How to get data from dynamically created Views android

In this blog,
I will show, how to create the dynamic views and get the data accordingly.

In this example, I am creating some UI elements on the screen at run time. Creating text view, RadioGroup, CheckBox and Spinner dynamically by dummy JSON data and creating the on click listener for button. After clicking on the button I will get the data from each created views and show it.

How to Implement

In this example, I have dynamically created four Types of Views

String viewTypes[] = {"R", "S", "C", "T"};

1	String viewTypes[] = {"R", "S", "C", "T"};

R stands RadioGroup
S stands Spinner
C stands Checkbox
T stands TextView

In this example, I have created above view by dummy JSON Data.

I am using option_name as a Heading

JSONObject eachData = customOptnList.getJSONObject(noOfCustomOpt);
customOptionsName.setText(eachData.getString("option_name"));
viewProductLayout.addView(customOptionsName);

JSONObject eachData = customOptnList.getJSONObject(noOfCustomOpt);

customOptionsName.setText(eachData.getString("option_name"));

viewProductLayout.addView(customOptionsName);

and variant_name as a sub data

 if (eachData.getString("option_type").equals("S")) {

                    final JSONArray dropDownJSONOpt = eachData.getJSONArray("variants");
                    ArrayList<String> SpinnerOptions = new ArrayList<String>();
                    for (int j = 0; j < dropDownJSONOpt.length(); j++) {
                        String optionString = dropDownJSONOpt.getJSONObject(j).getString("variant_name");
                        SpinnerOptions.add(optionString);
                    }

                    ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(MainActivity.this, R.layout.spiner_row, SpinnerOptions);
                    Spinner spinner = new Spinner(MainActivity.this);
                    allViewInstance.add(spinner);
                    spinner.setAdapter(spinnerArrayAdapter);
                    spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                        @Override
                        public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
                            try {
                                String variant_name = dropDownJSONOpt.getJSONObject(position).getString("variant_name");
                                Toast.makeText(getApplicationContext(), variant_name + "", Toast.LENGTH_LONG).show();
                            } catch (JSONException e) {
                                e.printStackTrace();
                            }
                        }

                        @Override
                        public void onNothingSelected(AdapterView<?> parentView) {
                        }

                    });
                    viewProductLayout.addView(spinner);
                }

if (eachData.getString("option_type").equals("S")) {

final JSONArray dropDownJSONOpt = eachData.getJSONArray("variants");

ArrayList<String> SpinnerOptions = new ArrayList<String>();

for (int j = 0; j < dropDownJSONOpt.length(); j++) {

String optionString = dropDownJSONOpt.getJSONObject(j).getString("variant_name");

SpinnerOptions.add(optionString);

}

ArrayAdapter<String> spinnerArrayAdapter = new ArrayAdapter<String>(MainActivity.this, R.layout.spiner_row, SpinnerOptions);

Spinner spinner = new Spinner(MainActivity.this);

allViewInstance.add(spinner);

spinner.setAdapter(spinnerArrayAdapter);

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

@Override

public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {

try {

String variant_name = dropDownJSONOpt.getJSONObject(position).getString("variant_name");

Toast.makeText(getApplicationContext(), variant_name + "", Toast.LENGTH_LONG).show();

} catch (JSONException e) {

e.printStackTrace();

}

@Override

public void onNothingSelected(AdapterView<?> parentView) {

}

});

viewProductLayout.addView(spinner);

}

option_type specifies the Type of the Views which is gotten from the JSON dummy data.

And I have used an ArrayList for storing the instance of the views.

List<View> allViewInstance = new ArrayList<View>();

1	List<View> allViewInstance = new ArrayList<View>();

and store the current view

 allViewInstance.add(rg);

1	allViewInstance.add(rg);

For getting the data

After the views have created, We have to get the data which is selected in the views.

Then first we have to get the instance of current view

Spinner spinner = (Spinner) allViewInstance.get(noOfViews);

1	Spinner spinner = (Spinner) allViewInstance.get(noOfViews);

and then by below code you can get the data from spinner

if (eachData.getString("option_type").equals("S")) {
                    Spinner spinner = (Spinner) allViewInstance.get(noOfViews);

                    JSONArray dropDownJSONOpt = eachData.getJSONArray("variants");
                    String variant_name = dropDownJSONOpt.getJSONObject(spinner.getSelectedItemPosition()).getString("variant_name");
                    Log.d("variant_name", variant_name + "");
                    optionsObj.put(eachData.getString("option_name"),
                            "" + variant_name);
                }

if (eachData.getString("option_type").equals("S")) {

Spinner spinner = (Spinner) allViewInstance.get(noOfViews);

JSONArray dropDownJSONOpt = eachData.getJSONArray("variants");

String variant_name = dropDownJSONOpt.getJSONObject(spinner.getSelectedItemPosition()).getString("variant_name");

Log.d("variant_name", variant_name + "");

optionsObj.put(eachData.getString("option_name"),

"" + variant_name);

}

Here I get the variant name of the spinner view but we can get anything which we want to get from views.

