1 /* 2 * Copyright (C) 2015 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.messaging.util; 17 18 import android.content.Context; 19 import android.support.annotation.NonNull; 20 import android.view.View; 21 import android.view.inputmethod.InputMethodManager; 22 23 import com.google.common.annotations.VisibleForTesting; 24 25 public class ImeUtil { 26 public interface ImeStateObserver { onImeStateChanged(boolean imeOpen)27 void onImeStateChanged(boolean imeOpen); 28 } 29 30 public interface ImeStateHost { onDisplayHeightChanged(int heightMeasureSpec)31 void onDisplayHeightChanged(int heightMeasureSpec); registerImeStateObserver(ImeUtil.ImeStateObserver observer)32 void registerImeStateObserver(ImeUtil.ImeStateObserver observer); unregisterImeStateObserver(ImeUtil.ImeStateObserver observer)33 void unregisterImeStateObserver(ImeUtil.ImeStateObserver observer); isImeOpen()34 boolean isImeOpen(); 35 } 36 37 private static volatile ImeUtil sInstance; 38 39 // Used to clear the static cached instance of ImeUtil during testing. This is necessary 40 // because a previous test may have installed a mocked instance (or vice versa). clearInstance()41 public static void clearInstance() { 42 sInstance = null; 43 } get()44 public static ImeUtil get() { 45 if (sInstance == null) { 46 synchronized (ImeUtil.class) { 47 if (sInstance == null) { 48 sInstance = new ImeUtil(); 49 } 50 } 51 } 52 return sInstance; 53 } 54 55 @VisibleForTesting set(final ImeUtil imeUtil)56 public static void set(final ImeUtil imeUtil) { 57 sInstance = imeUtil; 58 } 59 hideImeKeyboard(@onNull final Context context, @NonNull final View v)60 public void hideImeKeyboard(@NonNull final Context context, @NonNull final View v) { 61 Assert.notNull(context); 62 Assert.notNull(v); 63 64 final InputMethodManager inputMethodManager = 65 (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE); 66 if (inputMethodManager != null) { 67 inputMethodManager.hideSoftInputFromWindow(v.getWindowToken(), 0 /* flags */); 68 } 69 } 70 showImeKeyboard(@onNull final Context context, @NonNull final View v)71 public void showImeKeyboard(@NonNull final Context context, @NonNull final View v) { 72 Assert.notNull(context); 73 Assert.notNull(v); 74 75 final InputMethodManager inputMethodManager = 76 (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE); 77 if (inputMethodManager != null) { 78 v.requestFocus(); 79 inputMethodManager.showSoftInput(v, 0 /* flags */); 80 } 81 } 82 hideSoftInput(@onNull final Context context, @NonNull final View v)83 public static void hideSoftInput(@NonNull final Context context, @NonNull final View v) { 84 final InputMethodManager inputMethodManager = 85 (InputMethodManager) context.getSystemService(Context.INPUT_METHOD_SERVICE); 86 inputMethodManager.hideSoftInputFromWindow(v.getWindowToken(), 0); 87 } 88 } 89