| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.gallery3d.common; |
| |
| import android.os.AsyncTask; |
| import android.os.Build; |
| |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.concurrent.Executor; |
| |
| /** |
| * Helper class to execute an AsyncTask in parallel if SDK version is 11 or newer. |
| */ |
| public class AsyncTaskUtil { |
| private static Method sMethodExecuteOnExecutor; |
| private static Executor sExecutor; |
| static { |
| if (Build.VERSION.SDK_INT >= 11) { |
| try { |
| sExecutor = (Executor) AsyncTask.class.getField("THREAD_POOL_EXECUTOR") |
| .get(null); |
| sMethodExecuteOnExecutor = AsyncTask.class.getMethod( |
| "executeOnExecutor", Executor.class, Object[].class); |
| } catch (IllegalAccessException e) { |
| throw new RuntimeException(e); |
| } catch (NoSuchFieldException e) { |
| throw new RuntimeException(e); |
| } catch (NoSuchMethodException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| |
| public static <Param> void executeInParallel(AsyncTask<Param, ?, ?> task, Param... params) { |
| if (Build.VERSION.SDK_INT < 11) { |
| task.execute(params); |
| } else { |
| try { |
| sMethodExecuteOnExecutor.invoke(task, sExecutor, params); |
| } catch (IllegalAccessException e) { |
| throw new RuntimeException(e); |
| } catch (InvocationTargetException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| |
| private AsyncTaskUtil() { |
| } |
| } |
| |