Screen-Shots:

Get the Complete Source Code

MainActivity.java

package testapplication.webkul.amangupta.myapplicationtest2;

import android.graphics.Color;
import android.os.Bundle;
import android.support.design.widget.TextInputLayout;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.view.inputmethod.InputMethodManager;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.CheckBox;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Spinner;
import android.widget.TextView;
import android.widget.Toast;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

//    R stands RadioGroup
//    S stands Spinner
//    C stands Checkbox
//    T stands TextView

//    String viewTypes[] = {"R", "S", "C", "T"};
    List<View> allViewInstance = new ArrayList<View>();
    JSONObject jsonObject = new JSONObject();
    private JSONObject optionsObj;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        LinearLayout viewProductLayout = (LinearLayout) findViewById(R.id.customOptionLL);

        try {
            jsonObject = new JSONObject(DummyData.dummyData);
            JSONArray customOptnList = jsonObject.getJSONArray("product_options");

            for (int noOfCustomOpt = 0; noOfCustomOpt < customOptnList.length(); noOfCustomOpt++) {

                JSONObject eachData = customOptnList.getJSONObject(noOfCustomOpt);
                TextView customOptionsName = new TextView(MainActivity.this);
                customOptionsName.setTextSize(18);
                customOptionsName.setPadding(0, 15, 0, 15);
                customOptionsName.setText(eachData.getString("option_name"));
                viewProductLayout.addView(customOptionsName);

                if (eachData.getString("option_type").equals("S")) {

                    final JSONArray dropDownJSONOpt = eachData.getJSONArray("variants");
                    ArrayList<String> SpinnerOptions = new ArrayList<String>();
                    for (int j = 0; j < dropDownJSONOpt.length(); j++) {
                        String optionString = dropDownJSONOpt.getJSONObject(j).getString("variant_name");
                        SpinnerOptions.add(optionString);
                    }

                    ArrayAdapter<String> spinnerArrayAdapter = null;
                    spinnerArrayAdapter = new ArrayAdapter<String>(MainActivity.this, R.layout.spiner_row, SpinnerOptions);
                    Spinner spinner = new Spinner(MainActivity.this);
                    allViewInstance.add(spinner);
                    spinner.setAdapter(spinnerArrayAdapter);
                    spinner.setSelection(0, false);
                    spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
                        @Override
                        public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {
                            try {
                                String variant_name = dropDownJSONOpt.getJSONObject(position).getString("variant_name");
                                Toast.makeText(getApplicationContext(), variant_name + "", Toast.LENGTH_LONG).show();
                            } catch (JSONException e) {
                                e.printStackTrace();
                            }
                        }

                        @Override
                        public void onNothingSelected(AdapterView<?> parentView) {
                        }

                    });
                    viewProductLayout.addView(spinner);
                }

//                    /***************************Radio*****************************************************/

                if (eachData.getString("option_type").equals("R")) {
                    LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
                    params.topMargin = 3;
                    params.bottomMargin = 3;

                    final JSONArray radioButtonJSONOpt = eachData.getJSONArray("variants");
                    RadioGroup rg = new RadioGroup(MainActivity.this); //create the RadioGroup
                    allViewInstance.add(rg);
                    for (int j = 0; j < radioButtonJSONOpt.length(); j++) {

                        RadioButton rb = new RadioButton(MainActivity.this);
                        rg.addView(rb, params);
                        if (j == 0)
                            rb.setChecked(true);
                        rb.setLayoutParams(params);
                        rb.setTag(radioButtonJSONOpt.getJSONObject(j).getString("variant_name"));
                        rb.setBackgroundColor(Color.parseColor("#FFFFFF"));
                        String optionString = radioButtonJSONOpt.getJSONObject(j).getString("variant_name");
                        rb.setText(optionString);
                        rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

                            @Override
                            public void onCheckedChanged(RadioGroup group, int checkedId) {

                                View radioButton = group.findViewById(checkedId);
                                String variant_name = radioButton.getTag().toString();
                                Toast.makeText(getApplicationContext(), variant_name + "", Toast.LENGTH_LONG).show();
                            }
                        });

