/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settings;
import android.content.Context;
import android.content.res.Resources;
import android.os.AsyncResult;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.CheckBoxPreference;
import android.preference.PreferenceScreen;
import com.android.internal.telephony.Phone;
import com.android.internal.telephony.PhoneFactory;
import android.widget.Toast;
/**
* Implements the preference screen to enable/disable SIM lock and
* also the dialogs to change the SIM PIN. In the former case, enabling/disabling
* the SIM lock will prompt the user for the current PIN.
* In the Change PIN case, it prompts the user for old pin, new pin and new pin
* again before attempting to change it. Calls the SimCard interface to execute
* these operations.
*
*/
public class SimLockSettings extends PreferenceActivity
implements EditPinPreference.OnPinEnteredListener {
private static final int OFF_MODE = 0;
// State when enabling/disabling SIM lock
private static final int SIM_LOCK_MODE = 1;
// State when entering the old pin
private static final int SIM_OLD_MODE = 2;
// State when entering the new pin - first time
private static final int SIM_NEW_MODE = 3;
// State when entering the new pin - second time
private static final int SIM_REENTER_MODE = 4;
// Keys in xml file
private static final String PIN_DIALOG = "sim_pin";
private static final String PIN_TOGGLE = "sim_toggle";
// Keys in icicle
private static final String DIALOG_STATE = "dialogState";
private static final String DIALOG_PIN = "dialogPin";
private static final String DIALOG_ERROR = "dialogError";
private static final String ENABLE_TO_STATE = "enableState";
private static final int MIN_PIN_LENGTH = 4;
private static final int MAX_PIN_LENGTH = 8;
// Which dialog to show next when popped up
private int mDialogState = OFF_MODE;
private String mPin;
private String mOldPin;
private String mNewPin;
private String mError;
// Are we trying to enable or disable SIM lock?
private boolean mToState;
private Phone mPhone;
private EditPinPreference mPinDialog;
private CheckBoxPreference mPinToggle;
private Resources mRes;
// For async handler to identify request type
private static final int ENABLE_SIM_PIN_COMPLETE = 100;
private static final int CHANGE_SIM_PIN_COMPLETE = 101;
// For replies from SimCard interface
private Handler mHandler = new Handler() {
public void handleMessage(Message msg) {
AsyncResult ar = (AsyncResult) msg.obj;
switch (msg.what) {
case ENABLE_SIM_PIN_COMPLETE:
simLockChanged(ar.exception == null);
break;
case CHANGE_SIM_PIN_COMPLETE:
simPinChanged(ar.exception == null);
break;
}
return;
}
};
// For top-level settings screen to query
static boolean isSimLockEnabled() {
return PhoneFactory.getDefaultPhone().getSimCard().getSimLockEnabled();
}
static String getSummary(Context context) {
Resources res = context.getResources();
String summary = isSimLockEnabled()
? res.getString(R.string.sim_lock_on)
: res.getString(R.string.sim_lock_off);
return summary;
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.sim_lock_settings);
mPinDialog = (EditPinPreference) findPreference(PIN_DIALOG);
mPinToggle = (CheckBoxPreference) findPreference(PIN_TOGGLE);
if (savedInstanceState != null && savedInstanceState.containsKey(DIALOG_STATE)) {
mDialogState = savedInstanceState.getInt(DIALOG_STATE);
mPin = savedInstanceState.getString(DIALOG_PIN);
mError = savedInstanceState.getString(DIALOG_ERROR);
mToState = savedInstanceState.getBoolean(ENABLE_TO_STATE);
}
mPinDialog.setOnPinEnteredListener(this);
// Don't need any changes to be remembered
getPreferenceScreen().setPersistent(false);
mPhone = PhoneFactory.getDefaultPhone();
mRes = getResources();
}
@Override
protected void onResume() {
super.onResume();
mPinToggle.setChecked(mPhone.getSimCard().getSimLockEnabled());
if (mDialogState != OFF_MODE) {
showPinDialog();
} else {
// Prep for standard click on "Change PIN"
resetDialogState();
}
}
@Override
protected void onSaveInstanceState(Bundle out) {
// Need to store this state for slider open/close
// There is one case where the dialog is popped up by the preference
// framework. In that case, let the preference framework store the
// dialog state. In other cases, where this activity manually launches
// the dialog, store the state of the dialog.
