Question

我正在研究android应用程序，我想在我的imageView点击监听器上创建一个选择对话框。没有对话框它工作正常，但当我添加带有列表的对话框时，它显示异常。我的代码和错误堆栈如下：

profileImage.setOnClickListener(new View.OnClickListener() {
               //@Override
               public void onClick(View v) {
                   Toast.makeText(getApplicationContext(), "ImageClicked",
                            Toast.LENGTH_SHORT).show();     

                   final CharSequence[] items = {"Red", "Green", "Blue"};
                   AlertDialog.Builder builder = new AlertDialog.Builder(getApplicationContext());
                   builder.setTitle("Pick a color");
                   builder.setCancelable(false);
                 //  builder.setPositiveButton(R.string.dialog_action_dismiss, null);

                   // creating a single choice item menu (radio buttons list)
                   // -1 indicates that no item should be selected by default
                   // pass index argument starting from 0 to preselect an item if required
                   builder.setSingleChoiceItems(items, -1, new DialogInterface.OnClickListener() {
                     public void onClick(DialogInterface dialog, int item) {
                       Toast.makeText(getApplicationContext(), items[item], Toast.LENGTH_SHORT).show();
                     }
                   });

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

               }        
            });

11-25 20:03:02.625: E/AndroidRuntime(17343): android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application
11-25 20:03:02.625: E/AndroidRuntime(17343):    at android.view.ViewRootImpl.setView(ViewRootImpl.java:650)
11-25 20:03:02.625: E/AndroidRuntime(17343):    at android.view.WindowManagerGlobal.addView(WindowManagerGlobal.java:248)
11-25 20:03:02.625: E/AndroidRuntime(17343):    at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:69)
11-25 20:03:02.625: E/AndroidRuntime(17343):    at android.app.Dialog.show(Dialog.java:281)

Answer 1

将getApplicationContext()更改为v.getContext()

图像视图上的警报对话框单击android中的侦听器

1 个答案: