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August 30, 2020 15:07
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Android Studio - Take Screenshot
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package com.dm.tutorialscreenshot2 | |
import android.Manifest | |
import android.content.Intent | |
import android.content.pm.PackageManager | |
import android.graphics.Bitmap | |
import android.graphics.Color | |
import android.net.Uri | |
import android.os.Bundle | |
import android.os.Environment | |
import android.os.StrictMode | |
import android.os.StrictMode.VmPolicy | |
import android.view.View | |
import android.widget.Button | |
import android.widget.ImageView | |
import androidx.appcompat.app.AppCompatActivity | |
import androidx.core.app.ActivityCompat | |
import kotlinx.android.synthetic.main.activity_main.* | |
import java.io.* | |
import java.util.* | |
//dichiarazione della variabile di tipo View (vista) | |
private var mainL: View? = null | |
//dichiarazione della variabile di tipo ImageView | |
private var imageView: ImageView? = null | |
private var btn: Button? = null | |
class MainActivity : AppCompatActivity() { | |
override fun onCreate(savedInstanceState: Bundle?) { | |
super.onCreate(savedInstanceState) | |
setContentView(R.layout.activity_main) | |
mainL = findViewById(R.id.main) | |
imageView = findViewById(R.id.imageview) | |
btn = findViewById(R.id.bnScreenshot) | |
//richiesta dei permessi all'avvio dell'app | |
ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.WRITE_EXTERNAL_STORAGE, | |
Manifest.permission.READ_EXTERNAL_STORAGE), PackageManager.PERMISSION_GRANTED) | |
val builder = VmPolicy.Builder() | |
StrictMode.setVmPolicy(builder.build()) | |
btn!!.setOnClickListener { | |
//chiamata dell'object Screenshot | |
val b: Bitmap = Screenshot.takescreenshotOfRootView(imageview) | |
imageView!!.setImageBitmap(b) | |
//questa riga serve per far vedere bene l'immagine acquisita | |
mainL!!.setBackgroundColor(Color.parseColor("#999999")) | |
//***************************************************** | |
//chiamata alla funzione saveScreenshot con passaggio immagine creata | |
saveScreenshot(b) | |
} | |
} | |
//funzione che esegue il salvataggio nella cartella Download del dispositivo dell'immagine creata e la sua visualizzazione | |
private fun saveScreenshot(bitmap: Bitmap) { | |
val filePath = Environment.getExternalStorageDirectory().toString() + "/Download/" + Calendar.getInstance().time.toString() + ".jpg" | |
val fileScreenshot = File(filePath) | |
val fileOutputStream: FileOutputStream? | |
try { | |
fileOutputStream = FileOutputStream(fileScreenshot) | |
bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fileOutputStream) | |
fileOutputStream.flush() | |
fileOutputStream.close() | |
} catch (e: java.lang.Exception) { | |
e.printStackTrace() | |
} | |
//Intent per la visualizzazione dell'immagine salvata | |
val intent = Intent(Intent.ACTION_VIEW) | |
val uri: Uri = Uri.fromFile(fileScreenshot) | |
intent.setDataAndType(uri, "image/jpeg") | |
intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK) | |
this.startActivity(intent) | |
} | |
} |
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