import android.Manifest
import android.content.pm.PackageManager
import android.os.Bundle
import android.widget.Button
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
class MainActivity : AppCompatActivity() {
companion object {
private const val CAMERA_PERMISSION_CODE = 100
private const val STORAGE_PERMISSION_CODE = 101
}
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
// Defining Buttons
val storage: Button? = findViewById(R.id.storage)
val camera: Button? = findViewById(R.id.camera)
// Set Buttons on Click Listeners
storage?.setOnClickListener {checkPermission(
Manifest.permission.WRITE_EXTERNAL_STORAGE,
STORAGE_PERMISSION_CODE)
}
camera?.setOnClickListener {
checkPermission(Manifest.permission.CAMERA,
CAMERA_PERMISSION_CODE)
}
}
// Function to check and request permission.
private fun checkPermission(permission: String, requestCode: Int) {
if (ContextCompat.checkSelfPermission(this@MainActivity, permission) == PackageManager.PERMISSION_DENIED) {
// Requesting the permission
ActivityCompat.requestPermissions(this@MainActivity, arrayOf(permission), requestCode)
} else {
Toast.makeText(this@MainActivity, "Permission already granted", Toast.LENGTH_SHORT).show()
}
}
// This function is called when the user accepts or decline the permission.
// Request Code is used to check which permission called this function.
// This request code is provided when the user is prompt for permission.
override fun onRequestPermissionsResult(requestCode: Int,
permissions: Array,
grantResults: IntArray) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults)
if (requestCode == CAMERA_PERMISSION_CODE) {
if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this@MainActivity, "Camera Permission Granted", Toast.LENGTH_SHORT).show()
} else {
Toast.makeText(this@MainActivity, "Camera Permission Denied", Toast.LENGTH_SHORT).show()
}
} else if (requestCode == STORAGE_PERMISSION_CODE) {
if (grantResults.isNotEmpty() && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
Toast.makeText(this@MainActivity, "Storage Permission Granted", Toast.LENGTH_SHORT).show()
} else {
Toast.makeText(this@MainActivity, "Storage Permission Denied", Toast.LENGTH_SHORT).show()
}
}
}
}
|
