In this android programming source code example, we are going to add onCheckedChanged listener to RadioGroup in Android.
You can copy and adopt this source code example to your android project without reinventing the wheel.
Below is a step by step source code to add onCheckedChanged listener to RadioGroup in Android.
activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_margin="10dp" android:orientation="vertical" tools:context=".radiobutton.RadioButton13"> <TextView android:id="@+id/textView25" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="RadioGroup OnCheckedChangeListener" /> <RadioGroup android:id="@+id/radio" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical"> <RadioButton android:id="@+id/radioButton1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="RadioButton1" /> <RadioButton android:id="@+id/radioButton2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="RadioButton2" /> </RadioGroup> </LinearLayout>
MainActivity.java
import android.os.Bundle; import android.support.v7.app.AppCompatActivity; import android.widget.RadioButton; import android.widget.RadioGroup; public class RadioButton14 extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_radio_button14); RadioGroup radioGroup = findViewById(R.id.radio); final RadioButton radioButton = findViewById(R.id.radioButton1); final RadioButton radioButton1 = findViewById(R.id.radioButton2); radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() { @Override public void onCheckedChanged(RadioGroup group, int checkedId) { if (checkedId == R.id.radioButton1){ radioButton.setTextColor(getResources().getColor(R.color.colorAccent)); radioButton1.setTextColor(getResources().getColor(R.color.colorPrimaryDark)); } if (checkedId == R.id.radioButton2){ radioButton.setText("OnCheckedChangeListener"); } } }); } }
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