Question

我在另一个类中用于listview的Adapter类中有以下代码。

AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
builder.setTitle("Introduceti parola:");
final EditText input = new EditText(getContext());
input.setInputType(InputType.TYPE_CLASS_TEXT);
builder.setView(input);
builder.setPositiveButton("OK", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which)
    {
         hash.put("name", Rooms.name);
         hash.put("parola", input.getText().toString());
         site = siteul + "/join";
         new ATask((ViewHolder) v.getTag()).execute(site);
    }
});
builder.setNegativeButton("Cancel", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        dialog.cancel();
    }
});
builder.show();

问题在于，当我触发操作时，我在builder.show()行

处收到此错误

android.view.WindowManager$BadTokenException: Unable to add window -- token null is not for an application

我认为getContext()有错，但它在同一个Adapter类中的代码中不会产生任何错误：

Toast.makeText(getContext(), "Cool message!", Toast.LENGTH_LONG).show();

那可能是什么问题？

Answer 1

将getContext()替换为ActivityName.this。

Android Adapter AlertDialog错误

1 个答案: