EditText聚焦時隱藏hint的代碼

只需讓EditText設置如下的OnFocusChangeListener就能夠了

private OnFocusChangeListener mOnFocusChangeListener = new OnFocusChangeListener() {
         @Override
         public void onFocusChange(View v, boolean hasFocus)
         {
             EditText textView = (EditText)v;
             String hint;
             if (hasFocus) {
                 hint = textView.getHint().toString();
                 textView.setTag(hint);
                 textView.setHint("");
             } else {
                 hint = textView.getTag().toString();
                 textView.setHint(hint);
             }
         }
     };

一進入一個頁面, EditText默認就會自動獲取焦點。解決之道：找一個EditText的父級控件，設置成

android:focusable="true"  
    android:focusableInTouchMode="true"