// Verify APK file String calculatedMD5 = calculateMD5(apkFile); if (calculatedMD5.equals(APK_MD5)) { // APK file is verified, install it installAPK(context, apkFile); } else { // APK file is corrupted or tampered with Toast.makeText(context, "APK file verification failed", Toast.LENGTH_SHORT).show(); } } catch (Exception e) { // Handle exceptions } }