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      1 /*
      2  * Copyright (C) 2011 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 android.os;
     17 
     18 import java.lang.reflect.Field;
     19 
     20 /**
     21  * Class allowing access to package-protected methods/fields.
     22  */
     23 public class Looper_Accessor {
     24 
     25     public static void cleanupThread() {
     26         // clean up the looper
     27         Looper.sThreadLocal.remove();
     28         try {
     29             Field sMainLooper = Looper.class.getDeclaredField("sMainLooper");
     30             sMainLooper.setAccessible(true);
     31             sMainLooper.set(null, null);
     32         } catch (SecurityException e) {
     33             catchReflectionException();
     34         } catch (IllegalArgumentException e) {
     35             catchReflectionException();
     36         } catch (NoSuchFieldException e) {
     37             catchReflectionException();
     38         } catch (IllegalAccessException e) {
     39             catchReflectionException();
     40         }
     41 
     42     }
     43 
     44     private static void catchReflectionException() {
     45         assert(false);
     46     }
     47 }
     48