                    }
                    viewProductLayout.addView(rg, params);
                }

//                    /***********************************CheckBox ***********************************************/


                if (eachData.getString("option_type").equals("C")) {


                    JSONArray checkBoxJSONOpt = eachData.getJSONArray("variants");

                    for (int j = 0; j < checkBoxJSONOpt.length(); j++) {

                        if (!(checkBoxJSONOpt.getJSONObject(j).getString("variant_name").equalsIgnoreCase("NO"))) {
                            CheckBox chk = new CheckBox(MainActivity.this);
                            chk.setBackgroundColor(Color.parseColor("#FFFFFF"));
                            allViewInstance.add(chk);
                            chk.setTag(checkBoxJSONOpt.getJSONObject(j).getString("variant_name"));
                            LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
                            params.topMargin = 3;
                            params.bottomMargin = 3;
                            String optionString = checkBoxJSONOpt.getJSONObject(j).getString("variant_name");
                            chk.setOnClickListener(new View.OnClickListener() {

                                @Override
                                public void onClick(View v) {
                                    String variant_name = v.getTag().toString();
                                    Toast.makeText(getApplicationContext(), variant_name + "", Toast.LENGTH_LONG).show();
                                }
                            });
                            chk.setText(optionString);
                            viewProductLayout.addView(chk, params);
                        }
                    }
                }
                if (eachData.getString("option_type").equals("T")) {
                    TextInputLayout til = new TextInputLayout(MainActivity.this);
                    til.setHint(getString(R.string.hint));
                    EditText et = new EditText(MainActivity.this);
                    til.addView(et);
                    allViewInstance.add(et);
                    viewProductLayout.addView(til);
                }
            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

    public void getDataFromDynamicViews(View v) {
        try {
            JSONArray customOptnList = jsonObject.getJSONArray("product_options");
            optionsObj = new JSONObject();
            for (int noOfViews = 0; noOfViews < customOptnList.length(); noOfViews++) {
                JSONObject eachData = customOptnList.getJSONObject(noOfViews);

                if (eachData.getString("option_type").equals("S")) {
                    Spinner spinner = (Spinner) allViewInstance.get(noOfViews);

                    JSONArray dropDownJSONOpt = eachData.getJSONArray("variants");
                    String variant_name = dropDownJSONOpt.getJSONObject(spinner.getSelectedItemPosition()).getString("variant_name");
                    Log.d("variant_name", variant_name + "");
                    optionsObj.put(eachData.getString("option_name"),
                            "" + variant_name);
                }

                if (eachData.getString("option_type").equals("R")) {
                    RadioGroup radioGroup = (RadioGroup) allViewInstance.get(noOfViews);
                    RadioButton selectedRadioBtn = (RadioButton) findViewById(radioGroup.getCheckedRadioButtonId());
                    Log.d("variant_name", selectedRadioBtn.getTag().toString() + "");
                    optionsObj.put(eachData.getString("option_name"),
                            "" + selectedRadioBtn.getTag().toString());
                }

                if (eachData.getString("option_type").equals("C")) {
                    CheckBox tempChkBox = (CheckBox) allViewInstance.get(noOfViews);
                    if (tempChkBox.isChecked()) {
                        optionsObj.put(eachData.getString("option_name"), tempChkBox.getTag().toString());
                    }
                    Log.d("variant_name", tempChkBox.getTag().toString() + "");
                }
                if (eachData.getString("option_type").equals("T")) {
                    TextView textView = (TextView) allViewInstance.get(noOfViews);
                    if (!textView.getText().toString().equalsIgnoreCase(""))
                        optionsObj.put(eachData.getString("option_name"), textView.getText().toString());
                    else
                        optionsObj.put(eachData.getString("option_name"), textView.getText().toString());
                    Log.d("variant_name", textView.getText().toString() + "");
                }
            }

            String outputData = (optionsObj + "").replace(",", "\n");
            outputData = outputData.replaceAll("[{}]","");
            ((TextView) findViewById(R.id.showData)).setText(outputData);
            Log.d("optionsObj", optionsObj + "");
            hideSoftKeyboard(findViewById(R.id.layout));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void hideSoftKeyboard(View v) {
        if (getCurrentFocus() != null) {
            InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);
            inputMethodManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);
        }
    }

}

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package testapplication.webkul.amangupta.myapplicationtest2;

import android.graphics.Color;

import android.os.Bundle;

import android.support.design.widget.TextInputLayout;

import android.support.v7.app.AppCompatActivity;

import android.util.Log;

import android.view.View;

import android.view.ViewGroup;

import android.view.inputmethod.InputMethodManager;

import android.widget.AdapterView;

import android.widget.ArrayAdapter;

import android.widget.CheckBox;

import android.widget.EditText;

import android.widget.LinearLayout;

import android.widget.RadioButton;

import android.widget.RadioGroup;

import android.widget.Spinner;

import android.widget.TextView;

import android.widget.Toast;

import org.json.JSONArray;

import org.json.JSONException;

import org.json.JSONObject;

import java.util.ArrayList;

import java.util.List;

public class MainActivity extends AppCompatActivity {

// R stands RadioGroup

// S stands Spinner

// C stands Checkbox

// T stands TextView

// String viewTypes[] = {"R", "S", "C", "T"};

List<View> allViewInstance = new ArrayList<View>();

