1 /* 2 * Copyright (C) 2012 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.example.android.displayingbitmaps.util; 18 19 import android.annotation.TargetApi; 20 import android.os.Build; 21 import android.os.Build.VERSION_CODES; 22 import android.os.StrictMode; 23 24 import com.example.android.displayingbitmaps.ui.ImageDetailActivity; 25 import com.example.android.displayingbitmaps.ui.ImageGridActivity; 26 27 /** 28 * Class containing some static utility methods. 29 */ 30 public class Utils { Utils()31 private Utils() {}; 32 33 34 @TargetApi(VERSION_CODES.HONEYCOMB) enableStrictMode()35 public static void enableStrictMode() { 36 if (Utils.hasGingerbread()) { 37 StrictMode.ThreadPolicy.Builder threadPolicyBuilder = 38 new StrictMode.ThreadPolicy.Builder() 39 .detectAll() 40 .penaltyLog(); 41 StrictMode.VmPolicy.Builder vmPolicyBuilder = 42 new StrictMode.VmPolicy.Builder() 43 .detectAll() 44 .penaltyLog(); 45 46 if (Utils.hasHoneycomb()) { 47 threadPolicyBuilder.penaltyFlashScreen(); 48 vmPolicyBuilder 49 .setClassInstanceLimit(ImageGridActivity.class, 1) 50 .setClassInstanceLimit(ImageDetailActivity.class, 1); 51 } 52 StrictMode.setThreadPolicy(threadPolicyBuilder.build()); 53 StrictMode.setVmPolicy(vmPolicyBuilder.build()); 54 } 55 } 56 hasFroyo()57 public static boolean hasFroyo() { 58 // Can use static final constants like FROYO, declared in later versions 59 // of the OS since they are inlined at compile time. This is guaranteed behavior. 60 return Build.VERSION.SDK_INT >= VERSION_CODES.FROYO; 61 } 62 hasGingerbread()63 public static boolean hasGingerbread() { 64 return Build.VERSION.SDK_INT >= VERSION_CODES.GINGERBREAD; 65 } 66 hasHoneycomb()67 public static boolean hasHoneycomb() { 68 return Build.VERSION.SDK_INT >= VERSION_CODES.HONEYCOMB; 69 } 70 hasHoneycombMR1()71 public static boolean hasHoneycombMR1() { 72 return Build.VERSION.SDK_INT >= VERSION_CODES.HONEYCOMB_MR1; 73 } 74 hasJellyBean()75 public static boolean hasJellyBean() { 76 return Build.VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN; 77 } 78 hasKitKat()79 public static boolean hasKitKat() { 80 return Build.VERSION.SDK_INT >= VERSION_CODES.KITKAT; 81 } 82 } 83