How to add radio button dynamically as per the given number of counts?
Solution 1
Please find below the code, I have created an 'EditText' and a 'Button' in the xml layout. Input a number in the 'EditText' and click the Button , The same no. of radio buttons will be added in the Layout.
This is your ActivityMain
public class ActivityMain extends AppCompatActivity implements View.OnClickListener {
EditText mEtNumOfRadioBtns;
Button mBtnAdd;
String TAG = "TestActivity";
RadioGroup mRgAllButtons;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//
mEtNumOfRadioBtns = findViewById(R.id.et_no);
mBtnAdd = findViewById(R.id.btn);
mRgAllButtons = findViewById(R.id.radiogroup);
//
mBtnAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int number = Integer.parseInt(mEtNumOfRadioBtns.getText().toString().trim());
addRadioButtons(number);
}
});
}
public void addRadioButtons(int number) {
mRgAllButtons.setOrientation(LinearLayout.HORIZONTAL);
//
for (int i = 1; i <= number; i++) {
RadioButton rdbtn = new RadioButton(this);
rdbtn.setId(View.generateViewId());
rdbtn.setText("Radio " + rdbtn.getId());
rdbtn.setOnClickListener(this);
mRgAllButtons.addView(rdbtn);
}
}
@Override
public void onClick(View v) {
Log.d(TAG, " Name " + ((RadioButton)v).getText() +" Id is "+v.getId());
}
}
And here is your layout file with name 'activity_main'
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 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"
tools:context=".MainActivity" >
<RadioGroup
android:id="@+id/radiogroup"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:orientation="vertical" />
<LinearLayout
android:layout_marginTop="20dp"
android:layout_marginLeft="20dp"
android:layout_height="wrap_content"
android:layout_width="match_parent">
<EditText android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:hint="Enter no."
android:inputType="number"
android:id="@+id/et_no"/>
<Button
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:text="Add Radio btn"
android:id="@+id/btn"/>
</LinearLayout>
</RelativeLayout>
Solution 2
Try something like below:
RadioGroup rgp= (RadioGroup) findViewById(R.id.radiogroup);
RadioGroup.LayoutParams rprms;
for(int i=0;i<3;i++){
RadioButton radioButton = new RadioButton(this);
radioButton.setText("new"+i);
radioButton.setId(View.generateViewId());
rprms= new RadioGroup.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
rgp.addView(radioButton, rprms);
}
Solution 3
This is the way to do this:
RadioGroup rgp = (RadioGroup) findViewById(R.id.radio_group);
int buttons = 5;
for (int i = 1; i <= buttons ; i++) {
RadioButton rbn = new RadioButton(this);
rbn.setId(View.generateViewId());
rbn.setText("RadioButton" + i);
rgp.addView(rbn);
}
But what if you need to do this horizontally, just add the orientation (the default value is vertical) with setOrientation()
method:
RadioGroup rgp = (RadioGroup) findViewById(R.id.radio_group);
rgp.setOrientation(LinearLayout.HORIZONTAL);
int buttons = 5;
for (int i = 1; i <= buttons; i++) {
RadioButton rbn = new RadioButton(this);
rbn.setId(View.generateViewId());
rbn.setText("RadioButton" + i);
rbn.setLayoutParams(params);
rgp.addView(rbn);
}
This is the complete code:
first of all defining inside our Layout the RadioGroup:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin">
<RadioGroup
android:id="@+id/radio_group"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
</RelativeLayout>
The code into the MainActivity:
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
//Defining 5 buttons.
int buttons = 5;
AppCompatRadioButton[] rb = new AppCompatRadioButton[buttons];
RadioGroup rgp = (RadioGroup) findViewById(R.id.radio_group);
rgp.setOrientation(LinearLayout.HORIZONTAL);
for (int i = 1; i <= buttons; i++) {
RadioButton rbn = new RadioButton(this);
rbn.setId(View.generateViewId());
rbn.setText("RadioButton" + i);
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT, 1f);
rbn.setLayoutParams(params);
rgp.addView(rbn);
}
}
}
Solution 4
Add a Button
and EditText
in xml and take input from editText to variable inputValue
and try this,
public class MyActivity extends Activity {
/**
* Called when the activity is first created.