JSONObject jsonObject = new JSONObject();

private JSONObject optionsObj;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

LinearLayout viewProductLayout = (LinearLayout) findViewById(R.id.customOptionLL);

try {

jsonObject = new JSONObject(DummyData.dummyData);

JSONArray customOptnList = jsonObject.getJSONArray("product_options");

for (int noOfCustomOpt = 0; noOfCustomOpt < customOptnList.length(); noOfCustomOpt++) {

JSONObject eachData = customOptnList.getJSONObject(noOfCustomOpt);

TextView customOptionsName = new TextView(MainActivity.this);

customOptionsName.setTextSize(18);

customOptionsName.setPadding(0, 15, 0, 15);

customOptionsName.setText(eachData.getString("option_name"));

viewProductLayout.addView(customOptionsName);

if (eachData.getString("option_type").equals("S")) {

final JSONArray dropDownJSONOpt = eachData.getJSONArray("variants");

ArrayList<String> SpinnerOptions = new ArrayList<String>();

for (int j = 0; j < dropDownJSONOpt.length(); j++) {

String optionString = dropDownJSONOpt.getJSONObject(j).getString("variant_name");

SpinnerOptions.add(optionString);

}

ArrayAdapter<String> spinnerArrayAdapter = null;

spinnerArrayAdapter = new ArrayAdapter<String>(MainActivity.this, R.layout.spiner_row, SpinnerOptions);

Spinner spinner = new Spinner(MainActivity.this);

allViewInstance.add(spinner);

spinner.setAdapter(spinnerArrayAdapter);

spinner.setSelection(0, false);

spinner.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {

@Override

public void onItemSelected(AdapterView<?> parentView, View selectedItemView, int position, long id) {

try {

String variant_name = dropDownJSONOpt.getJSONObject(position).getString("variant_name");

Toast.makeText(getApplicationContext(), variant_name + "", Toast.LENGTH_LONG).show();

} catch (JSONException e) {

e.printStackTrace();

}

@Override

public void onNothingSelected(AdapterView<?> parentView) {

}

});

viewProductLayout.addView(spinner);

}

// /***************************Radio*****************************************************/

if (eachData.getString("option_type").equals("R")) {

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);

params.topMargin = 3;

params.bottomMargin = 3;

final JSONArray radioButtonJSONOpt = eachData.getJSONArray("variants");

RadioGroup rg = new RadioGroup(MainActivity.this); //create the RadioGroup

allViewInstance.add(rg);

for (int j = 0; j < radioButtonJSONOpt.length(); j++) {

RadioButton rb = new RadioButton(MainActivity.this);

rg.addView(rb, params);

if (j == 0)

rb.setChecked(true);

rb.setLayoutParams(params);

rb.setTag(radioButtonJSONOpt.getJSONObject(j).getString("variant_name"));

rb.setBackgroundColor(Color.parseColor("#FFFFFF"));

String optionString = radioButtonJSONOpt.getJSONObject(j).getString("variant_name");

rb.setText(optionString);

rg.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

@Override

public void onCheckedChanged(RadioGroup group, int checkedId) {

View radioButton = group.findViewById(checkedId);

String variant_name = radioButton.getTag().toString();

Toast.makeText(getApplicationContext(), variant_name + "", Toast.LENGTH_LONG).show();

}

});

}

viewProductLayout.addView(rg, params);

}

// /***********************************CheckBox ***********************************************/

if (eachData.getString("option_type").equals("C")) {

JSONArray checkBoxJSONOpt = eachData.getJSONArray("variants");

for (int j = 0; j < checkBoxJSONOpt.length(); j++) {

if (!(checkBoxJSONOpt.getJSONObject(j).getString("variant_name").equalsIgnoreCase("NO"))) {

CheckBox chk = new CheckBox(MainActivity.this);

chk.setBackgroundColor(Color.parseColor("#FFFFFF"));

allViewInstance.add(chk);

chk.setTag(checkBoxJSONOpt.getJSONObject(j).getString("variant_name"));

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);

params.topMargin = 3;

params.bottomMargin = 3;

String optionString = checkBoxJSONOpt.getJSONObject(j).getString("variant_name");

chk.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

String variant_name = v.getTag().toString();

Toast.makeText(getApplicationContext(), variant_name + "", Toast.LENGTH_LONG).show();

}

});

chk.setText(optionString);

viewProductLayout.addView(chk, params);

}

if (eachData.getString("option_type").equals("T")) {

TextInputLayout til = new TextInputLayout(MainActivity.this);

til.setHint(getString(R.string.hint));

EditText et = new EditText(MainActivity.this);

til.addView(et);

allViewInstance.add(et);

viewProductLayout.addView(til);

}

} catch (JSONException e) {

e.printStackTrace();

