设置源码解析--Uim/Sim卡锁定

 转载请注明出处：http://blog.csdn.net/droyon/article/details/18669917

功能入口：android手机--〉设置--〉安全--〉设置SIM卡锁定。

主页面如下所示：



一、操作说明：

1、点击锁定sim卡，会弹出Dialog，让用户输入pin码，点击确定会通过Ril到达moderm，进而将卡锁定。在重新开机/飞行模式等初始化卡时，需要输入正确的pin码才能使用与卡

相关的操作。如果想取消pin卡锁定，则反勾选checkBox，输入正确的pin码即可。如下图所示：


  


 2、如果pin码设定成功，那么可以通过第二个选项进行pin码的更改。更改pin码需要经过，输入旧pin码，输入新pin码，再次输入新pin码等步骤。如下图：


 

 


 

功能点解析：

1、pin码操作需要设定的状态。

private static final int OFF_MODE = 0;
// State when enabling/disabling ICC lock
private static final int ICC_LOCK_MODE = 1;
// State when entering the old pin
private static final int ICC_OLD_MODE = 2;
// State when entering the new pin - first time
private static final int ICC_NEW_MODE = 3;
// State when entering the new pin - second time
private static final int ICC_REENTER_MODE = 4;

OFF_MODE状态代表关闭状态，也是无操作状态。

ICC_LOCK_MODE：进行pin码设定与解锁的状态。

ICC_OLD_MODE：更改pin码，输入旧pin码的状态。

ICC_NEW_MODE：更改pin码，输入新pin码的状态。

ICC_REENTER_MODE：更改pni码，再次输入pin码的状态。

2、全局的dialog只有一个。

在onResume方法中会执行如下代码：

protected void onResume() {
super.onResume();

// ACTION_SIM_STATE_CHANGED is sticky, so we'll receive current state after this call,
// which will call updatePreferences().
final IntentFilter filter = new IntentFilter(TelephonyIntents.ACTION_SIM_STATE_CHANGED);
registerReceiver(mSimStateReceiver, filter);

if (mDialogState != OFF_MODE) {
showPinDialog();
} else {
// Prep for standard click on "Change PIN"
resetDialogState();
}
}

第一次进入此界面，mDialogState为OFF_MODE，故而，程序会执行resetDialogState方法：

private void resetDialogState() {
mError = null;
mDialogState = ICC_OLD_MODE; // Default for when Change PIN is clicked
mPin = "";
setDialogValues();
mDialogState = OFF_MODE;
}

重置Dialog状态。Dialog的状态包括，Dialog的title，以及message。

private void setDialogValues() {
mPinDialog.setText(mPin);
String message = "";
switch (mDialogState) {
case ICC_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 ICC_OLD_MODE:
message = mRes.getString(R.string.sim_enter_old);
mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
break;
case ICC_NEW_MODE:
message = mRes.getString(R.string.sim_enter_new);
mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
break;
case ICC_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);
}

也就是说当我们什么都不做时，默认的title和message为mDialogState == ICC_OLD_MODE的状态。

3、piin码设定与解锁回掉处理逻辑：

private Handler mHandler = new Handler() {
public void handleMessage(Message msg) {
AsyncResult ar = (AsyncResult) msg.obj;
switch (msg.what) {
case MSG_ENABLE_ICC_PIN_COMPLETE:
iccLockChanged(ar.exception == null);
break;
case MSG_CHANGE_ICC_PIN_COMPLETE:
iccPinChanged(ar.exception == null);
break;
case MSG_SIM_STATE_CHANGED:
updatePreferences();
break;
}

return;
}
};

这是一个运行在主线程的Handler，主要处理三类message。这三类message的what分别为：MSG_ENABLE_ICC_PIN_COMPLETE，MSG_CHANGE_ICC_PIN_COMPLETE，MSG_SIM_STATE_CANGED。

 

MSG_ENABLE_ICC_PIN_COMPLETE：开启/关闭  sim锁定

private void iccLockChanged(boolean success) {
if (success) {
mPinToggle.setChecked(mToState);
} else {
Toast.makeText(this, mRes.getString(R.string.sim_lock_failed), Toast.LENGTH_SHORT)
.show();
}
resetDialogState();
}

