EditText下的Error Text popup

Question

我尝试了很多并做过R＆amp; D，但无法在EditText下显示自己的自定义错误。

这是我的代码：

String str = "Please enter a valid email address”;

// This line is used to give color to error text.
ForegroundColorSpan colorSpan = new ForegroundColorSpan(Color.YELLOW);

// This line is used to give background color to error text.
BackgroundColorSpan backColorSpan = new BackgroundColorSpan(Color.BLUE);

// This s basically a StringBuilder that implements CharSequence interface. 
SpannableStringBuilder strBuilder = new SpannableStringBuilder(str);

strBuilder.setSpan(colorSpan, 0, str.length(), 0);
EditText et = (EditText)findViewById(R.id.et);
Drawable drawable = getResources().getDrawable(R.drawable.btn);

// This line shows our own icon in place of default icon. 
setError(CharSequence, Drawable);

So, strBuilder in next line is an implementation of CharSequence.
et.setError(strBuilder, drawable);

任何解决方案？

Answer 1

您可以使用TextInputLayout，它内置了此功能。

检查此链接，它正是您所需要的：

http://code.tutsplus.com/tutorials/creating-a-login-screen-using-textinputlayout--cms-24168

有关详细信息，请查看Google开发者

https://developer.android.com/reference/android/support/design/widget/TextInputLayout.html

Answer 2

我找到了解决方案。

您需要在drawable对象上调用setBound（）方法。 你需要把这一行：

drawable.setBounds(0,0,drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());