setOnclickListner被初始化两次？ [英] setOnclickListner is initialized twice?

问题描述

 通code1 =（EditText上）findViewById（R.id.pass code1）;    通过code1.setOnKeyListener（新OnKeyListener（）{        @覆盖
        公共布尔安其（视图V，INT键code，KeyEvent的事件）{
             如果（键code == KeyEvent.KEY code_DEL）{
                 通过code1.requestFocus（）;
                 }
            返回false;
        }
    }）;
 

我在onCreate方法这上面code我一直破发点，并尝试调试我看到setOnKeyListner被调用或初始化两次。

解决方案

 通过code1.setOnKeyListener（新OnKeyListener（）{        @覆盖
        公共布尔安其（视图V，INT键code，KeyEvent的事件）{
             如果（键code == KeyEvent.KEY code_DEL＆放大器;＆安培; event.getAction（）== KeyEvent.ACTION_UP）{
                 //pass$c$c1.setText(null）;
                 通过code1.requestFocus（）;
                 返回true;
                 }
            返回false;
        }
    }）;
 

添加关键事件解决了这个问题

我的理解是，这是初始化两次，因为它已经创造BOX键并主要采取后续行动。

THATS Y I添加的项下检查，但仍然是一个TWICE初始化，但只能使用一次。

passCode1 = (EditText) findViewById(R.id.passCode1);

    passCode1.setOnKeyListener(new OnKeyListener() {

        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
             if(keyCode == KeyEvent.KEYCODE_DEL){  
                 passCode1.requestFocus();
                 }
            return false;
        }
    });

i have this above code in oncreate method i have kept break points and try to debug i see setOnKeyListner is called or initialized twice.

解决方案

        passCode1.setOnKeyListener(new OnKeyListener() {

        @Override
        public boolean onKey(View v, int keyCode, KeyEvent event) {
             if(keyCode == KeyEvent.KEYCODE_DEL && event.getAction() == KeyEvent.ACTION_UP){  
                 //passCode1.setText(null);
                 passCode1.requestFocus();
                 return true;
                 }
            return false;
        }
    });

ADDING KEY EVENT SOLVED THIS ISSUE

WHAT I UNDERSTOOD IS THAT IT IS INITIALIZED TWICE BECAUSE IT HAS TO CREATE FOR BOX KEY DOWN AND KEY UP ACTION

THATS Y I ADDED KEY DOWN CHECK, STILL IT IS INITIALIZED TWICE BUT USED ONLY ONCE

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