Android detects wifi connection, notification box delay disappears

Android detection system WiFi is connected? If there is no connection, display the prompt box, prompt to set, when the click Set to enter the system WiFi interface 1 seconds, the prompt box disappears automatically.

Code:

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public boolean isWifiConnected(Context context) {        ConnectivityManager connectivityManager = (ConnectivityManager) context                .getSystemService(Context.CONNECTIVITY_SERVICE);        NetworkInfo wifiNetworkInfo = connectivityManager                .getNetworkInfo(ConnectivityManager.TYPE_WIFI);        if (wifiNetworkInfo.isConnected()) {            return true;        } else {            builder.setMessage("请检查WIFI是否连接成功！");            builder.setTitle("提示信息");            builder.setPositiveButton("设置",                    new DialogInterface.OnClickListener() {                        public void onClick(final DialogInterface dialog,                                int which) {                            Intent intent = new Intent(                                    Settings.ACTION_WIFI_SETTINGS);                            startActivity(intent);                            //点击设置1秒后消失                            new Handler().postDelayed(new Runnable() {                                @Override                                public void run() {                                    dialog.dismiss();                                }                            }, 1000);                        }                    });            builder.setNegativeButton("取消",                    new android.content.DialogInterface.OnClickListener() {                        public void onClick(DialogInterface dialog, int which) {                            dialog.dismiss();                        }                    });            dialog = builder.create();            dialog.show();            return false;        }    }

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Android detects wifi connection, notification box delay disappears