Android 一个美观简洁的登录界面

<?xml version="1.0" encoding="utf-8"?>
<!--登录界面,用LinearLayout-->
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@drawable/wallpaper_11"
    android:orientation="vertical">
 
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="35dp">
 
        <ImageView
            android:id="@+id/symbol"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            />
 
        <TextView
            android:layout_marginLeft="20dp"
            android:id="@+id/qq"
            android:layout_width="wrap_content"
            android:layout_marginTop="35dp"
            android:text="仿QQ"
            android:textColor="@color/white"
            android:textSize="24sp"
            android:layout_height="wrap_content" />
    </LinearLayout>
    <!--输入框-->
    <EditText
        android:id="@+id/et_user_name"
        android:layout_width="320dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:paddingLeft="10dp"
        android:theme="@style/MyEditText"
        android:drawablePadding="@dimen/dp_10"
        android:drawableLeft="@mipmap/msg_icon"
        android:textColor="@color/white"
        android:textColorHint="@color/white"
        android:layout_marginTop="60dp"
        android:hint="账号"
        android:textSize="20sp" />
    <!--输入框-->
    <EditText
        android:id="@+id/et_psw"
        android:layout_width="320dp"
        android:layout_height="wrap_content"
        android:layout_gravity="center"
        android:layout_marginTop="10dp"
        android:hint="密码"
        android:drawablePadding="@dimen/dp_10"
        android:drawableLeft="@mipmap/msg_icon"
        android:textColor="@color/white"
        android:paddingLeft="10dp"
        android:theme="@style/MyEditText"
        android:textColorHint="@color/white"
        android:textSize="20sp"
        android:inputType="textPassword"/>
    <!--按钮-->
    <Button
        android:id="@+id/btn_login"
        android:text="登录"
        android:background="#1E90FF"
        android:textSize="24sp"
        android:textColor="@color/white"
        android:layout_gravity="center"
        android:layout_marginTop="20dp"
        android:layout_width="320dp"
        android:layout_height="wrap_content"/>
 
    <RelativeLayout
        android:layout_marginTop="15dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <TextView
            android:id="@+id/tv_register"
            android:layout_alignParentRight="true"
            android:layout_marginRight="20dp"
            android:textColor="@color/white"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="新用户注册"/>
        <!--layout_weight="1" layout_width="0dp"实现均分效果-->
        <TextView
            android:id="@+id/tv_find_psw"
            android:layout_alignParentLeft="true"
            android:layout_marginLeft="20dp"
            android:textColor="@color/white"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="忘记密码？" />
    </RelativeLayout>
    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
        <RelativeLayout
            android:layout_gravity="center"
            android:layout_marginBottom="30dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content">
 
            <TextView
                android:textColor="@color/white"
                android:layout_alignParentBottom="true"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="登录即代表阅读并同意服务条款" />
        </RelativeLayout>
    </LinearLayout>
</LinearLayout>

 <style name="MyEditText" parent="Theme.AppCompat.Light">
        <item name="colorControlNormal">@color/white</item>
        <item name="colorControlActivated">@color/colorConfirm</item>
    </style>

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:android="http://schemas.android.com/apk/res/android"
 android:shape="rectangle">
 <size android:width="2dp" />
 <solid android:color="@android:color/holo_blue_light" />
</shape>

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
 <item android:state_focused="false" android:drawable="@drawable/et_underline_unselected"/>
 <item android:state_focused="true" android:drawable="@drawable/et_underline_selected"/>
</selector>

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
 <item
  android:bottom="0dp"
  android:left="-2dp"
  android:right="-2dp"
  android:top="-2dp">
  <shape>
   <solid android:color="@android:color/transparent" />
   <stroke
    android:width="1dp"
    android:color="@android:color/darker_gray" />
   <padding android:bottom="4dp" />
  </shape>
 </item>
 
</layer-list>

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
 
 <item
  android:bottom="0dp"
  android:left="-2dp"
  android:right="-2dp"
  android:top="-2dp">
  <shape>
   <solid android:color="@android:color/transparent" />
   <stroke
    android:color="@android:color/holo_green_light"
    android:width="2dp" />
   <padding android:bottom="4dp" />
 
  </shape>
 </item>
 
</layer-list>

/**初始化EditText,默认都为未选中状态**/
editText1.setBackgroundResource(R.drawable.et_underline_unselected);
editText2.setBackgroundResource(R.drawable.et_underline_unselected);
/**第一个EditText的焦点监听事件**/
editText1.setOnFocusChangeListener(new View.OnFocusChangeListener() {
 @Override
 public void onFocusChange(View v, boolean hasFocus) {
  if (hasFocus) {
   Log.e(TAG, "EditText1获得焦点");
   editText1.setBackgroundResource(R.drawable.et_underline_selected);
 
  } else {
   Log.e(TAG, "EditText1失去焦点");
   editText1.setBackgroundResource(R.drawable.et_underline_unselected);
  }
 }
});
/**第二个EditText的焦点监听事件**/
editText2.setOnFocusChangeListener(new View.OnFocusChangeListener() {
 @Override
 public void onFocusChange(View v, boolean hasFocus) {
  if (hasFocus) {
   Log.e(TAG, "EditText2获得焦点");
   editText2.setBackgroundResource(R.drawable.et_underline_selected);
 
  } else {
   Log.e(TAG, "EditText2失去焦点");
   editText2.setBackgroundResource(R.drawable.et_underline_unselected);
  }
 }
});