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RadioGrpHeaderUI.java
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RadioGrpHeaderUI.java
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package com.example.radiogroupwithsectionheaders;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Map;
import android.content.Context;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.ScrollView;
import android.widget.TextView;
public class RadioGrpHeaderUI {
private RadioGroup radioGroup;
LinearLayout.LayoutParams layoutParamsBasic = getLayoutParams();
Context context;
int count = 0;
String selectedCategory;
ScrollView categoryListingLayout;
LinkedHashMap<String, ArrayList<String>> newsCategoryListing;
ArrayList<String> newsArrayList;
public RadioGrpHeaderUI(Context context, ScrollView categoryListingLayout) {
this.context = context;
this.categoryListingLayout = categoryListingLayout;
initializeHashMap();
createTheList();
}
public void initializeHashMap() {
newsCategoryListing = new LinkedHashMap<String, ArrayList<String>>();
ArrayList<String> movies = new ArrayList<String>() {
{
add("Boxoffice");
add("Bright Lights");
add("Cineaste");
add("Close Up");
add("eFilmCritic.com");
add("Empire");
}
};
ArrayList<String> sports = new ArrayList<String>() {
{
add("The Sun");
add("Sky Sports");
add("Daily Star");
}
};
ArrayList<String> technology = new ArrayList<String>() {
{
add("TechCrunch");
add("HackerNews");
add("LinkedIn");
add("YahooNews");
add("NewYorkTimes");
add("Interanational Herald Times");
}
};
newsCategoryListing.put("MOVIES", movies);
newsCategoryListing.put("SPORTS", sports);
newsCategoryListing.put("TECH NEWS", technology);
}
public void createTheList() {
radioGroup = new RadioGroup(context);
radioGroup.setLayoutParams(getLayoutParams());
radioGroup.setOrientation(LinearLayout.VERTICAL);
if (newsCategoryListing.size() > 0) {
Iterator it = newsCategoryListing.entrySet().iterator();
newsArrayList = new ArrayList<String>();
count = count + 1;
while (it.hasNext()) {
Map.Entry pairs = (Map.Entry) it.next();
count = count + 1;
// create field header and its run time UI
String fieldHeader = (String) pairs.getKey();
addFieldHeaderTextView(fieldHeader);
newsArrayList = (ArrayList<String>) pairs.getValue();
int length = newsArrayList.size();
int parentId = count++;
final RadioButton[] radiobutton = new RadioButton[length];
for (int i = 0; i < length; i++) {
final String fieldOption = newsArrayList.get(i);
radiobutton[i] = new RadioButton(context);
radiobutton[i].setText(fieldOption);
radiobutton[i].setPadding(radiobutton[i].getBackground()
.getIntrinsicWidth(), 0, 20, 0);
// /radioGroup.addView(radiobutton[i]);
radioGroup.addView(radiobutton[i]);
if (radioGroup.getCheckedRadioButtonId() == -1) {
radioGroup
.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(
RadioGroup group, int checkedId) {
RadioButton checkedRadioButton = (RadioButton) categoryListingLayout
.findViewById(checkedId);
selectedCategory = checkedRadioButton
.getText().toString();
((MainActivity) context).finish();
}
});
}
}
}
it.remove(); // avoids a ConcurrentModificationException
}
categoryListingLayout.addView(radioGroup);
}
public void addFieldHeaderTextView(String fieldHeader) {
TextView tv = new TextView(context);
tv.setText(fieldHeader);
layoutParamsBasic = getLayoutParams();
tv.setLayoutParams(layoutParamsBasic);
radioGroup.addView(tv);
}
public LinearLayout.LayoutParams getLayoutParams() {
return new LinearLayout.LayoutParams(
ViewGroup.LayoutParams.WRAP_CONTENT,
ViewGroup.LayoutParams.WRAP_CONTENT);
}
}