如果sucess为true，则说明成功的进行了锁定sim卡或者解锁sim卡。更新mPinToggle的check状态。如果为false，说明操作失败，给出toast提示。

success 为true的条件为：ar.exception == null。

MSG_CHANGE_IC_PIN_COMPLETE：更改pin码的message。

private void iccPinChanged(boolean success) {
if (!success) {
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();
}

同样的，success为true的条件和上一步雷同。无论成功还是失败，给出提示，并且resetDialogState（）；

4、pin码条件：

private boolean reasonablePin(String pin) {
if (pin == null || pin.length() < MIN_PIN_LENGTH || pin.length() > MAX_PIN_LENGTH) {
return false;
} else {
return true;
}
}

private static final int MIN_PIN_LENGTH = 4;
private static final int MAX_PIN_LENGTH = 8;

也就是说pin码是大于4个字符，小于8个字符。

5、得到当前pin是否锁定的状态。

mPhone.getIccCard().getIccLockEnabled()

6、pin状态更迭

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 ICC_LOCK_MODE:
tryChangeIccLockState();
break;
case ICC_OLD_MODE:
mOldPin = mPin;
mDialogState = ICC_NEW_MODE;
mError = null;
mPin = null;
showPinDialog();
break;
case ICC_NEW_MODE:
mNewPin = mPin;
mDialogState = ICC_REENTER_MODE;
mPin = null;
showPinDialog();
break;
case ICC_REENTER_MODE:
if (!mPin.equals(mNewPin)) {
mError = mRes.getString(R.string.sim_pins_dont_match);
mDialogState = ICC_NEW_MODE;
mPin = null;
showPinDialog();
} else {
mError = null;
tryChangePin();
}
break;
}
}

当我们输入的过程中，进行mDialogState状态的切换，并且执行showDialog（）。

7、锁定sim的pin码。

private void tryChangeIccLockState() {
// Try to change icc 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, MSG_ENABLE_ICC_PIN_COMPLETE);
mPhone.getIccCard().setIccLockEnabled(mToState, mPin, callback);

}

初始化一个Message，然后执行mPhone.getIccCard().setIccLockEnabled，然后将Message传递下去。这个方法会一直执行到Ril，然后到达moderm，处理完毕会执行Message回调。关于此回调Message的处理，我们在上面的Handler中已经说过了。

8、更改sim的pin码。

private void tryChangePin() {
Message callback = Message.obtain(mHandler, MSG_CHANGE_ICC_PIN_COMPLETE);
mPhone.getIccCard().changeIccLockPassword(mOldPin,
mNewPin, callback);
}

同理。

主要说明就到这里，下面附   源码：

IccLockSettings.java

/*
* 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.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.res.Resources;
import android.os.AsyncResult;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.CheckBoxPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceScreen;
import android.widget.Toast;

import com.android.internal.telephony.Phone;
import com.android.internal.telephony.PhoneFactory;
import com.android.internal.telephony.TelephonyIntents;

/**
* Implements the preference screen to enable/disable ICC lock and
* also the dialogs to change the ICC PIN. In the former case, enabling/disabling
* the ICC 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 IccLockSettings extends PreferenceActivity
implements EditPinPreference.OnPinEnteredListener {

private static final int OFF_MODE = 0;
// State when enabling/disabling ICC lock
private static final int ICC_LOCK_MODE = 1;
// State when entering the old pin
private static final int ICC_OLD_MODE = 2;
// State when entering the new pin - first time
private static final int ICC_NEW_MODE = 3;
// State when entering the new pin - second time
private static final int ICC_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";

// Save and restore inputted PIN code when configuration changed
// (ex. portrait<-->landscape) during change PIN code
private static final String OLD_PINCODE = "oldPinCode";
private static final String NEW_PINCODE = "newPinCode";

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 ICC 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 MSG_ENABLE_ICC_PIN_COMPLETE = 100;
private static final int MSG_CHANGE_ICC_PIN_COMPLETE = 101;
private static final int MSG_SIM_STATE_CHANGED = 102;

// For replies from IccCard interface
private Handler mHandler = new Handler() {
public void handleMessage(Message msg) {
AsyncResult ar = (AsyncResult) msg.obj;
switch (msg.what) {
case MSG_ENABLE_ICC_PIN_COMPLETE:
iccLockChanged(ar.exception == null);
break;
case MSG_CHANGE_ICC_PIN_COMPLETE:
iccPinChanged(ar.exception == null);
break;
case MSG_SIM_STATE_CHANGED:
updatePreferences();
break;
}

return;
}
};

private final BroadcastReceiver mSimStateReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
final String action = intent.getAction();
if (TelephonyIntents.ACTION_SIM_STATE_CHANGED.equals(action)) {
mHandler.sendMessage(mHandler.obtainMessage(MSG_SIM_STATE_CHANGED));
}
}
};

