如果 TextView 显示特定文本,则将可见性设置为 GONE

Set visibility to GONE, if TextView displays a specific text

如果 TextView 显示特定文本,如 0% off,有什么办法可以将文本可见性设置为消失,否则可见。

就像这个代码

if(text.length() == 0 || text.equals(""))
            {
                mTel1.setVisibility(View.GONE);
            } else {
                mTel1.setVisibility(View.VISIBLE);
            }

您可以使用更改文本颜色来完成此操作

tvPoints.setTextColor(Color.TRANSPARENT);

是的,您可以在侦听器中实现您的逻辑,只要用户更改 EditText 中的文本,它就会触发。让你的 activity 实现 TextWatcher,然后在你的 activity 中尝试这样的事情:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    EditText ed = new EditText(this);
    ed.addTextChangedListener(this);
    setContentView(editText);

    // plus your current code
}

@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
    String ed_text = ed.getText();
    if (ed_text.length() == 0 || ed_text.equals("")) {
        mTel1.setVisibility(View.GONE);
    }
    else {
        mTel1.setVisibility(View.VISIBLE);
    }
}

注意:这个答案最初是在 OP 询问 EditText 时给出的。从那时起,OP 将问题更改为 TextView,但我上面的建议通常可用于任何侦听器(例如,任何正在更新 TextView 的侦听器)。

    final TextView text=findViewById(R.id.myTextView);


    text.addTextChangedListener(new TextWatcher() {
        @Override
        public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

        }

        @Override
        public void afterTextChanged(Editable editable) {

            if(editable.toString().equals("Your Text ")){

                // 1 - You can set empty text
                text.setText("");
                // 2 - Or you can change the color of the text
                text.setTextColor(Color.TRANSPARENT);
                // 3 - Or you can change the visibility of the view
                text.setVisibility(View.INVISIBLE);


            }else{

                //Here you should undo your code 

                //1 - if you using method one dose not need to do anything here 
                // for method 2 
                text.setTextColor(Color.BLACK);
                // for method 3
                text.setVisibility(View.VISIBLE);
            }


        }
    });

如果你想显示 1% offTextView 包装到 CardViewLinearLayout 并在 recyclerview 适配器中试试这个。

class ViewHolder extends RecyclerView.ViewHolder{

    public TextView discountedvalue;

    public CardView cardview;

    public ViewHolder(View itemView) {

        super(itemView);
        discountedvalue = (TextView) itemView.findViewById(R.id.DiscountValue);
        cardview = (CardView) itemView.findViewById(R.id.cardview);
        discountedvalue.addTextChangedListener(new TextWatcher() {
                @Override
                public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {

                }

                @Override
                public void onTextChanged(CharSequence charSequence, int i, int i1, int i2) {

                }

                @Override
                public void afterTextChanged(Editable editable) {

                    if(editable.toString().equals("0 % off")){

                        cardview.setVisibility(View.GONE);

                    }else{

                        cardview.setVisibility(View.VISIBLE);

                    }


                }
            });

    }
}