E );
0892}
0893 slog. W (TAG, e );
0894 return false;
0895}
0896 break;
0897}
0898}
0899 if (Wi = NULL ){
0900 string MSG = "selected service is not a wallpaper :"
0901 + componentname;
0902 if (fromuser ){
0903 throw new securityexception (MSG );
0904}
0905 slog. W (TAG, MSG );
0906 return false;
0907}
0908}
0909
0910 // bind the service!
0911 if (Debug) slog. V (TAG, "binding to:" + componentname );
0912 wallpaperconnection newconn = new wallpaperconnection (WI, wallpaper );
0913 intent. setcomponent (componentname );
0914 intent. putextra (intent. extra_client_label,
0915 com. Android. Internal. R. String. wallpaper_binding_label );
0916 intent. putextra (intent. extra_client_intent, pendingintent. getactivityasuser (
0917 mcontext, 0,
0918 intent. createchooser (new intent (intent. action_set_wallpaper ),
0919 mcontext. gettext (COM. Android. Internal. R. String. chooser_wallpaper )),
0920 0, null, new userhandle (serviceuserid )));
0921 if (! Mcontext. bindserviceasuser (intent, newconn,
0922 context. bind_auto_create | context. bind_showing_ui,
0923 new userhandle (serviceuserid ))){
0924 string MSG = "unable to bind Service :"
0925 + componentname;
0926 if (fromuser ){
0927 throw new illegalargumentexception (MSG );
0928}
0929 slog. W (TAG, MSG );
0930 return false;
0931}
0932 if (wallpaper. userid = mcurrentuserid & mlastwallpaper! = NULL ){
0933 detachwallpaperlocked (mlastwallpaper );
0934}
0935 wallpaper. wallpapercomponent = componentname;
0936 wallpaper. Connection = newconn;
0937 wallpaper. lastdiedtime = systemclock. uptimemillis ();
0938 newconn. mreply = reply;
0939 try {
0940 if (wallpaper. userid = mcurrentuserid ){
0941 if (Debug)
0942 slog. V (TAG, "adding window token:" + newconn. mtoken );
0943 miwindowmanager. addwindowtoken (newconn. mtoken,
0944 windowmanager. layoutparams. type_wallpaper );
0945 mlastwallpaper = wallpaper;
0946}
0947} catch (RemoteException e ){
0948}
0949} catch (RemoteException e ){
0950 string MSG = "remote exception for" + componentname + "\ n" + E;
0951 if (fromuser ){
0952 throw new illegalargumentexception (MSG );
0953}
0954 slog. W (TAG, MSG );
0955 return false;
0956}
0957 return true;
0958}
Note!
The red part adds code.
Solve the shortage of internal storage space, do not load desktop wallpaper, desktop wallpaper display
