Android CRUD Tutorial | • RETROFIT • PHP • MYSQL (https://youtu.be/Vh92eSAEu5c)

activity_editor.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.NestedScrollView 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"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    tools:context=".activity.editor.EditorActivity">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginLeft="16dp"
        android:layout_marginRight="16dp"
        android:layout_marginTop="20dp">

        <EditText
            android:id="@+id/title"
            android:hint="@string/to_do"
            android:textSize="25sp"
            android:inputType="textCapSentences"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            tools:ignore="Autofill" />

        <EditText
            android:id="@+id/note"
            android:layout_below="@id/title"
            android:hint="@string/enter_note"
            android:inputType="textMultiLine"
            android:minLines="6"
            android:gravity="top|start"
            android:layout_marginTop="20dp"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            tools:ignore="Autofill" />

        <com.thebluealliance.spectrum.SpectrumPalette
            android:id="@+id/palette"
            android:layout_below="@id/note"
            android:layout_marginTop="20dp"
            android:layout_marginBottom="20dp"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:spectrum_colors="@array/demo_colors"/>

    </RelativeLayout>

</android.support.v4.widget.NestedScrollView>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.design.widget.CoordinatorLayout
    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"
    tools:context=".activity.main.MainActivity">

    <android.support.v4.widget.SwipeRefreshLayout
        android:id="@+id/swipe_refresh"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <android.support.v7.widget.RecyclerView
            android:id="@+id/recycler_view"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

    </android.support.v4.widget.SwipeRefreshLayout>

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/add"
        android:layout_margin="16dp"
        android:layout_gravity="bottom|end"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:src="@drawable/ic_add"/>

</android.support.design.widget.CoordinatorLayout>

ApiClient.java

import retrofit2.Retrofit;
import retrofit2.converter.gson.GsonConverterFactory;

public class ApiClient {

    private static final String BASE_URL = "http://your-domain-name.000webhostapp.com/";
    private static Retrofit retrofit;

    public static Retrofit getApiClient() {

        if (retrofit == null) {
            retrofit = new Retrofit.Builder()
                    .baseUrl(BASE_URL)
                    .addConverterFactory(GsonConverterFactory.create())
                    .build();
        }

        return retrofit;
    }

}

ApiInterfce.java

import com.haerulmuttaqin.mynotesapp.model.Note;

import java.util.List;

import retrofit2.Call;
import retrofit2.http.Field;
import retrofit2.http.FormUrlEncoded;
import retrofit2.http.GET;
import retrofit2.http.POST;

public interface ApiInterface {

    @FormUrlEncoded
    @POST("save.php")
    Call<Note> saveNote(
        @Field("title") String title,
        @Field("note") String note,
        @Field("color") int color
    );

    @GET("notes.php")
    Call<List<Note>> getNotes();

    @FormUrlEncoded
    @POST("update.php")
    Call<Note> updateNote(
            @Field("id") int id,
            @Field("title") String title,
            @Field("note") String note,
            @Field("color") int color
    );

    @FormUrlEncoded
    @POST("delete.php")
    Call<Note> deleteNote( @Field("id") int id );

}

build.gradle

implementation 'com.android.support:design:27.1.1'
implementation 'com.android.support:recyclerview-v7:27.1.1'
implementation 'com.android.support:cardview-v7:27.1.1'
implementation 'com.squareup.retrofit2:retrofit:2.4.0'
implementation 'com.squareup.retrofit2:converter-gson:2.4.0'
implementation 'com.thebluealliance:spectrum:0.7.1'

colors.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#1d1f2d</color>
    <color name="colorPrimaryDark">#15161e</color>
    <color name="colorAccent">#189be7</color>

    <!--color palete-->
    <color name="white">#dde6ec</color>
    <color name="blue">#7ec4ed</color>
    <color name="yellow">#d0fc7d</color>
    <color name="pink">#ed579a</color>
    <color name="green">#2aed76</color>

    <array name="demo_colors">
        <item>@color/white</item>
        <item>@color/blue</item>
        <item>@color/yellow</item>
        <item>@color/pink</item>
        <item>@color/green</item>
    </array>

</resources>

EditorActivity.java

import android.app.AlertDialog;
import android.app.ProgressDialog;
import android.content.DialogInterface;
import android.content.Intent;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.EditText;
import android.widget.Toast;

import com.haerulmuttaqin.mynotesapp.R;
import com.haerulmuttaqin.mynotesapp.api.ApiClient;
import com.haerulmuttaqin.mynotesapp.api.ApiInterface;
import com.haerulmuttaqin.mynotesapp.model.Note;
import com.thebluealliance.spectrum.SpectrumPalette;

import retrofit2.Call;
import retrofit2.Callback;
import retrofit2.Response;

public class EditorActivity extends AppCompatActivity implements EditorView {

    EditText et_title, et_note;
    ProgressDialog progressDialog;
    SpectrumPalette palette;

    EditorPresenter presenter;

    int color, id;
    String title, note;
    
    Menu actionMenu;

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

        et_title = findViewById(R.id.title);
        et_note = findViewById(R.id.note);
        palette = findViewById(R.id.palette);

        palette.setOnColorSelectedListener(
                clr -> color = clr
        );


//      Progress Dialog
        progressDialog = new ProgressDialog(this);
        progressDialog.setMessage("Please wait...");

        presenter = new EditorPresenter(this);

        Intent intent = getIntent();
        id = intent.getIntExtra("id", 0);
        title = intent.getStringExtra("title");
        note = intent.getStringExtra("note");
        color = intent.getIntExtra("color", 0);
        
        setDataFromIntentExtra();

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.menu_editor, menu);
        actionMenu = menu;

        if (id != 0) {
            actionMenu.findItem(R.id.edit).setVisible(true);
            actionMenu.findItem(R.id.delete).setVisible(true);
            actionMenu.findItem(R.id.save).setVisible(false);
            actionMenu.findItem(R.id.update).setVisible(false);
        } else {
            actionMenu.findItem(R.id.edit).setVisible(false);
            actionMenu.findItem(R.id.delete).setVisible(false);
            actionMenu.findItem(R.id.save).setVisible(true);
            actionMenu.findItem(R.id.update).setVisible(false);
        }


        return true;
    }


    @Override
    public boolean onOptionsItemSelected(MenuItem item) {

        String title = et_title.getText().toString().trim();
        String note = et_note.getText().toString().trim();
        int color = this.color;

        switch (item.getItemId()) {
            case R.id.save:
                //Save
                if (title.isEmpty()) {
                    et_title.setError("Please enter a title");
                } else if (note.isEmpty()) {
                    et_note.setError("Please enter a note");
                } else {
                    presenter.saveNote(title, note, color);
                }
                return true;

            case R.id.edit:

                editMode();
                actionMenu.findItem(R.id.edit).setVisible(false);
                actionMenu.findItem(R.id.delete).setVisible(false);
                actionMenu.findItem(R.id.save).setVisible(false);
                actionMenu.findItem(R.id.update).setVisible(true);

                return true;

            case R.id.update:
                //Update

                if (title.isEmpty()) {
                    et_title.setError("Please enter a title");
                } else if (note.isEmpty()) {
                    et_note.setError("Please enter a note");
                } else {
                    presenter.updateNote(id, title, note, color);
                }

                return true;

            case R.id.delete:

                AlertDialog.Builder alertDialog = new AlertDialog.Builder(this);
                alertDialog.setTitle("Confirm !");
                alertDialog.setMessage("Are you sure?");
                alertDialog.setNegativeButton("Yes", (dialog, which) -> {
                    dialog.dismiss();
                    presenter.deleteNote(id);
                });
                alertDialog.setPositiveButton("Cencel",
                        (dialog, which) -> dialog.dismiss());

                alertDialog.show();

                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }


    @Override
    public void showProgress() {
        progressDialog.show();
    }

    @Override
    public void hideProgress() {
        progressDialog.hide();
    }

    @Override
    public void onRequestSuccess(String message) {
        Toast.makeText(EditorActivity.this,
                message,
                Toast.LENGTH_SHORT).show();
        setResult(RESULT_OK);
        finish(); //back to main activity
    }

