Question

在全屏模式下打开edittext时如何显示提示文字？我可以使用OnFocusChangeListener显示提示文本。

 editChangeName.setOnFocusChangeListener(new View.OnFocusChangeListener() {
        @Override
        public void onFocusChange(View view, boolean b) {
            editChangeName.setHint(b ? getResources().getString(R.string.name) : "");
        }
    });

但是

关闭edittext后如何隐藏提示文本？

Answer 1

   // assuming you have a EditText view with id 
   View viewById = getView().findViewById(R.id.editTextId);
   if(viewById!=null) {
           //  set listener to this view "many views could share one listener"
           viewById.setOnFocusChangeListener(new View.OnFocusChangeListener() {
               @Override
                public void onFocusChange(View v, boolean hasFocus) {
                    // if view match id &&  has no focus 
                    if(v.getId() == R.id.editTextId && !hasFocus) 
                             // clear hint 
                             ((EditText) v).setHint(null);
                    // else show hint 
                }
          });
   }

hasFocus＆lt; - 如名字所示

有（true） - ＆gt;秀
没有（假） - ＆gt;隐藏

如果您不确定按ID分配的是您分配给编辑文本的那个，请进行检查（仔细检查不会受到影响）

  if (EditText.class.isAssignableFrom(v.getClass()))
     // do cast  
     EditText editText = (EditText) v;

此代码是正确的。但。关闭softkeyboard后如何隐藏hinttext ... edittext有焦点 - Eugenu Yansky

Detecting when user has dismissed the soft keyboard

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启用fullsreen模式时显示/隐藏editText的提示文本

1 个答案: