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.Activity; import android.app.AlertDialog; import android.app.ProgressDialog; import android.content.Context; import android.content.DialogInterface; import android.content.SharedPreferences; import android.support.v4.content.ContextCompat; import android.text.Editable; import android.text.InputType; import android.text.TextWatcher; import android.util.Log; import android.util.TypedValue; import android.view.Gravity; import android.view.KeyEvent; import android.view.MotionEvent; import android.view.View; import android.view.inputmethod.EditorInfo; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.TextView; import org.telegram.messenger.AndroidUtilities; import org.telegram.messenger.LocaleController; import org.telegram.messenger.MessagesController; import org.telegram.messenger.MessagesStorage; import org.telegram.messenger.NotificationCenter; import org.telegram.messenger.ApplicationLoader; import org.telegram.messenger.FileLog; import org.telegram.messenger.R; import org.telegram.tgnet.ConnectionsManager; import org.telegram.tgnet.RequestDelegate; import org.telegram.tgnet.TLObject; import org.telegram.tgnet.TLRPC; import org.telegram.messenger.UserConfig; import org.telegram.ui.ActionBar.ActionBar; import org.telegram.ui.ActionBar.ActionBarMenu; import org.telegram.ui.ActionBar.BaseFragment; import org.telegram.ui.Components.LayoutHelper; import java.util.ArrayList; public class ChangeUsernameActivity extends BaseFragment { private EditText firstNameField; private View doneButton; private TextView checkTextView; private int checkReqId = 0; private String lastCheckName = null; private Runnable checkRunnable = null; private boolean lastNameAvailable = false; private final static int done_button = 1; @Override public View createView(Context context) { actionBar.setBackButtonImage(R.drawable.ic_ab_back); actionBar.setAllowOverlayTitle(true); actionBar.setTitle(LocaleController.getString("Username", R.string.Username)); actionBar.setActionBarMenuOnItemClick(new ActionBar.ActionBarMenuOnItemClick() { @Override public void onItemClick(int id) { if (id == -1) { finishFragment(); } else if (id == done_button) { saveName(); } } }); ActionBarMenu menu = actionBar.createMenu(); doneButton = menu.addItemWithWidth(done_button, R.drawable.ic_done, AndroidUtilities.dp(56)); TLRPC.User user = MessagesController.getInstance().getUser(UserConfig.getClientUserId()); if (user == null) { user = UserConfig.getCurrentUser(); } fragmentView = new LinearLayout(context); ((LinearLayout) fragmentView).setOrientation(LinearLayout.VERTICAL); fragmentView.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { return true; } }); firstNameField = new EditText(context); firstNameField.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 18); //firstNameField.setHintTextColor(0xff979797); //firstNameField.setTextColor(0xff212121); firstNameField.setMaxLines(1); firstNameField.setLines(1); firstNameField.setPadding(0, 0, 0, 0); firstNameField.setSingleLine(true); firstNameField.setGravity(LocaleController.isRTL ? Gravity.RIGHT : Gravity.LEFT); firstNameField.setInputType(InputType.TYPE_TEXT_FLAG_CAP_SENTENCES | InputType.TYPE_TEXT_FLAG_MULTI_LINE | InputType.TYPE_TEXT_FLAG_AUTO_CORRECT); firstNameField.setImeOptions(EditorInfo.IME_ACTION_DONE); firstNameField.setHint(LocaleController.getString("UsernamePlaceholder", R.string.UsernamePlaceholder)); AndroidUtilities.clearCursorDrawable(firstNameField); firstNameField.setOnEditorActionListener(new TextView.OnEditorActionListener() { @Override public boolean onEditorAction(TextView textView, int i, KeyEvent keyEvent) { if (i == EditorInfo.IME_ACTION_DONE && doneButton != null) { doneButton.performClick(); return true; } return false; } }); ((LinearLayout) fragmentView).addView(firstNameField, LayoutHelper.createLinear(LayoutHelper.MATCH_PARENT, 36, 24, 24, 24, 0)); if (user != null && user.username != null && user.username.length() > 0) { firstNameField.setText(user.username); firstNameField.setSelection(firstNameField.length()); } checkTextView = new TextView(context); checkTextView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 15); checkTextView.setGravity(LocaleController.isRTL ? Gravity.RIGHT : Gravity.LEFT); ((LinearLayout) fragmentView).addView(checkTextView, LayoutHelper.createLinear(LayoutHelper.WRAP_CONTENT, LayoutHelper.WRAP_CONTENT, LocaleController.isRTL ? Gravity.RIGHT : Gravity.LEFT, 24, 12, 24, 0)); TextView helpTextView = new TextView(context); helpTextView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 15); helpTextView.setTextColor(0xff6d6d72); helpTextView.setGravity(LocaleController.isRTL ? Gravity.RIGHT : Gravity.LEFT); helpTextView.setText( AndroidUtilities.replaceTags(LocaleController.getString("UsernameHelp", R.string.UsernameHelp))); ((LinearLayout) fragmentView).addView(helpTextView, LayoutHelper.createLinear(LayoutHelper.WRAP_CONTENT, LayoutHelper.WRAP_CONTENT, LocaleController.isRTL ? Gravity.RIGHT : Gravity.LEFT, 24, 10, 24, 0)); firstNameField.addTextChangedListener(new TextWatcher() { @Override public void beforeTextChanged(CharSequence charSequence, int i, int i2, int i3) { } @Override public void onTextChanged(CharSequence charSequence, int i, int i2, int i3) { checkUserName(firstNameField.getText().toString(), false); } @Override public void afterTextChanged(Editable editable) { } }); checkTextView.setVisibility(View.GONE); return fragmentView; } @Override public void onResume() { super.onResume(); SharedPreferences preferences = ApplicationLoader.applicationContext.getSharedPreferences("mainconfig", Activity.MODE_PRIVATE); boolean animations = preferences.getBoolean("view_animations", true); if (!animations) { firstNameField.requestFocus(); AndroidUtilities.showKeyboard(firstNameField); } } private void showErrorAlert(String error) { if (getParentActivity() == null) { return; } AlertDialog.Builder builder = new AlertDialog.Builder(getParentActivity()); builder.setTitle(LocaleController.getString("AppName", R.string.AppName)); switch (error) { case "USERNAME_INVALID": builder.setMessage(LocaleController.getString("UsernameInvalid", R.string.UsernameInvalid)); break; case "USERNAME_OCCUPIED": builder.setMessage(LocaleController.getString("UsernameInUse", R.string.UsernameInUse)); break; case "USERNAMES_UNAVAILABLE": builder.setMessage(LocaleController.getString("FeatureUnavailable", R.string.FeatureUnavailable)); break; default: builder.setMessage(LocaleController.getString("ErrorOccurred", R.string.ErrorOccurred)); break; } builder.setPositiveButton(LocaleController.getString("OK", R.string.OK), null); showDialog(builder.create()); } private boolean checkUserName(final String name, boolean alert) { if (name != null && name.length() > 0) { checkTextView.setVisibility(View.VISIBLE); } else { checkTextView.setVisibility(View.GONE); } if (alert && name.length() == 0) { return true; } if (checkRunnable != null) { AndroidUtilities.cancelRunOnUIThread(checkRunnable); checkRunnable = null; lastCheckName = null; if (checkReqId != 0) { ConnectionsManager.getInstance().cancelRequest(checkReqId, true); } } lastNameAvailable = false; if (name != null) { if (name.startsWith("_") || name.endsWith("_")) { checkTextView.setText(LocaleController.getString("UsernameInvalid", R.string.UsernameInvalid)); checkTextView.setTextColor(ContextCompat.getColor(getParentActivity(), R.color.message_error)); return false; } for (int a = 0; a < name.length(); a++) { char ch = name.charAt(a); if (a == 0 && ch >= '0' && ch <= '9') { if (alert) { showErrorAlert(LocaleController.getString("UsernameInvalidStartNumber", R.string.UsernameInvalidStartNumber)); } else { checkTextView.setText(LocaleController.getString("UsernameInvalidStartNumber", R.string.UsernameInvalidStartNumber)); checkTextView .setTextColor(ContextCompat.getColor(getParentActivity(), R.color.message_error)); } return false; } if (!(ch >= '0' && ch <= '9' || ch >= 'a' && ch <= 'z' || ch >= 'A' && ch <= 'Z' || ch == '_')) { if (alert) { showErrorAlert(LocaleController.getString("UsernameInvalid", R.string.UsernameInvalid)); } else { checkTextView .setText(LocaleController.getString("UsernameInvalid", R.string.UsernameInvalid)); checkTextView .setTextColor(ContextCompat.getColor(getParentActivity(), R.color.message_error)); } return false; } } } if (name == null || name.length() < 5) { if (alert) { showErrorAlert(LocaleController.getString("UsernameInvalidShort", R.string.UsernameInvalidShort)); } else { checkTextView .setText(LocaleController.getString("UsernameInvalidShort", R.string.UsernameInvalidShort)); checkTextView.setTextColor(ContextCompat.getColor(getParentActivity(), R.color.message_error)); } return false; } if (name.length() > 32) { if (alert) { showErrorAlert(LocaleController.getString("UsernameInvalidLong", R.string.UsernameInvalidLong)); } else { checkTextView .setText(LocaleController.getString("UsernameInvalidLong", R.string.UsernameInvalidLong)); checkTextView.setTextColor(ContextCompat.getColor(getParentActivity(), R.color.message_error)); } return false; } if (!alert) { String currentName = UserConfig.getCurrentUser().username; if (currentName == null) { currentName = ""; } if (name.equals(currentName)) { checkTextView.setText( LocaleController.formatString("UsernameAvailable", R.string.UsernameAvailable, name)); checkTextView.setTextColor(ContextCompat.getColor(getParentActivity(), R.color.message_ok)); return true; } checkTextView.setText(LocaleController.getString("UsernameChecking", R.string.UsernameChecking)); checkTextView.setTextColor(0xff6d6d72); lastCheckName = name; checkRunnable = new Runnable() { @Override public void run() { TLRPC.TL_account_checkUsername req = new TLRPC.TL_account_checkUsername(); req.username = name; checkReqId = ConnectionsManager.getInstance().sendRequest(req, new RequestDelegate() { @Override public void run(final TLObject response, final TLRPC.TL_error error) { AndroidUtilities.runOnUIThread(new Runnable() { @Override public void run() { checkReqId = 0; if (lastCheckName != null && lastCheckName.equals(name)) { if (error == null && response instanceof TLRPC.TL_boolTrue) { checkTextView.setText(LocaleController.formatString("UsernameAvailable", R.string.UsernameAvailable, name)); checkTextView.setTextColor(ContextCompat.getColor(getParentActivity(), R.color.message_ok)); lastNameAvailable = true; } else { checkTextView.setText(LocaleController.getString("UsernameInUse", R.string.UsernameInUse)); checkTextView.setTextColor(ContextCompat.getColor(getParentActivity(), R.color.message_error)); lastNameAvailable = false; } } } }); } }, ConnectionsManager.RequestFlagFailOnServerErrors); } }; AndroidUtilities.runOnUIThread(checkRunnable, 300); } return true; } private void saveName() { if (!checkUserName(firstNameField.getText().toString(), true)) { return; } TLRPC.User user = UserConfig.getCurrentUser(); if (getParentActivity() == null || user == null) { return; } String currentName = user.username; if (currentName == null) { currentName = ""; } String newName = firstNameField.getText().toString(); if (currentName.equals(newName)) { finishFragment(); return; } final ProgressDialog progressDialog = new ProgressDialog(getParentActivity()); progressDialog.setMessage(LocaleController.getString("Loading", R.string.Loading)); progressDialog.setCanceledOnTouchOutside(false); progressDialog.setCancelable(false); TLRPC.TL_account_updateUsername req = new TLRPC.TL_account_updateUsername(); req.username = newName; NotificationCenter.getInstance().postNotificationName(NotificationCenter.updateInterfaces, MessagesController.UPDATE_MASK_NAME); final int reqId = ConnectionsManager.getInstance().sendRequest(req, new RequestDelegate() { @Override public void run(TLObject response, final TLRPC.TL_error error) { if (error == null) { final TLRPC.User user = (TLRPC.User) response; AndroidUtilities.runOnUIThread(new Runnable() { @Override public void run() { try { progressDialog.dismiss(); } catch (Exception e) { FileLog.e("tmessages", e); } ArrayList<TLRPC.User> users = new ArrayList<>(); users.add(user); MessagesController.getInstance().putUsers(users, false); MessagesStorage.getInstance().putUsersAndChats(users, null, false, true); UserConfig.saveConfig(true); finishFragment(); } }); } else { AndroidUtilities.runOnUIThread(new Runnable() { @Override public void run() { try { progressDialog.dismiss(); } catch (Exception e) { FileLog.e("tmessages", e); } showErrorAlert(error.text); } }); } } }, ConnectionsManager.RequestFlagFailOnServerErrors); ConnectionsManager.getInstance().bindRequestToGuid(reqId, classGuid); progressDialog.setButton(DialogInterface.BUTTON_NEGATIVE, LocaleController.getString("Cancel", R.string.Cancel), new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { ConnectionsManager.getInstance().cancelRequest(reqId, true); try { dialog.dismiss(); } catch (Exception e) { FileLog.e("tmessages", e); } } }); progressDialog.show(); } @Override public void onTransitionAnimationEnd(boolean isOpen, boolean backward) { if (isOpen) { firstNameField.requestFocus(); AndroidUtilities.showKeyboard(firstNameField); } } }