[Step 1] Add preference activities for spell checkers

Bug: 5057977
Change-Id: I8f2f3d480325029c794c058beed2475033a617f9

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

@@ -0,0 +1,84 @@
+/*
+ * 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.settings.inputmethod;
+
+import com.android.settings.R;
+import com.android.settings.SettingsPreferenceFragment;
+
+import android.os.Bundle;
+import android.preference.Preference;
+import android.preference.PreferenceScreen;
+import android.view.textservice.SpellCheckerInfo;
+
+public class SpellCheckersSettings extends SettingsPreferenceFragment
+        implements Preference.OnPreferenceChangeListener {
+
+    private SpellCheckerInfo mCurrentSci;
+    private SpellCheckerInfo[] mEnabledScis;
+
+    @Override
+    public void onCreate(Bundle icicle) {
+        super.onCreate(icicle);
+        addPreferencesFromResource(R.xml.spellchecker_prefs);
+        updateScreen();
+    }
+
+    @Override
+    public boolean onPreferenceChange(Preference arg0, Object arg1) {
+        return false;
+    }
+
+    @Override
+    public boolean onPreferenceTreeClick(PreferenceScreen screen, Preference preference) {
+        return false;
+    }
+
+    @Override
+    public void onResume() {
+        updateScreen();
+    }
+
+    @Override
+    public void onPause() {
+        saveState();
+    }
+
+    private void saveState() {
+        SpellCheckerUtils.setCurrentSpellChecker(mCurrentSci);
+    }
+
+    private void updateScreen() {
+        getPreferenceScreen().removeAll();
+        updateEnabledSpellCheckers();
+    }
+
+    private void updateEnabledSpellCheckers() {
+        mCurrentSci = SpellCheckerUtils.getCurrentSpellChecker();
+        mEnabledScis = SpellCheckerUtils.getEnabledSpellCheckers();
+        if (mCurrentSci == null || mEnabledScis == null) {
+            return;
+        }
+        // TODO: implement here
+        for (int i = 0; i < mEnabledScis.length; ++i) {
+            final SpellCheckerInfo sci = mEnabledScis[i];
+            final PreferenceScreen scs = new PreferenceScreen(getActivity(), null);
+            scs.setTitle(sci.getId());
+            getPreferenceScreen().addPreference(scs);
+            
+        }
+    }
+}