实现自定义AlertDialog内微调 [英] Implementing a Spinner inside a Custom AlertDialog

问题描述

我想实现一个自定义alertdialog箱内部的微调，但我不断收到一个空指针异常...任何想法？

注：空指针异常发生在行：spinner.setAdapter（适配器）;
其中，微调为null。

  LayoutInflater吹气= getLayoutInflater（）;
        查看dialoglayout = inflater.inflate（R.layout.custom_dialog，（ViewGroup中）findViewById（R.id.layout_root））;
        AlertDialog.Builder建设者=新AlertDialog.Builder（本）;
        builder.setView（dialoglayout）;        微调微调=（微调）findViewById（R.id.spinner）;
        ArrayAdapter＆LT;＆CharSequence的GT;适配器= ArrayAdapter.createFromResource（
                对此，R.array.priority_array，android.R.layout.simple_spinner_item）;
        adapter.setDropDownViewResource（android.R.layout.simple_spinner_dropdown_item）;
        spinner.setAdapter（适配器）;        builder.show（）;
 

解决方案

在dialoglayout搜索微调

微调微调=（微调）dialoglayout.findViewById（R.id.spinner）;

对不起，死灵。没有留意日期...

I am trying to implement a spinner inside of a custom alertdialog box, but I keep getting a NullPointer Exception... any ideas?

Note: The NullPointer Exception occurs at the line: spinner.setAdapter(adapter); where spinner is null.

LayoutInflater inflater = getLayoutInflater();
        View dialoglayout = inflater.inflate(R.layout.custom_dialog, (ViewGroup) findViewById(R.id.layout_root));
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setView(dialoglayout);

        Spinner spinner = (Spinner) findViewById(R.id.spinner);
        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(
                this, R.array.priority_array, android.R.layout.simple_spinner_item);
        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        spinner.setAdapter(adapter);

        builder.show();

解决方案

Search for Spinner in dialoglayout

Spinner spinner = (Spinner) dialoglayout.findViewById(R.id.spinner);

Sorry for necro. Not paid attention to the date...

这篇关于实现自定义AlertDialog内微调的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！