}

public void getDataFromDynamicViews(View v) {

try {

JSONArray customOptnList = jsonObject.getJSONArray("product_options");

optionsObj = new JSONObject();

for (int noOfViews = 0; noOfViews < customOptnList.length(); noOfViews++) {

JSONObject eachData = customOptnList.getJSONObject(noOfViews);

if (eachData.getString("option_type").equals("S")) {

Spinner spinner = (Spinner) allViewInstance.get(noOfViews);

JSONArray dropDownJSONOpt = eachData.getJSONArray("variants");

String variant_name = dropDownJSONOpt.getJSONObject(spinner.getSelectedItemPosition()).getString("variant_name");

Log.d("variant_name", variant_name + "");

optionsObj.put(eachData.getString("option_name"),

"" + variant_name);

}

if (eachData.getString("option_type").equals("R")) {

RadioGroup radioGroup = (RadioGroup) allViewInstance.get(noOfViews);

RadioButton selectedRadioBtn = (RadioButton) findViewById(radioGroup.getCheckedRadioButtonId());

Log.d("variant_name", selectedRadioBtn.getTag().toString() + "");

optionsObj.put(eachData.getString("option_name"),

"" + selectedRadioBtn.getTag().toString());

}

if (eachData.getString("option_type").equals("C")) {

CheckBox tempChkBox = (CheckBox) allViewInstance.get(noOfViews);

if (tempChkBox.isChecked()) {

optionsObj.put(eachData.getString("option_name"), tempChkBox.getTag().toString());

}

Log.d("variant_name", tempChkBox.getTag().toString() + "");

}

if (eachData.getString("option_type").equals("T")) {

TextView textView = (TextView) allViewInstance.get(noOfViews);

if (!textView.getText().toString().equalsIgnoreCase(""))

optionsObj.put(eachData.getString("option_name"), textView.getText().toString());

else

optionsObj.put(eachData.getString("option_name"), textView.getText().toString());

Log.d("variant_name", textView.getText().toString() + "");

}

String outputData = (optionsObj + "").replace(",", "\n");

outputData = outputData.replaceAll("[{}]","");

((TextView) findViewById(R.id.showData)).setText(outputData);

Log.d("optionsObj", optionsObj + "");

hideSoftKeyboard(findViewById(R.id.layout));

} catch (Exception e) {

e.printStackTrace();

}

public void hideSoftKeyboard(View v) {

if (getCurrentFocus() != null) {

InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(INPUT_METHOD_SERVICE);

inputMethodManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), 0);

}

DummyData.java

package testapplication.webkul.amangupta.myapplicationtest2;

