1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.launcher3.util; 17 18 import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_ALLAPPS_KEYBOARD_CLOSED; 19 import static com.android.launcher3.util.Executors.UI_HELPER_EXECUTOR; 20 21 import android.annotation.SuppressLint; 22 import android.app.Activity; 23 import android.content.Context; 24 import android.os.Bundle; 25 import android.os.Handler; 26 import android.os.IBinder; 27 import android.os.Message; 28 import android.view.View; 29 import android.view.inputmethod.InputMethodManager; 30 31 import com.android.launcher3.Launcher; 32 import com.android.launcher3.views.ActivityContext; 33 34 /** 35 * Utility class for offloading some class from UI thread 36 */ 37 public class UiThreadHelper { 38 39 private static final MainThreadInitializedObject<Handler> HANDLER = 40 new MainThreadInitializedObject<>( 41 c -> new Handler(UI_HELPER_EXECUTOR.getLooper(), new UiCallbacks(c))); 42 43 private static final int MSG_HIDE_KEYBOARD = 1; 44 private static final int MSG_SET_ORIENTATION = 2; 45 private static final int MSG_RUN_COMMAND = 3; 46 private static final String STATS_LOGGER_KEY = "STATS_LOGGER_KEY"; 47 48 @SuppressLint("NewApi") hideKeyboardAsync(ActivityContext activityContext, IBinder token)49 public static void hideKeyboardAsync(ActivityContext activityContext, IBinder token) { 50 View root = activityContext.getDragLayer(); 51 52 // Since the launcher context cannot be accessed directly from callback, adding secondary 53 // message to log keyboard close event asynchronously. 54 Bundle mHideKeyboardLoggerMsg = new Bundle(); 55 mHideKeyboardLoggerMsg.putParcelable( 56 STATS_LOGGER_KEY, 57 Message.obtain( 58 HANDLER.get(root.getContext()), 59 () -> Launcher.cast(activityContext) 60 .getStatsLogManager() 61 .logger() 62 .log(LAUNCHER_ALLAPPS_KEYBOARD_CLOSED) 63 ) 64 ); 65 66 Message mHideKeyboardMsg = Message.obtain(HANDLER.get(root.getContext()), MSG_HIDE_KEYBOARD, 67 token); 68 mHideKeyboardMsg.setData(mHideKeyboardLoggerMsg); 69 mHideKeyboardMsg.sendToTarget(); 70 } 71 setOrientationAsync(Activity activity, int orientation)72 public static void setOrientationAsync(Activity activity, int orientation) { 73 Message.obtain(HANDLER.get(activity), MSG_SET_ORIENTATION, orientation, 0, activity) 74 .sendToTarget(); 75 } 76 setBackButtonAlphaAsync(Context context, AsyncCommand command, float alpha, boolean animate)77 public static void setBackButtonAlphaAsync(Context context, AsyncCommand command, float alpha, 78 boolean animate) { 79 runAsyncCommand(context, command, Float.floatToIntBits(alpha), animate ? 1 : 0); 80 } 81 runAsyncCommand(Context context, AsyncCommand command, int arg1, int arg2)82 public static void runAsyncCommand(Context context, AsyncCommand command, int arg1, int arg2) { 83 Message.obtain(HANDLER.get(context), MSG_RUN_COMMAND, arg1, arg2, command).sendToTarget(); 84 } 85 86 private static class UiCallbacks implements Handler.Callback { 87 88 private final Context mContext; 89 private final InputMethodManager mIMM; 90 UiCallbacks(Context context)91 UiCallbacks(Context context) { 92 mContext = context; 93 mIMM = (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE); 94 } 95 96 @Override handleMessage(Message message)97 public boolean handleMessage(Message message) { 98 switch (message.what) { 99 case MSG_HIDE_KEYBOARD: 100 if (mIMM.hideSoftInputFromWindow((IBinder) message.obj, 0)) { 101 // log keyboard close event only when keyboard is actually closed 102 ((Message) message.getData().getParcelable(STATS_LOGGER_KEY)) 103 .sendToTarget(); 104 } 105 return true; 106 case MSG_SET_ORIENTATION: 107 ((Activity) message.obj).setRequestedOrientation(message.arg1); 108 return true; 109 case MSG_RUN_COMMAND: 110 ((AsyncCommand) message.obj).execute(mContext, message.arg1, message.arg2); 111 return true; 112 } 113 return false; 114 } 115 } 116 117 public interface AsyncCommand { execute(Context proxy, int arg1, int arg2)118 void execute(Context proxy, int arg1, int arg2); 119 } 120 } 121