Kotlin problem saving images

Android
1

main2activity is not saving the image but I don’t know why ?

the listView on MainActivity show NOTHING

MainActivity :

MainActivity :

Code:

package com.example.picgallery

import android.content.Context
import android.content.Intent
import android.graphics.Bitmap
import android.graphics.BitmapFactory
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import android.widget.ArrayAdapter
import kotlinx.android.synthetic.main.activity_main.*
import java.lang.Exception

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val artNameArray = ArrayList<String>()
        val artImageArray = ArrayList<Bitmap>()

        val arrayAdapter = ArrayAdapter(this, android.R.layout.simple_list_item_1, artNameArray)
        listView.adapter = arrayAdapter

        try {
            val dataBase = this.openOrCreateDatabase("Arts", Context.MODE_PRIVATE,null)
            dataBase.execSQL("CREATE TABLE IF NOT EXISTS arts (name VARCHAR, image BLOB)")
            val cursor = dataBase.rawQuery("SELECT * FROM arts", null)

            val nameIx = cursor.getColumnIndex("name")
            val imageIx = cursor.getColumnIndex("image")
            cursor.moveToFirst()

            while (cursor != null){
                artNameArray.add(cursor.getString(nameIx))
                val byteArray = cursor.getBlob(imageIx)
                val image = BitmapFactory.decodeByteArray(byteArray,0,byteArray.size)
                artImageArray.add(image)
                cursor.moveToNext()
                arrayAdapter.notifyDataSetChanged()

            }
            cursor?.close()

        }catch (e:Exception){e.printStackTrace()}

    }

    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
        val menuInflater = menuInflater
        menuInflater.inflate(R.menu.add_art,menu)
        return super.onCreateOptionsMenu(menu)
    }

    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
        if (item?.itemId == R.id.add_art){
            val intent = Intent(applicationContext,Main2Activity::class.java)
            startActivity(intent)
        }
        return super.onOptionsItemSelected(item)
    }
}

Main2Activity :

Code:

Main2Activity

Code:
import android.app.Activity
import android.content.ContentValues
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.graphics.Bitmap
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.provider.MediaStore
import android.view.View
import android.widget.Toast
import kotlinx.android.synthetic.main.activity_main2.*
import java.io.ByteArrayOutputStream
import java.lang.Exception
import java.util.jar.Manifest

class Main2Activity : AppCompatActivity() {

    var selectedImage: Bitmap? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main2)
    }
    fun select1(view: View){
        if(checkSelfPermission(android.Manifest.permission.READ_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED){
            requestPermissions(arrayOf(android.Manifest.permission.READ_EXTERNAL_STORAGE),2)
        }else{val intent = Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI)
            startActivityForResult(intent,1)
        }
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        if (requestCode==2){
            if (grantResults.size > 0 && grantResults[0]==PackageManager.PERMISSION_GRANTED){
                val intent = Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI)
                startActivityForResult(intent,1)
            }
        }

        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        if(requestCode ==1 && resultCode == Activity.RESULT_OK && data !=null){
            val image = data.data
            try {
                selectedImage = MediaStore.Images.Media.getBitmap(this.contentResolver,image)
                imageView.setImageBitmap(selectedImage)
            }catch (e:Exception){e.printStackTrace()}


        }
        super.onActivityResult(requestCode, resultCode, data)
    }

    fun save(view: View){
        val artName = editText.text.toString()
        val outputStream = ByteArrayOutputStream()
        selectedImage?.compress(Bitmap.CompressFormat.PNG,50,outputStream)
        val byteArray = outputStream.toByteArray() // the image as a byteArray


        try {
          val myDataBase = this.openOrCreateDatabase("Arts", Context.MODE_PRIVATE, null)
          myDataBase.execSQL("CREATE TABLE IF NOT EXISTS arts (name VARCHAR, age BLOB)")
            http://myDataBase.execSQL("INSERT INTO musicians (name,age) VALUES ('$artName',50)")
          val values = ContentValues()
            values.put("name",artName)
            values.put("image",byteArray)
          myDataBase.insert("arts",null,values)
        }catch (e: Exception){e.printStackTrace()}



        val intent = Intent(applicationContext,MainActivity::class.java)
        startActivity(intent)

    }
}

I also added <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"></uses-permission>

2

Both code parts only read the database. If it is empty, they create a database with an empty table. But no-where is there any image put into the database. In general if you do this, first make sure that the content of your database is correct (with the emulator you can download the database file onto your computer and explore the database).

3

I pasted the wrong code for main2activity

here is the code and it doesn’t save anything:

Main2Activity

Code:
import android.app.Activity
import android.content.ContentValues
import android.content.Context
import android.content.Intent
import android.content.pm.PackageManager
import android.graphics.Bitmap
import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import android.provider.MediaStore
import android.view.View
import android.widget.Toast
import kotlinx.android.synthetic.main.activity_main2.*
import java.io.ByteArrayOutputStream
import java.lang.Exception
import java.util.jar.Manifest

class Main2Activity : AppCompatActivity() {

    var selectedImage: Bitmap? = null

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main2)
    }
    fun select1(view: View){
        if(checkSelfPermission(android.Manifest.permission.READ_EXTERNAL_STORAGE)!= PackageManager.PERMISSION_GRANTED){
            requestPermissions(arrayOf(android.Manifest.permission.READ_EXTERNAL_STORAGE),2)
        }else{val intent = Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI)
            startActivityForResult(intent,1)
        }
    }

    override fun onRequestPermissionsResult(requestCode: Int, permissions: Array<out String>, grantResults: IntArray) {
        if (requestCode==2){
            if (grantResults.size > 0 && grantResults[0]==PackageManager.PERMISSION_GRANTED){
                val intent = Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI)
                startActivityForResult(intent,1)
            }
        }

        super.onRequestPermissionsResult(requestCode, permissions, grantResults)
    }

    override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        if(requestCode ==1 && resultCode == Activity.RESULT_OK && data !=null){
            val image = data.data
            try {
                selectedImage = MediaStore.Images.Media.getBitmap(this.contentResolver,image)
                imageView.setImageBitmap(selectedImage)
            }catch (e:Exception){e.printStackTrace()}


        }
        super.onActivityResult(requestCode, resultCode, data)
    }

    fun save(view: View){
        val artName = editText.text.toString()
        val outputStream = ByteArrayOutputStream()
        selectedImage?.compress(Bitmap.CompressFormat.PNG,50,outputStream)
        val byteArray = outputStream.toByteArray() // the image as a byteArray


        try {
          val myDataBase = this.openOrCreateDatabase("Arts", Context.MODE_PRIVATE, null)
          myDataBase.execSQL("CREATE TABLE IF NOT EXISTS arts (name VARCHAR, age BLOB)")
          val values = ContentValues()
            values.put("name",artName)
            values.put("image",byteArray)
          myDataBase.insert("arts",null,values)
        }catch (e: Exception){e.printStackTrace()}



        val intent = Intent(applicationContext,MainActivity::class.java)
        startActivity(intent)

    }
}
4

I also tried with statement but it also didn’t save, please help

5

I have the same problem
…

fun Save (view: View) {

    var sharedPreferences = getSharedPreferences( "SavePhone" , Context.MODE_PRIVATE)
    var edit = sharedPreferences.edit()
    edit.putString("Phone",editText.text.toString())
    edit.apply()
    Toast.makeText(this, " saved ", Toast.LENGTH_LONG).show()

…