Android中EditText帶刪除按鈕

1、說明

本文是通過在EditText右側放置一個ImageView刪除按鈕來實現，內容的刪除；另有一種是通過自定義EditView實現。

效果圖如下;

2、具體實現代碼

               //輸入內容時顯示刪除按鈕
    protected void setVisibility(ImageView iv, CharSequence s) {
        iv.setVisibility(s.length() > 0 ? View.VISIBLE : View.INVISIBLE);
    }
    //獲得焦點，以及有內容時，顯示刪除按鈕
    protected void setVisibility(ImageView iv, boolean focus, int len) {
        iv.setVisibility((focus &&  len > 0)? View.VISIBLE : View.INVISIBLE);
    }
    //一個文本編輯框的監聽
    protected void initEditClearListener(EditText et1, final ImageView iv1) {
        //焦點變化監聽者
        et1.setOnFocusChangeListener(new View.OnFocusChangeListener() {
            @Override
            public void onFocusChange(View v, boolean hasFocus) {
                EditText e= (EditText) v;
                setVisibility(iv1, hasFocus, e.getText().length());
            }
        });
        //內容變化監聽者
        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) {

            }
        });
    }
    //兩個文本編輯框的監聽
    protected void initEditClearListener(EditText et1, final ImageView iv1, EditText et2, final ImageView iv2) {
        initEditClearListener(et1, iv1);
        initEditClearListener(et2, iv2);
    }
    //三個文本編輯框的監聽
    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 {

    //省略了控件的聲明實例化
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //調用父類的EditText監聽者，傳入對應EditText對象跟刪除按鈕對象
        initEditClearListener(mAccountEt, clearActIv, mPasswordEt, clearPawIv);
    }
    
}