Utils.java

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/*
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 * Copyright (C) 2012 The Android Open Source Project
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *      http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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package com.example.android.displayingbitmaps.util;
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import android.annotation.TargetApi;
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import android.os.Build;
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import android.os.Build.VERSION_CODES;
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import android.os.StrictMode;
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import com.example.android.displayingbitmaps.ui.ImageDetailActivity;
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import com.example.android.displayingbitmaps.ui.ImageGridActivity;
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/**
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 * Class containing some static utility methods.
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 */
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public class Utils {
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    private Utils() {};
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    @TargetApi(VERSION_CODES.HONEYCOMB)
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    public static void enableStrictMode() {
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        if (Utils.hasGingerbread()) {
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            StrictMode.ThreadPolicy.Builder threadPolicyBuilder =
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                    new StrictMode.ThreadPolicy.Builder()
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                            .detectAll()
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                            .penaltyLog();
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            StrictMode.VmPolicy.Builder vmPolicyBuilder =
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                    new StrictMode.VmPolicy.Builder()
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                            .detectAll()
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                            .penaltyLog();
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            if (Utils.hasHoneycomb()) {
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                threadPolicyBuilder.penaltyFlashScreen();
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                vmPolicyBuilder
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                        .setClassInstanceLimit(ImageGridActivity.class, 1)
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                        .setClassInstanceLimit(ImageDetailActivity.class, 1);
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            }
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            StrictMode.setThreadPolicy(threadPolicyBuilder.build());
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            StrictMode.setVmPolicy(vmPolicyBuilder.build());
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        }
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    }
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    public static boolean hasFroyo() {
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        // Can use static final constants like FROYO, declared in later versions
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        // of the OS since they are inlined at compile time. This is guaranteed behavior.
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        return Build.VERSION.SDK_INT >= VERSION_CODES.FROYO;
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    }
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    public static boolean hasGingerbread() {
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        return Build.VERSION.SDK_INT >= VERSION_CODES.GINGERBREAD;
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    }
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    public static boolean hasHoneycomb() {
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        return Build.VERSION.SDK_INT >= VERSION_CODES.HONEYCOMB;
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    }
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    public static boolean hasHoneycombMR1() {
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        return Build.VERSION.SDK_INT >= VERSION_CODES.HONEYCOMB_MR1;
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    }
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    public static boolean hasJellyBean() {
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        return Build.VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN;
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    }
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    public static boolean hasKitKat() {
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        return Build.VERSION.SDK_INT >= VERSION_CODES.KITKAT;
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    }
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}