    @Override
    public void onRequestError(String message) {
        Toast.makeText(EditorActivity.this,
                message,
                Toast.LENGTH_SHORT).show();
    }

    private void setDataFromIntentExtra() {

        if (id != 0) {
            et_title.setText(title);
            et_note.setText(note);
            palette.setSelectedColor(color);

            getSupportActionBar().setTitle("Update Note");
            readMode();
        } else {
            palette.setSelectedColor(getResources().getColor(R.color.white));
            color = getResources().getColor(R.color.white);
            editMode();
        }

    }

    private void editMode() {
        et_title.setFocusableInTouchMode(true);
        et_note.setFocusableInTouchMode(true);
        palette.setEnabled(true);
    }

    private void readMode() {
        et_title.setFocusableInTouchMode(false);
        et_note.setFocusableInTouchMode(false);
        et_title.setFocusable(false);
        et_note.setFocusable(false);
        palette.setEnabled(false);
    }
}

item_note.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_marginLeft="10dp"
    android:layout_marginRight="10dp"
    android:layout_marginTop="4dp"
    android:layout_marginBottom="4dp"
    app:cardCornerRadius="2dp"
    app:cardElevation="1dp"
    android:clickable="true"
    android:focusable="true"
    android:foreground="?attr/selectableItemBackground"
    android:id="@+id/card_item">

    <LinearLayout
        android:id="@+id/line"
        android:layout_width="10dp"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:background="#49000000"/>

    <RelativeLayout
        android:padding="10dp"
        android:layout_marginStart="10dp"
        android:layout_marginLeft="10dp"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/title"
            android:text="@string/to_do"
            android:textSize="18sp"
            android:textColor="@android:color/black"
            android:layout_width="match_parent"
            android:layout_height="wrap_content" />

        <TextView
            android:id="@+id/note"
            android:layout_below="@id/title"
            android:text="@string/enter_note"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="5dp"/>

        <TextView
            android:id="@+id/date"
            android:layout_below="@id/note"
            android:text="@string/date"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginTop="10dp"
            android:gravity="end"/>

    </RelativeLayout>

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

MainActivity.java

import android.content.Intent;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.widget.Toast;

import com.haerulmuttaqin.mynotesapp.R;
import com.haerulmuttaqin.mynotesapp.activity.editor.EditorActivity;
import com.haerulmuttaqin.mynotesapp.model.Note;

import java.util.List;

public class MainActivity extends AppCompatActivity implements MainView {

    private static final int INTENT_ADD = 100;
    private static final int INTENT_EDIT = 200;
    FloatingActionButton fab;
    RecyclerView recyclerView;
    SwipeRefreshLayout swipeRefresh;

    MainPresenter presenter;
    MainAdapter adapter;
    MainAdapter.ItemClickListener itemClickListener;

    List<Note> note;

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

        swipeRefresh = findViewById(R.id.swipe_refresh);
        recyclerView = findViewById(R.id.recycler_view);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));

        fab = findViewById(R.id.add);
        fab.setOnClickListener(view ->
            startActivityForResult(
                    new Intent(this, EditorActivity.class),
                    INTENT_ADD)
        );

        presenter = new MainPresenter(this);
        presenter.getData();

        swipeRefresh.setOnRefreshListener(
                () -> presenter.getData()
        );

        itemClickListener = ((view, position) -> {
            int id = note.get(position).getId();
            String title = note.get(position).getTitle();
            String notes = note.get(position).getNote();
            int color = note.get(position).getColor();

            Intent intent = new Intent(this, EditorActivity.class);
            intent.putExtra("id", id);
            intent.putExtra("title", title);
            intent.putExtra("note", notes);
            intent.putExtra("color", color);
            startActivityForResult(intent, INTENT_EDIT);

        });
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

        if (requestCode == INTENT_ADD && resultCode == RESULT_OK) {
            presenter.getData(); //reload data
        }
        else if (requestCode == INTENT_EDIT && resultCode == RESULT_OK) {
            presenter.getData(); //reload data
        }

