activity upload

package com.andiarsipnaskahdigitalbengkayang;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore;
import android.util.Base64;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import com.andiarsipnaskahdigitalbengkayang.service.Service_Connector;

import org.json.JSONObject;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class ContohTambahActivity extends AppCompatActivity implements View.OnClickListener {
    Button btnAdd, btnUpload;
    ImageView imageView;
    String isi_file;

    private Bitmap bitmap, decode;
    private Uri filePath;

    private int PICK_IMAGE_REQUEST = 1;
    private static final int STORAGE_PERMISSION_CODE = 123;

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

        btnAdd = findViewById(R.id.btnAdd);
        btnUpload = findViewById(R.id.btnUpload);
        imageView = findViewById(R.id.imageView);

        btnAdd.setOnClickListener(this);
        btnUpload.setOnClickListener(this);

    }

    @Override
    public void onClick(View v) {
        if (v == btnAdd) {
            requestStoragePermission();
            showFileChooser();
        }
        if (v == btnUpload) {
            uploadImage(isi_file);
            Log.i("daaata", isi_file);
        }
    }

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

        if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK && data != null && data.getData() != null) {
            filePath = data.getData();
            try {
                bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), filePath);
                bitmaptostring(bitmap);
                imageView.setImageBitmap(bitmap);

            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    private void showFileChooser() {
        Intent intent = new Intent();
        intent.setType("image/*");
        intent.setAction(Intent.ACTION_GET_CONTENT);
        startActivityForResult(Intent.createChooser(intent, "Select Picture"), PICK_IMAGE_REQUEST);
    }

    private void requestStoragePermission() {
        if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED)
            return;

        if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.READ_EXTERNAL_STORAGE)) {
            //If the user has denied the permission previously your code will come to this block
            //Here you can explain why you need this permission
            //Explain here why you need this permission
        }
        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.READ_EXTERNAL_STORAGE}, STORAGE_PERMISSION_CODE);
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {

        //Checking the request code of our request
        if (requestCode == STORAGE_PERMISSION_CODE) {

            //If permission is granted
            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //Displaying a toast
                Toast.makeText(this, "Permission granted now you can read the storage", Toast.LENGTH_LONG).show();
            } else {
                //Displaying another toast if permission is not granted
                Toast.makeText(this, "Oops you just denied the permission", Toast.LENGTH_LONG).show();
            }
        }
    }

    public void bitmaptostring(Bitmap bitmap){
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        bitmap.compress(Bitmap.CompressFormat.PNG,100,bos);
        byte[] bb = bos.toByteArray();
        isi_file = Base64.encodeToString(bb, Base64.DEFAULT);
    }

    private void uploadImage(String image){
        Map<String, String> map = new HashMap();
        map.put("image", image);
        //untuk send post session request
        Service_Connector.sendpostrequest(ContohTambahActivity.this, "upload.php", map, new Service_Connector.VolleyResponseListener_v3() {
            @Override
            public void onError(String message) {
                Toast.makeText(ContohTambahActivity.this, "Gagal menambahkan arsip", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onResponese(String response) {
                try {
                    JSONObject respon = new JSONObject(response);
                    if (respon.getString("error").equals("false")) {
                        Toast.makeText(ContohTambahActivity.this, "Data berhasil diperbaharui", Toast.LENGTH_SHORT).show();
//                        Intent intent = new Intent(ContohTambahActivity.this, DetailArsipActivity.class);
//                        startActivity(intent);
//                        finish();

                    } else if (respon.getString("error").equals("true")){
                        Toast.makeText(ContohTambahActivity.this, respon.getString("message"), Toast.LENGTH_SHORT).show();
                    }

                } catch (Exception e) {

                }

            }

            @Override
            public void onNoConnection(String message) {
                Toast.makeText(ContohTambahActivity.this, "Tidak ada koneksi internet", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void OnServerError(String message) {
                Toast.makeText(ContohTambahActivity.this, "Gagal memperbaharui arsip", Toast.LENGTH_SHORT).show();
            }

            @Override
            public void OnTimeOut() {
                Toast.makeText(ContohTambahActivity.this, "Habis waktu, coba lagi", Toast.LENGTH_SHORT).show();
            }
        });
    }
}