TextInputLayout的使用

TextInputLayout是具有meteria design效果的编剧框，使用起来效果会比普通的EditText更加漂亮。

基本使用就是在TextInputLayout里面放置一个EditText即可,注意它只接受一个子view那就是EditText，布局文件如下：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    tools:context="teststatusbar.com.xn.testnavigation.EtActivity">    <android.support.design.widget.TextInputLayout        android:id="@+id/user_input"        android:layout_width="240dp"        android:layout_height="wrap_content"        android:layout_gravity="center_horizontal"        android:layout_marginTop="200dp"        app:counterEnabled="true"        app:counterMaxLength="6"        app:hintEnabled="true">        <EditText            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:hint="请输入用户名" />    </android.support.design.widget.TextInputLayout>    <android.support.design.widget.TextInputLayout        android:id="@+id/password_input"        android:layout_width="240dp"        android:layout_height="wrap_content"        android:layout_gravity="center_horizontal"        app:counterEnabled="true"        app:counterMaxLength="6"        app:hintEnabled="true">        <EditText            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:hint="请输入密码" />    </android.support.design.widget.TextInputLayout></LinearLayout>

app:counterEnabled=”true”这个属性表示将输入的字符进行计数，这样在EditText的右下角就有了计数的文字。 app:counterMaxLength=”6”这个属性表示最大的输入数量为6。
下面直接上代码：

public class EtActivity extends AppCompatActivity {    TextInputLayout userInputLayout;    TextInputLayout passInputLayout;    TextWatcher watcher;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_et);        watcher = new wather();        userInputLayout = (TextInputLayout) findViewById(R.id.user_input);        passInputLayout = (TextInputLayout) findViewById(R.id.password_input);        userInputLayout.getEditText().addTextChangedListener(watcher);        userInputLayout.getEditText().addTextChangedListener(watcher);    }    class wather implements 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) {            if (userInputLayout.getEditText().getText().toString().length() > 6 ||                    passInputLayout.getEditText().getText().toString().length() > 6) {                userInputLayout.setErrorEnabled(true);                passInputLayout.setErrorEnabled(true);                passInputLayout.setError("输入字符必须少于6");                userInputLayout.setError("输入字符必须少于6");            }else{                userInputLayout.setErrorEnabled(false);                passInputLayout.setErrorEnabled(false);            }        }    }}

userInputLayout.setErrorEnabled(true)是和passInputLayout.setError(“输入字符必须少于6”)配合使用的，设置错误，我们在上面是判断输入字符的数量，如果超过6就弹出错误字符。