Function injectGadget

src/tools/frida.ts:269–392

(
        apktoolYmlUri: vscode.Uri,
    )

     * - Patches main activity's smali to load the gadget
     */
    export async function injectGadget(
        apktoolYmlUri: vscode.Uri,
    ): Promise<void> {
        const projectDir = path.dirname(apktoolYmlUri.fsPath);

        // Ask user for gadget .so path
        const gadgetFiles = await vscode.window.showOpenDialog({
            canSelectMany: false,
            openLabel: "Select Frida Gadget .so",
            filters: { "Shared Library": ["so"] },
        });
        if (!gadgetFiles || gadgetFiles.length === 0) return;

        const gadgetSoPath = gadgetFiles[0].fsPath;

        // Detect arch from ELF header, fall back to filename
        const detectedArch = detectArch(gadgetSoPath);
        const archOptions = ["arm64-v8a", "armeabi-v7a", "x86", "x86_64"];
        if (detectedArch && archOptions.includes(detectedArch)) {
            archOptions.splice(archOptions.indexOf(detectedArch), 1);
            archOptions.unshift(detectedArch);
        }
        const selectedArch = await vscode.window.showQuickPick(archOptions, {
            placeHolder: detectedArch
                ? `Detected: ${detectedArch} — confirm or pick another`
                : "Select target architecture",
            canPickMany: false,
        });
        if (!selectedArch) return;

        // Find main activity
        const manifestPath = path.join(projectDir, "AndroidManifest.xml");
        if (!fs.existsSync(manifestPath)) {
            vscode.window.showErrorMessage(
                "APKLab: AndroidManifest.xml not found in project.",
            );
            return;
        }

        const mainActivityClass = findMainActivity(manifestPath);
        if (!mainActivityClass) {
            vscode.window.showErrorMessage(
                "APKLab: Could not find main/launcher activity in AndroidManifest.xml.",
            );
            return;
        }

        outputChannel.appendLine(
            `Frida Gadget: Main activity is ${mainActivityClass}`,
        );

        // Generate random library name to avoid detection
        const gadgetBaseName = generateGadgetName();
        const libName = `lib${gadgetBaseName}.so`;

        // 1. Copy gadget .so with random name to lib/<arch>/
        const libDir = path.join(projectDir, "lib", selectedArch);
        if (!fs.existsSync(libDir)) {