1 /* 2 * Copyright (C) 2017 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.googlecode.android_scripting; 18 19 import android.content.Context; 20 import android.os.Handler; 21 22 import com.googlecode.android_scripting.future.FutureResult; 23 24 import java.util.concurrent.Callable; 25 26 public class MainThread { 27 28 private MainThread() { 29 // Utility class. 30 } 31 32 /** 33 * Executed in the main thread, returns the result of an execution. Anything that runs here should 34 * finish quickly to avoid hanging the UI thread. 35 */ 36 public static <T> T run(Context context, final Callable<T> task) { 37 final FutureResult<T> result = new FutureResult<T>(); 38 Handler handler = new Handler(context.getMainLooper()); 39 handler.post(new Runnable() { 40 @Override 41 public void run() { 42 try { 43 result.set(task.call()); 44 } catch (Exception e) { 45 Log.e(e); 46 result.set(null); 47 } 48 } 49 }); 50 try { 51 return result.get(); 52 } catch (InterruptedException e) { 53 Log.e(e); 54 } 55 return null; 56 } 57 58 public static void run(Context context, final Runnable task) { 59 Handler handler = new Handler(context.getMainLooper()); 60 handler.post(new Runnable() { 61 @Override 62 public void run() { 63 task.run(); 64 } 65 }); 66 } 67 } 68
