How to use

setChecked

method

in

android.widget.RadioButton

 private void processRadioButtonClick(CompoundButton buttonView){

  for (RadioButton button : radioButtons){

    if (button != buttonView ) button.setChecked(false);
  }

}

 @Override
public View getView(int position, View convertView, ViewGroup parent) {
  RadioButton rbSelect = (RadioButton) convertView
            .findViewById(R.id.radio1);
  if(selectedIndex == position){
  rbSelect.setChecked(true);
  }
  else{
  rbSelect.setChecked(false);
  }
}

  @Override
  public void onClick(View v) {
    for (int i = 0; i < radios.length; ++i) {
      if (v.equals(radios[i])) {
        selectItem(i);
      } else {
        radios[i].setChecked(false);
      }
    }
  }
};

  public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    if (isChecked) {
      mAccountSignatureLayout.setVisibility(View.VISIBLE);
      mAccountSignature.setText(mAccount.getSignature());
      boolean isSignatureBeforeQuotedText = mAccount.isSignatureBeforeQuotedText();
      mAccountSignatureBeforeLocation.setChecked(isSignatureBeforeQuotedText);
      mAccountSignatureAfterLocation.setChecked(!isSignatureBeforeQuotedText);
    } else {
      mAccountSignatureLayout.setVisibility(View.GONE);
    }
  }
});

private void setCheckedStateForView(int viewId, boolean checked) {
  View checkedView = findViewById(viewId);
  if (checkedView != null && checkedView instanceof RadioButton) {
    ((RadioButton) checkedView).setChecked(checked);
  }
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_add_task);
  // Initialize to highest mPriority by default (mPriority = 1)
  ((RadioButton) findViewById(R.id.radButton1)).setChecked(true);
  mPriority = 1;
}

@Test
public void canBeExplicitlyChecked() throws Exception {
 assertFalse(radioButton.isChecked());
 radioButton.setChecked(true);
 assertTrue(radioButton.isChecked());
 radioButton.setChecked(false);
 assertFalse(radioButton.isChecked());
}

@Test
public void shouldInformRadioGroupThatItIsChecked() throws Exception {
 RadioButton radioButton1 = new RadioButton(context);
 radioButton1.setId(99);
 RadioButton radioButton2 = new RadioButton(context);
 radioButton2.setId(100);
 RadioGroup radioGroup = new RadioGroup(context);
 radioGroup.addView(radioButton1);
 radioGroup.addView(radioButton2);
 radioButton1.setChecked(true);
 assertThat(radioGroup.getCheckedRadioButtonId()).isEqualTo(radioButton1.getId());
 radioButton2.setChecked(true);
 assertThat(radioGroup.getCheckedRadioButtonId()).isEqualTo(radioButton2.getId());
}