Java tutorial
/* * Copyright (C) 2015 Dominik Schrmann <dominik@dominikschuermann.de> * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package org.sufficientlysecure.keychain.ui.dialog; import android.app.Activity; import android.support.v7.app.AlertDialog; import android.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.content.DialogInterface.OnClickListener; import android.os.Bundle; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.support.v4.app.DialogFragment; import android.view.KeyEvent; import android.view.LayoutInflater; import android.view.View; import android.view.inputmethod.EditorInfo; import android.view.inputmethod.InputMethodManager; import android.widget.Button; import android.widget.TextView; import android.widget.TextView.OnEditorActionListener; import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.ui.widget.EmailEditText; import org.sufficientlysecure.keychain.util.Log; public class AddEmailDialogFragment extends DialogFragment implements OnEditorActionListener { private static final String ARG_MESSENGER = "messenger"; public static final int MESSAGE_OKAY = 1; public static final int MESSAGE_CANCEL = 2; public static final String MESSAGE_DATA_EMAIL = "email"; private Messenger mMessenger; private EmailEditText mEmail; public static AddEmailDialogFragment newInstance(Messenger messenger) { AddEmailDialogFragment frag = new AddEmailDialogFragment(); Bundle args = new Bundle(); args.putParcelable(ARG_MESSENGER, messenger); frag.setArguments(args); return frag; } /** * Creates dialog */ @Override public Dialog onCreateDialog(Bundle savedInstanceState) { final Activity activity = getActivity(); mMessenger = getArguments().getParcelable(ARG_MESSENGER); CustomAlertDialogBuilder alert = new CustomAlertDialogBuilder(activity); alert.setTitle(R.string.create_key_add_email); LayoutInflater inflater = activity.getLayoutInflater(); View view = inflater.inflate(R.layout.add_email_dialog, null); alert.setView(view); mEmail = (EmailEditText) view.findViewById(R.id.add_email_address); alert.setPositiveButton(android.R.string.ok, new OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { dismiss(); // return new user id back to activity Bundle data = new Bundle(); String email = mEmail.getText().toString(); data.putString(MESSAGE_DATA_EMAIL, email); sendMessageToHandler(MESSAGE_OKAY, data); } }); alert.setNegativeButton(android.R.string.cancel, new OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { dialog.cancel(); } }); // Hack to open keyboard. // This is the only method that I found to work across all Android versions // http://turbomanage.wordpress.com/2012/05/02/show-soft-keyboard-automatically-when-edittext-receives-focus/ // Notes: * onCreateView can't be used because we want to add buttons to the dialog // * opening in onActivityCreated does not work on Android 4.4 mEmail.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { mEmail.post(new Runnable() { @Override public void run() { if (getActivity() != null) { InputMethodManager imm = (InputMethodManager) getActivity() .getSystemService(Context.INPUT_METHOD_SERVICE); imm.showSoftInput(mEmail, InputMethodManager.SHOW_IMPLICIT); } } }); } }); mEmail.requestFocus(); mEmail.setImeActionLabel(getString(android.R.string.ok), EditorInfo.IME_ACTION_DONE); mEmail.setOnEditorActionListener(this); return alert.show(); } @Override public void onCancel(DialogInterface dialog) { super.onCancel(dialog); dismiss(); sendMessageToHandler(MESSAGE_CANCEL); } @Override public void onDismiss(DialogInterface dialog) { super.onDismiss(dialog); // hide keyboard on dismiss hideKeyboard(); } private void hideKeyboard() { if (getActivity() == null) { return; } InputMethodManager inputManager = (InputMethodManager) getActivity() .getSystemService(Context.INPUT_METHOD_SERVICE); // check if no view has focus: View v = getActivity().getCurrentFocus(); if (v == null) return; inputManager.hideSoftInputFromWindow(v.getWindowToken(), 0); } /** * Associate the "done" button on the soft keyboard with the okay button in the view */ @Override public boolean onEditorAction(TextView v, int actionId, KeyEvent event) { if (EditorInfo.IME_ACTION_DONE == actionId) { AlertDialog dialog = ((AlertDialog) getDialog()); Button bt = dialog.getButton(AlertDialog.BUTTON_POSITIVE); bt.performClick(); return true; } return false; } /** * Send message back to handler which is initialized in a activity * * @param what Message integer you want to send */ private void sendMessageToHandler(Integer what) { Message msg = Message.obtain(); msg.what = what; try { mMessenger.send(msg); } catch (RemoteException e) { Log.w(Constants.TAG, "Exception sending message, Is handler present?", e); } catch (NullPointerException e) { Log.w(Constants.TAG, "Messenger is null!", e); } } /** * Send message back to handler which is initialized in a activity * * @param what Message integer you want to send */ private void sendMessageToHandler(Integer what, Bundle data) { Message msg = Message.obtain(); msg.what = what; if (data != null) { msg.setData(data); } try { mMessenger.send(msg); } catch (RemoteException e) { Log.w(Constants.TAG, "Exception sending message, Is handler present?", e); } catch (NullPointerException e) { Log.w(Constants.TAG, "Messenger is null!", e); } } }