CommonUtils.java

/**
 * Copyright (C) 2013-2014 EaseMob Technologies. All rights reserved.
 *
 * 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.kaixin.android.utils;

import java.util.List;

import android.app.ActivityManager;
import android.app.ActivityManager.RunningTaskInfo;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;

public class CommonUtils {

	/**
	 * 检测网络是否可用
	 * 
	 * @param context
	 * @return
	 */
	public static boolean isNetWorkConnected(Context context) {
		if (context != null) {
			ConnectivityManager mConnectivityManager = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
			NetworkInfo mNetworkInfo = mConnectivityManager.getActiveNetworkInfo();
			if (mNetworkInfo != null) {
				return mNetworkInfo.isAvailable();
			}
		}

		return false;
	}

	/**
	 * 检测Sdcard是否存在
	 * 
	 * @return
	 */
	public static boolean isExitsSdcard() {
		if (android.os.Environment.getExternalStorageState().equals(android.os.Environment.MEDIA_MOUNTED))
			return true;
		else
			return false;
	}

	public static String getTopActivity(Context context) {
		ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
		List<RunningTaskInfo> runningTaskInfos = manager.getRunningTasks(1);

		if (runningTaskInfos != null)
			return runningTaskInfos.get(0).topActivity.getClassName();
		else
			return "";
	}

}