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/*
* Copyright (C) 2017 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.launcher3.util;
import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR;
import android.app.Activity;
import android.content.Context;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.view.inputmethod.InputMethodManager;
/**
* Utility class for offloading some class from UI thread
*/
public class UiThreadHelper {
private static Handler sHandler;
private static final int MSG_HIDE_KEYBOARD = 1;
private static final int MSG_SET_ORIENTATION = 2;
private static final int MSG_RUN_COMMAND = 3;
private static Handler getHandler(Context context) {
if (sHandler == null) {
sHandler = new Handler(UI_HELPER_EXECUTOR.getLooper(),
new UiCallbacks(context.getApplicationContext()));
}
return sHandler;
}
public static void hideKeyboardAsync(Context context, IBinder token) {
Message.obtain(getHandler(context), MSG_HIDE_KEYBOARD, token).sendToTarget();
}
public static void setOrientationAsync(Activity activity, int orientation) {
Message.obtain(getHandler(activity), MSG_SET_ORIENTATION, orientation, 0, activity)
.sendToTarget();
}
public static void runAsyncCommand(Context context, AsyncCommand command, int arg1, int arg2) {
Message.obtain(getHandler(context), MSG_RUN_COMMAND, arg1, arg2, command).sendToTarget();
}
private static class UiCallbacks implements Handler.Callback {
private final InputMethodManager mIMM;
UiCallbacks(Context context) {
mIMM = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE);
}
@Override
public boolean handleMessage(Message message) {
switch (message.what) {
case MSG_HIDE_KEYBOARD:
mIMM.hideSoftInputFromWindow((IBinder) message.obj, 0);
return true;
case MSG_SET_ORIENTATION:
((Activity) message.obj).setRequestedOrientation(message.arg1);
return true;
case MSG_RUN_COMMAND:
((AsyncCommand) message.obj).execute(message.arg1, message.arg2);
return true;
}
return false;
}
}
public interface AsyncCommand {
void execute(int arg1, int arg2);
}
}
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