Java tutorial
/* * Copyright (C) 2012-2014 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.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.net.Uri; import android.os.Bundle; import android.os.Message; import android.os.Messenger; import android.os.RemoteException; import android.support.annotation.NonNull; import android.support.design.widget.TextInputLayout; import android.support.v4.app.DialogFragment; import android.support.v7.app.AlertDialog; 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.EditText; import android.widget.TextView; import android.widget.TextView.OnEditorActionListener; import org.sufficientlysecure.keychain.Constants; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.ui.EncryptFilesFragment; import org.sufficientlysecure.keychain.util.FileHelper; import org.sufficientlysecure.keychain.util.Log; public class AddEditSmartPGPAuthorityDialogFragment extends DialogFragment implements OnEditorActionListener { private static final String IN_MESSENGER = "in_messenger"; private static final String IN_ACTION = "in_dialog_action"; private static final String IN_POSITION = "in_position"; private static final String IN_ALIAS = "in_authority"; private static final String IN_URI = "in_uri"; public static final String OUT_ACTION = "out_action"; public static final String OUT_ALIAS = "out_alias"; public static final String OUT_POSITION = "out_position"; public static final String OUT_URI = "out_uri"; private Messenger mMessenger; private Action mAction; private int mPosition; private Uri mURI; private EditText mAuthorityAliasText; private TextInputLayout mAuthorityAliasTextLayout; private Button mAuthorityAdd; public enum Action { ADD, EDIT, DELETE } public static AddEditSmartPGPAuthorityDialogFragment newInstance(Messenger messenger, Action action, String alias, Uri uri, int position) { AddEditSmartPGPAuthorityDialogFragment frag = new AddEditSmartPGPAuthorityDialogFragment(); Bundle args = new Bundle(); args.putParcelable(IN_MESSENGER, messenger); args.putSerializable(IN_ACTION, action); args.putString(IN_ALIAS, alias); args.putInt(IN_POSITION, position); if (uri != null) { args.putString(IN_URI, uri.toString()); } frag.setArguments(args); return frag; } @NonNull @Override public Dialog onCreateDialog(Bundle savedInstanceState) { final Activity activity = getActivity(); mMessenger = getArguments().getParcelable(IN_MESSENGER); mAction = (Action) getArguments().getSerializable(IN_ACTION); mPosition = getArguments().getInt(IN_POSITION); if (getArguments().getString(IN_URI) == null) mURI = null; else mURI = Uri.parse(getArguments().getString(IN_URI)); CustomAlertDialogBuilder alert = new CustomAlertDialogBuilder(activity); LayoutInflater inflater = activity.getLayoutInflater(); View view = inflater.inflate(R.layout.add_smartpgp_authority_dialog, null); alert.setView(view); mAuthorityAliasText = (EditText) view.findViewById(R.id.smartpgp_authority_alias_edit_text); mAuthorityAliasTextLayout = (TextInputLayout) view .findViewById(R.id.smartpgp_authority_alias_edit_text_layout); mAuthorityAdd = (Button) view.findViewById(R.id.smartpgp_authority_filename); mAuthorityAdd.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { FileHelper.openDocument(AddEditSmartPGPAuthorityDialogFragment.this, null, "*/*", false, EncryptFilesFragment.REQUEST_CODE_INPUT); } }); mAuthorityAliasText.setText(getArguments().getString(IN_ALIAS)); switch (mAction) { case ADD: alert.setTitle(R.string.add_smartpgp_authority_dialog_title); break; case EDIT: case DELETE: alert.setTitle(R.string.show_smartpgp_authority_dialog_title); break; } // we don't want dialog to be dismissed on click for keyserver addition or edit, // thereby requiring the hack seen below and in onStart alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { // we need to have an empty listener to prevent errors on some devices as mentioned // at http://stackoverflow.com/q/13746412/3000919 // actual listener set in onStart for adding keyservers or editing them dismiss(); } }); alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int id) { dismiss(); } }); switch (mAction) { case EDIT: case DELETE: alert.setNeutralButton(R.string.label_smartpgp_authority_dialog_delete, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { deleteAuthority(); } }); break; } // 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 mAuthorityAliasText.setOnFocusChangeListener(new View.OnFocusChangeListener() { @Override public void onFocusChange(View v, boolean hasFocus) { mAuthorityAliasText.post(new Runnable() { @Override public void run() { InputMethodManager imm = (InputMethodManager) getActivity() .getSystemService(Context.INPUT_METHOD_SERVICE); imm.showSoftInput(mAuthorityAliasText, InputMethodManager.SHOW_IMPLICIT); } }); } }); mAuthorityAliasText.requestFocus(); mAuthorityAliasText.setImeActionLabel(getString(android.R.string.ok), EditorInfo.IME_ACTION_DONE); mAuthorityAliasText.setOnEditorActionListener(this); return alert.show(); } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case EncryptFilesFragment.REQUEST_CODE_INPUT: if (data != null) { mURI = data.getData(); } else { mURI = null; } break; } } @Override public void onStart() { super.onStart(); AlertDialog addKeyserverDialog = (AlertDialog) getDialog(); if (addKeyserverDialog != null) { Button positiveButton = addKeyserverDialog.getButton(Dialog.BUTTON_POSITIVE); positiveButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { mAuthorityAliasTextLayout.setErrorEnabled(false); dismiss(); // return unverified keyserver back to activity authorityEdited(); } }); } } public void authorityEdited() { dismiss(); Bundle data = new Bundle(); data.putSerializable(OUT_ACTION, mAction); data.putString(OUT_ALIAS, mAuthorityAliasText.getText().toString()); data.putInt(OUT_POSITION, mPosition); if (mURI != null) { data.putString(OUT_URI, mURI.toString()); } sendMessageToHandler(data); } public void deleteAuthority() { dismiss(); Bundle data = new Bundle(); data.putSerializable(OUT_ACTION, Action.DELETE); data.putString(OUT_ALIAS, mAuthorityAliasText.getText().toString()); data.putInt(OUT_POSITION, mPosition); sendMessageToHandler(data); } @Override public void onDismiss(DialogInterface dialog) { // hide keyboard on dismiss hideKeyboard(); super.onDismiss(dialog); } 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 * */ private void sendMessageToHandler(Bundle data) { Message msg = Message.obtain(); 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); } } }