Intent.createChooser（）显示样式？(Intent.createChooser() display style?)

 所以你的唯一目的是在用户输入控制台时隐藏角色。 在这种情况下，你是正确的轨道，你发布的代码看起来不错，除了最后一行，表示Choice1 += key; 。 它应该是 
 
Choice1 += key.KeyChar;
 
 您发布的代码有位修改 
 
string choice1=null; //casing of variable names
while (true)
{
    var key = System.Console.ReadKey(true);
    if (key.Key == ConsoleKey.Enter)
        break;

    choice1 += key.KeyChar;
 } 

So your sole intention is to hide the character while user types input in console. In that case you are in right track and your posted code looks good except the last line which says Choice1 += key;. It should be 
 
Choice1 += key.KeyChar;
 
Your posted code with bit modification
 
string choice1=null; //casing of variable names
while (true)
{
    var key = System.Console.ReadKey(true);
    if (key.Key == ConsoleKey.Enter)
        break;

    choice1 += key.KeyChar;
 }