UninstallRetainFragment.java

package com.aptoide.amethyst;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.net.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.Fragment;
import android.widget.Toast;

import com.aptoide.amethyst.database.AptoideDatabase;
import com.aptoide.amethyst.dialogs.AptoideDialog;
import com.aptoide.amethyst.utils.AptoideUtils;
import com.aptoide.amethyst.utils.Logger;
import com.aptoide.models.RollBackItem;

import java.io.File;


/**
 * Created by brutus on 27-12-2013.
 */
public class UninstallRetainFragment extends Fragment {


    private Activity activity;

    private String appName;
    private String packageName;
    private String versionName;
    private String iconPath;

    private String versionToDowngrade;
    private RollBackItem.Action rollBackAction;

    private long id;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setRetainInstance(true);
        Logger.d("Aptoide-Uninstaller", "Uninstalling");

        Bundle args = getArguments();

        if(args.containsKey( "id" )) {
            id = args.getLong( "id" );
            rollBackAction = RollBackItem.Action.UNINSTALLING;
        } else if(args.containsKey( "downgradeVersion" ) ){
            appName = args.getString( "name" );
            packageName = args.getString( "package" );
            versionName = args.getString( "version" );
            iconPath = args.getString( "icon" );
            versionToDowngrade = args.getString( "downgradeVersion" );
            rollBackAction = RollBackItem.Action.DOWNGRADING;
        } else {
            appName = args.getString( "name" );
            packageName = args.getString( "package" );
            versionName = args.getString( "version" );
            iconPath = args.getString( "icon" );
            rollBackAction = RollBackItem.Action.UNINSTALLING;
        }


        new UninstallTask().execute();
    }

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        if (context instanceof Activity) {
            this.activity = (Activity) context;
        }
    }

    @Override
    public void onDetach() {
        super.onDetach();
        activity = null;
    }

    private class UninstallTask extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();

            AptoideDialog.pleaseWaitDialog().show(getFragmentManager(), "pleaseWaitDialog");
        }

        @Override
        protected Void doInBackground(Void... params) {

            AptoideDatabase db = new AptoideDatabase(Aptoide.getDb());
            RollBackItem rollBackItem;
            String apkMd5;

            try {

                if(id>0){
                    Cursor c = db.getApkInfo(id);
                    packageName = c.getString(c.getColumnIndex("package_name"));
                    appName = c.getString(c.getColumnIndex("name"));
                    versionName = c.getString(c.getColumnIndex("version_name"));
                    String icon = c.getString(c.getColumnIndex("icon"));
                    String repoIconPath = c.getString(c.getColumnIndex("iconpath"));
                    iconPath = repoIconPath + icon;
                }


                switch (rollBackAction) {
                    case DOWNGRADING:

                        apkMd5 = calcApkMd5(packageName);

                        rollBackItem = new RollBackItem(appName, packageName, versionToDowngrade, versionName, iconPath, null, apkMd5, null, "");

                        break;

                    default:
                        apkMd5 = db.getUnistallingActionMd5(packageName);

                        if (db.getUnistallingActionMd5(packageName) == null) {
                            apkMd5 = calcApkMd5(packageName);
                        }
                        rollBackItem = new RollBackItem(appName, packageName, versionName, null, iconPath, null, apkMd5, RollBackItem.Action.UNINSTALLING, "");
                        break;
                }

                db.insertRollbackAction(rollBackItem);

            } catch (PackageManager.NameNotFoundException e) {
                Logger.printException(e);
            }
            return null;
        }

        @Override
        protected void onPostExecute(Void v) {
            super.onPostExecute(v);
            if (activity != null) {
                if(rollBackAction == RollBackItem.Action.DOWNGRADING) {
                    uninstall(activity, packageName, true);
                } else {
                    uninstall(activity, packageName, false);
                }
            }

            if(getFragmentManager()!=null){
                DialogFragment pd = (DialogFragment) getFragmentManager().findFragmentByTag("pleaseWaitDialog");
                if(pd!=null){
                    pd.dismissAllowingStateLoss();
                }

                getFragmentManager().beginTransaction().remove(UninstallRetainFragment.this).commitAllowingStateLoss();

            }


        }

        private String calcApkMd5(String packageName) throws PackageManager.NameNotFoundException {
            String sourceDir = activity.getPackageManager().getPackageInfo(packageName, 0).applicationInfo.sourceDir;
            File apkFile = new File(sourceDir);
            return AptoideUtils.Algorithms.md5Calc(apkFile);
        }

    }

    public static void uninstall(Activity context, String package_name, boolean isDowngrade) {
        Uri uri = Uri.fromParts("package", package_name, null);
        Intent intent = new Intent(Intent.ACTION_DELETE, uri);

        if (!package_name.equals(context.getPackageName())) {
            if (isDowngrade) {
                context.startActivityForResult(intent, AppViewActivity.DOWNGRADE_REQUEST_CODE);
//                FlurryAgent.logEvent("Rollback_Downgraded_App");

            } else {
                context.startActivity(intent);
            }
        } else {
            Toast.makeText(context, context.getString(R.string.cannot_uninstall_self), Toast.LENGTH_LONG).show();
        }
    }
}