Java tutorial
/* * This is the source code of Telegram for Android v. 1.3.2. * It is licensed under GNU GPL v. 2 or later. * You should have received a copy of the license in this archive (see LICENSE). * * Copyright Nikolai Kudashov, 2013. */ package org.telegram.ui; import android.content.Context; import android.content.Intent; import android.graphics.PixelFormat; import android.os.Bundle; import android.support.v4.internal.view.SupportMenuItem; import android.support.v4.view.MenuItemCompat; import android.support.v7.app.ActionBar; import android.support.v7.app.ActionBarActivity; import android.support.v7.widget.SearchView; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; import org.telegram.messenger.FileLog; import org.telegram.messenger.R; import org.telegram.messenger.Utilities; import org.telegram.ui.Views.PinnedHeaderListView; import org.telegram.ui.Views.SectionedBaseAdapter; import java.io.BufferedReader; import java.io.InputStreamReader; import java.lang.reflect.Field; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.HashMap; import java.util.Timer; import java.util.TimerTask; public class CountrySelectActivity extends ActionBarActivity { private SupportMenuItem searchItem; private SearchView searchView; private SectionedBaseAdapter listViewAdapter; private PinnedHeaderListView listView; private boolean searchWas; private boolean searching; private BaseAdapter searchListViewAdapter; private TextView epmtyTextView; private HashMap<String, ArrayList<Country>> countries = new HashMap<String, ArrayList<Country>>(); private ArrayList<String> sortedCountries = new ArrayList<String>(); private Timer searchDialogsTimer; public ArrayList<Country> searchResult; public static class Country { public String name; public String code; public String shortname; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); try { BufferedReader reader = new BufferedReader( new InputStreamReader(getResources().getAssets().open("countries.txt"))); String line; while ((line = reader.readLine()) != null) { String[] args = line.split(";"); Country c = new Country(); c.name = args[2]; c.code = args[0]; c.shortname = args[1]; String n = c.name.substring(0, 1).toUpperCase(); ArrayList<Country> arr = countries.get(n); if (arr == null) { arr = new ArrayList<Country>(); countries.put(n, arr); sortedCountries.add(n); } arr.add(c); } } catch (Exception e) { FileLog.e("tmessages", e); } Collections.sort(sortedCountries, new Comparator<String>() { @Override public int compare(String lhs, String rhs) { return lhs.compareTo(rhs); } }); for (ArrayList<Country> arr : countries.values()) { Collections.sort(arr, new Comparator<Country>() { @Override public int compare(Country country, Country country2) { return country.name.compareTo(country2.name); } }); } setContentView(R.layout.country_select_layout); epmtyTextView = (TextView) findViewById(R.id.searchEmptyView); searchListViewAdapter = new SearchAdapter(this); listView = (PinnedHeaderListView) findViewById(R.id.listView); listView.setEmptyView(epmtyTextView); listView.setVerticalScrollBarEnabled(false); listView.setAdapter(listViewAdapter = new ListAdapter(this)); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { if (searching && searchWas) { if (i < searchResult.size()) { Country c = searchResult.get(i); Intent intent = new Intent(); intent.putExtra("country", c.name); setResult(RESULT_OK, intent); finish(); } } else { int section = listViewAdapter.getSectionForPosition(i); int row = listViewAdapter.getPositionInSectionForPosition(i); if (section < sortedCountries.size()) { String n = sortedCountries.get(section); ArrayList<Country> arr = countries.get(n); if (row < arr.size()) { Country c = arr.get(row); Intent intent = new Intent(); intent.putExtra("country", c.name); setResult(RESULT_OK, intent); finish(); } } } } }); getWindow().setBackgroundDrawableResource(R.drawable.transparent); getWindow().setFormat(PixelFormat.RGB_565); } public void applySelfActionBar() { ActionBar actionBar = getSupportActionBar(); actionBar.setDisplayShowTitleEnabled(true); actionBar.setDisplayShowHomeEnabled(false); actionBar.setDisplayHomeAsUpEnabled(true); actionBar.setDisplayUseLogoEnabled(false); actionBar.setDisplayShowCustomEnabled(false); actionBar.setCustomView(null); actionBar.setSubtitle(null); actionBar.setTitle(getString(R.string.ChooseCountry)); fixBackButton(); } @Override