I have the following radigroup in the xml
<RadioGroup
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|bottom"
android:orientation="horizontal"
android:id="#+id/radiogroup">
</RadioGroup>
and I am checking the number of objects in my json and generate radiobuttons and add them in the radiogroup as follows.
private void createRadioButton(int nImages) {
final RadioButton[] rb = new RadioButton[nImages];
for(int i=0; i<nImages; i++){
rb[i] = new RadioButton(this);
rb[i].setId(i);
radioGroup.addView(rb[i]);
}
}
now I need to know how to know and check selected radio button ?
when I was hardcoded, the following was working,
radioGroup.check(R.id.radioButton0);
but now I am adding radio buttons programmatically, I do not know how to handle
radioGroup.check(??);
If you want to select radio button at a particular position in radiogroup, you can use
radioGroup.check(radioGroup.getChildAt(position).getId());
where position is the position of the radio button in radio group
you set id of radiobutton as index of array in this part of code rb[i].setId(i);
you can use the following code radioGroup.check(i);
Related
Two buttons getting selected in the radio group.
I do not know where I am getting wrong. Please help me out.
final RadioGroup rg=new RadioGroup(Survay_MainActivity.this);
rg.clearCheck();
rg.setId(Integer.valueOf(entry1.getKey()));
Log.v("rg getid", "rg"+rg.getId());
for(int i =0;i<values.size();i++){
// Create Button
final RadioButton btn = new RadioButton(Survay_MainActivity.this);
btn.setId(i);
btn.setTextColor(Color.parseColor("#000000"));
btn.setBackgroundColor(Color.TRANSPARENT);
btn.setGravity(Gravity.LEFT);
btn.setText(values.get(i));
rg.addView(btn);
btn.setLayoutParams(params);
btn.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
JSONObject quesAns = new JSONObject();
String ans=btn.getText().toString().trim();
try {
quesAns.put(String.valueOf(rg.getId()), ans);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
jsonarray.put(quesAns);
Log.v("jsonarray", "jsonarray"+jsonarray);
}
});
}
views.addView(rg);
1) I am creating the RadioGroup out of the loop.
2) Adding radio button to the RadioGroup in the for loop
3) When the loop finishes the RadioGroup is added to the linerlayout.
You just need to change different ids for different radio button.
There may be some id clash in gen file.
Radio button1 : android:id="#+id/one
Radio button2 : android:id="#+id/two"
Radio button3 : android:id="#+id/three"
Hope this would help.
There are some things misplaced these changes you have to make out.
1.Change your OnClickListener by OnCheckChangeListener
2.Clear check your radioGroup after adding all radioButtons and before adding it in LinearLayout.
Your problem comes from the fact that you are setting an id for your items manually
rg.setId(Integer.valueOf(entry1.getKey()));
btn.setId(i);
Android works with id's generated automatically that are different. Setting the id's manually it might happen that you give the same ID to the radio group and the radio button.
I used your code and set the group to ID 3 and radios from 0 to 4.
Needless to say that after I click the button with id 3 it always stays on because the group has the same id.
So, try to remove the id setting part, or, if you insist make sure you always have distinct id's.
I faced the same problem. The cause is the RadioGroup's id is same as one of RadioButtons
the problem is this line. you didn't send where is this code belonged to. when you get out of this scope and come back you will create new RadioGroup. You should have one and only one RadioGroup so the RadioButtons have same RadioGroup and by default one of them will be selected. To this, you can define RadioGroup in an XML and use this to define variable for it RadioGroup rg = (RadioGroup) findViewById(R.id.YOURNAME); or you can define your RadioGroup as Instance variable(Global).
final RadioGroup rg=new RadioGroup(Survay_MainActivity.this);
I'm building the layout at run time, i have to show a radio group with 4 radio buttons for the user , but some times i should show an Edit Field with the radio button so the user can write some thing related to that radio button in the edit box.
I want the edit field to appear beside the radio button ,.
I tried to build the edit field but it keeps showing under the radio group, and if i sepereate one of the buttons in a linear layout with the edit text, it become out of the scope for the radio group.
this is the code for building the radio group
RadioGroup radioGroup = new RadioGroup(context);
radioGroup.setContentDescription(id);
for (int i = 0; i < vector.size(); i++) {
RadioButton radioButton = new RadioButton(context);
radioButton.setTextColor(Color.BLACK);
radioButton.setText("" + vector.get(i).getQ_text());
radioButton.setContentDescription(vector.get(i).getA_id());
radioButton.setTextSize(20);
radioButton.setTextColor(Color.parseColor("#A5462E"));
radioGroup.addView(radioButton);
radioGroup.setPadding(20, 0, 0, 0);
How can i build the edit field at run time to be shown next to the radio button.
