/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.util;
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import android.app.Activity;
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import android.content.Context;
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import android.os.Handler;
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import android.os.HandlerThread;
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import android.os.IBinder;
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import android.os.Looper;
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import android.os.Message;
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import android.os.Process;
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import android.view.inputmethod.InputMethodManager;
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/**
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* Utility class for offloading some class from UI thread
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*/
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public class UiThreadHelper {
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private static HandlerThread sHandlerThread;
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private static Handler sHandler;
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private static final int MSG_HIDE_KEYBOARD = 1;
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private static final int MSG_SET_ORIENTATION = 2;
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private static final int MSG_RUN_COMMAND = 3;
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public static Looper getBackgroundLooper() {
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if (sHandlerThread == null) {
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sHandlerThread =
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new HandlerThread("UiThreadHelper", Process.THREAD_PRIORITY_FOREGROUND);
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sHandlerThread.start();
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}
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return sHandlerThread.getLooper();
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}
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private static Handler getHandler(Context context) {
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if (sHandler == null) {
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sHandler = new Handler(getBackgroundLooper(),
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new UiCallbacks(context.getApplicationContext()));
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}
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return sHandler;
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}
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public static void hideKeyboardAsync(Context context, IBinder token) {
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Message.obtain(getHandler(context), MSG_HIDE_KEYBOARD, token).sendToTarget();
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}
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public static void setOrientationAsync(Activity activity, int orientation) {
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Message.obtain(getHandler(activity), MSG_SET_ORIENTATION, orientation, 0, activity)
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.sendToTarget();
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}
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public static void runAsyncCommand(Context context, AsyncCommand command, int arg1, int arg2) {
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Message.obtain(getHandler(context), MSG_RUN_COMMAND, arg1, arg2, command).sendToTarget();
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}
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private static class UiCallbacks implements Handler.Callback {
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private final InputMethodManager mIMM;
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UiCallbacks(Context context) {
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mIMM = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
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}
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@Override
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public boolean handleMessage(Message message) {
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switch (message.what) {
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case MSG_HIDE_KEYBOARD:
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mIMM.hideSoftInputFromWindow((IBinder) message.obj, 0);
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return true;
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case MSG_SET_ORIENTATION:
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((Activity) message.obj).setRequestedOrientation(message.arg1);
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return true;
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case MSG_RUN_COMMAND:
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((AsyncCommand) message.obj).execute(message.arg1, message.arg2);
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return true;
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}
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return false;
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}
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}
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public interface AsyncCommand {
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void execute(int arg1, int arg2);
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}
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}
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