SoundCloud downloader

package com.stirante.soundcloudmodule;

import android.app.Application;
import android.app.DownloadManager;
import android.content.Context;
import android.net.Uri;
import android.os.Build;
import android.os.Environment;
import android.view.MenuItem;
import android.widget.PopupMenu;
import android.widget.Toast;

import java.io.File;

import de.robv.android.xposed.IXposedHookLoadPackage;
import de.robv.android.xposed.XC_MethodHook;
import de.robv.android.xposed.XposedBridge;
import de.robv.android.xposed.XposedHelpers;
import de.robv.android.xposed.callbacks.XC_LoadPackage;

/**
 * Created by stirante
 */
public class XposedMain implements IXposedHookLoadPackage {

    private Object urlBuilder;

    public static final File DEFAULT_DIR = new File(Environment.getExternalStorageDirectory() + "/SoundCloud files/");

    public static void download(String src, String title, String creator, Context context) {
        File dst = new File(DEFAULT_DIR, creator + "/" + title + ".mp3");
        if (dst.exists()) dst.delete();
        DownloadManager.Request request = new DownloadManager.Request(Uri.parse(src));
        request.setTitle("Downloading " + creator + " - " + title);
        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) {
            request.allowScanningByMediaScanner();
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
        }
        request.setDestinationUri(Uri.fromFile(dst));
        DownloadManager manager = (DownloadManager) context.getSystemService(Context.DOWNLOAD_SERVICE);
        manager.enqueue(request);
    }
    @Override
    public void handleLoadPackage(final XC_LoadPackage.LoadPackageParam packageParam) throws Throwable {
        if (packageParam.packageName.equalsIgnoreCase("com.soundcloud.android")) {
            XposedBridge.log("In SoundCloud");
            XposedHelpers.findAndHookMethod(Application.class, "attach", Context.class, new XC_MethodHook() {
                @Override
                protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                    final Context ctx = (Context) param.args[0];
                    XposedHelpers.findAndHookMethod("com.soundcloud.android.playback.ui.TrackPageMenuController", packageParam.classLoader, "setupMenu", new XC_MethodHook() {
                        @Override
                        protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                            PopupMenu menu = (PopupMenu) XposedHelpers.getObjectField(XposedHelpers.getObjectField(param.thisObject, "popupMenuWrapper"), "popupMenu");
                            menu.getMenu().add("Download");
                        }
                    });
                    XposedHelpers.findAndHookMethod("com.soundcloud.android.playback.ui.TrackPageMenuController", packageParam.classLoader, "onMenuItemClick", XposedHelpers.findClass("android.view.MenuItem", packageParam.classLoader), XposedHelpers.findClass("android.content.Context", packageParam.classLoader), new XC_MethodHook() {
                        @Override
                        protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                            MenuItem item = (MenuItem) param.args[0];
                            if (item.getTitle().toString().equalsIgnoreCase("Download")) {
                                Object urn = XposedHelpers.callMethod(XposedHelpers.getObjectField(param.thisObject, "track"), "getUrn");
                                String title = (String) XposedHelpers.callMethod(XposedHelpers.getObjectField(param.thisObject, "track"), "getTitle");
                                String creator = (String) XposedHelpers.callMethod(XposedHelpers.getObjectField(param.thisObject, "track"), "getUserName");
                                if (urlBuilder != null) {
                                    String url = (String) XposedHelpers.callMethod(urlBuilder, "buildHttpsStreamUrl", new Class[]{XposedHelpers.findClass("com.soundcloud.android.model.Urn", packageParam.classLoader)}, urn);
                                    download(url, title, creator, ctx);
                                }
                                else {
                                    Toast.makeText(ctx, "Failed to download!", Toast.LENGTH_SHORT).show();
                                }
                                param.setResult(true);
                            }
                        }
                    });
                    XposedHelpers.findAndHookConstructor("com.soundcloud.android.playback.StreamUrlBuilder", packageParam.classLoader, XposedHelpers.findClass("com.soundcloud.android.accounts.AccountOperations", packageParam.classLoader), XposedHelpers.findClass("com.soundcloud.android.api.ApiUrlBuilder", packageParam.classLoader), new XC_MethodHook() {
                        @Override
                        protected void afterHookedMethod(MethodHookParam param) throws Throwable {
                            urlBuilder = param.thisObject;
                        }
                    });
                }
            });
        }
    }
}