Fix #83: Add System Installer fallback button on install failure

Author: minhnq1-apero

app/src/main/java/app/pwhs/universalinstaller/presentation/install/DialogInstallActivity.kt

@@ -425,6 +425,24 @@ class DialogInstallActivity : ComponentActivity() {
                             onSkipParse = if (isApk) {
                                 { viewModel.skipParseAndInstallSingle() }
                             } else null,
+                            onFallbackInstall = {
+                                val apkUri = dialogTarget?.apkUri
+                                if (isApk && apkUri != null) {
+                                    try {
+                                        val intent = Intent(Intent.ACTION_VIEW).apply {
+                                            setDataAndType(apkUri, "application/vnd.android.package-archive")
+                                            flags = Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_GRANT_READ_URI_PERMISSION
+                                        }
+                                        startActivity(intent)
+                                    } catch (e: Exception) {
+                                        Timber.e(e, "Failed to launch system installer fallback")
+                                        Toast.makeText(context, "System installer not available", Toast.LENGTH_SHORT).show()
+                                    }
+                                    viewModel.dialogClose()
+                                    viewModel.clearDialogTarget()
+                                    finish()
+                                }
+                            }.takeIf { isApk && dialogTarget?.apkUri != null },
                         )
 
                         PositionDialog(

app/src/main/java/app/pwhs/universalinstaller/presentation/install/InstallUiState.kt

@@ -42,6 +42,7 @@ data class DialogTarget(
     val packageName: String,
     val appName: String,
     val iconPath: String?,
+    val apkUri: android.net.Uri? = null,
 )
 
 sealed interface DownloadState {

app/src/main/java/app/pwhs/universalinstaller/presentation/install/InstallViewModel.kt

@@ -464,6 +464,7 @@ class InstallViewModel(
                                 packageName = pkgForTarget,
                                 appName = nameForTarget,
                                 iconPath = iconPath,
+                                apkUri = originalUri,
                             )
                         }
                     } else null,
@@ -487,6 +488,7 @@ class InstallViewModel(
                                 packageName = pkgForTarget,
                                 appName = nameForTarget,
                                 iconPath = iconPath,
+                                apkUri = originalUri,
                             )
                         }
                     } else null,

app/src/main/java/app/pwhs/universalinstaller/presentation/install/dialog/DialogGenerator.kt

@@ -52,6 +52,7 @@ fun generateDialogParams(
     onToggleAllUsers: (Boolean) -> Unit,
     onSelectUserId: (Int?) -> Unit,
     onSkipParse: (() -> Unit)? = null,
+    onFallbackInstall: (() -> Unit)? = null,
 ): DialogParams {
     return when (val stage = uiState.dialogStage) {
         DialogStage.Loading -> {
@@ -217,6 +218,7 @@ fun generateDialogParams(
                             errorMessage = stage.errorMessage,
                             onClose = onCloseAfterResult,
                             onRetry = onRetry,
+                            onFallbackInstall = onFallbackInstall
                         )
                     }
                 )

app/src/main/java/app/pwhs/universalinstaller/presentation/install/dialog/DialogInstallStages.kt

@@ -275,6 +275,7 @@ fun DialogFailedContent(
     errorMessage: String,
     onClose: () -> Unit,
     onRetry: (() -> Unit)? = null,
+    onFallbackInstall: (() -> Unit)? = null,
 ) {
     val context = androidx.compose.ui.platform.LocalContext.current
     val clipboard = androidx.compose.ui.platform.LocalClipboard.current
@@ -346,6 +347,16 @@ fun DialogFailedContent(
 
         Spacer(modifier = Modifier.height(12.dp))
 
+        if (onFallbackInstall != null) {
+            Button(
+                onClick = onFallbackInstall,
+                modifier = Modifier.fillMaxWidth(),
+            ) {
+                Text(stringResource(R.string.dialog_failed_fallback_install, "Install via System Installer"))
+            }
+            Spacer(modifier = Modifier.height(8.dp))
+        }
+
         if (onRetry != null) {
             Row(
                 modifier = Modifier.fillMaxWidth(),

app/src/main/res/values/strings.xml

@@ -550,6 +550,7 @@
     <string name="dialog_failed_title">Installation failed</string>
     <string name="dialog_failed_retry">Retry</string>
     <string name="dialog_failed_close">Close</string>
+    <string name="dialog_failed_fallback_install">Install via System Installer</string>
     <string name="dialog_version_downgrade">⚠ Downgrade: %1$s → %2$s</string>
     <string name="dialog_chip_downgrade">Downgrade</string>
     <string name="dialog_chip_split_apk">Split APK</string>