如何在android中清除EditText的内容？ [英] how to clear EditText's Content in android ?

问题描述

伙计们。我正在研究我的Android应用程序。我创建了一个活动。这个活动有两个EditText。其中一个用于用户名，另一个用于密码。现在我想创建一个方法来清除（编辑文本），用户点击。我试图得到（EditText）的id。我想，如果我有（EditText）的id，我可以删除内容，但它没有用。令人惊讶的是，我有一个异国情调我使用这种方法来获取EditText的id，但它显示了一个数字！ 我根本没用这个号码作为身份证！

  public   void  getViewId（View view）{
  int  id = view.getId（）; 
 Toast.makeText（ this ， String  .valueOf（id），Toast.LENGTH_LONG）。节目（）; 
} 

id：2131296262

 <   EditText   
           android：id   =  @ + id / etUserName   
           android：layout_width   =  fill_parent  
           android：layout_height   =  fill_parent  
           android：gravity   =  center  
           android：layout_marginLeft   =  @ dimen / first_input_margin  
          < span class =code-attribute> android：layout_marginRight   =  @ dimen / first_input_margin  
           android：layout_marginBottom   =  @ dimen / first_input_margin  
           android：layout_marginTop   =  @ dimen / first_input_margin  
      < span class =code-attribute>     android：textSize   = < span class =code-keyword> @ dimen / first_input_txt  
           android：已删除  =  @ color / White  
           android：text   = 输入您的用户名  
           android：/  >  
 

因为你看到id是etUserName而不是数字id！我认为这个数字在运行时被固定到EditText。

我可以清除这个数字ID的EditText的内容吗？或者我必须改变我的方法？谢谢你告诉我。

解决方案

这是我的TextView代码。



1。参考视图

 this.inputText =（TextView）findViewById（R.id.catText）; 

2.设置文本

 this.inputText.setText（）; 

< blockquote>我找到了。这是我的解决方案。

因为你知道我有多个EditText。但我们的方法必须清除用户点击的EditText。

你唯一应该做的就是获取id并使用它来清除特定的编辑文本。

i认为android在运行时为每个活动元素生成一个数字id 。此ID与您用于查看的ID不同。这是一个数字ID，而且这个id也是唯一的。

  public   void  ClearEt（查看视图）{
  int  id = view.getId（）; 
 EditText et =（EditText）findViewById（id）; 
 et.setText（ ）; 
 
} 

hi guys . iam working on my android application . i created an activity . this activity has two EditText . one of them is used for User name and another one for password . now I want to create a method to clear (Edit Text) which is clicked by user . i tried to get (EditText)'s id . i thought , if i have (EditText)'s id , i can remove the content but it did'nt work . surprisingly i got an exotic id . i used this method to get EditText's id but it Showed me a number ! i didnt use this number as id at all !

public void getViewId(View view){
        int id=view.getId();
        Toast.makeText(this, String.valueOf(id), Toast.LENGTH_LONG).show();
    }

id: 2131296262

<EditText
    android:id="@+id/etUserName"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:gravity="center"
    android:layout_marginLeft="@dimen/first_input_margin"
    android:layout_marginRight="@dimen/first_input_margin"
    android:layout_marginBottom="@dimen/first_input_margin"
    android:layout_marginTop="@dimen/first_input_margin"
    android:textSize="@dimen/first_input_txt"
    android:removed="@color/White"
    android:text="Enter your User Name"
    android:/>

as you see the id is "etUserName" not a numeric id ! i think this number is fastened to EditText during the run time .
can i clear EditText's Content whit this numeric id ? or i have to change my method ? thank you for letting me know .

解决方案

Here's my code for TextView.

1 . Reference to View

this.inputText = (TextView) findViewById(R.id.catText);

2. set text

this.inputText.setText("");

i found it . this is my solution .
as you know i have more than one EditText . but our method has to clear EditText which is clicked by user .
the only thing you should do is to get id and use it to clear specific Edit Text .
i think android produce a numeric id for every Elements in activity during the Run time . this id is not same as id which you used for view . this is a numeric id , and also this id is unique .

 public void  ClearEt(View view){
    int id=view.getId();
    EditText et=(EditText)findViewById(id);
    et.setText("");

}

这篇关于如何在android中清除EditText的内容？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！