protected void onResume() { super.onResume(); applySelfActionBar(); } @Override public boolean onOptionsItemSelected(MenuItem item) { int itemId = item.getItemId(); switch (itemId) { case android.R.id.home: if (searchItem != null) { if (searchItem.isActionViewExpanded()) { searchItem.collapseActionView(); } } finish(); break; } return true; } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.contacts_menu, menu); searchItem = (SupportMenuItem) menu.findItem(R.id.messages_list_menu_search); searchView = (SearchView) searchItem.getActionView(); TextView textView = (TextView) searchView.findViewById(R.id.search_src_text); if (textView != null) { textView.setTextColor(0xffffffff); try { Field mCursorDrawableRes = TextView.class.getDeclaredField("mCursorDrawableRes"); mCursorDrawableRes.setAccessible(true); mCursorDrawableRes.set(textView, R.drawable.search_carret); } catch (Exception e) { e.printStackTrace(); } } ImageView img = (ImageView) searchView.findViewById(R.id.search_close_btn); if (img != null) { img.setImageResource(R.drawable.ic_msg_btn_cross_custom); } searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() { @Override public boolean onQueryTextSubmit(String s) { return true; } @Override public boolean onQueryTextChange(String s) { searchDialogs(s); if (s.length() != 0) { searchWas = true; if (listView != null) { listView.setPadding(Utilities.dp(16), listView.getPaddingTop(), Utilities.dp(16), listView.getPaddingBottom()); listView.setAdapter(searchListViewAdapter); if (android.os.Build.VERSION.SDK_INT >= 11) { listView.setFastScrollAlwaysVisible(false); } listView.setFastScrollEnabled(false); listView.setVerticalScrollBarEnabled(true); } if (epmtyTextView != null) { epmtyTextView.setText(getString(R.string.NoResult)); } } return true; } }); searchItem.setSupportOnActionExpandListener(new MenuItemCompat.OnActionExpandListener() { @Override public boolean onMenuItemActionExpand(MenuItem menuItem) { getSupportActionBar().setIcon(R.drawable.ic_ab_search); searching = true; return true; } @Override public boolean onMenuItemActionCollapse(MenuItem menuItem) { searchView.setQuery("", false); searchDialogs(null); searching = false; searchWas = false; ViewGroup group = (ViewGroup) listView.getParent(); listView.setAdapter(listViewAdapter); if (!Utilities.isRTL) { listView.setPadding(Utilities.dp(16), listView.getPaddingTop(), Utilities.dp(30), listView.getPaddingBottom()); } else { listView.setPadding(Utilities.dp(30), listView.getPaddingTop(), Utilities.dp(16), listView.getPaddingBottom()); } if (android.os.Build.VERSION.SDK_INT >= 11) { listView.setFastScrollAlwaysVisible(true); } listView.setFastScrollEnabled(true); listView.setVerticalScrollBarEnabled(false); applySelfActionBar(); epmtyTextView.setText(getString(R.string.ChooseCountry)); return true; } }); return super.onCreateOptionsMenu(menu); } public void fixBackButton() { if (android.os.Build.VERSION.SDK_INT == 19) { //workaround for back button dissapear try { Class firstClass = getSupportActionBar().getClass(); Class aClass = firstClass.getSuperclass(); if (aClass == android.support.v7.app.ActionBar.class) { } else { Field field = aClass.getDeclaredField("mActionBar"); field.setAccessible(true); android.app.ActionBar bar = (android.app.ActionBar) field.get(getSupportActionBar()); field = bar.getClass().getDeclaredField("mActionView"); field.setAccessible(true); View v = (View) field.get(bar); aClass = v.getClass(); field = aClass.getDeclaredField("mHomeLayout"); field.setAccessible(true); v = (View) field.get(v); v.setVisibility(View.VISIBLE); } } catch (Exception e) { e.printStackTrace(); } } } public void searchDialogs(final String query) { if (query == null) { searchResult = null; } else { try { if (searchDialogsTimer != null) { searchDialogsTimer.cancel(); } } catch (Exception e) { FileLog.e("tmessages", e); } searchDialogsTimer = new Timer(); searchDialogsTimer.schedule(new TimerTask() { @Override public void run() { try { searchDialogsTimer.cancel(); searchDialogsTimer = null; } catch (Exception e) { FileLog.e("tmessages", e); } processSearch(query); } }, 100, 300); } } private void processSearch(final String