My suggestion would be to create the layout for each row of your RadioGroup in a xml file like this:
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<RadioButton
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<EditText
android:id="#+id/edit_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="invisible"/>
</LinearLayout>
And then in your loop you can inflate this layout and do what do you want with it:
final LinearLayout root = (LinearLayout) findViewById(R.id.root);
final RadioGroup radioGroup = new RadioGroup(this);
for (int i = 0; i < 3; i++) {
final LinearLayout item = (LinearLayout) LayoutInflater.from(this).inflate(R.layout.item_radio_button, null);
final RadioButton button = (RadioButton) item.findViewById(R.id.button);
final EditText editText = (EditText) item.findViewById(R.id.edit_text);
button.setText("Test");
// Your condition to show or not the editText
if (i % 2 == 0) {
editText.setVisibility(View.VISIBLE);
}
radioGroup.addView(item);
}
root.addView(radioGroup);
In xml layout I have RadioGroup, Button1, Button2. When user clicks on button1, several radio buttons are programmatically created in RadioGroup (total amount of radio buttons may differ (pocet = count of radio buttons to be created).
final RadioButton[] rb = new RadioButton[pocet];
RadioGroup rg = (RadioGroup) findViewById(R.id.MyRadioGroup);
radiobuttonCount++;
for(int i=0; i<pocet; i++){
rb[i] = new RadioButton(this);
rb[i].setText("Radio Button " + radiobuttonCount);
rb[i].setId(radiobuttonCount+i);
rb[i].setBackgroundResource(R.drawable.button_green);
rg.addView(rb[i]);
}
What I try to do is this: When user selects xy item from RadioGroup, I'll pass selected value to textview and remove all radioButtons.
For deleting purpose I use:
public void onCheckedChanged(RadioGroup rGroup, int checkedId)
{
RadioButton checkedRadioButton = (RadioButton)rGroup.findViewById(checkedId);
boolean isChecked = checkedRadioButton.isChecked();
if (isChecked)
{
RadioGroup rg = (RadioGroup) findViewById(R.id.MyRadioGroup);
for (int i=0; i< rg.getChildCount(); i++){
rg.removeViewAt(i);
}
}
Problem is that this sometimes works well, but sometimes first radio button remains undeleted.
P.S.
Later I want to add button2 that will feed radiogroup with different items and different radio buttons amount. That's why I need to remove all radio buttons after user does selection.
Its really easy, you just do this:
rg.removeAllViews();
because i worked with the for loop but it didn't remove all the RadioButtons.
have fun :)
My first guess is that this portion of code is bad:
for (int i=0; i< rg.getChildCount(); i++){
rg.removeViewAt(i);
}
you can't run over one view's children while removing child at the same time
(rg.getChildCount() will change during the run)
I am creating a quiz application in android.For each question I have set up 4 radio buttons for the user to click. How do i change the text of the radiobutton dynamically for each question? The text for these radio button are stored in a raw text file.
Here you go.
I have set up 4 radio buttons for the user to click.
You must have defined them in radioGroup,right?
Then you can iterate in RadioGroup to set names to RadioButton
or you can get RadioButton by index and set name to it.
RadioGroup radioGroup = (RadioGroup)findViewById(R.id.group);
for (int i = 0; i < radioGroup .getChildCount(); i++) {
((RadioButton) radioGroup.getChildAt(i)).setText(String.valueOf(i));
}
You can get an object of the button by using
RadioButton button = (RadioButton)findViewById(R.id.yourButtonId);
Then write:
button.setText("This is another text...");
Didn't try to run it, but it should work...
I am using RadioGroup, added RadioButton rdbut to RadioGroup rdgrp like rdgrp.addView(rdbut).
for(int j=0;j<3;j++)
{
RadioGroup rdgrp = new RadioGroup;
for(int i=0;i<=10;i++)
{
RadioButton rdbut = new RadioButton(this);
rdbut.setText("RadioButtion"+i);
rdbut.setId(i);
rdbut.setTag("somename");
rdgrp.addView(rdbut);
}
}
the above code shows how I initialize the radiogroup and radio button. after I run the this code, in emulator/mobile , i am able to check 2 radio buttons at a time.
What could be the problem?
Change your code like this.
RadioGroup rdgrp[] = new RadioGroup[3];
For(int j=0;j<3;j++)
{
RadioButton rdbut[] = new RadioButton[10];
For(int i=0;i<=10;i++)
{
rdbut[i].setText("RadioButtion"+i);
rdbut[i].setId(j*100+i);
rdbut[i].setTag("somename");
rdgrp[j].addView(rdbut[i]);
}
}
You have created three different Radio Group. You can select only one radio button from a single group.So from three groups you can select three buttons But there is no inter-group relationship. You can select radio buttons from different group simultaneously. In your case you can select three buttons at max.
Thanks
Sunil
Use Some thing like this xml design in user layout file.
<TableLayout
android:id="#+id/tbl_layoutchoice"
style="#style/InfoTableView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="3dip" >
<RadioGroup
android:id="#+id/SelectLayout_Group"
android:layout_width="fill_parent"
android:layout_height="wrap_content" >
</RadioGroup>
</TableLayout>
and For Use this RadioGroup in Activity 's OnCreate() Method and findView like this
mRadioGroup = (RadioGroup) this.findViewById(R.id.SelectLayout_Group);
and Then Use Below Code With Your Require Change To Add Radio Button in One RadioGroup.Use Also Below Require Declaration for Create Radio Button Dynamically.
ArrayList<String> layoutlist = new ArrayList<String>(3);
int index = -1;
LayoutParams lp = new LayoutParams(LayoutParams.FILL_PARENT,
LayoutParams.WRAP_CONTENT);
for (String layout : layoutlist) {
RadioButton r = new RadioButton(this);
index++;
r.setText(layout);
r.setId(index);
r.setLayoutParams(lp);
r.setTextAppearance(this, R.style.TextBase);
mRadioGroup.addView(r);
}
So don't forget to add your String Value in layoutlist before for loop .and R.style is some Require Style for Text Show in RadioButton.