java - 如何实现当网络或WiFi连接时对话框消失。反之亦然？

Question

我为我的 Android 应用构建对话框。它运行良好，但我遇到了一些与对话框相关的问题。

(1) 我想要互联网连接或 WiFi 连接时。对话框自动消失。

(2) 如果互联网连接丢失，应用程序正在运行。对话框再次自动出现。

if (!isConnected(Dashboard.this)) buildDialog(Dashboard.this).show();
        else {
            setContentView(R.layout.activity_dashboard);
        }
 public boolean isConnected(Context context) {

        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo netinfo = cm.getActiveNetworkInfo();

        if (netinfo != null && netinfo.isConnectedOrConnecting()) {
            android.net.NetworkInfo wifi = cm.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
            android.net.NetworkInfo mobile = cm.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

            if ((mobile != null && mobile.isConnectedOrConnecting()) || (wifi != null && wifi.isConnectedOrConnecting()))
                return true;
            else return false;
        } else
            return false;
    }

    public AlertDialog.Builder buildDialog(Context c) {

        AlertDialog.Builder builder = new AlertDialog.Builder(c);
        builder.setTitle("No Internet Connection");
        builder.setMessage("You need to have Mobile Data or WiFi to access this. Press OK to Exit");
        builder.setCancelable(false);

        builder.setPositiveButton("Ok", new DialogInterface.OnClickListener() {

            @Override
            public void onClick(DialogInterface dialog, int which) {

                Dashboard.super.onBackPressed();
            }
        });

        return builder;
    } 

Answer 1

在你的 alear daillog 中使用属性 builder.setCancelable(false);