Question

我有几行代码来验证表单输入。但是，它不输出任何东西 - 只是一个空白框。我想念的是什么？

 public void onClick(View view)
 {
    if( view.getId() == R.id.btnLogin )
    {
        TestClass.setUsername( txtUserName.getEditableText().toString() );
        TestClass.setPassword( txtPassword.getEditableText().toString() );

        if( TestClass.getUsername().toString().length() == 0 )
        {
            this.txtUserName.setError( "Incorrect input!" );
        }
        else if( TestClass.getPassword().toString().length() == 0 )
        {
         this.txtPassword.setError( "Incorrect input!" );
        }
        else
        {
               // do the login stuff here
        }
     } 
  }

Answer 1

试试这个，

int ecolor = Color.RED; // whatever color you want
String estring = "Input is incorrect";  // your error message
ForegroundColorSpan fgcspan = new ForegroundColorSpan(ecolor);
SpannableStringBuilder ssbuilder = new SpannableStringBuilder(estring);
ssbuilder.setSpan(fgcspan, 0, estring.length(), 0);
myedittext.setError(ssbuilder);

来源：Android EditText.setError() yields invisible error text

Answer 2

使用Html对象轻松快速地格式化：

this.txtUserName.setError(Html.fromHtml("<font color='red'>Incorrect input!</font>"));

Answer 3

试试这段代码：

               if (editTextName.getText().toString().length() == 0) {
                    int ecolor = getResources().getColor(R.color.blue); // whatever color you want
                    String estring = "Input is incorrect";
                    ForegroundColorSpan fgcspan = new ForegroundColorSpan(ecolor);
                    SpannableStringBuilder builder = new SpannableStringBuilder(estring);
                    ssbuilder.setSpan(fgcspan, 0, estring.length(), 0);
                    editTextName.setError( builder );

                }

Answer 4

我刚刚更改了项目中的应用程序主题“清单文件，现在出现错误文本。

改变之前

：

android:theme="@android:style/Theme.Light.NoTitleBar"

更改后

：

android:theme="@android:style/Theme.Black.NoTitleBar"

Android setError（）保持空白

4 个答案: