Java tutorial
/* * Copyright (C) 2012-2013 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.annotation.SuppressLint; import android.app.Dialog; import android.content.Context; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.v4.app.DialogFragment; import android.support.v4.app.FragmentActivity; import android.support.v7.app.AlertDialog; import android.text.Html; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.DatePicker; import android.widget.RadioButton; import android.widget.RadioGroup; import android.widget.Spinner; import android.widget.TableRow; import android.widget.TextView; import android.widget.Toast; import org.bouncycastle.bcpg.sig.KeyFlags; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.service.SaveKeyringParcel; import org.sufficientlysecure.keychain.service.SaveKeyringParcel.Algorithm; import org.sufficientlysecure.keychain.service.SaveKeyringParcel.Curve; import org.sufficientlysecure.keychain.util.Choice; import java.util.ArrayList; import java.util.Calendar; import java.util.List; import java.util.TimeZone; public class AddSubkeyDialogFragment extends DialogFragment { public interface OnAlgorithmSelectedListener { void onAlgorithmSelected(SaveKeyringParcel.SubkeyAdd newSubkey); } public enum SupportedKeyType { RSA_2048, RSA_3072, RSA_4096, ECC_P256, ECC_P521 } private static final String ARG_WILL_BE_MASTER_KEY = "will_be_master_key"; private OnAlgorithmSelectedListener mAlgorithmSelectedListener; private CheckBox mNoExpiryCheckBox; private TableRow mExpiryRow; private DatePicker mExpiryDatePicker; private Spinner mKeyTypeSpinner; private RadioGroup mUsageRadioGroup; private RadioButton mUsageNone; private RadioButton mUsageSign; private RadioButton mUsageEncrypt; private RadioButton mUsageSignAndEncrypt; private boolean mWillBeMasterKey; public void setOnAlgorithmSelectedListener(OnAlgorithmSelectedListener listener) { mAlgorithmSelectedListener = listener; } public static AddSubkeyDialogFragment newInstance(boolean willBeMasterKey) { AddSubkeyDialogFragment frag = new AddSubkeyDialogFragment(); Bundle args = new Bundle(); args.putBoolean(ARG_WILL_BE_MASTER_KEY, willBeMasterKey); frag.setArguments(args); return frag; } @NonNull @Override public Dialog onCreateDialog(Bundle savedInstanceState) { final FragmentActivity context = getActivity(); final LayoutInflater mInflater; mWillBeMasterKey = getArguments().getBoolean(ARG_WILL_BE_MASTER_KEY); mInflater = context.getLayoutInflater(); CustomAlertDialogBuilder dialog = new CustomAlertDialogBuilder(context); @SuppressLint("InflateParams") View view = mInflater.inflate(R.layout.add_subkey_dialog, null); dialog.setView(view); mNoExpiryCheckBox = (CheckBox) view.findViewById(R.id.add_subkey_no_expiry); mExpiryRow = (TableRow) view.findViewById(R.id.add_subkey_expiry_row); mExpiryDatePicker = (DatePicker) view.findViewById(R.id.add_subkey_expiry_date_picker); mKeyTypeSpinner = (Spinner) view.findViewById(R.id.add_subkey_type); mUsageRadioGroup = (RadioGroup) view.findViewById(R.id.add_subkey_usage_group); mUsageNone = (RadioButton) view.findViewById(R.id.add_subkey_usage_none); mUsageSign = (RadioButton) view.findViewById(R.id.add_subkey_usage_sign); mUsageEncrypt = (RadioButton) view.findViewById(R.id.add_subkey_usage_encrypt); mUsageSignAndEncrypt = (RadioButton) view.findViewById(R.id.add_subkey_usage_sign_and_encrypt); if (mWillBeMasterKey) { dialog.setTitle(R.string.title_change_master_key); mUsageNone.setVisibility(View.VISIBLE); mUsageNone.setChecked(true); } else { dialog.setTitle(R.string.title_add_subkey); } mNoExpiryCheckBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() { @Override public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { if (isChecked) { mExpiryRow.setVisibility(View.GONE); } else { mExpiryRow.setVisibility(View.VISIBLE); } } }); // date picker works based on default time zone Calendar minDateCal = Calendar.getInstance(TimeZone.getDefault()); minDateCal.add(Calendar.DAY_OF_YEAR, 1); // at least one day after creation (today) mExpiryDatePicker.setMinDate(minDateCal.getTime().getTime()); { ArrayList<Choice<SupportedKeyType>> choices = new ArrayList<>(); choices.add(new Choice<>(SupportedKeyType.RSA_2048, getResources().getString(R.string.rsa_2048), getResources().getString(R.string.rsa_2048_description_html))); choices.add(new Choice<>(SupportedKeyType.RSA_3072, getResources().getString(R.string.rsa_3072), getResources().getString(R.string.rsa_3072_description_html))); choices.add(new Choice<>(SupportedKeyType.RSA_4096, getResources().getString(R.string.rsa_4096), getResources().getString(R.string.rsa_4096_description_html))); choices.add(new Choice<>(SupportedKeyType.ECC_P256, getResources().getString(R.string.ecc_p256), getResources().getString(R.string.ecc_p256_description_html))); choices.add(new Choice<>(SupportedKeyType.ECC_P521, getResources().getString(R.string.ecc_p521), getResources().getString(R.string.ecc_p521_description_html))); TwoLineArrayAdapter adapter = new TwoLineArrayAdapter(context, android.R.layout.simple_spinner_item, choices); mKeyTypeSpinner.setAdapter(adapter); // make RSA 3072 the default for (int i = 0; i < choices.size(); ++i) { if (choices.get(i).getId() == SupportedKeyType.RSA_3072) { mKeyTypeSpinner.setSelection(i); break; } } } dialog.setCancelable(true); // onClickListener are set in onStart() to override default dismiss behaviour dialog.setPositiveButton(android.R.string.ok, null); dialog.setNegativeButton(android.R.string.cancel, null); final AlertDialog alertDialog = dialog.show(); mKeyTypeSpinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() { @Override public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { // noinspection unchecked SupportedKeyType keyType = ((Choice<SupportedKeyType>) parent.getSelectedItem()).getId(); // RadioGroup.getCheckedRadioButtonId() gives the wrong RadioButton checked // when programmatically unchecking children radio buttons. Clearing all is the only option. mUsageRadioGroup.clearCheck(); if (mWillBeMasterKey) { mUsageNone.setChecked(true); } if (keyType == SupportedKeyType.ECC_P521 || keyType == SupportedKeyType.ECC_P256) { mUsageSignAndEncrypt.setEnabled(false); if (mWillBeMasterKey) { mUsageEncrypt.setEnabled(false); } } else { // need to enable if previously disabled for ECC masterkey mUsageEncrypt.setEnabled(true); mUsageSignAndEncrypt.setEnabled(true); } } @Override public void onNothingSelected(AdapterView<?> parent) { } }); return alertDialog; } @Override public void onStart() { super.onStart(); //super.onStart() is where dialog.show() is actually called on the underlying dialog, so we have to do it after this point AlertDialog d = (AlertDialog) getDialog(); if (d != null) { Button positiveButton = d.getButton(Dialog.BUTTON_POSITIVE); Button negativeButton = d.getButton(Dialog.BUTTON_NEGATIVE); positiveButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (mUsageRadioGroup.getCheckedRadioButtonId() == -1) { Toast.makeText(getActivity(), R.string.edit_key_select_usage, Toast.LENGTH_LONG).show(); return; } // noinspection unchecked SupportedKeyType keyType = ((Choice<SupportedKeyType>) mKeyTypeSpinner.getSelectedItem()) .getId(); Curve curve = null; Integer keySize = null; Algorithm algorithm = null; // set keysize & curve, for RSA & ECC respectively switch (keyType) { case RSA_2048: { keySize = 2048; break; } case RSA_3072: { keySize = 3072; break; } case RSA_4096: { keySize = 4096; break; } case ECC_P256: { curve = Curve.NIST_P256; break; } case ECC_P521: { curve = Curve.NIST_P521; break; } } // set algorithm switch (keyType) { case RSA_2048: case RSA_3072: case RSA_4096: { algorithm = Algorithm.RSA; break; } case ECC_P256: case ECC_P521: { if (mUsageEncrypt.isChecked()) { algorithm = Algorithm.ECDH; } else { algorithm = Algorithm.ECDSA; } break; } } // set flags int flags = 0; if (mWillBeMasterKey) { flags |= KeyFlags.CERTIFY_OTHER; } if (mUsageSign.isChecked()) { flags |= KeyFlags.SIGN_DATA; } else if (mUsageEncrypt.isChecked()) { flags |= KeyFlags.ENCRYPT_COMMS | KeyFlags.ENCRYPT_STORAGE; } else if (mUsageSignAndEncrypt.isChecked()) { flags |= KeyFlags.SIGN_DATA | KeyFlags.ENCRYPT_COMMS | KeyFlags.ENCRYPT_STORAGE; } long expiry; if (mNoExpiryCheckBox.isChecked()) { expiry = 0L; } else { Calendar selectedCal = Calendar.getInstance(TimeZone.getDefault()); //noinspection ResourceType selectedCal.set(mExpiryDatePicker.getYear(), mExpiryDatePicker.getMonth(), mExpiryDatePicker.getDayOfMonth()); // date picker uses default time zone, we need to convert to UTC selectedCal.setTimeZone(TimeZone.getTimeZone("UTC")); expiry = selectedCal.getTime().getTime() / 1000; } SaveKeyringParcel.SubkeyAdd newSubkey = new SaveKeyringParcel.SubkeyAdd(algorithm, keySize, curve, flags, expiry); mAlgorithmSelectedListener.onAlgorithmSelected(newSubkey); // finally, dismiss the dialogue dismiss(); } }); negativeButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { dismiss(); } }); } } private class TwoLineArrayAdapter extends ArrayAdapter<Choice<SupportedKeyType>> { public TwoLineArrayAdapter(Context context, int resource, List<Choice<SupportedKeyType>> objects) { super(context, resource, objects); } @Override public View getDropDownView(int position, View convertView, ViewGroup parent) { // inflate view if not given one if (convertView == null) { convertView = getActivity().getLayoutInflater().inflate(R.layout.two_line_spinner_dropdown_item, parent, false); } Choice c = this.getItem(position); TextView text1 = (TextView) convertView.findViewById(android.R.id.text1); TextView text2 = (TextView) convertView.findViewById(android.R.id.text2); text1.setText(c.getName()); text2.setText(Html.fromHtml(c.getDescription())); return convertView; } } }