如何在 Android 中以编程方式设置单选按钮的（选中）状态？

Question

我有一个带阀门的无线设备，它通过蓝牙 LE 连接到 Android 应用程序。在应用程序中，我有一个 activity 布局，在 radioGroup 中有 2 个 radioButtons。启动时，我需要查询外部设备以确定阀门的当前状态，并相应地在 App 中设置一个单选按钮。我的基本策略如下...

private RadioGroup valveStateRadioGroup;
private RadioButton valveOnRadioButton;
private RadioButton valveOffRadioButton;

static boolean valveOn = false;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // set view and init Bluetooth stuff here

    valveStateRadioGroup = (RadioGroup) findViewById(R.id.valve_State_Radio_Group);
    valveOnRadioButton = (RadioButton) findViewById(R.id.valve_on_radioButton);
    valveOffRadioButton = (RadioButton) findViewById(R.id.valve_off_radioButton);

    valveStateRadioGroup.clearCheck();

    valveStateRadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener(){
        public void onCheckedChanged(RadioGroup group, int checkedId) {
                // do normal radioButton CLICKED stuff here
        }
    });
    queryValveState(); // call coms routine to get initial device status
}

public void queryValveState() {
    // code here that sends out a wireless query to the device
}

@Override
public synchronized void onDataAvailable(BluetoothGattCharacteristic characteristic) {
    //reply received from device, parse packet, determine valve status
    valveOn = false; // based on reply from device
    refeshUi();
}

private void refeshUi() {
    if (valveOn) {
        valveOnRadioButton.setChecked(true);
    }
    else {
        valveOffRadioButton.setChecked(true); // <<<<<<<<<<<< THIS is the problem
}

我遇到的问题是，当 valveOffRadioButton.setChecked(true) 触发时，它永远不会依次触发 OnCheckedChangeListener，也不会更新 UI 中的 Widget。如果我在 onCreate() 中设置单选按钮的状态，我就可以设置它。我想我的实际问题是......如何在 onCreate() 之外的例程中设置 radioButton？

Answer 1

valveOnRadioButton.setChecked（真）；

Answer 2

感谢 Muthukrishnan Rajendran 的回答...

private void refeshUi() {
    runOnUiThread(new Runnable() {
        public void run() {
            if (valveOn) {
                valveOnRadioButton.setChecked(true);
            }
            else {
                valveOffRadioButton.setChecked(true);
            }
        }
    });
}

Answer 3

回答晚了，但这对我有用：

((RadioButton)radioGroup.getChildAt(0)).setChecked(true);

此致

如何在 Android 中以编程方式设置单选按钮的（选中）状态？

How to set the (checked) state of a radiobutton programmatically in Android?

android

android-radiobutton