/**
 * Created by aman.gupta on 15/3/16.
 */
public class DummyData {
    static String dummyData = "{\n" +
            "    \"product_options\": [\n" +
            "        {\n" +
            "            \"option_type\": \"R\",\n" +
            "            \"value\": 62,\n" +
            "            \"option_name\": \"Accessories\",\n" +
            "            \"variants\": [\n" +
            "                {\n" +
            "                    \"variant_id\": \"62\",\n" +
            "                    \"position\": \"1\",\n" +
            "                    \"variant_name\": \"Ear-phones\",\n" +
            "                    \"formatmodifier\": \"$30.00\"\n" +
            "                },\n" +
            "                {\n" +
            "                    \"variant_id\": \"61\",\n" +
            "                    \"position\": \"2\",\n" +
            "                    \"variant_name\": \"Head-phones\",\n" +
            "                    \"formatmodifier\": \"$10.00\"\n" +
            "                }\n" +
            "            ]\n" +
            "        },\n" +
            "        {\n" +
            "            \"option_type\": \"S\",\n" +
            "            \"value\": 55,\n" +
            "            \"option_name\": \"Color\",\n" +
            "            \"variants\": [\n" +
            "                {\n" +
            "                    \"variant_id\": \"55\",\n" +
            "                    \"variant_name\": \"White\",\n" +
            "                    \"image_pair\": [],\n" +
            "                    \"formatmodifier\": \"$0.00\"\n" +
            "                },\n" +
            "                {\n" +
            "                    \"variant_id\": \"56\",\n" +
            "                    \"variant_name\": \"Black\",\n" +
            "                    \"image_pair\": [],\n" +
            "                    \"formatmodifier\": \"$0.00\"\n" +
            "                },\n" +
            "                {\n" +
            "                    \"variant_id\": \"57\",\n" +
            "                    \"variant_name\": \"Blue\",\n" +
            "                    \"image_pair\": [],\n" +
            "                    \"formatmodifier\": \"$0.00\"\n" +
            "                },\n" +
            "                {\n" +
            "                    \"variant_id\": \"58\",\n" +
            "                    \"variant_name\": \"Red\",\n" +
            "                    \"image_pair\": [],\n" +
            "                    \"formatmodifier\": \"$0.00\"\n" +
            "                },\n" +
            "                {\n" +
            "                    \"variant_id\": \"59\",\n" +
            "                    \"variant_name\": \"Green\",\n" +
            "                    \"image_pair\": [],\n" +
            "                    \"formatmodifier\": \"$0.00\"\n" +
            "                },\n" +
            "                {\n" +
            "                    \"variant_id\": \"60\",\n" +
            "                    \"variant_name\": \"Yellow\",\n" +
            "                    \"image_pair\": [],\n" +
            "                    \"formatmodifier\": \"$0.00\"\n" +
            "                }\n" +
            "            ]\n" +
            "        },\n" +
            "        {\n" +
            "            \"option_type\": \"C\",\n" +
            "            \"value\": 54,\n" +
            "            \"option_name\": \"3G Connectivity\",\n" +
            "            \"variants\": [\n" +
            "                {\n" +
            "                    \"variant_id\": \"54\",\n" +
            "                    \"variant_name\": \"NO\",\n" +
            "                    \"image_pair\": [],\n" +
            "                    \"formatmodifier\": \"$0.00\"\n" +
            "                },\n" +
            "                {\n" +
            "                    \"variant_id\": \"53\",\n" +
            "                    \"variant_name\": \"YES\",\n" +
            "                    \"image_pair\": [],\n" +
            "                    \"formatmodifier\": \"$125.00\"\n" +
            "                }\n" +
            "            ]\n" +
            "        },\n" +
            "        {\n" +
            "            \"option_type\": \"S\",\n" +
            "            \"value\": 49,\n" +
            "            \"option_name\": \"Memory capacity\",\n" +
            "            \"variants\": [\n" +
            "                {\n" +
            "                    \"variant_id\": \"49\",\n" +
            "                    \"variant_name\": \"16GB\",\n" +
            "                    \"image_pair\": [],\n" +
            "                    \"formatmodifier\": \"$0.00\"\n" +
            "                },\n" +
            "                {\n" +
            "                    \"variant_id\": \"50\",\n" +
            "                    \"variant_name\": \"32GB\",\n" +
            "                    \"image_pair\": [],\n" +
            "                    \"formatmodifier\": \"$100.00\"\n" +
            "                },\n" +
            "                {\n" +
            "                    \"variant_id\": \"51\",\n" +
            "                    \"variant_name\": \"64GB\",\n" +
            "                    \"image_pair\": [],\n" +
            "                    \"formatmodifier\": \"$200.00\"\n" +
            "                },\n" +
            "                {\n" +
            "                    \"variant_id\": \"52\",\n" +
            "                    \"variant_name\": \"128GB\",\n" +
            "                    \"image_pair\": [],\n" +
            "                    \"formatmodifier\": \"$300.00\"\n" +
            "                }\n" +
            "            ]\n" +
            "        },\n" +
            "        {\n" +
            "            \"option_type\": \"T\",\n" +
            "            \"value\": 42,\n" +
            "            \"option_name\": \"Comment\"\n" +
            "        }\n" +
            "    ]\n" +
            "}";
}

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package testapplication.webkul.amangupta.myapplicationtest2;

/**

* Created by aman.gupta on 15/3/16.

