[Android] 大佬们帮我看一下这段 xposed 代码有没有问题

   public class HookInit implements IXposedHookLoadPackage {

          @Override
          public void handleLoadPackage ( final XC_LoadPackage.LoadPackageParam lpparam ) throws Throwable {

                    XposedHelpers.findAndHookMethod ( "android.app.ContextImpl", lpparam.classLoader, "checkCallingOrSelfPermission", String.class, new XC_MethodReplacement ( ){

                                   @Override
                                   protected Object replaceHookedMethod ( XC_MethodHook.MethodHookParam p1 ) throws Throwable {
                                             int i=0;
                                             return i;
                                        }                                     
                              }                  
                    );

                    XposedHelpers.findAndHookMethod ( "android.app.Application", lpparam.classLoader, "attach", Context.class, new XC_MethodHook ( ){
                                   @Override
                                   protected void afterHookedMethod ( MethodHookParam param ) throws Throwable {
                                             Class <?>wmg=XposedHelpers.findClass ( "android.view.WindowManagerGlobal", lpparam.classLoader );
                                             final Object wm=XposedHelpers.callStaticMethod ( wmg, "getWindowManagerService" );
                                             Method setForcedDisplayDensityForUser=XposedHelpers.findMethodBestMatch ( wm.getClass ( ), "setForcedDisplayDensityForUser", int.class, int.class, int.class );
                                             setForcedDisplayDensityForUser.invoke ( wm, 160, Display.DEFAULT_DISPLAY, AndroidAppHelper.currentApplicationInfo ( ).uid );
                                        }
                              }
                    );
               }
     }

目的是想通过 WindowManagerGlobal 获取 WindowManagerService ，然后调用 setForcedDisplayDensityForUser 方法，因为这个方法会用 checkCallingOrSelfPermission 方法检查是否有权限，所以我修改了他的返回值为 0 。 setForcedDisplayDensityForUser 的源码：

 @Override
    public void setForcedDisplayDensityForUser(int displayId, int density, int userId) {
        if (mContext.checkCallingOrSelfPermission(
                android.Manifest.permission.WRITE_SECURE_SETTINGS) !=
                PackageManager.PERMISSION_GRANTED) {
            throw new SecurityException("Must hold permission " +
                    android.Manifest.permission.WRITE_SECURE_SETTINGS);

但这样修改后还是抛出异常"Must hold permission…" 大佬们有没有什么建议