Merge "Fix 2336057: Provide a way for the user to return to a call from LockScreen."

package com.android.internal.widget;

import android.app.DevicePolicyManager;

import android.content.ComponentName;

import android.content.ContentResolver;

import android.content.Context;

import android.os.RemoteException;

import android.os.ServiceManager;

import android.os.SystemClock;

import android.provider.Settings;

import android.security.MessageDigest;

import android.telephony.TelephonyManager;

import android.text.TextUtils;

import android.util.Log;

import android.widget.Button;

import com.android.internal.R;

import com.android.internal.telephony.ITelephony;

import com.google.android.collect.Lists;

import java.io.FileNotFoundException;

            || (mode == MODE_PIN || mode == MODE_PASSWORD) && savedPasswordExists();

        return secure;

    }

    /**

     * Sets the text on the emergency button to indicate what action will be taken.

     * If there's currently a call in progress, the button will take them to the call

     * @param button the button to update

     */

    public void updateEmergencyCallButtonState(Button button) {

        int newState = TelephonyManager.getDefault().getCallState();

        int textId;

        if (newState == TelephonyManager.CALL_STATE_OFFHOOK) {

            // show "return to call" text and show phone icon

            textId = R.string.lockscreen_return_to_call;

            int phoneCallIcon = R.drawable.stat_sys_phone_call;

            button.setCompoundDrawablesWithIntrinsicBounds(phoneCallIcon, 0, 0, 0);

        } else {

            textId = R.string.lockscreen_emergency_call;

            int emergencyIcon = R.drawable.ic_emergency;

            button.setCompoundDrawablesWithIntrinsicBounds(emergencyIcon, 0, 0, 0);

        }

        button.setText(textId);

    }

    /**

     * Resumes a call in progress. Typically launched from the EmergencyCall button

     * on various lockscreens.

     *

     * @return true if we were able to tell InCallScreen to show.

     */

    public boolean resumeCall() {

        ITelephony phone = ITelephony.Stub.asInterface(ServiceManager.checkService("phone"));

        try {

            if (phone != null && phone.showCallScreen()) {

                return true;

            }

        } catch (RemoteException e) {

            // What can we do?

        }

        return false;

    }

}

    <string name="lockscreen_pattern_instructions">Draw pattern to unlock</string>

    <!-- Button at the bottom of the unlock screen to make an emergency call. -->

    <string name="lockscreen_emergency_call">Emergency call</string>

    <!-- Button at the bottom of the unlock screen that lets the user return to a call -->

    <string name="lockscreen_return_to_call">Return to call</string>

    <!-- Shown to confirm that the user entered their lock pattern correctly. -->

    <string name="lockscreen_pattern_correct">Correct!</string>

    <!-- On the unlock pattern screen, shown when the user enters the wrong lock pattern and must try again. -->