Java tutorial
/* * This is the source code of Telegram for Android v. 3.x.x. * 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, 2013-2016. */ package org.telegram.ui; import android.app.AlertDialog; import android.content.Context; import android.content.DialogInterface; import android.os.Build; import android.os.Bundle; import android.support.v4.content.ContextCompat; import android.view.Gravity; import android.view.MotionEvent; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.FrameLayout; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.TextView; import org.telegram.PhoneFormat.PhoneFormat; import org.telegram.messenger.LocaleController; import org.telegram.tgnet.TLRPC; import org.telegram.messenger.MessagesController; import org.telegram.messenger.NotificationCenter; import org.telegram.messenger.R; import org.telegram.ui.Adapters.BaseFragmentAdapter; import org.telegram.ui.Cells.TextInfoCell; import org.telegram.ui.Cells.UserCell; import org.telegram.ui.ActionBar.ActionBar; import org.telegram.ui.ActionBar.ActionBarMenu; import org.telegram.ui.ActionBar.BaseFragment; import org.telegram.ui.Components.LayoutHelper; public class BlockedUsersActivity extends BaseFragment implements NotificationCenter.NotificationCenterDelegate, ContactsActivity.ContactsActivityDelegate { private ListView listView; private ListAdapter listViewAdapter; private FrameLayout progressView; private TextView emptyTextView; private int selectedUserId; private final static int block_user = 1; @Override public boolean onFragmentCreate() { super.onFragmentCreate(); NotificationCenter.getInstance().addObserver(this, NotificationCenter.updateInterfaces); NotificationCenter.getInstance().addObserver(this, NotificationCenter.blockedUsersDidLoaded); MessagesController.getInstance().getBlockedUsers(false); return true; } @Override public void onFragmentDestroy() { super.onFragmentDestroy(); NotificationCenter.getInstance().removeObserver(this, NotificationCenter.updateInterfaces); NotificationCenter.getInstance().removeObserver(this, NotificationCenter.blockedUsersDidLoaded); } @Override public View createView(Context context) { actionBar.setBackButtonImage(R.drawable.ic_ab_back); actionBar.setAllowOverlayTitle(true); actionBar.setTitle(LocaleController.getString("BlockedUsers", R.string.BlockedUsers)); actionBar.setActionBarMenuOnItemClick(new ActionBar.ActionBarMenuOnItemClick() { @Override public void onItemClick(int id) { if (id == -1) { finishFragment(); } else if (id == block_user) { Bundle args = new Bundle(); args.putBoolean("onlyUsers", true); args.putBoolean("destroyAfterSelect", true); args.putBoolean("returnAsResult", true); ContactsActivity fragment = new ContactsActivity(args); fragment.setDelegate(BlockedUsersActivity.this); presentFragment(fragment); } } }); ActionBarMenu menu = actionBar.createMenu(); menu.addItem(block_user, R.drawable.plus); fragmentView = new FrameLayout(context); FrameLayout frameLayout = (FrameLayout) fragmentView; emptyTextView = new TextView(context); emptyTextView.setTextColor(ContextCompat.getColor(context, R.color.disabled_text)); emptyTextView.setTextSize(20); emptyTextView.setGravity(Gravity.CENTER); emptyTextView.setVisibility(View.INVISIBLE); emptyTextView.setText(LocaleController.getString("NoBlocked", R.string.NoBlocked)); frameLayout.addView(emptyTextView, LayoutHelper.createFrame(LayoutHelper.MATCH_PARENT, LayoutHelper.MATCH_PARENT, Gravity.TOP | Gravity.LEFT)); emptyTextView.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { return true; } }); progressView = new FrameLayout(context); frameLayout.addView(progressView, LayoutHelper.createFrame(LayoutHelper.MATCH_PARENT, LayoutHelper.MATCH_PARENT)); ProgressBar progressBar = new ProgressBar(context); progressView.addView(progressBar, LayoutHelper.createFrame(LayoutHelper.WRAP_CONTENT, LayoutHelper.WRAP_CONTENT, Gravity.CENTER)); listView = new ListView(context); listView.setEmptyView(emptyTextView); listView.setVerticalScrollBarEnabled(false); listView.setDivider(null); listView.setDividerHeight(0); listView.setAdapter(listViewAdapter = new ListAdapter(context)); listView.setVerticalScrollbarPosition( LocaleController.isRTL ? ListView.SCROLLBAR_POSITION_LEFT : ListView.SCROLLBAR_POSITION_RIGHT); frameLayout.addView(listView, LayoutHelper.createFrame(LayoutHelper.MATCH_PARENT, LayoutHelper.MATCH_PARENT)); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) { if (i < MessagesController.getInstance().blockedUsers.size()) { Bundle args = new Bundle(); args.putInt("user_id", MessagesController.getInstance().blockedUsers.get(i)); presentFragment(new ProfileActivity(args)); } } }); listView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> adapterView, View view, int i, long l) { if (i < 0 || i >= MessagesController.getInstance().blockedUsers.size() || getParentActivity() == null) { return true; } selectedUserId = MessagesController.getInstance().blockedUsers.get(i); AlertDialog.Builder builder = new AlertDialog.Builder(getParentActivity()); CharSequence[] items = new CharSequence[] { LocaleController.getString("Unblock", R.string.Unblock) }; builder.setItems(items, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { if (i == 0) { MessagesController.getInstance().unblockUser(selectedUserId); } } }); showDialog(builder.create()); return true; } }); if (MessagesController.getInstance().loadingBlockedUsers) { progressView.setVisibility(View.VISIBLE); emptyTextView.setVisibility(View.GONE); listView.setEmptyView(null); } else { progressView.setVisibility(View.GONE); listView.setEmptyView(emptyTextView); } return fragmentView; } @Override public void didReceivedNotification(int id, Object... args) { if (id == NotificationCenter.updateInterfaces) { int mask = (Integer) args[0]; if ((mask & MessagesController.UPDATE_MASK_AVATAR) != 0 || (mask & MessagesController.UPDATE_MASK_NAME) != 0) { updateVisibleRows(mask); } } else if (id == NotificationCenter.blockedUsersDidLoaded) { if (progressView != null) { progressView.setVisibility(View.GONE); } if (listView != null && listView.getEmptyView() == null) { listView.setEmptyView(emptyTextView); } if (listViewAdapter != null) { listViewAdapter.notifyDataSetChanged(); } } } private void updateVisibleRows(int mask) { if (listView == null) { return; } int count = listView.getChildCount(); for (int a = 0; a < count; a++) { View child = listView.getChildAt(a); if (child instanceof UserCell) { ((UserCell) child).update(mask); } } } @Override public void onResume() { super.onResume(); if (listViewAdapter != null) { listViewAdapter.notifyDataSetChanged(); } } @Override public void didSelectContact(final TLRPC.User user, String param) { if (user == null) { return; } MessagesController.getInstance().blockUser(user.id); } private class ListAdapter extends BaseFragmentAdapter { private Context mContext; public ListAdapter(Context context) { mContext = context; } @Override public boolean areAllItemsEnabled() { return false; } @Override public boolean isEnabled(int i) { return i != MessagesController.getInstance().blockedUsers.size(); } @Override public int getCount() { if (MessagesController.getInstance().blockedUsers.isEmpty()) { return 0; } return MessagesController.getInstance().blockedUsers.size() + 1; } @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) { int type = getItemViewType(i); if (type == 0) { if (view == null) { view = new UserCell(mContext, 1, 0, false); ((UserCell) view).setForeground(R.drawable.list_selector); } TLRPC.User user = MessagesController.getInstance() .getUser(MessagesController.getInstance().blockedUsers.get(i)); if (user != null) { String number; if (user.bot) { number = LocaleController.getString("Bot", R.string.Bot).substring(0, 1).toUpperCase() + LocaleController.getString("Bot", R.string.Bot).substring(1); } else if (user.phone != null && user.phone.length() != 0) { number = PhoneFormat.getInstance().format("+" + user.phone); } else { number = LocaleController.getString("NumberUnknown", R.string.NumberUnknown); } ((UserCell) view).setData(user, null, number, 0); } } else if (type == 1) { if (view == null) { view = new TextInfoCell(mContext); ((TextInfoCell) view).setText(LocaleController.getString("UnblockText", R.string.UnblockText)); } } return view; } @Override public int getItemViewType(int i) { if (i == MessagesController.getInstance().blockedUsers.size()) { return 1; } return 0; } @Override public int getViewTypeCount() { return 2; } @Override public boolean isEmpty() { return MessagesController.getInstance().blockedUsers.isEmpty(); } } }