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/*
* Copyright (C) 2013 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.example.android.contactslist.util;
import android.annotation.TargetApi;
import android.os.Build;
import android.os.StrictMode;
import com.example.android.contactslist.ui.ContactDetailActivity;
import com.example.android.contactslist.ui.ContactsListActivity;
/**
* This class contains static utility methods.
*/
public class Utils {
// Prevents instantiation.
private Utils() {}
/**
* Enables strict mode. This should only be called when debugging the application and is useful
* for finding some potential bugs or best practice violations.
*/
@TargetApi(11)
public static void enableStrictMode() {
// Strict mode is only available on gingerbread or later
if (Utils.hasGingerbread()) {
// Enable all thread strict mode policies
StrictMode.ThreadPolicy.Builder threadPolicyBuilder =
new StrictMode.ThreadPolicy.Builder()
.detectAll()
.penaltyLog();
// Enable all VM strict mode policies
StrictMode.VmPolicy.Builder vmPolicyBuilder =
new StrictMode.VmPolicy.Builder()
.detectAll()
.penaltyLog();
// Honeycomb introduced some additional strict mode features
if (Utils.hasHoneycomb()) {
// Flash screen when thread policy is violated
threadPolicyBuilder.penaltyFlashScreen();
// For each activity class, set an instance limit of 1. Any more instances and
// there could be a memory leak.
vmPolicyBuilder
.setClassInstanceLimit(ContactsListActivity.class, 1)
.setClassInstanceLimit(ContactDetailActivity.class, 1);
}
// Use builders to enable strict mode policies
StrictMode.setThreadPolicy(threadPolicyBuilder.build());
StrictMode.setVmPolicy(vmPolicyBuilder.build());
}
}
/**
* Uses static final constants to detect if the device's platform version is Gingerbread or
* later.
*/
public static boolean hasGingerbread() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.GINGERBREAD;
}
/**
* Uses static final constants to detect if the device's platform version is Honeycomb or
* later.
*/
public static boolean hasHoneycomb() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB;
}
/**
* Uses static final constants to detect if the device's platform version is Honeycomb MR1 or
* later.
*/
public static boolean hasHoneycombMR1() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB_MR1;
}
/**
* Uses static final constants to detect if the device's platform version is ICS or
* later.
*/
public static boolean hasICS() {
return Build.VERSION.SDK_INT >= Build.VERSION_CODES.ICE_CREAM_SANDWICH;
}
}
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