Android Open Source - Chopping App List Fragment

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License

The source code is released under:

Apache License

Java Source Code

package com.chopping.fragments;
/*from ww  w.  j ava2 s.c o  m*/
import java.lang.ref.WeakReference;
import java.util.ArrayList;
import java.util.List;
import java.util.Set;

import android.app.Activity;
import android.app.Application;
import android.content.res.Resources;
import android.os.Bundle;
import android.support.v4.util.ArrayMap;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.TextView;

import com.android.volley.Request;
import com.android.volley.toolbox.NetworkImageView;
import com.chopping.R;
import com.chopping.bus.CloseDrawerEvent;
import com.chopping.bus.ExternalAppChangedEvent;
import com.chopping.bus.LinkToExternalAppEvent;
import com.chopping.data.AppList;
import com.chopping.data.AppListItem;
import com.chopping.net.GsonRequestTask;
import com.chopping.net.TaskHelper;

import de.greenrobot.event.EventBus;

/**
 * {@link  AppListFragment} has all external application links.
 *
 * @author Xinyue Zhao
 */
public abstract class AppListFragment extends BaseFragment {
  /**
   * Main layout for this component.
   */
  private static final int LAYOUT = R.layout.fragment_app_list;
  /**
   * Layout for an external application to download/install/open.
   */
  private static final int LAYOUT_APP_ITEM = R.layout.inc_app;
  /**
   * {@link android.view.ViewGroup} for external applications.
   */
  private ViewGroup mAppListVg;
  /**
   * True if a loading app-list request is under way.
   */
  private boolean mReqInProcess = false;
  /**
   * {@link android.widget.Button}s of all external applications.
   * </p>
   * It is a map of the key that item of application against value {@link android.widget.Button} .
   */
  private ArrayMap<AppListItem, WeakReference<Button>> mAppButtons = new ArrayMap<AppListItem, WeakReference<Button>>();

  //------------------------------------------------
  //Subscribes, event-handlers
  //------------------------------------------------



  /**
   * Event, show app-list when they have been loaded.
   *
   * @param e
   *     {@link  AppList}.
   */
  public void onEvent(AppList e) {
    showAppList(e.getItems());
  }

  /**
   * Event, open an external app that has been installed.
   *
   * @param e
   *     {@link  LinkToExternalAppEvent}.
   */
  public void onEvent(LinkToExternalAppEvent e) {
    com.chopping.utils.Utils.linkToExternalApp(getActivity(), e.getAppListItem());
  }


  /**
   * Event, update list of external apps.
   *
   * @param e
   *     {@link  ExternalAppChangedEvent}.
   */
  public void onEvent(ExternalAppChangedEvent e) {
    updateForAppChanged(e);
  }



  //------------------------------------------------


  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    return inflater.inflate(LAYOUT, container, false);
  }

  @Override
  public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    mAppListVg = (ViewGroup) view.findViewById(R.id.app_list_ll);
    loadAppList();
  }


  /**
   * Update the status of buttons that can open store linking to the external _app or directly on the _app.
   *
   * @param appOpen
   *     The button for the app, open, install, or buy.
   * @param app
   *     The data-set represent an external app.
   */
  private void refreshExternalAppButtonStatus(final Button appOpen, final AppListItem app) {
    Activity activity = getActivity();
    if (activity != null) {
      Resources res = getResources();
      if (com.chopping.utils.Utils.isAppInstalled(app.getPackageName(), activity.getPackageManager())) {
        appOpen.setText(R.string.extapp_open);
        appOpen.setTextColor(res.getColor(R.color.installed_text));
        appOpen.setBackgroundResource(R.drawable.selector_intstalled_app_item_btn_color);
      } else {
        appOpen.setText(app.getFree() ? R.string.extapp_download : R.string.extapp_buy);
        appOpen.setTextColor(res.getColor(R.color.not_installed_text));
        appOpen.setBackgroundResource(R.drawable.selector_not_intstalled_app_item_btn_color);
      }
    }
  }

  /**
   * Show list of all external applications.
   *
   * @param apps
   *     The array of all external applications.
   */
  private void showAppList(AppListItem[] apps) {
    Activity activity = getActivity();
    if (activity != null) {
      /* It should filter itself. */
      String packageName = getActivity().getPackageName();
      List<AppListItem> appsFiltered = new ArrayList<AppListItem>();
      for (AppListItem app : apps) {
        if (TextUtils.equals(packageName, app.getPackageName())) {
          continue;
        }
        appsFiltered.add(app);
      }
      View itemV;
      NetworkImageView logoIv;
      TextView appNameTv;
      Button appBtn;
      mAppListVg.removeAllViews();
      for (final AppListItem item : appsFiltered) {
        itemV =activity.getLayoutInflater().inflate(LAYOUT_APP_ITEM, mAppListVg, false);
        logoIv = (NetworkImageView) itemV.findViewById(R.id.app_logo_iv);
        appNameTv = (TextView) itemV.findViewById(R.id.app_name_tv);
        appBtn = (Button) itemV.findViewById(R.id.start_app_btn);
        logoIv.setDefaultImageResId(R.drawable.ic_launcher);
        logoIv.setImageUrl(item.getLogoUrl(), TaskHelper.getImageLoader());
        appNameTv.setText(item.getName());
        refreshExternalAppButtonStatus(appBtn, item);
        appBtn.setOnClickListener(new View.OnClickListener() {
          @Override
          public void onClick(View v) {
            EventBus.getDefault().post(new CloseDrawerEvent());
            EventBus.getDefault().post(new LinkToExternalAppEvent(item));
          }
        });
        mAppButtons.put(item , new WeakReference<Button>(appBtn));
        mAppListVg.addView(itemV);
      }
    }
    mReqInProcess = false;
  }


  /**
   * Load list of apps.
   */
  private void loadAppList() {
    Activity activity = getActivity();
    if (activity != null) {
      Application app = activity.getApplication();
      final String urlAppList = getPrefs().getApiAppList();
      if (!TextUtils.isEmpty(urlAppList) && !mReqInProcess) {
        new GsonRequestTask<AppList>(app, Request.Method.GET, urlAppList,
            AppList.class).execute();
        mReqInProcess = true;
      }
    }
  }


  /**
   * The application status has been changed and handling now.
   * @param e {@link  ExternalAppChangedEvent}
   */
  private void updateForAppChanged(ExternalAppChangedEvent e) {
    Set<AppListItem> keys = mAppButtons.keySet();
    for(AppListItem key : keys) {
      if (TextUtils.equals(e.getPackageName(), key.getPackageName())) {
        WeakReference<Button> appBtnRef = mAppButtons.get(key);
        if(appBtnRef != null && appBtnRef.get() != null) {
          Button appBtn = appBtnRef.get();
          refreshExternalAppButtonStatus(appBtn, key);
        }
        break;
      }
    }
  }
}

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