Android 單擊操作后單選按鈕顏色變化

Question

RadioGroup rg = new RadioGroup(context);
for (int i = 0; i < formElement.getRadioOptions().size(); i++) {
                RadioButton radiobutton1 = new RadioButton(context);
                radiobutton1.setText(formElement.getRadioOptions().get(i).getValue());
                radiobutton1.setTextSize(TypedValue.COMPLEX_UNIT_PX, context.getResources().getDimension(R.dimen.meetingNoteCL));
                radiobutton1.setHighlightColor(context.getResources().getColor(R.color.text_color));
                rg.addView(radiobutton1);
            }
            textInputLayout.setTypeface(FontUtils.getFontTypeRegular(context));
            rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId) {
                    // checkedId is the RadioButton selected
                   
                    int radioButtonID = group.getCheckedRadioButtonId();
                    View radioButton = group.findViewById(radioButtonID);
                    int idx = group.indexOfChild(radioButton);
                    formElement.setKey(formElement.getRadioOptions().get(idx).getKey());
                    formElement.setValue(formElement.getRadioOptions().get(idx).getValue());

                }
            });

上面的單選按鈕代碼。，但是在選擇之后我需要將特定的單選按鈕顏色單獨更改為藍色。 你能幫忙嗎

Answer 1

onCheckedChanged 回調有一個 checkedId，你可以用它來獲取那個特定的按鈕

在將它們添加到組之前，您只需要為按鈕分配唯一的 ID。 這是您為實現該目的而修改的代碼。

RadioGroup rg = new RadioGroup(context);
for (int i = 0; i < formElement.getRadioOptions().size(); i++) {
                RadioButton radiobutton1 = new RadioButton(context);

//set a unique id

radiobutton1.setId(View.generateViewId());
              radiobutton1.setText(formElement.getRadioOptions().get(i).getValue());
                radiobutton1.setTextSize(TypedValue.COMPLEX_UNIT_PX, context.getResources().getDimension(R.dimen.meetingNoteCL));
                radiobutton1.setHighlightColor(context.getResources().getColor(R.color.text_color));
                rg.addView(radiobutton1);
            }
            textInputLayout.setTypeface(FontUtils.getFontTypeRegular(context));
            rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
                @Override
                public void onCheckedChanged(RadioGroup group, int checkedId) {
                    // checkedId is the RadioButton selected
                   
                    int radioButtonID = group.getCheckedRadioButtonId();
                    RadioButton radioButton = (RadioButton)group.findViewById(radioButtonID);

//if its checked then change it's tintlist

if(radioButton.isChecked()){
radioButton.setButtonTintList(ColorStateList.valueOf(ContextCompat.getColor(context,R.color.yourcolor)));
}
                    int idx = group.indexOfChild(radioButton);
                    formElement.setKey(formElement.getRadioOptions().get(idx).getKey());
                    formElement.setValue(formElement.getRadioOptions().get(idx).getValue());

                }
            });