    }

    @Override
    public void showLoading() {
        swipeRefresh.setRefreshing(true);
    }

    @Override
    public void hideLoading() {
        swipeRefresh.setRefreshing(false);
    }

    @Override
    public void onGetResult(List<Note> notes) {
        adapter = new MainAdapter(this, notes, itemClickListener);
        adapter.notifyDataSetChanged();
        recyclerView.setAdapter(adapter);

        note = notes;
    }

    @Override
    public void onErrorLoading(String message) {
        Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
    }
}

menu_editor.xml

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/edit"
        android:title="@string/edit"
        android:icon="@drawable/ic_edit"
        app:showAsAction="always" />

    <item
        android:id="@+id/delete"
        android:title="@string/delete"
        android:icon="@drawable/ic_delete"
        app:showAsAction="always" />


    <item
        android:id="@+id/update"
        android:title="@string/update"
        android:icon="@drawable/ic_save"
        app:showAsAction="always" />


    <item
        android:id="@+id/save"
        android:title="@string/save"
        android:icon="@drawable/ic_save"
        app:showAsAction="always" />

</menu>

Note.java

import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

public class Note {

    @Expose
    @SerializedName("id") private int id;
    @Expose
    @SerializedName("title") private String title;
    @Expose
    @SerializedName("note") private String note;
    @Expose
    @SerializedName("color") private int color;
    @Expose
    @SerializedName("date") private String date;
    @Expose
    @SerializedName("success") private Boolean success;
    @Expose
    @SerializedName("message") private String message;


    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getNote() {
        return note;
    }

    public void setNote(String note) {
        this.note = note;
    }

    public int getColor() {
        return color;
    }

    public void setColor(int color) {
        this.color = color;
    }

    public String getDate() {
        return date;
    }

    public void setDate(String date) {
        this.date = date;
    }

    public Boolean getSuccess() {
        return success;
    }

    public void setSuccess(Boolean success) {
        this.success = success;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
}

i have used your php code.
`<?php
header("Content-type:application/json");

require_once('connect.php');

$query = mysqli_query($conn,"SELECT * FROM `retrofit` ") ;

$response = array();

while($row = mysqli_fetch_assoc($query)){
    
    array_push($response,
    array(
        'userId' =>$row['userId'],
        'id' =>$row['id'],
        'title' =>$row['title'],
        'body' =>$row['body']));
}

echo json_encode($response);

?>`

my php code is not giving me proper json .please help.

[{"userId":"1","id":null,"title":"sunt aut facere repellat provident occaecati excepturi optio reprehenderit","body":"quia et suscipit\\nsuscipit recusandae consequuntur expedita et cum\\nreprehenderit molestiae ut ut quas totam\\nnostrum rerum est autem sunt rem eveniet architecto"},{"userId":"1","id":null,"title":"qui est esse","body":"est rerum tempore vitae\\nsequi sint nihil reprehenderit dolor beatae ea dolores neque\\nfugiat blanditiis voluptate porro vel nihil molestiae ut reiciendis\\nqui aperiam non debitis possimus qui neque nisi nulla"}]

i need urgent help

Please send php code too. I need it very much.

i got error use json setlelient(true at line number1 column number 1

i got error use json setlelient(true at line number1 column number 1

Please check your json output from php code

how to do that

Where is MainAdapter bro?

What is EditorPresenter ????

Hello pls it is not sorting the note post by descending, when i add it goes down, it does not show at the up(latest post).

you're missing multiple files:
MainPresenter
EditorPresenter
MainView ??

Thank you,
have small error is when get color no data get, but when i delete select color line from note.php data get without error...why?
and how can be get color and set as cardview background?
thanks again!

I keep on getting this error "Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $". Anyone who can help? Thanks in advance.

can you send me the php files for this project 
thank you

After adding INTENT_ADD, my application force close when I click the add data button Can anyone help?

I keep on getting this error "Use JsonReader.setLenient(true) to accept malformed JSON at line 1 column 1 path $". Anyone who can help? Thanks in advance.