获取以编程方式创建的视图标签

get view tag created programmatically

在 onCreate() 方法中,我正在以编程方式创建带有标签的 TextEdit,如下所示:

EditText et = new EditText(getApplicationContext());
et.setTag(field.getFieldId());
et.setBackgroundResource(R.drawable.textbox);
et.setTextColor(getResources().getColor(R.color.noir));

parentLayout.addView(et);

在 afterTextChanged() 方法中,我想检索该 EditText 标签以获取用户输入的文本。

我试过这段代码,但我得到 NullPointerException:

EditText et = (EditText) parentLayout.findViewWithTag("4249");
String strValue = et.getText().toString();

你能帮帮我吗!!

谢谢。

嗯,我自己找到了解决办法。

1) 以编程方式创建 EditText,设置自定义 TextWatcher 并将 EditText 添加到其中:

EditText et = new EditText(getApplicationContext());
                    et.setTag(field.getFieldId());
                    et.setBackgroundResource(R.drawable.textbox);
                    et.setTextColor(getResources().getColor(R.color.noir));
et.addTextChangedListener(new CustomTextWatcher(et));

2) 创建自定义 TextWatcher:

private class CustomTextWatcher implements TextWatcher{

          private EditText editText;

          private MyTextWatcher(EditText editText) {
           this.editText = editText;
          }
        @Override
        public void beforeTextChanged(CharSequence s, int start, int count,
                int after) {
            // TODO Auto-generated method stub

        }
        @Override
        public void onTextChanged(CharSequence s, int start, int before,
                int count) {
            // TODO Auto-generated method stub

        }
        @Override
        public void afterTextChanged(Editable s) {

            String strValue = this.editText.getText().toString();
            Log.d("afterTextChanged", strValue);

        }
    }

希望对其他开发者有所帮助。