Java tutorial
/* * Copyright 2010-2012 Sony Ericsson Mobile Communications AB * * 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 org.mariotaku.twidere.extension.timescape; import static org.mariotaku.twidere.extension.timescape.util.EventStreamAccessor.insertOrUpdatePlugin; import java.util.ArrayList; import org.mariotaku.twidere.Twidere; import org.mariotaku.twidere.extension.timescape.util.ListUtils; import org.mariotaku.twidere.extension.timescape.util.Utils; import org.mariotaku.twidere.provider.TweetStore.Accounts; import android.app.Application; import android.content.ActivityNotFoundException; import android.content.Intent; import android.content.SharedPreferences; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.widget.SimpleCursorAdapter; import android.util.SparseBooleanArray; import android.view.View; import android.view.View.OnClickListener; import android.widget.AdapterView; import android.widget.AdapterView.OnItemClickListener; import android.widget.ListView; import com.sonyericsson.eventstream.EventStreamConstants.ConfigState; /** * This activity handles the extension event on user interface. */ public class ExtensionSettingsActivity extends FragmentActivity implements Constants, LoaderCallbacks<Cursor>, OnClickListener, OnItemClickListener { private SimpleCursorAdapter mAdapter; private ListView mListView; private View mEmptyView; private Cursor mCursor; private SharedPreferences mPreferences; private static final String[] FROM = new String[] { Accounts.USERNAME }; private static final int[] TO = new int[] { android.R.id.text1 }; private final ArrayList<Long> mSelectedIds = new ArrayList<Long>(); @Override public void onClick(View v) { switch (v.getId()) { case R.id.add_account: { try { startActivity(new Intent(Twidere.INTENT_ACTION_TWITTER_LOGIN)); } catch (final ActivityNotFoundException e) { startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(TWIDERE_GOOGLE_PLAY_LINK))); } break; } } } @Override public void onCreate(Bundle savedInstanceState) { mPreferences = getSharedPreferences(SHARED_PREFERENCES_NAME, MODE_PRIVATE); super.onCreate(savedInstanceState); setContentView(R.layout.main); mAdapter = new SimpleCursorAdapter(this, android.R.layout.simple_list_item_multiple_choice, null, FROM, TO, 0); mListView = (ListView) findViewById(android.R.id.list); mEmptyView = findViewById(android.R.id.empty); mListView.setAdapter(mAdapter); mListView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE); mListView.setOnItemClickListener(this); getSupportLoaderManager().initLoader(0, null, this); final long[] activated_ids = savedInstanceState != null ? savedInstanceState.getLongArray(Twidere.INTENT_KEY_IDS) : Utils.getSelectedIdsInPreferences(this); mSelectedIds.clear(); if (activated_ids != null) { for (final long id : activated_ids) { mSelectedIds.add(id); } } } @Override public Loader<Cursor> onCreateLoader(int id, Bundle args) { final Uri uri = Accounts.CONTENT_URI; final String[] cols = Accounts.COLUMNS; final String where = Accounts.IS_ACTIVATED + " = 1"; return new CursorLoader(this, uri, cols, where, null, null); } @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { if (mCursor == null || mCursor.isClosed()) return; final SparseBooleanArray checkedpositions = mListView.getCheckedItemPositions(); final boolean checked = checkedpositions.get(position, false); mCursor.moveToPosition(position); final long user_id = mCursor.getLong(mCursor.getColumnIndex(Accounts.USER_ID)); if (!checked) { if (mSelectedIds.contains(user_id)) { mSelectedIds.remove(user_id); } } else if (!mSelectedIds.contains(user_id)) { mSelectedIds.add(user_id); } final SharedPreferences.Editor editor = mPreferences.edit(); editor.putString(PREFERENCE_KEY_SELECTED_IDS, ListUtils.buildString(mSelectedIds, ',', false)); editor.commit(); insertOrUpdatePlugin(this, mSelectedIds.size() > 0 ? ConfigState.CONFIGURED : ConfigState.NOT_CONFIGURED); final Application application = getApplication(); if (application instanceof ExtensionApplication) { ((ExtensionApplication) application).loadStatuses(); } } @Override public void onLoaderReset(Loader<Cursor> loader) { mAdapter.changeCursor(null); mCursor = null; } @Override public void onLoadFinished(Loader<Cursor> loader, Cursor cursor) { mAdapter.changeCursor(cursor); mCursor = cursor; final boolean has_activated_account = cursor != null && cursor.getCount() > 0; mListView.setVisibility(has_activated_account ? View.VISIBLE : View.GONE); mEmptyView.setVisibility(!has_activated_account ? View.VISIBLE : View.GONE); if (mCursor != null) { for (final long id : mSelectedIds) { mCursor.moveToFirst(); while (!mCursor.isAfterLast()) { final long user_id = mCursor.getLong(mCursor.getColumnIndexOrThrow(Accounts.USER_ID)); if (id == user_id) { mListView.setItemChecked(mCursor.getPosition(), true); } mCursor.moveToNext(); } } } } @Override public void onSaveInstanceState(Bundle outState) { final int ids_size = mSelectedIds.size(); final long[] ids = new long[ids_size]; for (int i = 0; i < ids_size; i++) { ids[i] = mSelectedIds.get(i); } outState.putLongArray(Twidere.INTENT_KEY_IDS, ids); super.onSaveInstanceState(outState); } }