query) { Utilities.globalQueue.postRunnable(new Runnable() { @Override public void run() { String q = query.trim().toLowerCase(); if (q.length() == 0) { updateSearchResults(new ArrayList<Country>()); return; } long time = System.currentTimeMillis(); ArrayList<Country> resultArray = new ArrayList<Country>(); String n = query.substring(0, 1); ArrayList<Country> arr = countries.get(n.toUpperCase()); if (arr != null) { for (Country c : arr) { if (c.name.toLowerCase().startsWith(query)) { resultArray.add(c); } } } updateSearchResults(resultArray); } }); } private void updateSearchResults(final ArrayList<Country> arrCounties) { Utilities.RunOnUIThread(new Runnable() { @Override public void run() { searchResult = arrCounties; searchListViewAdapter.notifyDataSetChanged(); } }); } private class SearchAdapter extends BaseAdapter { private Context mContext; public SearchAdapter(Context context) { mContext = context; } @Override public boolean areAllItemsEnabled() { return true; } @Override public boolean isEnabled(int i) { return true; } @Override public int getCount() { if (searchResult == null) { return 0; } return searchResult.size(); } @Override public Object getItem(int i) { return null; } @Override public long getItemId(int i) { return i; } @Override public boolean hasStableIds() { return false; } @Override public View getView(int i, View view, ViewGroup viewGroup) { if (view == null) { LayoutInflater li = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); view = li.inflate(R.layout.country_row_layout, viewGroup, false); } TextView textView = (TextView) view.findViewById(R.id.settings_row_text); TextView detailTextView = (TextView) view.findViewById(R.id.settings_row_text_detail); View divider = view.findViewById(R.id.settings_row_divider); Country c = searchResult.get(i); textView.setText(c.name); detailTextView.setText("+" + c.code); if (i == searchResult.size() - 1) { divider.setVisibility(View.GONE); } else { divider.setVisibility(View.VISIBLE); } return view; } @Override public int getItemViewType(int i) { return 0; } @Override public int getViewTypeCount() { return 1; } @Override public boolean isEmpty() { return searchResult == null || searchResult.size() == 0; } } private class ListAdapter extends SectionedBaseAdapter { private Context mContext; public ListAdapter(Context context) { mContext = context; } @Override public Object getItem(int section, int position) { return null; } @Override public long getItemId(int section, int position) { return 0; } @Override public int getSectionCount() { return sortedCountries.size(); } @Override public int getCountForSection(int section) { String n = sortedCountries.get(section); ArrayList<Country> arr = countries.get(n); return arr.size(); } @Override public View getItemView(int section, int position, View convertView, ViewGroup parent) { if (convertView == null) { LayoutInflater li = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = li.inflate(R.layout.country_row_layout, parent, false); } TextView textView = (TextView) convertView.findViewById(R.id.settings_row_text); TextView detailTextView = (TextView) convertView.findViewById(R.id.settings_row_text_detail); View divider = convertView.findViewById(R.id.settings_row_divider); String n = sortedCountries.get(section); ArrayList<Country> arr = countries.get(n); Country c = arr.get(position); textView.setText(c.name); detailTextView.setText("+" + c.code); if (position == arr.size() - 1) { divider.setVisibility(View.GONE); } else { divider.setVisibility(View.VISIBLE); } return convertView; } @Override public int getItemViewType(int section, int position) { return 0; } @Override public int getItemViewTypeCount() { return 1; } @Override public int getSectionHeaderViewType(int section) { return 0; } @Override public int getSectionHeaderViewTypeCount() { return 1; } @Override public View getSectionHeaderView(int section, View convertView, ViewGroup parent) { if (convertView == null) { LayoutInflater li = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = li.inflate(R.layout.settings_section_layout, parent, false); convertView.setBackgroundColor(0xfffafafa); } TextView textView = (TextView) convertView.findViewById(R.id.settings_section_text); textView.setText(sortedCountries.get(section).toUpperCase()); return convertView; } } }