应用程序启用Proguard后无应用程序的异常应用程序

Question

这是我的示例代码。当我为我的应用程序启用Proguard时，它会抛出NoSuchMethodException

请查看此代码并帮助我编写Proguard规则。

for (int i = 0; i < packs.size(); i++) {
            PackageInfo p = packs.get(i);
            Method getPackageSizeInfo;
            try {
                getPackageSizeInfo = packageManager.getClass().getMethod("getPackageSizeInfo", String.class,
                        IPackageStatsObserver.class);
                getPackageSizeInfo.invoke(packageManager, p.packageName, new IPackageStatsObserver.Stub() {
                    @Override
                    public void onGetStatsCompleted(PackageStats pStats, boolean succeeded) throws RemoteException {

                        if (!PrefsManager.timeForNewClean(activity)) {
                            mNavCacheSize += cacheInc / 64;
                            mCacheSize += cacheInc / 32;
                        } else {
                            if (pStats.packageName.equals("com.android.browser") || pStats.equals("com.android.chrome")) {
                                mNavCacheSize += pStats.cacheSize;
                            } else {
                                mCacheSize += pStats.cacheSize;
                            }
                        }

                        progress = progress + progressInc;
                        publishProgress();
                        notifyResultToObservers();
                    }
                });
            } catch (NoSuchMethodException e) {
                progress = progress + progressInc;
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                progress = progress + progressInc;
                e.printStackTrace();
            } catch (InvocationTargetException e) {
                progress = progress + progressInc;
                e.printStackTrace();
            } finally {
                publishProgress();
                notifyResultToObservers();
            }
        }

这是我用Proguard运行应用程序时遇到的错误：

W/System.err: java.lang.NoSuchMethodException: getPackageSizeInfo [class java.lang.String, interface android.content.pm.a]