public class DummyData {

static String dummyData = "{\n" +

" \"product_options\": [\n" +

" {\n" +

" \"option_type\": \"R\",\n" +

" \"value\": 62,\n" +

" \"option_name\": \"Accessories\",\n" +

" \"variants\": [\n" +

" {\n" +

" \"variant_id\": \"62\",\n" +

" \"position\": \"1\",\n" +

" \"variant_name\": \"Ear-phones\",\n" +

" \"formatmodifier\": \"$30.00\"\n" +

" },\n" +

" {\n" +

" \"variant_id\": \"61\",\n" +

" \"position\": \"2\",\n" +

" \"variant_name\": \"Head-phones\",\n" +

" \"formatmodifier\": \"$10.00\"\n" +

" }\n" +

" ]\n" +

" },\n" +

" {\n" +

" \"option_type\": \"S\",\n" +

" \"value\": 55,\n" +

" \"option_name\": \"Color\",\n" +

" \"variants\": [\n" +

" {\n" +

" \"variant_id\": \"55\",\n" +

" \"variant_name\": \"White\",\n" +

" \"image_pair\": [],\n" +

" \"formatmodifier\": \"$0.00\"\n" +

" },\n" +

" {\n" +

" \"variant_id\": \"56\",\n" +

" \"variant_name\": \"Black\",\n" +

" \"image_pair\": [],\n" +

" \"formatmodifier\": \"$0.00\"\n" +

" },\n" +

" {\n" +

" \"variant_id\": \"57\",\n" +

" \"variant_name\": \"Blue\",\n" +

" \"image_pair\": [],\n" +

" \"formatmodifier\": \"$0.00\"\n" +

" },\n" +

" {\n" +

" \"variant_id\": \"58\",\n" +

" \"variant_name\": \"Red\",\n" +

" \"image_pair\": [],\n" +

" \"formatmodifier\": \"$0.00\"\n" +

" },\n" +

" {\n" +

" \"variant_id\": \"59\",\n" +

" \"variant_name\": \"Green\",\n" +

" \"image_pair\": [],\n" +

" \"formatmodifier\": \"$0.00\"\n" +

" },\n" +

" {\n" +

" \"variant_id\": \"60\",\n" +

" \"variant_name\": \"Yellow\",\n" +

" \"image_pair\": [],\n" +

" \"formatmodifier\": \"$0.00\"\n" +

" }\n" +

" ]\n" +

" },\n" +

" {\n" +

" \"option_type\": \"C\",\n" +

" \"value\": 54,\n" +

" \"option_name\": \"3G Connectivity\",\n" +

" \"variants\": [\n" +

" {\n" +

" \"variant_id\": \"54\",\n" +

" \"variant_name\": \"NO\",\n" +

" \"image_pair\": [],\n" +

" \"formatmodifier\": \"$0.00\"\n" +

" },\n" +

" {\n" +

" \"variant_id\": \"53\",\n" +

" \"variant_name\": \"YES\",\n" +

" \"image_pair\": [],\n" +

" \"formatmodifier\": \"$125.00\"\n" +

" }\n" +

" ]\n" +

" },\n" +

" {\n" +

" \"option_type\": \"S\",\n" +

" \"value\": 49,\n" +

" \"option_name\": \"Memory capacity\",\n" +

" \"variants\": [\n" +

" {\n" +

" \"variant_id\": \"49\",\n" +

" \"variant_name\": \"16GB\",\n" +

" \"image_pair\": [],\n" +

" \"formatmodifier\": \"$0.00\"\n" +

" },\n" +

" {\n" +

" \"variant_id\": \"50\",\n" +

" \"variant_name\": \"32GB\",\n" +

" \"image_pair\": [],\n" +

" \"formatmodifier\": \"$100.00\"\n" +

" },\n" +

" {\n" +

" \"variant_id\": \"51\",\n" +

" \"variant_name\": \"64GB\",\n" +

" \"image_pair\": [],\n" +

" \"formatmodifier\": \"$200.00\"\n" +

" },\n" +

" {\n" +

" \"variant_id\": \"52\",\n" +

" \"variant_name\": \"128GB\",\n" +

" \"image_pair\": [],\n" +

" \"formatmodifier\": \"$300.00\"\n" +

" }\n" +

" ]\n" +

" },\n" +

" {\n" +

" \"option_type\": \"T\",\n" +

" \"value\": 42,\n" +

" \"option_name\": \"Comment\"\n" +

" }\n" +

" ]\n" +

"}";

}

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <RelativeLayout xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/layout"
        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"
        tools:context=".MainActivity">

        <android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
            xmlns:card_view="http://schemas.android.com/apk/res-auto"
            android:id="@+id/customOptionLLOuter"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginBottom="2dp"
            android:background="#FFFFFF"
            android:padding="5dp"
            card_view:cardCornerRadius="5dp"
            card_view:cardElevation="5dp"
            card_view:cardUseCompatPadding="true">


            <LinearLayout
                android:id="@+id/customOptionLL"
                android:layout_width="fill_parent"
                android:layout_height="wrap_content"
                android:background="#FFFFFF"
                android:orientation="vertical"
                android:padding="5dp"></LinearLayout>
        </android.support.v7.widget.CardView>

        <Button
            android:id="@+id/signup"
            android:layout_width="160dp"
            android:layout_height="wrap_content"
            android:layout_below="@+id/customOptionLLOuter"
            android:layout_centerHorizontal="true"
            android:layout_marginTop="15dp"
            android:background="@color/colorPrimaryDark"
            android:onClick="getDataFromDynamicViews"
            android:padding="10dp"
            android:text="Get Data"
            android:textColor="#FFFFFF"
            android:textStyle="bold" />

        <TextView
            android:id="@+id/text"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/signup"
            android:layout_marginTop="15dp"
            android:text="Output:"
            android:textAppearance="@style/TextAppearance.AppCompat.Medium" />

        <TextView
            android:id="@+id/showData"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_below="@+id/text"
            android:layout_marginTop="15dp"
            android:textAppearance="@style/TextAppearance.AppCompat.Large" />
    </RelativeLayout>
</ScrollView>

<?xml version="1.0" encoding="utf-8"?>

<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

<RelativeLayout xmlns:tools="http://schemas.android.com/tools"

android:id="@+id/layout"

