Save/Restore activity state

This assures that changes made to the port setting and to the chosen
client certificate are saved and restored.

res/layout/client_certificate_spinner.xml

@@ -2,12 +2,16 @@
 <merge xmlns:android="http://schemas.android.com/apk/res/android" >
 
     <Button
+        android:id="@+id/client_certificate_spinner_button"
         style="?android:attr/spinnerStyle"
         android:layout_width="0dip"
         android:layout_height="wrap_content"
-        android:layout_weight="1" />
+        android:layout_weight="1"
+        android:text="@string/client_certificate_spinner_empty"
+        android:freezesText="true" />
 
     <ImageButton
+        android:id="@+id/client_certificate_spinner_delete"
         android:layout_width="wrap_content"
         android:layout_height="match_parent"
         android:background="?android:attr/selectableItemBackground"

src/com/fsck/k9/activity/setup/AccountSetupIncoming.java

@@ -278,19 +278,21 @@ public class AccountSetupIncoming extends K9Activity implements OnClickListener
 
             mSubscribedFoldersOnly.setChecked(mAccount.subscribedFoldersOnly());
 
+            if (savedInstanceState == null) {
                 initializeViewListeners();
-
                 validateFields();
+            }
         } catch (Exception e) {
             failure(e);
         }
     }
 
     /**
-     * Called at the end of {@code onCreate()}, after the views have been
+     * Called at the end of either {@code onCreate()} or
-     * initialized, so that the listeners are not triggered during the view
+     * {@code onRestoreInstanceState()}, after the views have been initialized,
-     * initialization. This avoids needless calls to {@code validateFields()}
+     * so that the listeners are not triggered during the view initialization.
-     * which is called at the end of {@code onCreate()}.
+     * This avoids needless calls to {@code validateFields()} which is called
+     * immediately after this is called.
      */
     private void initializeViewListeners() {
 
@@ -341,6 +343,19 @@ public class AccountSetupIncoming extends K9Activity implements OnClickListener
         outState.putString(EXTRA_ACCOUNT, mAccount.getUuid());
     }
 
+    @Override
+    protected void onRestoreInstanceState(Bundle savedInstanceState) {
+        super.onRestoreInstanceState(savedInstanceState);
+
+        /*
+         * We didn't want the listeners active while the state was being restored
+         * because they could overwrite the restored port with a default port when
+         * the security type was restored.
+         */
+        initializeViewListeners();
+        validateFields();
+    }
+
     /**
      * Shows/hides password field and client certificate spinner
      */

src/com/fsck/k9/activity/setup/AccountSetupOutgoing.java

@@ -174,9 +174,10 @@ public class AccountSetupOutgoing extends K9Activity implements OnClickListener,
             }
             mCurrentPortViewSetting = mPortView.getText().toString();
 
+            if (savedInstanceState == null) {
                 initializeViewListeners();
-
                 validateFields();
+            }
         } catch (Exception e) {
             /*
              * We should always be able to parse our own settings.
@@ -187,10 +188,11 @@ public class AccountSetupOutgoing extends K9Activity implements OnClickListener,
     }
 
     /**
-     * Called at the end of {@code onCreate()}, after the views have been
+     * Called at the end of either {@code onCreate()} or
-     * initialized, so that the listeners are not triggered during the view
+     * {@code onRestoreInstanceState()}, after the views have been initialized,
-     * initialization. This avoids needless calls to {@code validateFields()}
+     * so that the listeners are not triggered during the view initialization.
-     * which is called at the end of {@code onCreate()}.
+     * This avoids needless calls to {@code validateFields()} which is called
+     * immediately after this is called.
      */
     private void initializeViewListeners() {
 
@@ -242,6 +244,19 @@ public class AccountSetupOutgoing extends K9Activity implements OnClickListener,
         outState.putString(EXTRA_ACCOUNT, mAccount.getUuid());
     }
 
+    @Override
+    protected void onRestoreInstanceState(Bundle savedInstanceState) {
+        super.onRestoreInstanceState(savedInstanceState);
+
+        /*
+         * We didn't want the listeners active while the state was being restored
+         * because they could overwrite the restored port with a default port when
+         * the security type was restored.
+         */
+        initializeViewListeners();
+        validateFields();
+    }
+
     /**
      * Shows/hides password field and client certificate spinner
      */

src/com/fsck/k9/view/ClientCertificateSpinner.java

@@ -47,8 +47,7 @@ public class ClientCertificateSpinner extends LinearLayout {
                 .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
         inflater.inflate(R.layout.client_certificate_spinner, this, true);
 
-        mSelection = (Button) getChildAt(0);
+        mSelection = (Button) findViewById(R.id.client_certificate_spinner_button);
-        updateView();
         mSelection.setOnClickListener(new OnClickListener() {
             @Override
             public void onClick(View v) {
@@ -56,7 +55,7 @@ public class ClientCertificateSpinner extends LinearLayout {
             }
         });
 
-        mDeleteButton = (ImageButton) getChildAt(1);
+        mDeleteButton = (ImageButton) findViewById(R.id.client_certificate_spinner_delete);
         mDeleteButton.setOnClickListener(new OnClickListener() {
             @Override
             public void onClick(View v) {
@@ -65,10 +64,6 @@ public class ClientCertificateSpinner extends LinearLayout {
         });
     }
 
-    public ClientCertificateSpinner(Context context) {
-        this(context, null);
-    }
-
     public void setAlias(String alias) {
         // Note: KeyChainAliasCallback gives back "" on cancel
         if (alias != null && alias.equals("")) {
@@ -80,16 +75,21 @@ public class ClientCertificateSpinner extends LinearLayout {
         mActivity.runOnUiThread(new Runnable() {
             @Override
             public void run() {
+                updateView();
                 if (mListener != null) {
                     mListener.onClientCertificateChanged(mAlias);
                 }
-                updateView();
             }
         });
     }
 
     public String getAlias() {
-        return mAlias;
+        String alias = mSelection.getText().toString();
+        if (alias.equals(mActivity.getString(R.string.client_certificate_spinner_empty))) {
+            return null;
+        } else {
+            return alias;
+        }
     }
 
     private void onDelete() {