Add new settings UI to select keyboard layout.

Bug: 6110399
Change-Id: Ib2758bdcdd6b271be402f46c56d41619dc7aecb9

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

@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2012 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 android.app.ListFragment;
+import android.app.LoaderManager.LoaderCallbacks;
+import android.content.AsyncTaskLoader;
+import android.content.Context;
+import android.content.Loader;
+import android.hardware.input.InputManager;
+import android.hardware.input.InputManager.KeyboardLayout;
+import android.os.Bundle;
+import android.util.Log;
+import android.view.View;
+import android.widget.ArrayAdapter;
+import android.widget.ListAdapter;
+import android.widget.ListView;
+
+import java.util.Collections;
+import java.util.List;
+
+public class KeyboardLayoutPicker extends ListFragment
+        implements LoaderCallbacks<List<KeyboardLayout>> {
+    private static final String TAG = "KeyboardLayoutPicker";
+
+    private String mInputDeviceDescriptor;
+
+    /**
+     * Intent extra: The input device descriptor of the keyboard whose keyboard
+     * layout is to be changed.
+     */
+    public static final String EXTRA_INPUT_DEVICE_DESCRIPTOR = "input_device_descriptor";
+
+    @Override
+    public void onActivityCreated(Bundle savedInstanceState) {
+        super.onActivityCreated(savedInstanceState);
+
+        mInputDeviceDescriptor = getActivity().getIntent().getStringExtra(
+                EXTRA_INPUT_DEVICE_DESCRIPTOR);
+        if (mInputDeviceDescriptor == null) {
+            Log.e(TAG, "Missing expected intent parameter: " + EXTRA_INPUT_DEVICE_DESCRIPTOR);
+            getActivity().finish();
+        }
+
+        setEmptyText(getActivity().getText(R.string.keyboard_layout_picker_empty_text));
+        getLoaderManager().initLoader(0, null, this);
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        getListView().requestFocus();
+    }
+
+    @Override
+    public void onListItemClick(ListView l, View v, int position, long id) {
+        if (mInputDeviceDescriptor != null) {
+            KeyboardLayout c = (KeyboardLayout)l.getItemAtPosition(position);
+            InputManager im = (InputManager)getActivity().getSystemService(Context.INPUT_SERVICE);
+            im.setInputDeviceKeyboardLayoutDescriptor(mInputDeviceDescriptor, c.getDescriptor());
+        }
+
+        getActivity().finish();
+    }
+
+    @Override
+    public Loader<List<KeyboardLayout>> onCreateLoader(int id, Bundle args) {
+        return new KeyboardLayoutLoader(getActivity());
+    }
+
+    @Override
+    public void onLoadFinished(Loader<List<KeyboardLayout>> loader,
+            List<KeyboardLayout> data) {
+        setListAdapter(new KeyboardLayoutAdapter(getActivity(), data));
+    }
+
+    @Override
+    public void onLoaderReset(Loader<List<KeyboardLayout>> loader) {
+        setListAdapter(null);
+    }
+
+    private static final class KeyboardLayoutAdapter
+            extends ArrayAdapter<KeyboardLayout> {
+        public KeyboardLayoutAdapter(Context context, List<KeyboardLayout> list) {
+            super(context, android.R.layout.simple_list_item_1, list);
+        }
+    }
+
+    private static final class KeyboardLayoutLoader
+            extends AsyncTaskLoader<List<KeyboardLayout>> {
+        public KeyboardLayoutLoader(Context context) {
+            super(context);
+        }
+
+        @Override
+        public List<KeyboardLayout> loadInBackground() {
+            InputManager im = (InputManager)getContext().getSystemService(Context.INPUT_SERVICE);
+            List<KeyboardLayout> list = im.getKeyboardLayouts();
+            Collections.sort(list);
+            return list;
+        }
+
+        @Override
+        protected void onStartLoading() {
+            super.onStartLoading();
+            forceLoad();
+        }
+
+        @Override
+        protected void onStopLoading() {
+            super.onStopLoading();
+            cancelLoad();
+        }
+    }
+}