*/
LinearLayout ll=null;
ViewGroup vwgroup;
Button btnClick;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
vwgroup=((ViewGroup)findViewById(R.id.radiogroup)
btnClick=(Button)findViewById(R.id.button1);
btnClick.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
if(ll!=null)
viewgroup.removeView(ll);
ll = new LinearLayout(this);
for(int i = 1; i < inputValue; i++) {
RadioButton rdbtn = new RadioButton(this);
rdbtn.setId(View.generateViewId());
rdbtn.setText("Radio " + rdbtn.getId());
ll.addView(rdbtn);
}
vwgroup.addView(ll);
}
});
}
}
Comments
-
Dinesh Kumar over 3 years
I have tried this code..It will display three radio buttons in a single row when the emulator starts. But I need a button event for this. i.e; if I click the button, it should ask for number of radio buttons. then If I give the count, it must display the radio buttons based on the count given. For example, If I give the count as 3, it must display the three radio buttons in a single row. Your help is highly appreciated. Thanks in advance.
public class MyActivity extends Activity { /** * Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); for(int row=0; row < 1; row++) { LinearLayout ll = new LinearLayout(this); ll.setOrientation(LinearLayout.HORIZONTAL); for(int i = 1; i < 4; i++) { RadioButton rdbtn = new RadioButton(this); rdbtn.setId((row * 2) + i); rdbtn.setText("Radio " + rdbtn.getId()); ll.addView(rdbtn); } ((ViewGroup)findViewById(R.id.radiogroup)).addView(ll); } } }
this is xml
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout 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" tools:context=".MainActivity" > <RadioGroup android:id="@+id/radiogroup" android:orientation="vertical" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true"/> </RelativeLayout>
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syr almost 9 yearsJust in case someone stumbles upon the same problem: I tried this solution, however with the shown hierarchy (radiogroup->linearlayout->radiobutton) I didn't get the checked radiobutton by: ((RadioGroup)findViewById(R.id.radiogroup)).getCheckedRadioButtonId(); I needed to switch the linearlayout so that the radiobutton is direclty added to the radiogroup like (linearlayout->radiogroup->radiobutton).
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Mohammad Zekrallah over 8 yearsthis works fine but allows for multiple radio buttons to be checked in the same time ! to prevent this, just don't add the radio buttons to the linear layout, add directly to the radio button's group.
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Ninja Coding over 8 years@MohammadZekrallah, you right, this allow multi-select, radio supposed to be "single" select. thank you man. Answer should be updated.
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Ayush Pateria about 8 yearsWon't this create a RadioGroup inside a RadioGroup?
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Goke Obasa over 7 yearsThanks for this. One thing to note is that the id has to be unique, this was the issue I was having.
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Jorgesys over 7 yearsyes of course with (1 + 1000) the id is a consecutive number defined for the id : rbn.setId(1 + 1000);
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Karan Thakkar almost 7 yearsI want to map the buttons horizontally but the above solution doesn't seem to work for me. It works if I want to map it vertically but not horizontally. Any help?
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Gowthaman M over 6 years@Riser How to get text from the selected radio button please help me
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nikeru8 over 6 yearshow to add Click event for each radioButton ?
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nikeru8 over 6 yearsHow to get Click event for each RadioButton?
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William almost 6 yearsThis is by far the easiest way for me
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Adarsh Vijayan P almost 6 years@nikeru8 set click event for button:
// get selected radio button from radioGroup int selectedId = radioSexGroup.getCheckedRadioButtonId(); // find the radiobutton by returned id **radioSexButton** = (RadioButton) findViewById( **selectedId** ); **radioSexButton**.setOnClick...... Toast.makeText(MyAndroidAppActivity.this, _radioSexButton.getText()_, Toast.LENGTH_SHORT).show();
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Gayathri over 5 yearsmy question is, how to set (setChecked = true) only for RadioButton3. - Jorgesys
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Freek de Bruijn over 5 yearsFor API level 17+, you can call View.generateViewId() -- from stackoverflow.com/a/35551268/1694043
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Freek de Bruijn over 5 yearsFor API level 17+, you can call View.generateViewId() -- from stackoverflow.com/a/35551268/1694043
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Freek de Bruijn over 5 yearsFor API level 17+, you can call View.generateViewId() -- from stackoverflow.com/a/35551268/1694043
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Freek de Bruijn over 5 yearsFor API level 17+, you can call View.generateViewId() -- from stackoverflow.com/a/35551268/1694043
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Jitender Dev over 4 yearsI have added click events for radio buttons.
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Mohammed Deifallah almost 4 years@GowthamanM I hope this question is useful for your case.