android - 编辑文本 : Center hint but have entered text start from top

Question

您好，我有一个带有提示的编辑文本，我使用 android:gravity:"center" 将提示设为中间。当我从编辑文本中开始打字时，打字是从中间开始的，如何使打字从左角开始，同时仍然提示居中

<EditText
        android:id="@+id/edittext"
        android:layout_width="230dp"
        android:layout_height="110dp"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/imageView1"
        android:layout_marginLeft="5dp"
        android:layout_marginTop="33dp"
        android:layout_toLeftOf="@+id/relativeLayout1"
        android:background="@drawable/roundcorners"
        android:ems="10"
        android:gravity="center_horizontal"
        android:hint="@string/fbhint"
        android:lines="6"
        android:paddingRight="5dp"
        android:textSize="14sp"      
        android:windowSoftInputMode="stateHidden" />

Answer 1

我认为这不可能“开箱即用”，但您可以通过编程方式实现:

yourEditText.addTextChangedListener(new TextWatcher() {
     public void afterTextChanged(Editable s) {}
     public void beforeTextChanged(CharSequence s, int start, int count, int after) {}

     public void onTextChanged(CharSequence s, int start, int before, int count) {
          if (s.length() > 0){
               // position the text type in the left top corner
               yourEditText.setGravity(Gravity.LEFT | Gravity.TOP);  
          }else{
               // no text entered. Center the hint text.
               yourEditText.setGravity(Gravity.CENTER);  
          }
     }
}