com.xargsgrep.portknocker.asynctask.RetrieveApplicationsAsyncTask.java Source code

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Here is the source code for com.xargsgrep.portknocker.asynctask.RetrieveApplicationsAsyncTask.java

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/*
 *  Copyright 2014 Ahsan Rabbani
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.xargsgrep.portknocker.asynctask;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

import android.app.ProgressDialog;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.os.AsyncTask;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;

import com.xargsgrep.portknocker.R;
import com.xargsgrep.portknocker.fragment.MiscFragment;
import com.xargsgrep.portknocker.fragment.ProgressDialogFragment;
import com.xargsgrep.portknocker.model.Application;

public class RetrieveApplicationsAsyncTask extends AsyncTask<Void, Void, List<Application>> {

    FragmentActivity activity;
    Fragment fragment;

    public RetrieveApplicationsAsyncTask(FragmentActivity activity, Fragment fragment) {
        this.activity = activity;
        this.fragment = fragment;
    }

    @Override
    protected void onPreExecute() {
        FragmentManager fragmentManager = activity.getSupportFragmentManager();

        FragmentTransaction ft = fragmentManager.beginTransaction();
        Fragment prev = fragmentManager.findFragmentByTag(ProgressDialogFragment.TAG);
        if (prev != null)
            ft.remove(prev);
        ft.addToBackStack(null);

        ProgressDialogFragment dialogFragment = ProgressDialogFragment.newInstance(
                activity.getString(R.string.progress_dialog_retrieving_applications), true,
                ProgressDialog.STYLE_SPINNER);
        dialogFragment.setCancelable(false);
        dialogFragment.show(ft, ProgressDialogFragment.TAG);
    }

    @Override
    protected List<Application> doInBackground(Void... params) {
        PackageManager packageManager = activity.getPackageManager();
        List<ApplicationInfo> installedApplications = packageManager
                .getInstalledApplications(PackageManager.GET_META_DATA);

        List<Application> applications = new ArrayList<Application>();
        for (ApplicationInfo applicationInfo : installedApplications) {
            if (isSystemPackage(applicationInfo)
                    || packageManager.getLaunchIntentForPackage(applicationInfo.packageName) == null)
                continue;
            applications.add(new Application(packageManager.getApplicationLabel(applicationInfo).toString(),
                    applicationInfo.loadIcon(packageManager), applicationInfo.packageName));
        }

        Collections.sort(applications, new Comparator<Application>() {
            @Override
            public int compare(Application app1, Application app2) {
                return app1.getLabel().compareTo(app2.getLabel());
            }
        });
        applications.add(0, new Application("None", null, ""));

        return applications;
    }

    @Override
    protected void onPostExecute(List<Application> applications) {
        FragmentManager fragmentManager = activity.getSupportFragmentManager();

        ((MiscFragment) fragment).initializeApplicationAdapter(applications);
        Fragment dialog = fragmentManager.findFragmentByTag(ProgressDialogFragment.TAG);
        if (dialog != null)
            ((ProgressDialogFragment) dialog).dismiss();
    }

    private boolean isSystemPackage(ApplicationInfo applicationInfo) {
        return ((applicationInfo.flags & ApplicationInfo.FLAG_SYSTEM) != 0);
    }

}