Question

我在 MainClass 中有两个看起来像这样的方法......

public boolean isNetworkAvailable() {
    ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

    NetworkInfo activeNetworkInfo = connectivityManager.getActiveNetworkInfo();
    return activeNetworkInfo != null && activeNetworkInfo.isConnected();
}


public void setUI() {

    final AlertDialog.Builder builder;
    builder = new AlertDialog.Builder(MainActivity.this);
    builder.setCancelable(false);
    builder.setTitle("No internet connection");
    builder.setMessage("message ")
            .setPositiveButton("Retry", new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog, int id) {

                    // if connection is back, dialod dissapears, else pops out again
                    if (!isNetworkAvailable()) {
                        builder.show();
                    } else {
                    }
                }
            });
    //  .setNegativeButton("Close", new DialogInterface.OnClickListener() {
    // public void onClick(DialogInterface dialog, int id) {
    //  User cancelled the dialog --> soft-close the app?
    //   finish();

    //} });
    if (!isNetworkAvailable()) {
        builder.show();
    }     is this possible to call this 2 methods in a fragment?Thank you in advance.

Answer 1

我猜你的mainClass扩展了FragmentActiviy，你有这两种方法在片段中创建MainClass实例，如

mainclass=(MainClass)getActivity();

并调用类似

的方法

mainclass.isNetworkAvailable();
mainclss.setUI();

如何从MainClass调用方法到片段？

1 个答案: