Fix window leak on orientation change

Use Activity managed dialogs

Bug: 2571764
Bug: 2571820
Change-Id: Id506988abd4200155774e92b31dd132519e29172

src/com/android/settings/wifi/WifiApSettings.java

@@ -17,6 +17,7 @@
 package com.android.settings.wifi;
 
 import com.android.settings.R;
+import android.app.Dialog;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.DialogInterface;
@@ -48,6 +49,8 @@ public class WifiApSettings extends PreferenceActivity
     private static final int OPEN_INDEX = 0;
     private static final int WPA_INDEX = 1;
 
+    private static final int DIALOG_AP_SETTINGS = 1;
+
     private String[] mSecurityType;
     private Preference mCreateNetwork;
     private CheckBoxPreference mEnableWifiAp;
@@ -84,6 +87,15 @@ public class WifiApSettings extends PreferenceActivity
         }
     }
 
+    @Override
+    protected Dialog onCreateDialog(int id) {
+        if (id == DIALOG_AP_SETTINGS) {
+            mDialog = new WifiApDialog(this, this, mWifiConfig);
+            return mDialog;
+        }
+        return null;
+    }
+
     @Override
     protected void onResume() {
         super.onResume();
@@ -99,19 +111,11 @@ public class WifiApSettings extends PreferenceActivity
     @Override
     public boolean onPreferenceTreeClick(PreferenceScreen screen, Preference preference) {
         if (preference == mCreateNetwork) {
-            showDialog();
+            showDialog(DIALOG_AP_SETTINGS);
         }
         return true;
     }
 
-    private void showDialog() {
-        if (mDialog != null) {
-            mDialog.dismiss();
-        }
-        mDialog = new WifiApDialog(this, this, mWifiConfig);
-        mDialog.show();
-    }
-
     public void onClick(DialogInterface dialogInterface, int button) {
 
         if (button == DialogInterface.BUTTON_POSITIVE) {