android中EditText一键清除实现

╰半夏微凉° 2022-02-05 12:49 443阅读 0赞

## 基本思路: ##

1.在Edittext右边添加一个有着叉叉背景的Button(或图片);  
2.根据Edittext的情况进行判断Button(或图片)是否要显示或隐藏.

## 布局效果图 ##

![布局效果图][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hoZGh6_size_16_color_FFFFFF_t_70]

## 布局相关代码： ##

![布局相关代码][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hoZGh6_size_16_color_FFFFFF_t_70 1]  
获取图片中的图标可以[点击][Link 1]

## 主要功能的实现封装成一个工具类EditTextUtils: ##

import android.text.Editable;
    import android.text.TextUtils;
    import android.text.TextWatcher;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.EditText;
    
    /**
     * Author by wzh,Date on 2019/4/25.
     * PS: Not easy to write code, please indicate.
     */
    public class EditTextUtils {
        public static void clearButtonListener(final EditText et, final View view) {
            // 取得et中的文字
            String etInputString = et.getText().toString();
            // 根据et中是否有文字进行X可见或不可见的判断
            if (TextUtils.isEmpty(etInputString)) {
                view.setVisibility(view.INVISIBLE);
            } else {
                view.setVisibility(View.VISIBLE);
            }
            //点击X时使et中的内容为空
            view.setOnClickListener(new OnClickListener() {
                @Override
                public void onClick(View v) {
                    et.setText("");
                    et.requestFocusFromTouch();
                }
            });
            //对et的输入状态进行监听
            et.addTextChangedListener(new TextWatcher() {
    
                @Override
                public void onTextChanged(CharSequence s, int start, int before, int count) {
    
                }
    
                @Override
                public void beforeTextChanged(CharSequence s, int start, int count, int after) {
    
                }
    
                @Override
                public void afterTextChanged(Editable s) {
                    if (s.length() == 0) {
                        view.setVisibility(View.INVISIBLE);
                    } else {
                        view.setVisibility(View.VISIBLE);
                    }
                }
            });
        }
    }

## MainActivity相关代码： ##

![MainActivity相关代码][MainActivity]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hoZGh6_size_16_color_FFFFFF_t_70]: /images/20220205/db3197e212f04b1d821738e2dd35b2f2.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hoZGh6_size_16_color_FFFFFF_t_70 1]: /images/20220205/ec18f802fe774ed48805b3e1c9ad7e52.png
[Link 1]: https://download.csdn.net/download/hhdhz/11160853
[MainActivity]: /images/20220205/f1e53ea08efe4fa5b44f41e507425b8b.png