Java tutorial
/* 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 id.ridon.keude.views.fragments; import android.content.pm.PackageManager; import android.database.Cursor; import android.graphics.drawable.Drawable; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.support.v4.app.LoaderManager; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.widget.SimpleCursorAdapter; import android.support.v4.widget.SimpleCursorAdapter.ViewBinder; import android.support.v7.view.ActionMode; import android.support.v7.widget.SearchView.OnQueryTextListener; import android.text.TextUtils; import android.view.View; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import id.ridon.keude.KeudeApp; import id.ridon.keude.R; import id.ridon.keude.data.InstalledAppProvider; import id.ridon.keude.data.InstalledAppProvider.DataColumns; import id.ridon.keude.localrepo.LocalRepoManager; import id.ridon.keude.views.SelectLocalAppsActivity; import java.util.HashSet; public class SelectLocalAppsFragment extends ListFragment implements LoaderManager.LoaderCallbacks<Cursor>, OnQueryTextListener { private PackageManager packageManager; private Drawable defaultAppIcon; private SelectLocalAppsActivity selectLocalAppsActivity; private ActionMode mActionMode = null; private String mCurrentFilterString; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); setEmptyText(getString(R.string.no_applications_found)); packageManager = getActivity().getPackageManager(); defaultAppIcon = getActivity().getResources().getDrawable(android.R.drawable.sym_def_app_icon); selectLocalAppsActivity = (SelectLocalAppsActivity) getActivity(); ListView listView = getListView(); listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); SimpleCursorAdapter adapter = new SimpleCursorAdapter(getActivity(), R.layout.select_local_apps_list_item, null, new String[] { InstalledAppProvider.DataColumns.APPLICATION_LABEL, InstalledAppProvider.DataColumns.APP_ID, }, new int[] { R.id.application_label, R.id.package_name, }, 0); adapter.setViewBinder(new ViewBinder() { @Override public boolean setViewValue(View view, Cursor cursor, int columnIndex) { if (columnIndex == cursor.getColumnIndex(InstalledAppProvider.DataColumns.APP_ID)) { String packageName = cursor.getString(columnIndex); TextView textView = (TextView) view.findViewById(R.id.package_name); textView.setText(packageName); LinearLayout ll = (LinearLayout) view.getParent().getParent(); ImageView iconView = (ImageView) ll.getChildAt(0); Drawable icon; try { icon = packageManager.getApplicationIcon(packageName); } catch (PackageManager.NameNotFoundException e) { icon = defaultAppIcon; } iconView.setImageDrawable(icon); return true; } return false; } }); setListAdapter(adapter); setListShown(false); // start out with a progress indicator // either reconnect with an existing loader or start a new one getLoaderManager().initLoader(0, null, this); // build list of existing apps from what is on the file system if (KeudeApp.selectedApps == null) { HashSet<String> selectedApps = new HashSet<String>(); for (String filename : LocalRepoManager.get(selectLocalAppsActivity).repoDir.list()) { if (filename.matches(".*\\.apk")) { String packageName = filename.substring(0, filename.indexOf("_")); selectedApps.add(packageName); } } KeudeApp.selectedApps = selectedApps; } } @Override public void onListItemClick(ListView l, View v, int position, long id) { if (mActionMode == null) mActionMode = selectLocalAppsActivity .startSupportActionMode(selectLocalAppsActivity.mActionModeCallback); Cursor c = (Cursor) getListAdapter().getItem(position); String packageName = c.getString(c.getColumnIndex(DataColumns.APP_ID)); if (KeudeApp.selectedApps.contains(packageName)) { KeudeApp.selectedApps.remove(packageName); } else { KeudeApp.selectedApps.add(packageName); } } @Override public CursorLoader onCreateLoader(int id, Bundle args) { Uri baseUri; if (TextUtils.isEmpty(mCurrentFilterString)) { baseUri = InstalledAppProvider.getContentUri(); } else { baseUri = InstalledAppProvider.getSearchUri(mCurrentFilterString); } CursorLoader loader = new CursorLoader(this.getActivity(), baseUri, InstalledAppProvider.DataColumns.ALL, null, null, InstalledAppProvider.DataColumns.APPLICATION_LABEL); return loader; } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) { SimpleCursorAdapter adapter = (SimpleCursorAdapter) getListAdapter(); adapter.swapCursor(cursor); ListView listView = getListView(); int count = listView.getCount(); String fdroid = loader.getContext().getPackageName(); for (int i = 0; i < count; i++) { Cursor c = ((Cursor) listView.getItemAtPosition(i)); String packageName = c.getString(c.getColumnIndex(DataColumns.APP_ID)); if (TextUtils.equals(packageName, fdroid)) { listView.setItemChecked(i, true); // always include Keude } else { for (String selected : KeudeApp.selectedApps) { if (TextUtils.equals(packageName, selected)) { listView.setItemChecked(i, true); } } } } if (isResumed()) { setListShown(true); } else { setListShownNoAnimation(true); } } @Override public void onLoaderReset(Loader<Cursor> loader) { SimpleCursorAdapter adapter = (SimpleCursorAdapter) getListAdapter(); adapter.swapCursor(null); } @Override public boolean onQueryTextChange(String newText) { String newFilter = !TextUtils.isEmpty(newText) ? newText : null; if (mCurrentFilterString == null && newFilter == null) { return true; } if (mCurrentFilterString != null && mCurrentFilterString.equals(newFilter)) { return true; } mCurrentFilterString = newFilter; getLoaderManager().restartLoader(0, null, this); return true; } @Override public boolean onQueryTextSubmit(String query) { // this is not needed since we respond to every change in text return true; } public String getCurrentFilterString() { return mCurrentFilterString; } }