短信轰在线网页版入口客户服务短信轰在线网页版入口数通增值观察站短信轰在线网页版入口云通运维速递

Android Studio ```kotlin import androidx.appcompat.app.AppCompatActivity import android.os.Bundle import android.view.View import android.widget.Button import android.widget.EditText import android.widget.Toast class MainActivity : AppCompatActivity() { override fun onCreate(s视频edInstanceState: Bundle?) { super.onCreate(s影音edInstanceState) setContentView(R.layout.activity_main) val downloadButton = findViewById(R.id.download_button) val urlEditText = findViewById(R.id.url_edit_text) downloadButton.setOnClickListener(View.OnClickListener { val url = urlEditText.text.toString() // Start a download task DownloadTask(this).execute(url) }) } // AsyncTask to download the file private class DownloadTask internal constructor(context: Context) : AsyncTask() { private val context: Context = context private var mProgressDialog: ProgressDialog? = null override fun onPreExecute() { super.onPreExecute() // Create and show a progress dialog mProgressDialog = ProgressDialog(context) mProgressDialog?.setTitle("Downloading...") mProgressDialog?.setMessage("Please wait...") mProgressDialog?.setCancelable(false) mProgressDialog?.show() } override fun doInBackground(vararg params: String): String { val url = params[0] // Download the file val file = URL(url).openConnection().getInputStream() val bytes = file.readBytes() // S影音e the file to the device val path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString() val fileName = "downloaded_file.jpg" val fileOutputStream = FileOutputStream("$path/$fileName") fileOutputStream.write(bytes) fileOutputStream.close() return "File downloaded successfully" } override fun onPostExecute(result: String) { super.onPostExecute(result) // Dismiss the progress dialog mProgressDialog?.dismiss() // Show a toast message Toast.makeText(context, result, Toast.LENGTH_SHORT).show() } } } ``` XML Layout ```xml xmlns:app="http://schemas.android/apk/res-auto" xmlns:tools="http://schemas.android/tools" android:layout_width="match_parent" android:layout_height="match_parent"> android:id="@+id/url_edit_text" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="Enter URL" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toTopOf="parent" /> android:id="@+id/download_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Download" app:layout_constraintBottom_toBottomOf="parent" app:layout_constraintEnd_toEndOf="parent" app:layout_constraintStart_toStartOf="parent" app:layout_constraintTop_toBottomOf="@+id/url_edit_text" /> ```