How to use

getId

method

in

android.widget.RadioButton

  @Override
  public void onClick(View v) {
    RadioButton rb = (RadioButton)v;
    switch (rb.getId()) {
      case R.id.rbtnRussian:
        break;
      case R.id.rbtnEnglish:
        break;
      case R.id.rbtnSpanish:
        break;
      default:
        break;
    }
  }
};

@Override
public void addView(View child, int index, ViewGroup.LayoutParams params) {
  if (child instanceof RadioButton) {
    final RadioButton button = (RadioButton) child;
    if (button.isChecked()) {
      mProtectFromCheckedChange = true;
      if (mCheckedId != -1) {
        setCheckedStateForView(mCheckedId, false);
      }
      mProtectFromCheckedChange = false;
      setCheckedId(button.getId());
    }
  }
  super.addView(child, index, params);
}

@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());
}

public void onClick(View v) {
 RadioButton btn = (RadioButton) v;
 Question question = questionList.get(position);
 question.unselectAll(); // unselects all Answer's  
 question.getAnswer(btn.getId()).setSelected(true);
}

  @Override
  public void onClick(View v) {
    checkButton(buttons, options, button.getId(), activity);
  }
});

  @Override
  public void onClick(View v) {
    checkButton(buttons, options, button.getId(), activity);
  }
});

  @Override
  public void onClick(View v) {
    checkButton(buttons, options, button.getId(), context);
  }
});

  @Override
  public void onClick(View v) {
    checkButton(buttons, options, button.getId(), context);
  }
});

 RadioButton radioLeakTightYes = (RadioButton) findViewById(...);
RadioButton radioLeakTightNo = (RadioButton) findViewById(...);

radioGroupLeakTight.clearCheck();
if(currentTask.isLeakTight()){
  radioGroupLeakTight.check(radioLeakTightYes.getId());
} else {
  radioGroupLeakTight.check(radioLeakTightNo.getId());
}

  @Override
  public void onCheckedChanged(RadioGroup group, int checkedId) {
    if (checkedId == top_rg_a.getId()) main_viewpager.setCurrentItem(0);
    else if (checkedId == top_rg_b.getId()) main_viewpager.setCurrentItem(1);
  }
});

 private void load() { 
SharedPreferences sharedPreferences = getPreferences(Context.MODE_PRIVATE);
for(int i=0;i<radioGroup.getChildCount();i++){
  RadioButton rbtn=(RadioButton)radioGroup.getChildAt(i);
  rbtn.setChecked(sharedPreferences.getBoolean("check"+rbtn.getId(), false)); 
 }
}

@Override
public void onPageSelected(int position) {
  if (position == 0) {
    radioGroup.check(dateButton.getId());
  } else {
    radioGroup.check(timeButton.getId());
  }
}

final ArrayList<RadioButton> mGroup = new ArrayList<RadioButton>();
 CompoundButton.OnCheckedChangeListener mListener = new CompoundButton.OnCheckedChangeListener() 
 {
   public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
   {
     for(RadioButton btn : mGroup) {
       if (buttonView.getId() != btn.getId() && isChecked) {
         btn.setChecked(false);
       }
     }
   }
 };

  @Override
  public void onCheckedChanged(RadioGroup group, int checkedId) {
    for (int i = 0; i < group.getChildCount(); i++) {
      RadioButton child = (RadioButton) group.getChildAt(i);
      child.setChecked(child.getId() == checkedId);
      if (child.getId() == checkedId)
        selectedPreference = (String) child.getTag();
    }
  }
});

@Override
public void onCheckedChanged(RadioGroup radioGroup, int btnId) {
  if (null != itemListener){
    for (int i=0; i<rbList.size(); i++){
      if (rbList.get(i).getId() == btnId){
        itemListener.onItemClick(i);
        break;
      }
    }
  }
  dismiss();
}

  @Override
  public void onCheckedChanged(RadioGroup group, int checkedId) {
    if (checkedId == rb1.getId()) {
      addpsTv.setText(rb1.getText().toString());
      alertDialog.dismiss();
    } else {
      Toast.makeText(getContext(), "not support", Toast.LENGTH_SHORT).show();
    }
  }
});

private void handleSearch() {
  final String inputString = mEditText.getText().toString().trim().replaceAll("\\n", "");
  if (mSearchRadio.getCheckedRadioButtonId() == mSearchName.getId()) {//用户名
    searchName(inputString);
  } else {
    searchId(inputString);
  }
}

private void handleSearch() {
  final String inputString = mEditText.getText().toString();
  if (mSearchRadio.getCheckedRadioButtonId() == mUserTopicButton.getId()) {//用户主题
    searchUserTopic(inputString);
  } else if (mSearchRadio.getCheckedRadioButtonId() == mUserReplyButton.getId()) {//用户回复
    searchUserReply(inputString);
  } else if (mSearchRadio.getCheckedRadioButtonId() == mTopicButton.getId()) {
    searchTopic(inputString);
  } else {
    searchAllTopic(inputString);
  }
}

  @Override
  public void onCheckedChanged(RadioGroup group, int checkedId) {
    for (int i = 0; i < group.getChildCount(); i++) {
      RadioButton rb = (RadioButton) group.getChildAt(i);
      if (rb.getId() == checkedId) {
        type[0] = rb.getText().toString();
      }
    }
  }
});

  @Override
  public void onClick(View v)
  {
    final RadioButton selectedButton = findViewById(radioGroup.getCheckedRadioButtonId());
    if (v instanceof RadioButton && eventHandler != null && selectedButton != null)
    {
      eventHandler.onClick(selectedButton.getId() - radioGroup.getId() - 1);
    }
    closeDialog();
  }
}