android - 想要为Android上的错误弹出消息

Question

这是我要添加 pop 消息的方法。如果结果集包含“404”，我想显示一条消息。我不能在这里使用Toast，因为这还没有写在任何Activity Context上。

protected void onPostExecute(String result) {
    // To make a popup notification when it is a Not Found Location
    if(result.contains("404")){
        return;
    }

    super.onPostExecute(result);
    if (baseFragment != null) {
        if (isMainTask) {
            baseFragment.onTaskFinished(result);
        } else {
            baseFragment.onSubTaskFinished(result);
        }
    }
}

Answer 1

要创建任何类型的ErrorDialog/Dialog或PopupWindow，您需要 Activity Context。 PFB返回警报对话框的示例代码:

return new AlertDialog.Builder(baseFragment.getActivity().getApplicationContext())
            .setTitle("TITLE OF YOUR ALERT DIALOG")
            .setMessage(“MESSAGE YOU WANT TO SHOW”)
            .setCancelable(false)
            .setPositiveButton("BUTTON NAME",
                    new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,
                        int whichButton) {
                    removeDialog(The id of the managed dialog);


                    //TASK YOU WANT TO PERFORM
                                      finish();
                }
            })
            .setNegativeButton("BUTTON NAME",
                    new DialogInterface.OnClickListener() {
                public void onClick(DialogInterface dialog,
                        int whichButton) {
                    removeDialog(The id of the managed dialog);
                    finish();
                }
            }).create();