From 8373b451692a39abdfd12444241c016831e1a4a4 Mon Sep 17 00:00:00 2001
From: David Brown <dab@google.com>
Date: Mon, 20 Jun 2011 12:38:45 -0700
Subject: [PATCH] Add "emergency call" button to CryptKeeper

This allows you to make an emergency call without needing to decrypt
your device first.

The exact appearance of the button, and the two possible icons shown to
the left of the text, are taken directly from the corresponding
framework resources (see keyguard_screen_*.xml, ic_emergency.png, and
stat_sys_phone_call.png.)

Also, the code in CryptKeeper.java for updating the state of, and
handling clicks from, the "Emergency call" button is mostly duplicated
from the corresponding code in LockPatternUtils and
LockPatternKeyguardView under frameworks/base.

Bug: 4494186
Change-Id: I36a713fdbc3281a7ba46762d47d5b61fb3cd194d
---
 res/drawable-hdpi/ic_emergency.png         | Bin 0 -> 1045 bytes
 res/drawable-hdpi/stat_sys_phone_call.png  | Bin 0 -> 2371 bytes
 res/drawable-mdpi/ic_emergency.png         | Bin 0 -> 900 bytes
 res/drawable-mdpi/stat_sys_phone_call.png  | Bin 0 -> 773 bytes
 res/layout/crypt_keeper_password_entry.xml |  14 +++-
 res/values/strings.xml                     |   5 ++
 src/com/android/settings/CryptKeeper.java  |  79 ++++++++++++++++++++-
 7 files changed, 96 insertions(+), 2 deletions(-)
 create mode 100644 res/drawable-hdpi/ic_emergency.png
 create mode 100755 res/drawable-hdpi/stat_sys_phone_call.png
 create mode 100755 res/drawable-mdpi/ic_emergency.png
 create mode 100644 res/drawable-mdpi/stat_sys_phone_call.png

diff --git a/res/drawable-hdpi/ic_emergency.png b/res/drawable-hdpi/ic_emergency.png
new file mode 100644
index 0000000000000000000000000000000000000000..89c05e360493aa9668e57e5675e37d63eaa23e50
GIT binary patch
literal 1045
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P00000NkvXXu0mjf@OkEn

literal 0
HcmV?d00001

diff --git a/res/drawable-hdpi/stat_sys_phone_call.png b/res/drawable-hdpi/stat_sys_phone_call.png
new file mode 100755
index 0000000000000000000000000000000000000000..9b5f07576cc508f6f182c2fd6bd374abf60c4f49
GIT binary patch
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literal 0
HcmV?d00001

diff --git a/res/drawable-mdpi/ic_emergency.png b/res/drawable-mdpi/ic_emergency.png
new file mode 100755
index 0000000000000000000000000000000000000000..c6faf1e9e43085c40e341fc9c4b43d83d520b1ec
GIT binary patch
literal 900
zcmV-~1AF|5P)<h;3K|Lk000e1NJLTq000#L000#T1^@s6sTZY|0000PbVXQnQ*UN;
zcVTj606}DLVr3vnZDD6+Qe|Oed2z{QJOBU#CP_p=RCwB)Ra;1uK@|Sx--}mFOG(ry
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literal 0
HcmV?d00001

diff --git a/res/drawable-mdpi/stat_sys_phone_call.png b/res/drawable-mdpi/stat_sys_phone_call.png
new file mode 100644
index 0000000000000000000000000000000000000000..c44d0620f7f4037aad63b90eafad68dd72aa7090
GIT binary patch
literal 773
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Dh!<&+

literal 0
HcmV?d00001

diff --git a/res/layout/crypt_keeper_password_entry.xml b/res/layout/crypt_keeper_password_entry.xml
index a5193ceae2f..60dcf6a2910 100644
--- a/res/layout/crypt_keeper_password_entry.xml
+++ b/res/layout/crypt_keeper_password_entry.xml
@@ -42,4 +42,16 @@
        android:textColor="#ffffffff"
     />
 
-</LinearLayout>
\ No newline at end of file
+   <!-- Emergency call button.
+        Text and icon are set by CryptKeeper.updateEmergencyCallButtonState() -->
+   <Button android:id="@+id/emergencyCallButton"
+       android:layout_width="wrap_content"
+       android:layout_height="wrap_content"
+       android:layout_gravity="left"
+       android:layout_marginTop="10dip"
+       style="@*android:style/Widget.Button.Transparent"
+       android:textSize="14sp"
+       android:drawablePadding="6dip"
+       />
+
+</LinearLayout>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index f7318bd19c4..674866f09a9 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -3481,4 +3481,9 @@ found in the list of installed applications.</string>
     <!-- Label displaying current network data usage warning threshold. [CHAR LIMIT=18] -->
     <string name="data_usage_sweep_warning"><font size="32"><xliff:g id="number" example="128">%1$s</xliff:g></font> <font size="12"><xliff:g id="unit" example="KB">%2$s</xliff:g></font>\n<font size="12">warning</font></string>
 
