Added utility method to check for classes at runtime (973c0e1a) · Commits · e / os / android_packages_apps_Contacts

src/com/android/contacts/common/compat/CompatUtils.java

+28 −0

Original line number	Diff line number	Diff line
		@@ -16,11 +16,16 @@
		package com.android.contacts.common.compat;

		import android.os.Build;
		import android.support.annotation.Nullable;
		import android.util.Log;

		import com.android.contacts.common.compat.SdkVersionOverride;
		import com.android.contacts.common.model.CPOWrapper;

		public final class CompatUtils {

		private static final String TAG = CompatUtils.class.getSimpleName();

		/**
		* These 4 variables are copied from ContentProviderOperation for compatibility.
		*/
		@@ -94,4 +99,27 @@ public final class CompatUtils {
		return SdkVersionOverride.getSdkVersion(Build.VERSION_CODES.LOLLIPOP)
		>= Build.VERSION_CODES.M;
		}

		/**
		* Determines if the given class is available. Can be used to check if system apis exist at
		* runtime.
		*
		* @param className the name of the class to look for.
		* @return {@code true} if the given class is available, {@code false} otherwise or if className
		* is null.
		*/
		public static boolean isClassAvailable(@Nullable String className) {
		if (className == null) {
		return false;
		}
		try {
		Class.forName(className);
		return true;
		} catch (ClassNotFoundException e) {
		return false;
		} catch (Throwable t) {
		Log.e(TAG, "Unexpected exception when checking if class exists at runtime", t);
		return false;
		}
		}
		}

0 → 100644

+30 −0

Original line number	Diff line number	Diff line
		/*
		* Copyright (C) 2015 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.contacts.common.compat;

		import android.test.AndroidTestCase;

		public class CompatUtilsTest extends AndroidTestCase {

		public void testClassAvailable() {
		assertTrue(CompatUtils.isClassAvailable(CompatUtils.class.getName()));
		}

		public void testClassNotAvailable() {
		assertFalse(CompatUtils.isClassAvailable("com.android.contacts.common.NonexistantClass"));
		}
		}