<!--
通过修改<color name="colorAccent">#023cfa</color>可以修改正确提示文本的颜色
添加<item name="android:textColorPrimary">@color/textColorPrimary</item>属性可以修改输入文本的颜色
-->
<android.support.design.widget.TextInputLayout
android:id="@+id/text_input_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<EditText
android:layout_width="match_parent"
android:layout_height="48dp"/>
</android.support.design.widget.TextInputLayout>
public class MainActivity extends AppCompatActivity {
private TextInputLayout textInputLayout;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
textInputLayout = (TextInputLayout) findViewById(R.id.text_input_layout);
textInputLayout.setHint("请输入邮箱地址");
//获取到TextInputLayout包裹的EditText
EditText editText = textInputLayout.getEditText();
editText.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
}
@Override
public void afterTextChanged(Editable s) {
//如果不包含@认为是非法邮箱地址
if (!s.toString().contains("@")) {
//允许TextInputLayout显示错误信息
textInputLayout.setErrorEnabled(true);
//设置错误信息
textInputLayout.setError("邮箱地址非法");
} else {
textInputLayout.setErrorEnabled(false);
}
}
});
}
}