zoukankan      html  css  js  c++  java
  • EditText监听事件

    • 源码
       /**
         * Adds a TextWatcher to the list of those whose methods are called
         * whenever this TextView's text changes.
         * <p>
         * In 1.0, the {@link TextWatcher#afterTextChanged} method was erroneously
         * not called after {@link #setText} calls.  Now, doing {@link #setText}
         * if there are any text changed listeners forces the buffer type to
         * Editable if it would not otherwise be and does call this method.
         */
     public void addTextChangedListener(TextWatcher watcher) {
          if (mListeners == null) {
               mListeners = new ArrayList<TextWatcher>();
          }
    
          mListeners.add(watcher);
      }
    
    • 示例:
    private EditText editText;
    
    private void initView(){
    	editText = (editText)findViewById(R.id.edit_text);
    }
    
    private void initEvents() {
    	editText.addTextChangedListener(new TextWatcher() {
                @Override
                public void beforeTextChanged(CharSequence s, int start, int count, int after) {
                    Log.i(TAG, "beforeTextChanged: 输入过程中执行该方法");
                }
    
                @Override
                public void onTextChanged(CharSequence s, int start, int before, int count) {
                    Log.i(TAG, "onTextChanged: 输入前确认执行该方法");
                }
    
                @Override
                public void afterTextChanged(Editable s) {
    		Log.i(TAG, "afterTextChanged: 输入结束执行该方法");
                }
            });
    
    }
    
    有梦为马,游历天涯!
  • 相关阅读:
    ant-design中日历之自定义头部加上返回今日
    centos7(虚拟机)下安装nginx
    centos7(虚拟机)下安装redis
    log4net
    Autofac
    Utilities
    实体转换类
    CG——Possion Image Editing
    CSC3002学习笔记
    serving 源码
  • 原文地址:https://www.cnblogs.com/qijianguo/p/10180877.html
Copyright © 2011-2022 走看看