Java tutorial
/* * Copyright 2012 Jakob Flierl * * 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 liqui.droid.activity; import lfapi.v2.schema.Member; import liqui.droid.Constants; import liqui.droid.db.DB; import liqui.droid.db.DB2Schema; import liqui.droid.db.DBProvider; import liqui.droid.holder.BreadCrumbHolder; import liqui.droid.util.IndexableListView; import liqui.droid.util.MemberImage; import liqui.droid.util.StringMatcher; import liqui.droid.R; import android.content.Context; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.ActivityCompat; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.support.v4.widget.CursorAdapter; import android.text.Editable; import android.text.TextWatcher; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.EditText; import android.widget.FilterQueryProvider; import android.widget.ImageView; import android.widget.SectionIndexer; import android.widget.TextView; import android.widget.AdapterView.OnItemClickListener; import com.actionbarsherlock.view.Menu; import com.actionbarsherlock.view.MenuInflater; import com.actionbarsherlock.view.MenuItem; /** * The Class ContactListCached. */ public class ContactListCached extends Base implements LoaderCallbacks<Cursor>, OnItemClickListener, FilterQueryProvider { protected MemberCursorAdapter mAdapter; protected EditText mFilterText = null; protected Uri CONTENT_URI; protected String mSortOrder; protected String mSortDir; protected String mFfilter; protected IndexableListView mListView; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.act_contact_list); setUpActionBar(); setBreadCrumbs(); CONTENT_URI = dbUri(DBProvider.CONTACT_CONTENT_URI); mFilterText = (EditText) findViewById(R.id.search_box); mFilterText.addTextChangedListener(filterTextWatcher); mSortOrder = getSettingStringValue("memberSortOrder", "name"); mSortDir = getSettingStringValue("memberSortDir", "ASC"); mAdapter = new MemberCursorAdapter(this, null, true); mAdapter.setFilterQueryProvider(this); mListView = (IndexableListView) findViewById(R.id.list_view); mListView.setOnItemClickListener(this); mListView.setAdapter(mAdapter); if (mSortOrder.equals("name") && mSortDir.equals("ASC")) { mListView.setFastScrollEnabled(true); } else { mListView.setFastScrollEnabled(false); } mListView.setTextFilterEnabled(true); getSupportLoaderManager().initLoader(0, null, this); } /** * Sets the bread crumbs. */ protected void setBreadCrumbs() { BreadCrumbHolder[] breadCrumbHolders = new BreadCrumbHolder[0]; /* BreadCrumbHolder b = new BreadCrumbHolder(); b.setLabel(getResources().getString(R.string.title_explore)); b.setTag(Constants.EXPLORE); breadCrumbHolders[0] = b; */ createBreadcrumb(getString(R.string.contacts), breadCrumbHolders); } /* (non-Javadoc) * @see android.app.Activity#onCreateOptionsMenu(android.view.Menu) */ @Override public boolean onPrepareOptionsMenu(Menu menu) { menu.clear(); if (mSortOrder.equals("name")) { MenuInflater inflater = getSupportMenuInflater(); inflater.inflate(R.menu.sort_id_menu, menu); } else if (mSortOrder.equals("_id")) { MenuInflater inflater = getSupportMenuInflater(); inflater.inflate(R.menu.sort_name_menu, menu); } if (mSortDir.equals("ASC")) { MenuInflater inflater = getSupportMenuInflater(); inflater.inflate(R.menu.sort_asc_menu, menu); } else if (mSortDir.equals("DESC")) { MenuInflater inflater = getSupportMenuInflater(); inflater.inflate(R.menu.sort_desc_menu, menu); } return true; } /* (non-Javadoc) * @see android.app.Activity#onOptionsItemSelected(android.view.MenuItem) */ @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.sort_id: case R.id.sort_name: if (mSortOrder.equals("name")) { mSortOrder = "_id"; } else { mSortOrder = "name"; } setSettingStringValue("memberSortOrder", mSortOrder); ActivityCompat.invalidateOptionsMenu(this); getSupportLoaderManager().destroyLoader(0); getSupportLoaderManager().initLoader(0, null, this); break; case R.id.sort_order_asc: case R.id.sort_order_desc: if (mSortDir.equals("ASC")) { mSortDir = "DESC"; } else { mSortDir = "ASC"; } setSettingStringValue("memberSortDir", mSortDir); ActivityCompat.invalidateOptionsMenu(this); getSupportLoaderManager().destroyLoader(0); getSupportLoaderManager().initLoader(0, null, this); break; } if (mSortOrder.equals("name") && mSortDir.equals("ASC")) { mListView.setFastScrollEnabled(true); } else { mListView.setFastScrollEnabled(false); } return