Fix a bug which can't enable mutiple non-preinstalled IMEs at a time

Bug: 3459430
Change-Id: Ieee340a92862047135a03c131517b927e1ed2f5e

src/com/android/settings/inputmethod/InputMethodConfig.java

@@ -104,7 +104,9 @@ public class InputMethodConfig extends SettingsPreferenceFragment {
 
     private void showSecurityWarnDialog(InputMethodInfo imi, final CheckBoxPreference chkPref,
             final String imiId) {
-        if (mDialog == null) {
+        if (mDialog != null && mDialog.isShowing()) {
+            mDialog.dismiss();
+        }
         mDialog = (new AlertDialog.Builder(getActivity()))
                 .setTitle(android.R.string.dialog_alert_title)
                 .setIcon(android.R.drawable.ic_dialog_alert)
@@ -124,11 +126,6 @@ public class InputMethodConfig extends SettingsPreferenceFragment {
                     }
                 })
                 .create();
-        } else {
-            if (mDialog.isShowing()) {
-                mDialog.dismiss();
-            }
-        }
         mDialog.setMessage(getResources().getString(R.string.ime_security_warning,
                 imi.getServiceInfo().applicationInfo.loadLabel(getPackageManager())));
         mDialog.show();