Android判断App是否位于前台

末蓝、 2023-07-11 05:54 13阅读 0赞

/** * 自动根据参数选择判断前后台的方法 * * @param context 上下文参数 * @return */
        public static boolean isForeground(Context context) { 
            boolean runningTask = getRunningTask(context, context.getPackageName());
            boolean runningAppProcesses = getRunningAppProcesses(context, context.getPackageName());
            return runningTask && runningAppProcesses;
            }
            
     /** * 方法1：通过getRunningTasks判断App是否位于前台，此方法在5.0以上失效 * * @param context 上下文参数 * @param packageName 需要检查是否位于栈顶的App的包名 * @return */
        public static boolean getRunningTask(Context context, String packageName) { 
            try{ 
                ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
                List<ActivityManager.RunningTaskInfo> runningTasks = am.getRunningTasks(1);
                if (runningTasks != null && runningTasks.size() > 0) { 
                    ComponentName cn = runningTasks.get(0).topActivity;
                    return !TextUtils.isEmpty(packageName) && packageName.equals(cn.getPackageName());
                }
            }catch (Exception e){ 
                e.printStackTrace();
            }
            return false;
        }
    
    
        /** * 方法2：通过getRunningAppProcesses的IMPORTANCE_FOREGROUND属性判断是否位于前台，当service需要常驻后台时候，此方法失效, * 在小米 Note上此方法无效，在Nexus上正常 * * @param context 上下文参数 * @param packageName 需要检查是否位于栈顶的App的包名 * @return */
        public static boolean getRunningAppProcesses(Context context, String packageName) { 
            ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
            List<ActivityManager.RunningAppProcessInfo> appProcesses = activityManager.getRunningAppProcesses();
            if (appProcesses == null) { 
                return false;
            }
            for (ActivityManager.RunningAppProcessInfo appProcess : appProcesses) { 
                if (appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND && appProcess.processName.equals(packageName)) { 
                    return true;
                }
            }
            return false;
        }
    
        /** * 判断Service是否正在运行 * * @param context 上下文 * @param serviceName Service 类全名 如MyService.class.getName() * @return true 表示正在运行，false 表示没有运行 */
        public static boolean isServiceRunning(Context context, String serviceName) { 
            ActivityManager manager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
            List<ActivityManager.RunningServiceInfo> serviceInfoList = manager.getRunningServices(30);
            if (serviceInfoList == null || serviceInfoList.size() <= 0) { 
                return false;
            }
            for (ActivityManager.RunningServiceInfo info : serviceInfoList) { 
                if (info.service.getClassName().equals(serviceName)) { 
                    return true;
                }
            }
            return false;
        }