super.onOptionsItemSelected(item); } private TextWatcher filterTextWatcher = new TextWatcher() { public void afterTextChanged(Editable s) { /* empty */ } public void beforeTextChanged(CharSequence s, int start, int count, int after) { /* empty */ } public void onTextChanged(CharSequence s, int start, int before, int count) { mFfilter = s.toString(); mAdapter.getFilter().filter(s); } }; @Override public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) { Cursor c = (Cursor) adapterView.getAdapter().getItem(position); Intent intent = new Intent().setClass(ContactListCached.this, MemberDetails.class); Uri uri = dbUri(DBProvider.MEMBER_CONTENT_URI.toString()).buildUpon() .appendPath(String.valueOf(c.getInt(c.getColumnIndex(DB.Member.COLUMN_ID)))).build(); intent.putExtra("sortOrder", mSortOrder); intent.putExtra("sortDir", mSortDir); intent.putExtra("filter", mFfilter); intent.putExtra(DBProvider.MEMBER_CONTENT_ITEM_TYPE, uri); Bundle extras = new Bundle(); extras.putString(Constants.Account.API_NAME, getAPIName()); extras.putString(Constants.Account.API_URL, getAPIUrl()); extras.putString(Constants.Account.MEMBER_ID, getMemberId()); extras.putString(Constants.Account.SESSION_KEY, getSessionKey()); intent.putExtras(extras); startActivity(intent); } @Override public Loader<Cursor> onCreateLoader(int arg0, Bundle arg1) { CursorLoader cursorLoader = new CursorLoader(getApplication(), CONTENT_URI, null, "name NOTNULL AND member_id = ?", new String[] { getMemberId() }, mSortOrder + " " + mSortDir); return cursorLoader; } @Override public void onLoadFinished(Loader<Cursor> cl, Cursor cursor) { mAdapter.swapCursor(cursor); } @Override public void onLoaderReset(Loader<Cursor> cursor) { mAdapter.swapCursor(null); } @Override protected void onDestroy() { super.onDestroy(); mFilterText.removeTextChangedListener(filterTextWatcher); } @Override public Cursor runQuery(CharSequence constraint) { CursorLoader cursorLoader = new CursorLoader(this, CONTENT_URI, null, "name NOTNULL AND name LIKE ?", new String[] { "%" + constraint.toString() + "%" }, mSortOrder + " " + mSortDir); return cursorLoader.loadInBackground(); } /** * The Member cursor adapter. */ public class MemberCursorAdapter extends CursorAdapter implements SectionIndexer { MemberImage mMemberImage; public MemberCursorAdapter(Context context, Cursor c, boolean autoRequery) { super(context, c, autoRequery); mMemberImage = new MemberImage(context, getAPIDB()); } public MemberCursorAdapter(Context context, Cursor c, int flags) { super(context, c, flags); mMemberImage = new MemberImage(context, getAPIDB()); } @Override public void bindView(View view, Context context, Cursor cursor) { Member m = DB2Schema.fillMember(cursor); TextView summary = (TextView) view.findViewById(R.id.tv_desc); summary.setText(m.name); TextView desc = (TextView) view.findViewById(R.id.tv_extra); desc.setText(m.eMail); ImageView ivGravatar = (ImageView) view.findViewById(R.id.iv_gravatar); mMemberImage.download("http://dummy?" + m.id + ";avatar", ivGravatar, 80, 80); } @Override public View newView(Context context, Cursor cursor, ViewGroup viewGroup) { LayoutInflater inflater = LayoutInflater.from(context); View v = inflater.inflate(R.layout.row_gravatar_2, viewGroup, false); bindView(v, context, cursor); return v; } private String mSections = "#ABCDEFGHIJKLMNOPQRSTUVWXYZ"; @Override public int getPositionForSection(int section) { // If there is no item for current section, previous section will be selected for (int i = section; i >= 0; i--) { for (int j = 0; j < getCount(); j++) { if (i == 0) { // For numeric section for (int k = 0; k <= 9; k++) { Cursor c = (Cursor) getItem(j); String name = c.getString(c.getColumnIndex("name")); if (name == null) name = " "; name = name.toUpperCase(); if (StringMatcher.match(String.valueOf((name).charAt(0)), String.valueOf(k))) return j; } } else { Cursor c = (Cursor) getItem(j); String name = c.getString(c.getColumnIndex("name")); if (name == null) name = " "; name = name.toUpperCase(); if (StringMatcher.match(String.valueOf((name).charAt(0)), String.valueOf(mSections.charAt(i)))) return j; } } } return 0; } @Override public int getSectionForPosition(int position) { return 0; } @Override public Object[] getSections() { String[] sections = new String[mSections.length()]; for (int i = 0; i < mSections.length(); i++) sections[i] = String.valueOf(mSections.charAt(i)); return sections; } } }