Google在2015的IO大会上，给我们带来了更加详细的Material Design设计规范，同时，也给我们带来了全新的Android Design Support Library，Android Design Support Library的兼容性更广，直接可以向下兼容到Android 2.2

下面我们用TextInputLayout构造一个酷炫的登录框架

先上效果图：

要使用Design Support Library现在gradle中加入

compile 'com.android.support:design:23.4.0'

登录页面的布局：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical"  android:paddingBottom="@dimen/activity_vertical_margin"  android:paddingLeft="@dimen/activity_horizontal_margin"  android:paddingRight="@dimen/activity_horizontal_margin"  android:paddingTop="@dimen/activity_vertical_margin"  tools:context="com.lg.logindemo.MainActivity">  <TextView  android:layout_width="match_parent"  android:layout_height="200dp"  android:gravity="center"  android:text="Welcome"  android:textColor="@color/colorPrimary"  android:textSize="30dp" />  <android.support.design.widget.TextInputLayout  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="10dp">  <EditText  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:hint="Username"  android:paddingLeft="10dp"  android:paddingRight="10dp"  android:singleLine="true" />  </android.support.design.widget.TextInputLayout>  <android.support.design.widget.TextInputLayout  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="10dp">  <EditText  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:hint="Password"  android:inputType="textPassword"  android:paddingLeft="10dp"  android:paddingRight="10dp"  android:singleLine="true" />  </android.support.design.widget.TextInputLayout>  <android.support.v7.widget.AppCompatButton  android:id="@+id/login"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="20dp"  android:background="@color/colorPrimary"  android:onClick="onLogin"  android:text="LOGIN"  android:textColor="@android:color/white"  android:textSize="20sp"  android:textStyle="bold" />  <TextView  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="10dp"  android:gravity="center"  android:onClick="register"  android:text="No account yet?Create one"  android:textSize="16sp"  android:textStyle="bold" />
</LinearLayout>

TextInputLayout 继承于LinearLayout也是一个布局，要配合它的子控件来显示出想要的效果，这里谷歌把它专门设计用来包裹EditText(或者EditText的子类)，然后当用户进行输入动作的时候我们设置的android:hint 提示就会以动画的形式运动到左上角

public class MainActivity extends AppCompatActivity {  private Button button;  @Override  protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);  setTitle("Login");  button=(Button)findViewById(R.id.login);  button.setOnClickListener(new View.OnClickListener() {  @Override  public void onClick(View v) {  Toast.makeText(MainActivity.this,"Login Successful",Toast.LENGTH_SHORT).show();  }  });  }  //注册public void register(View view){  startActivity(new Intent(this,RegisterAcitvity.class));  }
}

很简单，只是为了画个框架，可以根据需求自己完善

下面是注册页面的布局：

<?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"  android:paddingBottom="@dimen/activity_vertical_margin"  android:paddingLeft="@dimen/activity_horizontal_margin"  android:paddingRight="@dimen/activity_horizontal_margin"  android:paddingTop="@dimen/activity_vertical_margin"  tools:context="com.lg.logindemo.RegisterAcitvity">  <android.support.design.widget.TextInputLayout  android:layout_width="match_parent"  android:layout_height="wrap_content"  app:counterEnabled="true"  app:counterMaxLength="6"  app:counterOverflowTextAppearance="@style/ErrorStyle"  android:layout_marginTop="10dp"  >  <EditText  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:hint="Username"  android:paddingLeft="10dp"  android:paddingRight="10dp"  android:singleLine="true" />  </android.support.design.widget.TextInputLayout>  <android.support.design.widget.TextInputLayout  android:layout_width="match_parent"  android:layout_height="wrap_content"  app:counterEnabled="true"  app:counterMaxLength="12"  app:counterOverflowTextAppearance="@style/ErrorStyle"  android:layout_marginTop="10dp">  <EditText  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:hint="Password"  android:inputType="textPassword"  android:paddingLeft="10dp"  android:paddingRight="10dp"  android:singleLine="true" />  </android.support.design.widget.TextInputLayout>  <android.support.design.widget.TextInputLayout  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="10dp">  <EditText  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:hint="Email"  android:inputType="textEmailAddress"  android:paddingLeft="10dp"  android:paddingRight="10dp"  android:singleLine="true" />  </android.support.design.widget.TextInputLayout>  <android.support.design.widget.TextInputLayout  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="10dp">  <EditText  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:hint="Phone"  android:inputType="phone"  android:paddingLeft="10dp"  android:paddingRight="10dp"  android:singleLine="true" />  </android.support.design.widget.TextInputLayout>  <RadioGroup  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="10dp"  android:orientation="horizontal">  <android.support.v7.widget.AppCompatRadioButton  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_weight="1"  android:text="Male"  android:textSize="16sp" />  <android.support.v7.widget.AppCompatRadioButton  android:layout_width="wrap_content"  android:layout_height="wrap_content"  android:layout_weight="1"  android:text="Female"  android:textSize="16sp" />  </RadioGroup>  <android.support.v7.widget.AppCompatButton  android:id="@+id/register"  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:layout_marginTop="20dp"  android:background="@color/colorPrimary"  android:text="CREATE ACCOUNT"  android:textColor="@android:color/white"  android:textSize="20sp" />
</LinearLayout>

android:singleLine="true"属性设置单行显示


设置app:counterEnabled="true" 打开Edittext右下角字数统计，app:counterMaxLength="6"设置它的长度

但要谨记，使用这个功能的时候必须加上 app:counterOverflowTextAppearance属性，不然程序很报错

自定义ErrorStyle样式:

<style name="ErrorStyle">  <item name="android:textColor">@color/colorAccent</item>
</style>

当然，如果想要修改Edittext框的选中颜色可以修改AppTheme中的colorAccent属性

<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">  <!-- Customize your theme here. -->  <item name="colorPrimary">@color/colorPrimary</item>  <item name="colorPrimaryDark">@color/colorPrimaryDark</item>  <item name="colorAccent">@color/colorPrimary</item>
</style>

源码地址：http://down.51cto.com/data/2222023