Android - 獲取版本號、判斷當前是否爲debug模式，判斷當前應用是否在前臺/後臺運行

轉載請註明出處：https://blog.csdn.net/mythmayor/article/details/101023434

一、獲取版本號

/**
 * 獲取版本號
 *
 * @param context 上下文
 * @return 當前應用的版本號，獲取失敗返回空串
 */
 public static String getVersion(Context context) {
    try {
        PackageManager manager = context.getPackageManager();
        PackageInfo info = manager.getPackageInfo(context.getPackageName(), 0);
        return info.versionName;
    } catch (Exception e) {
        e.printStackTrace();
        return "";
    }
 }

二、判斷當前是否是debug模式

/**
 * 判斷當前是否是debug模式
 *
 * @param context 上下文
 * @return true或false
 */
public static boolean isApkInDebug(Context context) {
    try {
        ApplicationInfo info = context.getApplicationInfo();
        return (info.flags & ApplicationInfo.FLAG_DEBUGGABLE) != 0;
    } catch (Exception e) {
        return false;
    }
}

三、判斷程序是否在後臺運行

/**
 * 判斷程序是否在後臺運行
 */
public static boolean isRunBackground(Context context) {
    ActivityManager activityManager = (ActivityManager) context
            .getSystemService(Context.ACTIVITY_SERVICE);
    List<ActivityManager.RunningAppProcessInfo> appProcesses = activityManager
            .getRunningAppProcesses();
    for (ActivityManager.RunningAppProcessInfo appProcess : appProcesses) {
        if (appProcess.processName.equals(context.getPackageName())) {
            if (appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_BACKGROUND) {
                // 表明程序在後臺運行
                return true;
            } else {
                return false;
            }
        }
    }
    return false;
}

四、判斷程序是否在前臺運行

/**
  * 判斷程序是否在前臺運行（當前運行的程序）
  */
 public static boolean isRunForeground(Context context) {
     ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
     String packageName = context.getPackageName();
     List<ActivityManager.RunningAppProcessInfo> appProcesses = activityManager
             .getRunningAppProcesses();
     if (appProcesses == null)
         return false;
     for (ActivityManager.RunningAppProcessInfo appProcess : appProcesses) {
         if (appProcess.processName.equals(packageName)
                 && appProcess.importance == ActivityManager.RunningAppProcessInfo.IMPORTANCE_FOREGROUND) {
             return true;// 程序運行在前臺
         }
     }
     return false;
 }