+    <!-- Button at the bottom of the CryptKeeper screen to make an emergency call. -->
+    <string name="cryptkeeper_emergency_call">Emergency call</string>
+    <!-- Button at the bottom of the CryptKeeper screen that lets the user return to a call -->
+    <string name="cryptkeeper_return_to_call">Return to call</string>
+
 </resources>
diff --git a/src/com/android/settings/CryptKeeper.java b/src/com/android/settings/CryptKeeper.java
index 20bf7cee2e5..612f4c05bce 100644
--- a/src/com/android/settings/CryptKeeper.java
+++ b/src/com/android/settings/CryptKeeper.java
@@ -16,6 +16,7 @@
 
 package com.android.settings;
 
+import com.android.internal.telephony.ITelephony;
 import com.android.internal.widget.PasswordEntryKeyboardHelper;
 import com.android.internal.widget.PasswordEntryKeyboardView;
 
@@ -33,9 +34,11 @@ import android.os.Handler;
 import android.os.IBinder;
 import android.os.Message;
 import android.os.PowerManager;
+import android.os.RemoteException;
 import android.os.ServiceManager;
 import android.os.SystemProperties;
 import android.os.storage.IMountService;
+import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.Log;
@@ -62,6 +65,9 @@ public class CryptKeeper extends Activity implements TextView.OnEditorActionList
     private static final int COOL_DOWN_ATTEMPTS = 10;
     private static final int COOL_DOWN_INTERVAL = 30; // 30 seconds
 
+    // Intent action for launching the Emergency Dialer activity.
+    static final String ACTION_EMERGENCY_DIAL = "com.android.phone.EmergencyDialer.DIAL";
+
     private int mCooldown;
     PowerManager.WakeLock mWakeLock;
     private EditText mPasswordEntry;
@@ -347,6 +353,8 @@ public class CryptKeeper extends Activity implements TextView.OnEditorActionList
                     keyboardView, mPasswordEntry, false);
             keyboardHelper.setKeyboardMode(PasswordEntryKeyboardHelper.KEYBOARD_MODE_ALPHA);
         }
+
+        updateEmergencyCallButtonState();
     }
 
     private IMountService getMountService() {
@@ -381,4 +389,73 @@ public class CryptKeeper extends Activity implements TextView.OnEditorActionList
         }
         return false;
     }
-}
\ No newline at end of file
+
+    //
+    // Code to update the state of, and handle clicks from, the "Emergency call" button.
+    //
+    // This code is mostly duplicated from the corresponding code in
+    // LockPatternUtils and LockPatternKeyguardView under frameworks/base.
+    //
+
+    private void updateEmergencyCallButtonState() {
+        Button button = (Button) findViewById(R.id.emergencyCallButton);
+        // The button isn't present at all in some configurations.
+        if (button == null) return;
+
+        if (isEmergencyCallCapable()) {
+            button.setVisibility(View.VISIBLE);
+            button.setOnClickListener(new View.OnClickListener() {
+                    public void onClick(View v) {
+                        takeEmergencyCallAction();
+                    }
+                });
+        } else {
+            button.setVisibility(View.GONE);
+            return;
+        }
+
+        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.cryptkeeper_return_to_call;
+            int phoneCallIcon = R.drawable.stat_sys_phone_call;
+            button.setCompoundDrawablesWithIntrinsicBounds(phoneCallIcon, 0, 0, 0);
+        } else {
+            textId = R.string.cryptkeeper_emergency_call;
+            int emergencyIcon = R.drawable.ic_emergency;
+            button.setCompoundDrawablesWithIntrinsicBounds(emergencyIcon, 0, 0, 0);
+        }
+        button.setText(textId);
+    }
+
+    private boolean isEmergencyCallCapable() {
+        return getResources().getBoolean(com.android.internal.R.bool.config_voice_capable);
+    }
+
+    private void takeEmergencyCallAction() {
+        if (TelephonyManager.getDefault().getCallState() == TelephonyManager.CALL_STATE_OFFHOOK) {
+            resumeCall();
+        } else {
+            launchEmergencyDialer();
+        }
+    }
+
+    private void resumeCall() {
+        ITelephony phone = ITelephony.Stub.asInterface(ServiceManager.checkService("phone"));
+        if (phone != null) {
+            try {
+                phone.showCallScreen();
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling ITelephony service: " + e);
+            }
+        }
+    }
+
+    private void launchEmergencyDialer() {
+        Intent intent = new Intent(ACTION_EMERGENCY_DIAL);
+        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
+                        | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
+        startActivity(intent);
+    }
+}