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/*
* 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.keyguard;
import android.content.Context;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.PowerManager;
import android.os.SystemClock;
import android.os.UserHandle;
import android.telecom.TelecomManager;
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 Intent INTENT_EMERGENCY_DIAL = new Intent()
.setAction("com.android.phone.EmergencyDialer.DIAL")
.setPackage("com.android.phone")
.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
| Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS
| Intent.FLAG_ACTIVITY_CLEAR_TASK);
KeyguardUpdateMonitorCallback mInfoCallback = new KeyguardUpdateMonitorCallback() {
@Override
public void onSimStateChanged(int subId, int slotId, State simState) {
updateEmergencyCallButton();
}
@Override
public void onPhoneStateChanged(int phoneState) {
updateEmergencyCallButton();
}
};
public interface EmergencyButtonCallback {
public void onEmergencyButtonClickedWhenInCall();
}
private LockPatternUtils mLockPatternUtils;
private PowerManager mPowerManager;
private EmergencyButtonCallback mEmergencyButtonCallback;
private final boolean mIsVoiceCapable;
private final boolean mEnableEmergencyCallWhileSimLocked;
public EmergencyButton(Context context) {
this(context, null);
}
public EmergencyButton(Context context, AttributeSet attrs) {
super(context, attrs);
mIsVoiceCapable = context.getResources().getBoolean(
com.android.internal.R.bool.config_voice_capable);
mEnableEmergencyCallWhileSimLocked = mContext.getResources().getBoolean(
com.android.internal.R.bool.config_enable_emergency_call_while_sim_locked);
}
@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();
}
});
updateEmergencyCallButton();
}
@Override
protected void onConfigurationChanged(Configuration newConfig) {
super.onConfigurationChanged(newConfig);
updateEmergencyCallButton();
}
/**
* 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 (isInCall()) {
resumeCall();
if (mEmergencyButtonCallback != null) {
mEmergencyButtonCallback.onEmergencyButtonClickedWhenInCall();
}
} else {
KeyguardUpdateMonitor.getInstance(mContext).reportEmergencyCallAction(
true /* bypassHandler */);
getContext().startActivityAsUser(INTENT_EMERGENCY_DIAL,
new UserHandle(KeyguardUpdateMonitor.getCurrentUser()));
}
}
private void updateEmergencyCallButton() {
boolean visible = false;
if (mIsVoiceCapable) {
// Emergency calling requires voice capability.
if (isInCall()) {
visible = true; // always show "return to call" if phone is off-hook
} else {
final boolean simLocked = KeyguardUpdateMonitor.getInstance(mContext)
.isSimPinVoiceSecure();
if (simLocked) {
// Some countries can't handle emergency calls while SIM is locked.
visible = mEnableEmergencyCallWhileSimLocked;
} else {
// Only show if there is a secure screen (pin/pattern/SIM pin/SIM puk);
visible = mLockPatternUtils.isSecure(KeyguardUpdateMonitor.getCurrentUser());
}
}
}
if (visible) {
setVisibility(View.VISIBLE);
int textId;
if (isInCall()) {
textId = com.android.internal.R.string.lockscreen_return_to_call;
} else {
textId = com.android.internal.R.string.lockscreen_emergency_call;
}
setText(textId);
} else {
setVisibility(View.GONE);
}
}
public void setCallback(EmergencyButtonCallback callback) {
mEmergencyButtonCallback = callback;
}
/**
* Resumes a call in progress.
*/
private void resumeCall() {
getTelecommManager().showInCallScreen(false);
}
/**
* @return {@code true} if there is a call currently in progress.
*/
private boolean isInCall() {
return getTelecommManager().isInCall();
}
private TelecomManager getTelecommManager() {
return (TelecomManager) mContext.getSystemService(Context.TELECOM_SERVICE);
}
}
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