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Insert Data Operation

In the upper part, we have created a PHP script for adding data to our SQL table. Along with that we have also tested that script by adding data to it. In this part, we will integrate that in our Android App and add data to our SQL table from our Android app. 

What we are going to build in this article? 

We will be building a simple application in which we will be simply adding course details from a simple form in our SQL table which we have created. For performing this operation we will be using the Volley library which is used for JSON parsing in Android. Below is the video in which we will get to see what we are going to build in this article. 

Step by Step Implementation

Step 1: Create a New Project

To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that select Java as the programming language. 

Step 2: Add the below dependency in your build.gradle file

Below is the dependency for Volley which we will be using to get the data from API. For adding this dependency navigate to the app > Gradle Scripts > build.gradle(app) and add the below dependency in the dependencies section.  

implementation ‘com.android.volley:volley:1.1.1’

After adding this dependency sync your project and now move towards the AndroidManifest.xml part.   

Step 3: Adding permissions to the internet in the AndroidManifest.xml file

Navigate to the app > AndroidManifest.xml and add the below code to it.   

XML




<!--permissions for INTERNET-->
<uses-permission android:name="android.permission.INTERNET"/>
 






                        









									
									
								

								
								

									
									
 
Step 4: Working with the activity_main.xml file

									
									
								

								
								

									
									
Navigate to the app > res > layout > activity_main.xml and add the below code to that file. Below is the code for the activity_main.xml file.  

									
									
								

								
								

									
									




XML















                                    




                                    

                                    




                                    




                                    

                                    

                                    
                                




















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


<LinearLayout


    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"


    android:orientation="vertical"


    tools:context=".MainActivity">


 


    <!--Edit text for getting course Name-->


    <EditText


        android:id="@+id/idEdtCourseName"


        android:layout_width="match_parent"


        android:layout_height="wrap_content"


        android:layout_marginStart="10dp"


        android:layout_marginTop="20dp"


        android:layout_marginEnd="10dp"


        android:hint="Course Name"


        android:importantForAutofill="no"


        android:inputType="text" />


 


    <!--Edittext for getting course Duration-->


    <EditText


        android:id="@+id/idEdtCourseDuration"


        android:layout_width="match_parent"


        android:layout_height="wrap_content"


        android:layout_marginStart="10dp"


        android:layout_marginTop="20dp"


        android:layout_marginEnd="10dp"


        android:hint="Course Duration in min"


        android:importantForAutofill="no"


        android:inputType="time" />


 


    <!--Edittext for getting course Description-->


    <EditText


        android:id="@+id/idEdtCourseDescription"


        android:layout_width="match_parent"


        android:layout_height="wrap_content"


        android:layout_marginStart="10dp"


        android:layout_marginTop="20dp"


        android:layout_marginEnd="10dp"


        android:hint="Course Description"


        android:importantForAutofill="no"


        android:inputType="text" />


 


    <!--Button for adding your course to Firebase-->


    <Button


        android:id="@+id/idBtnSubmitCourse"


        android:layout_width="match_parent"


        android:layout_height="wrap_content"


        android:layout_margin="10dp"


        android:text="Submit Course Details"


        android:textAllCaps="false" />


     


</LinearLayout>



















                        







                        









									
									
								

								
								

									
									
 
Step 5: Working with the MainActivity.java file

									
									
								

								
								

									
									
Go to the MainActivity.java file and refer to the following code. Below is the code for the MainActivity.java file. Comments are added inside the code to understand the code in more detail. 

									
									
								

								
								

									
									




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import android.os.Bundle;


import android.text.TextUtils;


import android.util.Log;


import android.view.View;


import android.widget.Button;


import android.widget.EditText;


import android.widget.Toast;


 


import androidx.appcompat.app.AppCompatActivity;


 


import com.android.volley.Request;


import com.android.volley.RequestQueue;


import com.android.volley.VolleyError;


import com.android.volley.toolbox.StringRequest;


import com.android.volley.toolbox.Volley;


 


import org.json.JSONException;


import org.json.JSONObject;


 


import java.util.HashMap;


import java.util.Map;


 


public class MainActivity extends AppCompatActivity {


     


    // creating variables for our edit text


    private EditText courseNameEdt, courseDurationEdt, courseDescriptionEdt;


    


    // creating variable for button


    private Button submitCourseBtn;


     


    // creating a strings for storing our values from edittext fields.


    private String courseName, courseDuration, courseDescription;


 


    @Override


    protected void onCreate(Bundle savedInstanceState) {


        super.onCreate(savedInstanceState);


        setContentView(R.layout.activity_main);


         


