Android判断当前应用程序处于前台还是后台的两种方法

1、通过RunningTaskInfo类判断（需要额外权限）：

复制代码 代码如下:

/**     *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;    }

需要在AndroidMenitfest.xml文件中添加以下权限
复制代码 代码如下:

---

2、通过RunningAppProcessInfo类判断（不需要额外权限）：

复制代码 代码如下:

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) {                          Log.i("后台", appProcess.processName);                          return true;                }else{                          Log.i("前台", appProcess.processName);                          return false;                }           }    }    return false;}

---

• 推送或者xmpp消息，需要判断前台和后台运行；根据情况启动本地推送；
• 收录到常用工具方法中；