Home | History | Annotate | Download | only in util 
      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 {
     27         void onImeStateChanged(boolean imeOpen);
     28     }
     29 
     30     public interface ImeStateHost {
     31         void onDisplayHeightChanged(int heightMeasureSpec);
     32         void registerImeStateObserver(ImeUtil.ImeStateObserver observer);
     33         void unregisterImeStateObserver(ImeUtil.ImeStateObserver observer);
     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).
     41     public static void clearInstance() {
     42         sInstance = null;
     43     }
     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
     56     public static void set(final ImeUtil imeUtil) {
     57         sInstance = imeUtil;
     58     }
     59 
     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 
     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 
     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