Use Drawer in Settings app

- get rid of PreferenceActivity as much as we can and use fragments instead
- add Drawer widget
- add Dashboard high level entry into the Drawer (but this is work in progress and would be done in another CL)
- add bypass of fragment's Header  validation when launched from the Drawer but *force* validation if external
call thru an Intent

Be aware that WifiPickerActivity should remain for now a PreferenceActivity. It is used by SetupWizard and should
not trigger running the SettingsActivity's header building code. SetupWizard is a Home during the provisionnig process
and then deactivate itself as a Home but would make the Home header to appear in the Drawer (because momentarily we
would have two Home).

Also, verified that:

- the WiFi settings still work when called from SetupWizard
- when you have multiple Launchers, the Home header will appear in the list of Headers in the Drawer

Change-Id: I407a5e0fdd843ad7615d3d511c416a44e3d97c90

src/com/android/settings/ApnSettings.java

@@ -33,12 +33,12 @@ import android.os.HandlerThread;
 import android.os.Looper;
 import android.os.Message;
 import android.preference.Preference;
-import android.preference.PreferenceActivity;
 import android.preference.PreferenceGroup;
 import android.preference.PreferenceScreen;
 import android.provider.Telephony;
 import android.util.Log;
 import android.view.Menu;
+import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.widget.Toast;
 
@@ -49,7 +49,7 @@ import com.android.internal.telephony.TelephonyProperties;
 
 import java.util.ArrayList;
 
-public class ApnSettings extends PreferenceActivity implements
+public class ApnSettings extends SettingsPreferenceFragment implements
         Preference.OnPreferenceChangeListener {
     static final String TAG = "ApnSettings";
 
@@ -116,7 +116,7 @@ public class ApnSettings extends PreferenceActivity implements
     }
 
     @Override
-    protected void onCreate(Bundle icicle) {
+    public void onCreate(Bundle icicle) {
         super.onCreate(icicle);
 
         addPreferencesFromResource(R.xml.apn_settings);
@@ -127,10 +127,10 @@ public class ApnSettings extends PreferenceActivity implements
     }
 
     @Override
-    protected void onResume() {
+    public void onResume() {
         super.onResume();
 
-        registerReceiver(mMobileStateReceiver, mMobileStateFilter);
+        getActivity().registerReceiver(mMobileStateReceiver, mMobileStateFilter);
 
         if (!mRestoreDefaultApnMode) {
             fillList();
@@ -140,14 +140,14 @@ public class ApnSettings extends PreferenceActivity implements
     }
 
     @Override
-    protected void onPause() {
+    public void onPause() {
         super.onPause();
 
-        unregisterReceiver(mMobileStateReceiver);
+        getActivity().unregisterReceiver(mMobileStateReceiver);
     }
 
     @Override
-    protected void onDestroy() {
+    public void onDestroy() {
         super.onDestroy();
 
         if (mRestoreDefaultApnThread != null) {
@@ -178,7 +178,7 @@ public class ApnSettings extends PreferenceActivity implements
                 String key = cursor.getString(ID_INDEX);
                 String type = cursor.getString(TYPES_INDEX);
 
-                ApnPreference pref = new ApnPreference(this);
+                ApnPreference pref = new ApnPreference(getActivity());
 
                 pref.setKey(key);
                 pref.setTitle(name);
@@ -207,8 +207,8 @@ public class ApnSettings extends PreferenceActivity implements
     }
 
     @Override
-    public boolean onCreateOptionsMenu(Menu menu) {
-        super.onCreateOptionsMenu(menu);
+    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
+        super.onCreateOptionsMenu(menu, inflater);
         menu.add(0, MENU_NEW, 0,
                 getResources().getString(R.string.menu_new))
                 .setIcon(android.R.drawable.ic_menu_add)
@@ -216,7 +216,6 @@ public class ApnSettings extends PreferenceActivity implements
         menu.add(0, MENU_RESTORE, 0,
                 getResources().getString(R.string.menu_restore))
                 .setIcon(android.R.drawable.ic_menu_upload);
-        return true;
     }
 
     @Override
@@ -308,9 +307,9 @@ public class ApnSettings extends PreferenceActivity implements
                     fillList();
                     getPreferenceScreen().setEnabled(true);
                     mRestoreDefaultApnMode = false;
-                    dismissDialog(DIALOG_RESTORE_DEFAULTAPN);
+                    removeDialog(DIALOG_RESTORE_DEFAULTAPN);
                     Toast.makeText(
-                        ApnSettings.this,
+                        getActivity(),
                         getResources().getString(
                                 R.string.restore_default_apn_completed),
                         Toast.LENGTH_LONG).show();
@@ -341,20 +340,14 @@ public class ApnSettings extends PreferenceActivity implements
     }
 
     @Override
-    protected Dialog onCreateDialog(int id) {
+    public Dialog onCreateDialog(int id) {
         if (id == DIALOG_RESTORE_DEFAULTAPN) {
-            ProgressDialog dialog = new ProgressDialog(this);
+            getPreferenceScreen().setEnabled(false);
+            ProgressDialog dialog = new ProgressDialog(getActivity());
             dialog.setMessage(getResources().getString(R.string.restore_default_apn));
             dialog.setCancelable(false);
             return dialog;
         }
         return null;
     }
-
-    @Override
-    protected void onPrepareDialog(int id, Dialog dialog) {
-        if (id == DIALOG_RESTORE_DEFAULTAPN) {
-            getPreferenceScreen().setEnabled(false);
-        }
-    }
 }