// For top-level settings screen to query
static boolean isIccLockEnabled() {
return PhoneFactory.getDefaultPhone().getIccCard().getIccLockEnabled();
}

static String getSummary(Context context) {
Resources res = context.getResources();
String summary = isIccLockEnabled()
? 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);

if (Utils.isMonkeyRunning()) {
finish();
return;
}

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);

// Restore inputted PIN code
switch (mDialogState) {
case ICC_NEW_MODE:
mOldPin = savedInstanceState.getString(OLD_PINCODE);
break;

case ICC_REENTER_MODE:
mOldPin = savedInstanceState.getString(OLD_PINCODE);
mNewPin = savedInstanceState.getString(NEW_PINCODE);
break;

case ICC_LOCK_MODE:
case ICC_OLD_MODE:
default:
break;
}
}

mPinDialog.setOnPinEnteredListener(this);

// Don't need any changes to be remembered
getPreferenceScreen().setPersistent(false);

mPhone = PhoneFactory.getDefaultPhone();
mRes = getResources();
updatePreferences();
}

private void updatePreferences() {
mPinToggle.setChecked(mPhone.getIccCard().getIccLockEnabled());
}

@Override
protected void onResume() {
super.onResume();

// ACTION_SIM_STATE_CHANGED is sticky, so we'll receive current state after this call,
// which will call updatePreferences().
final IntentFilter filter = new IntentFilter(TelephonyIntents.ACTION_SIM_STATE_CHANGED);
registerReceiver(mSimStateReceiver, filter);

if (mDialogState != OFF_MODE) {
showPinDialog();
} else {
// Prep for standard click on "Change PIN"
resetDialogState();
}
}

@Override
protected void onPause() {
super.onPause();
unregisterReceiver(mSimStateReceiver);
}

@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);

// Save inputted PIN code
switch (mDialogState) {
case ICC_NEW_MODE:
out.putString(OLD_PINCODE, mOldPin);
break;

case ICC_REENTER_MODE:
out.putString(OLD_PINCODE, mOldPin);
out.putString(NEW_PINCODE, mNewPin);
break;

case ICC_LOCK_MODE:
case ICC_OLD_MODE:
default:
break;
}
} 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 ICC_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 ICC_OLD_MODE:
message = mRes.getString(R.string.sim_enter_old);
mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
break;
case ICC_NEW_MODE:
message = mRes.getString(R.string.sim_enter_new);
mPinDialog.setDialogTitle(mRes.getString(R.string.sim_change_pin));
break;
case ICC_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 ICC_LOCK_MODE:
tryChangeIccLockState();
break;
case ICC_OLD_MODE:
mOldPin = mPin;
mDialogState = ICC_NEW_MODE;
mError = null;
mPin = null;
showPinDialog();
break;
case ICC_NEW_MODE:
mNewPin = mPin;
mDialogState = ICC_REENTER_MODE;
mPin = null;
showPinDialog();
break;
case ICC_REENTER_MODE:
if (!mPin.equals(mNewPin)) {
mError = mRes.getString(R.string.sim_pins_dont_match);
mDialogState = ICC_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 = ICC_LOCK_MODE;
showPinDialog();
} else if (preference == mPinDialog) {
mDialogState = ICC_OLD_MODE;
return false;
}
return true;
}

private void tryChangeIccLockState() {
// Try to change icc 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, MSG_ENABLE_ICC_PIN_COMPLETE);
mPhone.getIccCard().setIccLockEnabled(mToState, mPin, callback);

}

private void iccLockChanged(boolean success) {
if (success) {
mPinToggle.setChecked(mToState);
} else {
Toast.makeText(this, mRes.getString(R.string.sim_lock_failed), Toast.LENGTH_SHORT)
.show();
}
resetDialogState();
}

private void iccPinChanged(boolean success) {
if (!success) {
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, MSG_CHANGE_ICC_PIN_COMPLETE);
mPhone.getIccCard().changeIccLockPassword(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 = ICC_OLD_MODE; // Default for when Change PIN is clicked
mPin = "";
setDialogValues();
mDialogState = OFF_MODE;
}
}