自定义AlertDialog不显示 [英] Custom AlertDialog not showing

问题描述

我有一个TextViewer活动，即有​​一个按钮，当我点击它，我想和列表弹出一个AlertDialog。我跟着这个链接，但它不工作（不弹出）。我相信情况下是错误的。
我用下面的code：

 保护无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.resources）;
    的ImageButton btnlist =（的ImageButton）findViewById（R.id.list）;
    btnlist.setOnClickListener（新View.OnClickListener（）{
             公共无效的onClick（视图v）{              如果（Vars.bookchapter→1）{
               最终的CharSequence [] =项目{红，绿，蓝};
               上下文mContext = getBaseContext（）;
               AlertDialog.Builder建设者=新AlertDialog.Builder（mContext）;
               builder.setTitle（选择颜色）;
               builder.setItems（项目，新DialogInterface.OnClickListener（）{
                   公共无效的onClick（DialogInterface对话，诠释项）{
                       Toast.makeText（getApplicationContext（），项目[项目]，Toast.LENGTH_SHORT）.show（）;
                   }
               }）;
               AlertDialog警报= builder.create（）;
              }其他{
               //没有
              }
             }}）;
     }
        }
 

解决方案

您已经不叫<一个href=\"http://developer.android.com/reference/android/app/Dialog.html#show%28%29\"><$c$c>show()方法。做到这一点：

  AlertDialog警报= builder.create（）;
alert.show（）;
 

I have a TextViewer Activity , that has a button, and when I click on it I want to popup an AlertDialog with list. I followed this link but it does not work (no popup). I believe the context is wrong. I used the following code:

    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.resources);
    ImageButton btnlist = (ImageButton)findViewById(R.id.list);
    btnlist.setOnClickListener(new View.OnClickListener() {
             public void onClick (View v){                  

              if (Vars.bookchapter>1){
               final CharSequence[] items = {"Red", "Green", "Blue"};
               Context mContext = getBaseContext();
               AlertDialog.Builder builder = new AlertDialog.Builder(mContext);
               builder.setTitle("Pick a color");
               builder.setItems(items, new DialogInterface.OnClickListener() {
                   public void onClick(DialogInterface dialog, int item) {
                       Toast.makeText(getApplicationContext(), items[item], Toast.LENGTH_SHORT).show();
                   }
               });
               AlertDialog alert = builder.create();
              }else{
               //Nothing
              }
             }});         
     }
        }

解决方案

You haven't called the show() method. Do this:

AlertDialog alert = builder.create();
alert.show();

这篇关于自定义AlertDialog不显示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！