Added CompatUtils for starting a language selector

Change-Id: I158414efaff43d0c6abe1f9af83ed3425992dfb9

java/src/com/android/inputmethod/compat/CompatUtils.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.inputmethod.compat;
+
+import android.content.Intent;
+import android.text.TextUtils;
+
+public class CompatUtils {
+    private static final String EXTRA_INPUT_METHOD_ID = "input_method_id";
+    // TODO: Can these be constants instead of literal String constants?
+    private static final String INPUT_METHOD_SUBTYPE_SETTINGS =
+            "android.settings.INPUT_METHOD_SUBTYPE_SETTINGS";
+    private static final String INPUT_LANGUAGE_SELECTION =
+            "com.android.inputmethod.latin.INPUT_LANGUAGE_SELECTION";
+
+    public static Intent getInputLanguageSelectionIntent(String inputMethodId,
+            int flagsForSubtypeSettings) {
+        final String action;
+        Intent intent;
+        if (android.os.Build.VERSION.SDK_INT
+                >= /* android.os.Build.VERSION_CODES.HONEYCOMB */ 11) {
+            // Refer to android.provider.Settings.ACTION_INPUT_METHOD_SUBTYPE_SETTINGS
+            action = INPUT_METHOD_SUBTYPE_SETTINGS;
+            intent = new Intent(action);
+            if (!TextUtils.isEmpty(inputMethodId)) {
+                intent.putExtra(EXTRA_INPUT_METHOD_ID, inputMethodId);
+            }
+            if (flagsForSubtypeSettings > 0) {
+                intent.setFlags(flagsForSubtypeSettings);
+            }
+        } else {
+            action = INPUT_LANGUAGE_SELECTION;
+            intent = new Intent(action);
+        }
+        return intent;
+    }
+}

java/src/com/android/inputmethod/latin/LatinIME.java

@@ -16,6 +16,7 @@
 
 package com.android.inputmethod.latin;
 
+import com.android.inputmethod.compat.CompatUtils;
 import com.android.inputmethod.deprecated.VoiceConnector;
 import com.android.inputmethod.keyboard.Keyboard;
 import com.android.inputmethod.keyboard.KeyboardActionListener;
@@ -2215,13 +2216,10 @@ public class LatinIME extends InputMethodService implements KeyboardActionListen
                 di.dismiss();
                 switch (position) {
                 case 0:
-                    Intent intent = new Intent(
+                    Intent intent = CompatUtils.getInputLanguageSelectionIntent(
-                            android.provider.Settings.ACTION_INPUT_METHOD_SUBTYPE_SETTINGS);
+                            mInputMethodId, Intent.FLAG_ACTIVITY_NEW_TASK
-                    intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
                             | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED
                             | Intent.FLAG_ACTIVITY_CLEAR_TOP);
-                    intent.putExtra(android.provider.Settings.EXTRA_INPUT_METHOD_ID,
-                            mInputMethodId);
                     startActivity(intent);
                     break;
                 case 1:

java/src/com/android/inputmethod/latin/Settings.java

@@ -16,11 +16,13 @@
 
 package com.android.inputmethod.latin;
 
+import com.android.inputmethod.compat.CompatUtils;
 import com.android.inputmethod.deprecated.VoiceConnector;
 
 import android.app.AlertDialog;
 import android.app.Dialog;
 import android.app.backup.BackupManager;
+import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
@@ -38,6 +40,7 @@ import android.text.AutoText;
 import android.text.TextUtils;
 import android.text.method.LinkMovementMethod;
 import android.util.Log;
+import android.view.inputmethod.InputMethodManager;
 import android.widget.TextView;
 
 import java.util.Locale;
@@ -221,16 +224,10 @@ public class Settings extends PreferenceActivity
     @Override
     public boolean onPreferenceClick(Preference pref) {
         if (pref == mInputLanguageSelection) {
-            final String action;
+            startActivity(CompatUtils.getInputLanguageSelectionIntent(
-            if (android.os.Build.VERSION.SDK_INT
+                    Utils.getInputMethodId(
-                    >= /* android.os.Build.VERSION_CODES.HONEYCOMB */ 11) {
+                            (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE),
-                // Refer to android.provider.Settings.ACTION_INPUT_METHOD_SUBTYPE_SETTINGS
+                            getApplicationInfo().packageName), 0));
-                // TODO: Can this be a constant instead of literal String constant?
-                action = "android.settings.INPUT_METHOD_SUBTYPE_SETTINGS";
-            } else {
-                action = "com.android.inputmethod.latin.INPUT_LANGUAGE_SELECTION";
-            }
-            startActivity(new Intent(action));
             return true;
         }
         return false;