🚀 app_installer_plus

A robust, production-ready Flutter plugin to download and safely install APKs on Android devices. Ideal for handling seamless in-app updates or installing APKs directly from a URL.

✅ Android-only | 📦 FileProvider Integration | 🛡️ Leak-Proof Memory Management

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✨ Features

• 📥 Direct URL Downloads: Fetch APKs from any direct web URL.
• 📊 Granular Metrics: Track real-time progress, download speed, time remaining, and byte sizes.
• 🛡️ Concurrency Protection: Automatically prevents users from accidentally starting duplicate downloads.
• 🧹 Smart Auto-Cleanup NEW: Option to automatically delete corrupted/partial files if a network error occurs (deleteOnError).
• 🛑 Advanced Cancellation NEW: Cancel active downloads and optionally wipe the partial file from storage (deletePartialDownload).
• 🚨 Modern Error Handling NEW: Catch specific failure states using FileDownloadException and DownloadErrorType.

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Android Configuration

1. Add this to your AndroidManifest.xml inside the <application> tag :

<provider
    android:name="androidx.core.content.FileProvider"
    android:authorities="${applicationId}.fileprovider"
    android:exported="false"
    android:grantUriPermissions="true">
    <meta-data
        android:name="android.support.FILE_PROVIDER_PATHS"
        android:resource="@xml/file_paths" />
</provider>

2. Create a file named file_paths.xml inside the android/app/src/main/res/xml/ folder:

<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <external-path name="external_files" path="."/>
    <files-path name="files" path="."/>
</paths>

3. Add Permission

• In android/app/src/main/AndroidManifest.xml, add these permissions:

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.REQUEST_INSTALL_PACKAGES"/>

Code Example

1. Apk Update

import 'package:app_installer_plus/app_installer_plus.dart';

Future<void> updateApp() async {
  try {
    await AppInstallerPlus().downloadAndInstallApk(
      downloadFileUrl: "https://www.example.com/myapp.apk",
      deleteOnError: true, // Automatically deletes partial file if network fails
      onProgress: (progress) {
        print("Download Progress: ${(progress * 100).toStringAsFixed(0)}%");
      },
      onDownloadedSize: (downloadedSize) => print("Downloaded: $downloadedSize"),
      onTotalSize: (totalSize) => print("Total Size: $totalSize"),
      onSpeed: (speed) => print("Speed: $speed"),
      onTimeLeft: (timeLeft) => print("Time Left: $timeLeft"),
    );
  } on FileDownloadException catch (e) {
    if (e.type == DownloadErrorType.alreadyRunning) {
      print("A download is already in progress!");
    } else {
      print("Download failed: ${e.originalError}");
    }
  }
}

2. Delete the downloaded apk

  await AppInstallerPlus().removedDownloadedApk();

• Remove the downloaded apk once the process completed

3. Cancel the download request

// Cancels the download and permanently wipes the incomplete file from storage
await AppInstallerPlus().cancelDownload(deletePartialDownload: true);

• Stops an active APK download before it finishes.

📦 Installation

Add this to your pubspec.yaml:

dependencies:
  app_installer_plus: ^1.2.0