Code to send data to Google Docs sheet from Android activity

ContactActivity.java

package in.codesmith.contactusexample;

import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.ActionBarActivity;
import android.text.TextUtils;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import com.squareup.okhttp.MediaType;
import com.squareup.okhttp.OkHttpClient;
import com.squareup.okhttp.Request;
import com.squareup.okhttp.RequestBody;
import com.squareup.okhttp.Response;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

public class ContactActivity extends ActionBarActivity {

    public static final MediaType FORM_DATA_TYPE
            = MediaType.parse("application/x-www-form-urlencoded; charset=utf-8");
	//URL derived from form URL
	public static final String URL="https://docs.google.com/forms/d/1dcq0Fgt5dSUoIiH119K5-eF-XMGiq3eVPt97Aocspx4/formResponse";
	//input element ids found from the live form page
	public static final String EMAIL_KEY="entry_313227136";
	public static final String SUBJECT_KEY="entry_1834657755";
	public static final String MESSAGE_KEY="entry_1110317093";
	
    private final Context context;
    private EditText emailEditText;
    private EditText subjectEditText;
    private EditText messageEditText;

    @Override
    protected void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_contact);
		
		//save the activity in a context variable to be used afterwards
		context =this;
		
		//Get references to UI elements in the layout
        Button sendButton = (Button)findViewById(R.id.sendButton);
        emailEditText = (EditText)findViewById(R.id.emailEditText);
        subjectEditText = (EditText)findViewById(R.id.subjectEditText);
        messageEditText = (EditText)findViewById(R.id.messageEditText);

		sendButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                //Make sure all the fields are filled with values
				if(TextUtils.isEmpty(emailEditText.getText().toString()) ||
                        TextUtils.isEmpty(subjectEditText.getText().toString()) ||
                        TextUtils.isEmpty(messageEditText.getText().toString()))
                {
                    Toast.makeText(context,"All fields are mandatory.",Toast.LENGTH_LONG).show();
                    return;
                }
				//Check if a valid email is entered
                if(!android.util.Patterns.EMAIL_ADDRESS.matcher(emailEditText.getText().toString()).matches())
                {
                    Toast.makeText(context,"Please enter a valid email.",Toast.LENGTH_LONG).show();
                    return;
                }
				
				//Create an object for PostDataTask AsyncTask
                PostDataTask postDataTask = new PostDataTask();
				
				//execute asynctask
                postDataTask.execute(URL,emailEditText.getText().toString(),
                        subjectEditText.getText().toString(),
                        messageEditText.getText().toString());
            }
        });
    }

	//AsyncTask to send data as a http POST request
    private class PostDataTask extends AsyncTask<String, Void, Boolean> {

        @Override
        protected Boolean doInBackground(String... contactData) {
            Boolean result = true;
            String url = contactData[0];
            String email = contactData[1];
            String subject = contactData[2];
            String message = contactData[3];
            String postBody="";
            
            try {
				//all values must be URL encoded to make sure that special characters like & | ",etc.
				//do not cause problems
                postBody = EMAIL_KEY+"=" + URLEncoder.encode(email,"UTF-8") + 
							"&" + SUBJECT_KEY + "=" + URLEncoder.encode(subject,"UTF-8") + 
							"&" + MESSAGE_KEY + "=" + URLEncoder.encode(message,"UTF-8");
            } catch (UnsupportedEncodingException ex) {
                result=false;
            }
            
            /*
            //If you want to use HttpRequest class from http://stackoverflow.com/a/2253280/1261816
            try {
			HttpRequest httpRequest = new HttpRequest();
			httpRequest.sendPost(url, postBody);
		}catch (Exception exception){
			result = false;
		}
            */
            
            try{
                //Create OkHttpClient for sending request
				OkHttpClient client = new OkHttpClient();
				//Create the request body with the help of Media Type
                RequestBody body = RequestBody.create(FORM_DATA_TYPE, postBody);
                Request request = new Request.Builder()
                        .url(url)
                        .post(body)
                        .build();
				//Send the request
                Response response = client.newCall(request).execute();
            }catch (IOException exception){
                result=false;
            }
            return result;
        }

        @Override
        protected void onPostExecute(Boolean result){
			//Print Success or failure message accordingly
            Toast.makeText(context,result?"Message successfully sent!":"There was some error in sending message. Please try again after some time.",Toast.LENGTH_LONG).show();
        }

    }
}

Great, it has helped me