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app/src/main/java/com/gh/common/util/RunningUtils.java

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+package com.gh.common.util;
+
+import java.util.List;
+
+import android.app.ActivityManager;
+import android.app.ActivityManager.RunningAppProcessInfo;
+import android.app.ActivityManager.RunningTaskInfo;
+import android.content.ComponentName;
+import android.content.Context;
+
+public class RunningUtils {
+
+	/**
+	 * 判断当前应用程序处于前台还是后台
+	 */
+	public static boolean isApplicationBroughtToBackground(final Context context) {
+		ActivityManager am = (ActivityManager) context
+				.getSystemService(Context.ACTIVITY_SERVICE);
+		List<RunningTaskInfo> tasks = am.getRunningTasks(1);
+		if (!tasks.isEmpty()) {
+			ComponentName topActivity = tasks.get(0).topActivity;
+			if (!topActivity.getPackageName().equals(context.getPackageName())) {
+				return true;
+			}
+		}
+		return false;
+
+	}
+
+	/**
+	 * 判断当前应用程序处于前台还是后台
+	 */
+	public static boolean isBackground(Context context) {
+		ActivityManager activityManager = (ActivityManager) context
+				.getSystemService(Context.ACTIVITY_SERVICE);
+		List<RunningAppProcessInfo> appProcesses = activityManager
+				.getRunningAppProcesses();
+		for (RunningAppProcessInfo appProcess : appProcesses) {
+			if (appProcess.processName.equals(context.getPackageName())) {
+				if (appProcess.importance == RunningAppProcessInfo.IMPORTANCE_BACKGROUND) {
+					return true;
+				} else {
+					return false;
+				}
+			}
+		}
+		return false;
+	}
+
+	/**
+	 * 判断当前topactivity是否与传入的相同
+	 */
+	public static boolean isEqualsTop(Context context, String activityName) {
+		ActivityManager activityManager = (ActivityManager) context
+				.getSystemService(Context.ACTIVITY_SERVICE);
+		List<RunningTaskInfo> infos = activityManager.getRunningTasks(100);
+		for (RunningTaskInfo info : infos) {
+			if (info.topActivity.getClassName().equals(activityName)) {
+				return true;
+			}
+		}
+		return false;
+	}
+	
+	/**
+	 * 判断当前baseActivity是否与传入的相同
+	 */
+	public static boolean isEqualsBase(Context context, String activityName) {
+		ActivityManager activityManager = (ActivityManager) context
+				.getSystemService(Context.ACTIVITY_SERVICE);
+		List<RunningTaskInfo> infos = activityManager.getRunningTasks(100);
+		for (RunningTaskInfo info : infos) {
+			if (info.baseActivity.getClassName().equals(activityName)) {
+				return true;
+			}
+		}
+		return false;
+	}
+	
+	/**
+	 * 判断应用是否正在运行
+	 */
+	public static boolean isRunning(Context context) {
+		ActivityManager activityManager = (ActivityManager) context
+				.getSystemService(Context.ACTIVITY_SERVICE);
+		List<RunningTaskInfo> infos = activityManager.getRunningTasks(100);
+		for (RunningTaskInfo info : infos) {
+			if (info.topActivity.getPackageName().equals(
+					context.getPackageName())) {
+				return true;
+			}
+		}
+		return false;
+	}
+	
+	/**
+	 * 获取当前topactivity
+	 */
+	public static String getTopActivity(Context context) {
+		ActivityManager activityManager = (ActivityManager) context
+				.getSystemService(Context.ACTIVITY_SERVICE);
+		List<RunningTaskInfo> infos = activityManager.getRunningTasks(100);
+		for (RunningTaskInfo info : infos) {
+			if (info.topActivity.getPackageName().equals(
+					context.getPackageName())) {
+				return info.topActivity.getClassName();
+			}
+		}
+		return null;
+	}
+
+}