android - uninstall app silently with system privileges -

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my app have system privileges. inside firmware, it's located @ /system/app

i able install apps silently post

install / uninstall apks programmatically (packagemanager vs intents)

example app works

http://paulononaka.wordpress.com/2011/07/02/how-to-install-a-application-in-background-on-android/

but still can't uninstall apps same way. tried use reflection in installation example.

public applicationmanager(context context) throws securityexception, nosuchmethodexception {      observer = new packageinstallobserver();     pm = context.getpackagemanager();      class<?>[] types = new class[] {uri.class, ipackageinstallobserver.class, int.class, string.class};     class<?>[] uninstalltypes = new class[] {string.class, ipackageinstallobserver.class, int.class};     method = pm.getclass().getmethod("installpackage", types);     uninstallmethod = pm.getclass().getmethod("deletepackage", uninstalltypes); }   public void uninstallpackage(string packagename) throws illegalargumentexception, illegalaccessexception, invocationtargetexception {         uninstallmethod.invoke(pm, new object[] {packagename, observer, 0});     }     public void installpackage(uri apkfile) throws illegalargumentexception, illegalaccessexception, invocationtargetexception {         method.invoke(pm, new object[] {apkfile, observer, install_replace_existing, null});     }

i have added uninstallpackage method , edited applicationmanager method. still cant working.

when run method not found (on invoke "deletepackage" line).

here not working project changes: https://dl.dropbox.com/u/1928109/installinbackgroundsample.zip

here description of function: http://www.androidjavadoc.com/1.0_r1_src/android/content/pm/packagemanager.html#deletepackage(java.lang.string, android.content.pm.ipackagedeleteobserver, int)

parameters ok. seems should specify deletepackageobserver class instead of installpackageobserver. don't know how (i don't have such class).

thanks

here how did it:

applicationmanager.java (changed part):

private packageinstallobserver observer; private packagedeleteobserver observerdelete; private packagemanager pm; private method method; private method uninstallmethod;   class packagedeleteobserver extends ipackagedeleteobserver.stub {       public void packagedeleted(string packagename, int returncode) throws remoteexception {         /*if (oninstalledpackaged != null) {             oninstalledpackaged.packageinstalled(packagename, returncode);         }*/     } } public applicationmanager(context context) throws securityexception, nosuchmethodexception {  observer = new packageinstallobserver(); observerdelete = new packagedeleteobserver();  pm = context.getpackagemanager();  class<?>[] types = new class[] {uri.class, ipackageinstallobserver.class, int.class, string.class}; class<?>[] uninstalltypes = new class[] {string.class, ipackagedeleteobserver.class, int.class};      method = pm.getclass().getmethod("installpackage", types);       uninstallmethod = pm.getclass().getmethod("deletepackage", uninstalltypes); } public void uninstallpackage(string packagename) throws illegalargumentexception, illegalaccessexception, invocationtargetexception { uninstallmethod.invoke(pm, new object[] {packagename, observerdelete, 0}); }

packagedeleteobserver.java (in android.content.pm):

package android.content.pm;  public interface ipackagedeleteobserver extends android.os.iinterface {      public abstract static class stub extends android.os.binder implements android.content.pm.ipackagedeleteobserver {         public stub() {             throw new runtimeexception("stub!");         }          public static android.content.pm.ipackagedeleteobserver asinterface(android.os.ibinder obj) {             throw new runtimeexception("stub!");         }          public android.os.ibinder asbinder() {             throw new runtimeexception("stub!");         }          public boolean ontransact(int code, android.os.parcel data, android.os.parcel reply, int flags)                 throws android.os.remoteexception {             throw new runtimeexception("stub!");         }     }      public abstract void packagedeleted(java.lang.string packagename, int returncode)             throws android.os.remoteexception; }

also dont forget add permission manifest:

<uses-permission android:name="android.permission.delete_packages"/>

working sample project (apk need placed in "/system/app" path on device): http://www.mediafire.com/file/no4buw54ed6vuzo/deleteinbackgroundsample.zip


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