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"

tools:context=".MainActivity">

<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"

xmlns:card_view="http://schemas.android.com/apk/res-auto"

android:id="@+id/customOptionLLOuter"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:layout_marginBottom="2dp"

android:background="#FFFFFF"

android:padding="5dp"

card_view:cardCornerRadius="5dp"

card_view:cardElevation="5dp"

card_view:cardUseCompatPadding="true">

<LinearLayout

android:id="@+id/customOptionLL"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:background="#FFFFFF"

android:orientation="vertical"

android:padding="5dp"></LinearLayout>

</android.support.v7.widget.CardView>

<Button

android:id="@+id/signup"

android:layout_width="160dp"

android:layout_height="wrap_content"

android:layout_below="@+id/customOptionLLOuter"

android:layout_centerHorizontal="true"

android:layout_marginTop="15dp"

android:background="@color/colorPrimaryDark"

android:onClick="getDataFromDynamicViews"

android:padding="10dp"

android:text="Get Data"

android:textColor="#FFFFFF"

android:textStyle="bold" />

<TextView

android:id="@+id/text"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@+id/signup"

android:layout_marginTop="15dp"

android:text="Output:"

android:textAppearance="@style/TextAppearance.AppCompat.Medium" />

<TextView

android:id="@+id/showData"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:layout_below="@+id/text"

android:layout_marginTop="15dp"

android:textAppearance="@style/TextAppearance.AppCompat.Large" />

</RelativeLayout>

</ScrollView>

spiner_row.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/cust_view"
    style="?android:attr/spinnerDropDownItemStyle"
    android:singleLine="true"
    android:text="Hello"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:paddingTop="15dp"
    android:paddingBottom="15dp"
    android:gravity="left|center_vertical"/>

<?xml version="1.0" encoding="utf-8"?>

<TextView xmlns:android="http://schemas.android.com/apk/res/android"

android:id="@+id/cust_view"

style="?android:attr/spinnerDropDownItemStyle"

android:singleLine="true"

android:text="Hello"

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:paddingTop="15dp"

android:paddingBottom="15dp"

android:gravity="left|center_vertical"/>

Aman Gupta

Coder DNA. Like to solve strenuous problems.

22 May, 2023
Updated by - Akshay Singh
22 Dec, 2016
Updated by - Aman Gupta

. . .

15 comments

Shirisha Reddy 7 years ago

hai sir
button click is not woring showing error as
java.lang.ClassCastException: android.widget.Spinner cannot be cast to android.widget.EditText

Aman Gupta 7 years ago
Please share the code which you are using.

Reply
Aman Gupta 6 years ago
Its seems that you have written the code like:
Spinner spinner = (EditText) allViewInstance.get(noOfViews);

Instead, it should be casted properly as:
Spinner spinner = (Spinner) allViewInstance.get(noOfViews);

Reply

Milan Amatya 6 years ago

java.lang.ClassCastException: android.widget.Spinner cannot be cast to android.widget.CheckBox

when another checkbox is added in the json dummy data.

Aman Gupta (Moderator) 6 years ago
Its seems that you have written the code like:
Spinner spinner = (EditText) allViewInstance.get(noOfViews);
Instead, it should be casted properly as:
Spinner spinner = (Spinner) allViewInstance.get(noOfViews);

Reply
- Volkan 2 years ago
  Hi, i have same problem, same error this. When added 1 or more checkbox.
  and my code is
  Spinner spinner = (Spinner) allViewInstance.get(noOfViews);
  but logcat give an error.
  java.lang.ClassCastException: android.widget.Spinner cannot be cast to android.widget.CheckBox
  
  Reply
  - anchit (Moderator) 2 years ago
    
    This is casting exception and this has something to do with your code only.
    
    Please do check the code more aptly.
    
    Reply
  - Dhruv Chauhan 2 years ago
    Did you solved this problem? I am having this error from 2 days but i was focusing on other elements and all work done except this multiple checkboxes classcastexception, please let me know how to solve this. It would be really appreciating for your help, if you can’t reply here, please mail me on [email protected]
    
    Reply
    - anchit (Moderator) 2 years ago
      Hey Dhruv,
      Can you please share the code that you are developing using this blog so that we can check and fix the error that you are facing.
      
      Reply

ankit 5 years ago

not working if having more than 1 checkbox

anchit (Moderator) 5 years ago
Hello Ankit,

Can you please share the stacktrace of the issue you are getting ?

Reply
- cosmas 4 years ago
  Doesn’t work when you add more than one check box
  
  Reply
  - anchit (Moderator) 4 years ago
    please share the stacktrace of the exception you are getting.
    
    Reply

Sandeep 4 years ago

How we can set validations on fields?

anchit (Moderator) 4 years ago
The validation depends on your logic.
The same way you are getting the data, you can put a validation over there.

Or if you want you can collect all the data first and then validate with a similar function.

Reply

How to get data from dynamically created Views android

How to Implement

For getting the data

Screen-Shots:

Get the Complete Source Code

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