How to install/update/remove APK using “PackageInstaller” class in Android L?

Question

Plz check below classe & give me the suggestion for how to use them https://developer.android.com/reference/android/content/pm/PackageInstaller.html https://developer.an

Answer 1

In Android Api-21 below is code snippet via which we can install apk silently.

private void runInstallWrite() throws IOException, RemoteException {
        long sizeBytes = -1;

        String opt;
        while ((opt = nextOption()) != null) {
            if (opt.equals("-S")) {
                sizeBytes = Long.parseLong(nextOptionData());
            } else {
                throw new IllegalArgumentException("Unknown option: " + opt);
            }
        }

        final int sessionId = Integer.parseInt(nextArg());
        final String splitName = nextArg();

        String path = nextArg();
        if ("-".equals(path)) {
            path = null;
        } else if (path != null) {
            final File file = new File(path);
            if (file.isFile()) {
                sizeBytes = file.length();
            }
        }

        final SessionInfo info = mInstaller.getSessionInfo(sessionId);

        PackageInstaller.Session session = null;
        InputStream in = null;
        OutputStream out = null;
        try {
            session = new PackageInstaller.Session(mInstaller.openSession(sessionId));

            if (path != null) {
                in = new FileInputStream(path);
            } else {
                in = new SizedInputStream(System.in, sizeBytes);
            }
            out = session.openWrite(splitName, 0, sizeBytes);

            int total = 0;
            byte[] buffer = new byte[65536];
            int c;
            while ((c = in.read(buffer)) != -1) {
                total += c;
                out.write(buffer, 0, c);

                if (info.sizeBytes > 0) {
                    final float fraction = ((float) c / (float) info.sizeBytes);
                    session.addProgress(fraction);
                }
            }
            session.fsync(out);

            System.out.println("Success: streamed " + total + " bytes");
        } finally {
            IoUtils.closeQuietly(out);
            IoUtils.closeQuietly(in);
            IoUtils.closeQuietly(session);
        }
    }

The above code is been took from Framework here

Can i use this code with device_owner or normal user in LoLiipop ?

Answer - No Since there are apis which is been @hide tag in android frameworks, although PackageManager.Session is introduced in API 21 but we cannot use new PAckageManager.Session() since it @hide in API 21.

If you wanna still use this code via framework.jar , you need to build Lolippop source code and extract jar from out/..../framework.jar and call above apis.