if (mPinDialog.isDialogOpen()) {
out.putInt(DIALOG_STATE, mDialogState);
out.putString(DIALOG_PIN, mPinDialog.getEditText().getText().toString());
out.putString(DIALOG_ERROR, mError);
out.putBoolean(ENABLE_TO_STATE, mToState);
} else {
super.onSaveInstanceState(out);
}
}
private void showPinDialog() {
if (mDialogState == OFF_MODE) {
return;
}
setDialogValues();
mPinDialog.showPinDialog();
}
private void setDialogValues() {
mPinDialog.setText(mPin);
String message = "";
switch (mDialogState) {
case SIM_LOCK_MODE:
message = mRes.getString(R.string.sim_enter_pin);
mPinDialog.setDialogTitle(mToState
? mRes.getString(R.string.sim_enable_sim_lock)
: mRes.getString(R.string.sim_disable_sim_lock));
break;
case SIM_OLD_MODE:
message = mRes.getString(R.string.sim_enter_old);
mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
break;
case SIM_NEW_MODE:
message = mRes.getString(R.string.sim_enter_new);
mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
break;
case SIM_REENTER_MODE:
message = mRes.getString(R.string.sim_reenter_new);
mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
break;
}
if (mError != null) {
message = mError + "\n" + message;
mError = null;
}
mPinDialog.setDialogMessage(message);
}
public void onPinEntered(EditPinPreference preference, boolean positiveResult) {
if (!positiveResult) {
resetDialogState();
return;
}
mPin = preference.getText();
if (!reasonablePin(mPin)) {
// inject error message and display dialog again
mError = mRes.getString(R.string.sim_bad_pin);
showPinDialog();
return;
}
switch (mDialogState) {
case SIM_LOCK_MODE:
tryChangeSimLockState();
break;
case SIM_OLD_MODE:
mOldPin = mPin;
mDialogState = SIM_NEW_MODE;
mError = null;
mPin = null;
showPinDialog();
break;
case SIM_NEW_MODE:
mNewPin = mPin;
mDialogState = SIM_REENTER_MODE;
mPin = null;
showPinDialog();
break;
case SIM_REENTER_MODE:
if (!mPin.equals(mNewPin)) {
mError = mRes.getString(R.string.sim_pins_dont_match);
mDialogState = SIM_NEW_MODE;
mPin = null;
showPinDialog();
} else {
mError = null;
tryChangePin();
}
break;
}
}
public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
if (preference == mPinToggle) {
// Get the new, preferred state
mToState = mPinToggle.isChecked();
// Flip it back and pop up pin dialog
mPinToggle.setChecked(!mToState);
mDialogState = SIM_LOCK_MODE;
showPinDialog();
}
return true;
}
private void tryChangeSimLockState() {
// Try to change sim lock. If it succeeds, toggle the lock state and
// reset dialog state. Else inject error message and show dialog again.
Message callback = Message.obtain(mHandler, ENABLE_SIM_PIN_COMPLETE);
mPhone.getSimCard().setSimLockEnabled(mToState, mPin, callback);
}
private void simLockChanged(boolean success) {
if (success) {
mPinToggle.setChecked(mToState);
} else {
// TODO: I18N
Toast.makeText(this, mRes.getString(R.string.sim_lock_failed), Toast.LENGTH_SHORT)
.show();
}
resetDialogState();
}
private void simPinChanged(boolean success) {
if (!success) {
// TODO: I18N
Toast.makeText(this, mRes.getString(R.string.sim_change_failed),
Toast.LENGTH_SHORT)
.show();
} else {
Toast.makeText(this, mRes.getString(R.string.sim_change_succeeded),
Toast.LENGTH_SHORT)
.show();
}
resetDialogState();
}
private void tryChangePin() {
Message callback = Message.obtain(mHandler, CHANGE_SIM_PIN_COMPLETE);
mPhone.getSimCard().changeSimLockPassword(mOldPin,
mNewPin, callback);
}
private boolean reasonablePin(String pin) {
if (pin == null || pin.length() < MIN_PIN_LENGTH || pin.length() > MAX_PIN_LENGTH) {
return false;
} else {
return true;
}
}
private void resetDialogState() {
mError = null;
mDialogState = SIM_OLD_MODE; // Default for when Change PIN is clicked
mPin = "";
setDialogValues();
}
}
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