| /* |
| * 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.internal.policy.impl.keyguard; |
| |
| import android.content.Context; |
| import android.content.Intent; |
| import android.os.PowerManager; |
| import android.os.SystemClock; |
| import android.telephony.TelephonyManager; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.widget.Button; |
| |
| import com.android.internal.telephony.IccCardConstants.State; |
| import com.android.internal.widget.LockPatternUtils; |
| |
| /** |
| * This class implements a smart emergency button that updates itself based |
| * on telephony state. When the phone is idle, it is an emergency call button. |
| * When there's a call in progress, it presents an appropriate message and |
| * allows the user to return to the call. |
| */ |
| public class EmergencyButton extends Button { |
| |
| private static final int EMERGENCY_CALL_TIMEOUT = 10000; // screen timeout after starting e.d. |
| private static final String ACTION_EMERGENCY_DIAL = "com.android.phone.EmergencyDialer.DIAL"; |
| |
| KeyguardUpdateMonitorCallback mInfoCallback = new KeyguardUpdateMonitorCallback() { |
| |
| @Override |
| public void onSimStateChanged(State simState) { |
| int phoneState = KeyguardUpdateMonitor.getInstance(mContext).getPhoneState(); |
| updateEmergencyCallButton(simState, phoneState); |
| } |
| |
| void onPhoneStateChanged(int phoneState) { |
| State simState = KeyguardUpdateMonitor.getInstance(mContext).getSimState(); |
| updateEmergencyCallButton(simState, phoneState); |
| }; |
| }; |
| private LockPatternUtils mLockPatternUtils; |
| private PowerManager mPowerManager; |
| |
| public EmergencyButton(Context context) { |
| this(context, null); |
| } |
| |
| public EmergencyButton(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| @Override |
| protected void onAttachedToWindow() { |
| super.onAttachedToWindow(); |
| KeyguardUpdateMonitor.getInstance(mContext).registerCallback(mInfoCallback); |
| } |
| |
| @Override |
| protected void onDetachedFromWindow() { |
| super.onDetachedFromWindow(); |
| KeyguardUpdateMonitor.getInstance(mContext).removeCallback(mInfoCallback); |
| } |
| |
| @Override |
| protected void onFinishInflate() { |
| super.onFinishInflate(); |
| mLockPatternUtils = new LockPatternUtils(mContext); |
| mPowerManager = (PowerManager) mContext.getSystemService(Context.POWER_SERVICE); |
| setOnClickListener(new OnClickListener() { |
| public void onClick(View v) { |
| takeEmergencyCallAction(); |
| } |
| }); |
| int phoneState = KeyguardUpdateMonitor.getInstance(mContext).getPhoneState(); |
| State simState = KeyguardUpdateMonitor.getInstance(mContext).getSimState(); |
| updateEmergencyCallButton(simState, phoneState); |
| } |
| |
| /** |
| * Shows the emergency dialer or returns the user to the existing call. |
| */ |
| public void takeEmergencyCallAction() { |
| // TODO: implement a shorter timeout once new PowerManager API is ready. |
| // should be the equivalent to the old userActivity(EMERGENCY_CALL_TIMEOUT) |
| mPowerManager.userActivity(SystemClock.uptimeMillis(), true); |
| if (TelephonyManager.getDefault().getCallState() |
| == TelephonyManager.CALL_STATE_OFFHOOK) { |
| mLockPatternUtils.resumeCall(); |
| } else { |
| Intent intent = new Intent(ACTION_EMERGENCY_DIAL); |
| intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK |
| | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS); |
| getContext().startActivity(intent); |
| } |
| } |
| |
| private void updateEmergencyCallButton(State simState, int phoneState) { |
| boolean enabled = false; |
| if (phoneState == TelephonyManager.CALL_STATE_OFFHOOK) { |
| enabled = true; // always show "return to call" if phone is off-hook |
| } else if (mLockPatternUtils.isEmergencyCallCapable()) { |
| boolean simLocked = KeyguardUpdateMonitor.getInstance(mContext).isSimLocked(); |
| if (simLocked) { |
| // Some countries can't handle emergency calls while SIM is locked. |
| enabled = mLockPatternUtils.isEmergencyCallEnabledWhileSimLocked(); |
| } else { |
| // True if we need to show a secure screen (pin/pattern/SIM pin/SIM puk); |
| // hides emergency button on "Slide" screen if device is not secure. |
| enabled = mLockPatternUtils.isSecure(); |
| } |
| } |
| mLockPatternUtils.updateEmergencyCallButtonState(this, phoneState, enabled, |
| KeyguardViewManager.USE_UPPER_CASE, false); |
| } |
| |
| } |