        // initializing our edittext and buttons


        courseNameEdt = findViewById(R.id.idEdtCourseName);


        courseDescriptionEdt = findViewById(R.id.idEdtCourseDescription);


        courseDurationEdt = findViewById(R.id.idEdtCourseDuration);


        submitCourseBtn = findViewById(R.id.idBtnSubmitCourse);


        submitCourseBtn.setOnClickListener(new View.OnClickListener() {


            @Override


            public void onClick(View v) {


                 


                // getting data from edittext fields.


                courseName = courseNameEdt.getText().toString();


                courseDescription = courseDescriptionEdt.getText().toString();


                courseDuration = courseDurationEdt.getText().toString();


 


                // validating the text fields if empty or not.


                if (TextUtils.isEmpty(courseName)) {


                    courseNameEdt.setError("Please enter Course Name");


                } else if (TextUtils.isEmpty(courseDescription)) {


                    courseDescriptionEdt.setError("Please enter Course Description");


                } else if (TextUtils.isEmpty(courseDuration)) {


                    courseDurationEdt.setError("Please enter Course Duration");


                } else {


                    // calling method to add data to Firebase Firestore.


                    addDataToDatabase(courseName, courseDescription, courseDuration);


                }


            }


        });


    }


 


    private void addDataToDatabase(String courseName, String courseDescription, String courseDuration) {


         


        // url to post our data


        String url = "http://localhost/courseApp/addCourses.php";


         


        // creating a new variable for our request queue


        RequestQueue queue = Volley.newRequestQueue(MainActivity.this);


         


        // on below line we are calling a string 


        // request method to post the data to our API


        // in this we are calling a post method.


        StringRequest request = new StringRequest(Request.Method.POST, url, new com.android.volley.Response.Listener<String>() {


            @Override


            public void onResponse(String response) {


                Log.e("TAG", "RESPONSE IS " + response);


                try {


                    JSONObject jsonObject = new JSONObject(response);


                    // on below line we are displaying a success toast message.


                    Toast.makeText(MainActivity.this, jsonObject.getString("message"), Toast.LENGTH_SHORT).show();


                } catch (JSONException e) {


                    e.printStackTrace();


                }


                // and setting data to edit text as empty


                courseNameEdt.setText("");


                courseDescriptionEdt.setText("");


                courseDurationEdt.setText("");


            }


        }, new com.android.volley.Response.ErrorListener() {


            @Override


            public void onErrorResponse(VolleyError error) {


                // method to handle errors.


                Toast.makeText(MainActivity.this, "Fail to get response = " + error, Toast.LENGTH_SHORT).show();


            }


        }) {


            @Override


            public String getBodyContentType() {


                // as we are passing data in the form of url encoded 


                // so we are passing the content type below


                return "application/x-www-form-urlencoded; charset=UTF-8";


            }


 


            @Override


            protected Map<String, String> getParams() {


                 


                // below line we are creating a map for storing


                // our values in key and value pair.


                Map<String, String> params = new HashMap<String, String>();


                 


                // on below line we are passing our


                // key and value pair to our parameters.


                params.put("courseName", courseName);


                params.put("courseDuration", courseDuration);


                params.put("courseDescription", courseDescription);


                 


                // at last we are returning our params.


                return params;


            }


        };


        // below line is to make 


        // a json object request.


        queue.add(request);


    }


}



















                        







                        









									
									
								

								
								

									
									
 
Now run your app and see the output of the code. 

									
									
								

								
								

									
									
Output:  

									
									
								

								
								

									
									

									
									
								

								
								

									
									
You can get to see the data that has been added to your SQL table in the below screenshot.  

									
									
								

								
								

									
									

									
									
								

								
								

									
									
 

									
									
								

								
								

									
									

									
									
								

								
								

									
									

									
									
								

								
								

									
									

									
									
								

								
							

							
							

								
CRUD Operation in MySQL Using PHP, Volley Android – Insert Data

								
								

									
									
It is known that we can use MySQL to use Structure Query Language to store the data in the form of RDBMS. SQL is the most popular language for adding, accessing and managing content in a database. It is most noted for its quick processing, proven reliability, ease, and flexibility of use. The application is used for a wide range of purposes, including data warehousing, e-commerce, and logging applications. MySQL provides a set of some basic but most essential operations that will help you to easily interact with the MySQL database and these operations are known as CRUD operations.

									
									
								

								
								

									
									

									
									
								

								
								

									
									
In the previous article, we have seen creating a new SQL database in the PhpMydmin service. In this article, we will perform the Insert data operation. Before performing this operation first of all we have to create a new PHP script for adding new data to that database in our SQL Database. 

									
									
								

								
								

									
									
Prerequisite: You should be having Postman installed in your system to test this PHP script. 

									
									
								

								
							

						


						
						

							
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