键入时更改EditText中的字符？ Android的

时间：2013-12-08 00:50:48

标签： android android-edittext textchanged

我目前有一个使用各种计时器的应用程序，我有一个可以改变时间的编辑文本。我想添加一个功能，在输入一定数量的字符后自动插入冒号或句点，因为更改时间的语法是特定的（它必须是XX：XX.X）

我一直在玩它，当我尝试更改editText文本时，它只会给我一个错误。我尝试输入时出现错误。

我复制并粘贴了我在这里找到的一些代码并将其更改为符合我的需要/ 

editClock = (EditText) findViewById(R.id.editClock);       
editClock.addTextChangedListener(new TextWatcher(){
    int count =1 ;
    @Override
    public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2)
    {
        //System.out.println("beforeTextChanged::: => "+charSequence);
    }

    @Override
    public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {
        //System.out.println("onTextChanged::: => "+charSequence);
    }

    @Override
    public void afterTextChanged(Editable editable) {
        if(count==2)
            editClock.setText(editable.toString()+":");
        if(count==4)
            editClock.setText(editable.toString()+".");
        count++;     
    }
});

这是我得到的错误：

12-07 20:34:08.380: E/AndroidRuntime(13549): FATAL EXCEPTION: main
12-07 20:34:08.380: E/AndroidRuntime(13549): java.lang.StackOverflowError
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidtext.TextUtils.getChars(TextUtils.java:77)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidtext.TextUtils.indexOf(TextUtils.java:110)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidtext.StaticLayout.generate(StaticLayout.java:182)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidtext.DynamicLayout.reflow(DynamicLayout.java:284)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidtext.DynamicLayout.<init>(DynamicLayout.java:170)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.makeSingleLayout(TextView.java:6058)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.makeNewLayout(TextView.java:5956)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.checkForRelayout(TextView.java:6495)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3771)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3629)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.EditText.setText(EditText.java:80)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3604)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at com.example.timeonice.MainActivity$2.afterTextChanged(MainActivity.java:149)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.sendAfterTextChanged(TextView.java:7334)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3778)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3629)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.EditText.setText(EditText.java:80)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3604)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at com.example.timeonice.MainActivity$2.afterTextChanged(MainActivity.java:149)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.sendAfterTextChanged(TextView.java:7334)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3778)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3629)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.EditText.setText(EditText.java:80)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3604)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at com.example.timeonice.MainActivity$2.afterTextChanged(MainActivity.java:149)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.sendAfterTextChanged(TextView.java:7334)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3778)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3629)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.EditText.setText(EditText.java:80)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3604)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at com.example.timeonice.MainActivity$2.afterTextChanged(MainActivity.java:149)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.sendAfterTextChanged(TextView.java:7334)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3778)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3629)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.EditText.setText(EditText.java:80)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3604)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at com.example.timeonice.MainActivity$2.afterTextChanged(MainActivity.java:149)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.sendAfterTextChanged(TextView.java:7334)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3778)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3629)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.EditText.setText(EditText.java:80)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3604)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at com.example.timeonice.MainActivity$2.afterTextChanged(MainActivity.java:149)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.sendAfterTextChanged(TextView.java:7334)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3778)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3629)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.EditText.setText(EditText.java:80)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3604)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at com.example.timeonice.MainActivity$2.afterTextChanged(MainActivity.java:149)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.sendAfterTextChanged(TextView.java:7334)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3778)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3629)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.EditText.setText(EditText.java:80)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3604)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at com.example.timeonice.MainActivity$2.afterTextChanged(MainActivity.java:149)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.sendAfterTextChanged(TextView.java:7334)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3778)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3629)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.EditText.setText(EditText.java:80)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3604)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at com.example.timeonice.MainActivity$2.afterTextChanged(MainActivity.java:149)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.sendAfterTextChanged(TextView.java:7334)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3778)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.TextView.setText(TextView.java:3629)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at     androidwidget.EditText.setText(EditText.java:80)
12-07 20:34:08.380: E/AndroidRuntime(13549):    at an

1 个答案:

答案 0 :(得分：2)

您可以解决的一种方法是在代码中添加类级别标志。当您要调用setText（）并在之后清除它时设置标志。然后，在afterTextChanged（）的开头，检查你的标志。像这样：

 @Override
 public void afterTextChanged(Editable editable) {
   if (overridingText)
     return;

   if(count==2)
   {
     overridingText = true;
     editClock.setText(editable.toString()+":");
     overridingText = false;
   }
   else if(count==4)
   {
     overridingText = true;
     editClock.setText(editable.toString()+".");
     overridingText = false;
   }

   count++;     
 }

也许Google提供了更好的方法来实现这一目标。不过我不知道是不是。

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