1 /*
2  * Copyright (C) 2014 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 
17 package com.android.inputmethod.compat;
18 
19 import android.os.Looper;
20 
21 import java.lang.reflect.Method;
22 
23 /**
24  * Helper to call Looper#quitSafely, which was introduced in API
25  * level 18 (Build.VERSION_CODES.JELLY_BEAN_MR2).
26  *
27  * In unit tests, we create lots of instances of LatinIME, which means we need to clean up
28  * some Loopers lest we leak file descriptors. In normal use on a device though, this is never
29  * necessary (although it does not hurt).
30  */
31 public final class LooperCompatUtils {
32     private static final Method METHOD_quitSafely = CompatUtils.getMethod(
33             Looper.class, "quitSafely");
34 
quitSafely(final Looper looper)35     public static void quitSafely(final Looper looper) {
36         if (null != METHOD_quitSafely) {
37             CompatUtils.invoke(looper, null /* default return value */, METHOD_quitSafely);
38         } else {
39             looper.quit();
40         }
41     }
42 }
43