Android中EditText带删除按钮

1、说明

本文是通过在EditText右侧放置一个ImageView删除按钮来实现，内容的删除；另有一种是通过自定义EditView实现。

效果图如下;

2、具体实现代码

               //输入内容时显示删除按钮
    protected void setVisibility(ImageView iv, CharSequence s) {
        iv.setVisibility(s.length() > 0 ? View.VISIBLE : View.INVISIBLE);
    }
    //获得焦点，以及有内容时，显示删除按钮
    protected void setVisibility(ImageView iv, boolean focus, int len) {
        iv.setVisibility((focus &&  len > 0)? View.VISIBLE : View.INVISIBLE);
    }
    //一个文本编辑框的监听
    protected void initEditClearListener(EditText et1, final ImageView iv1) {
        //焦点变化监听者
        et1.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                EditText e= (EditText) v;
                setVisibility(iv1, hasFocus, e.getText().length());
            }
        });
        //内容变化监听者
        et1.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {
                setVisibility(iv1, s);
            }

            @Override
            public void afterTextChanged(Editable s) {

            }
        });
    }
    //两个文本编辑框的监听
    protected void initEditClearListener(EditText et1, final ImageView iv1, EditText et2, final ImageView iv2) {
        initEditClearListener(et1, iv1);
        initEditClearListener(et2, iv2);
    }
    //三个文本编辑框的监听
    protected void initEditClearListener(EditText et1, final ImageView iv1, EditText et2, final ImageView iv2, EditText et3, final ImageView iv3) {
        initEditClearListener(et1, iv1, et2, iv2);
        initEditClearListener(et3, iv3);
    }public class LoginActivity extends BaseActivity {

    //省略了控件的声明实例化
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //调用父类的EditText监听者，传入对应EditText对象跟删除按钮对象
        initEditClearListener(mAccountEt, clearActIv, mPasswordEt, clearPawIv);
    }
    
}