Android Open Source - final_app Load Packages Async Task

• Back to App/campus  ↑

From Project

Back to project page final_app.

License

The source code is released under:

CC0 1.0 Universal Statement of Purpose The laws of most jurisdictions throughout the world automatically confer exclusive Copyright and Related Rights (defined below) upon the creator and subsequent...

Java Source Code

/*
 * Copyright (C) 2009 ZXing authors//  w  w  w .java  2 s. c  om
 *
 * 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.google.zxing.client.android.share;

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

import android.app.ListActivity;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageItemInfo;
import android.content.pm.PackageManager;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListAdapter;

import com.google.zxing.client.android.R;

/**
 * Loads a list of packages installed on the device asynchronously.
 * 
 * @author Sean Owen
 */
final class LoadPackagesAsyncTask extends AsyncTask<Void, Void, List<AppInfo>> {

  private static final String[] PKG_PREFIX_WHITELIST = { "com.google.android.apps.", };
  private static final String[] PKG_PREFIX_BLACKLIST = { "com.android.", "android", "com.google.android.", "com.htc", };

  private final ListActivity activity;

  LoadPackagesAsyncTask(ListActivity activity) {
    this.activity = activity;
  }

  @Override
  protected List<AppInfo> doInBackground(Void... objects) {
    List<AppInfo> labelsPackages = new ArrayList<AppInfo>();
    PackageManager packageManager = activity.getPackageManager();
    Iterable<ApplicationInfo> appInfos = packageManager.getInstalledApplications(0);
    for (PackageItemInfo appInfo : appInfos) {
      String packageName = appInfo.packageName;
      if (!isHidden(packageName)) {
        CharSequence label = appInfo.loadLabel(packageManager);
        Drawable icon = appInfo.loadIcon(packageManager);
        if (label != null) {
          labelsPackages.add(new AppInfo(packageName, label.toString(), icon));
        }
      }
    }
    Collections.sort(labelsPackages);
    return labelsPackages;
  }

  private static boolean isHidden(String packageName) {
    if (packageName == null) {
      return true;
    }
    for (String prefix : PKG_PREFIX_WHITELIST) {
      if (packageName.startsWith(prefix)) {
        return false;
      }
    }
    for (String prefix : PKG_PREFIX_BLACKLIST) {
      if (packageName.startsWith(prefix)) {
        return true;
      }
    }
    return false;
  }

  @Override
  protected void onPostExecute(final List<AppInfo> results) {
    ListAdapter listAdapter = new ArrayAdapter<AppInfo>(activity, R.layout.app_picker_list_item, R.id.app_picker_list_item_label, results) {
      @Override
      public View getView(int position, View convertView, ViewGroup parent) {
        View view = super.getView(position, convertView, parent);
        Drawable icon = results.get(position).getIcon();
        if (icon != null) {
          ((ImageView) view.findViewById(R.id.app_picker_list_item_icon)).setImageDrawable(icon);
        }
        return view;
      }
    };
    activity.setListAdapter(listAdapter);
  }

}

Java Source Code List

• Back to App/campus  ↑