how to install app from android phone programmatically 1

how to install app from android phone programmatically

public boolean installPackage(Context context,
                                     String packageName, String packagePath) {
    ComponentName name = new ComponentName(MyAppName, MyDeviceAdminReceiver.class.getCanonicalName());
    PackageManager packageManger = context.getPackageManager();
    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP) {
        PackageInstaller packageInstaller = packageManger.getPackageInstaller();
        PackageInstaller.SessionParams params = new PackageInstaller.SessionParams(
                PackageInstaller.SessionParams.MODE_FULL_INSTALL);
        params.setAppPackageName(packageName);
        try {
            int sessionId = packageInstaller.createSession(params);
            PackageInstaller.Session session = packageInstaller.openSession(sessionId);
            OutputStream out = session.openWrite(packageName + ".apk", 0, -1);
            readTo(packagePath, out); //read the apk content and write it to out
            session.fsync(out);
            out.close();
            System.out.println("installing...");
            session.commit(PendingIntent.getBroadcast(context, sessionId,
                    new Intent("android.intent.action.MAIN"), 0).getIntentSender());
            System.out.println("install request sent");
            return true;
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
    }
    System.err.println("old sdk");
    return false;
}

Here is what the above code is Doing:
1. Create a new session with the package installer.
2. Open a write session to the package installer.
3. Read the apk content and write it to the write session.
4. Commit the session.
5. Return true if the installation was successful.

The above code is working fine on Android 5.0 and above.

The problem is that the above code is not working on Android 4.4.2.

I have tried the following:
1. I have tried to use the PackageInstaller.Session.openRead() method instead of openWrite() but it didn’t work.
2. I have tried to use the PackageInstaller.Session.write() method instead of openWrite() but it didn’t work.
3. I have tried to use the PackageInstaller.Session.fsync() method instead of openWrite() but it didn’t work.
4. I have tried to use the PackageInstaller.Session.abandon() method instead of openWrite() but it didn’t work.
5. I have tried to use the PackageInstaller.Session.close() method instead of openWrite() but it didn’t work.
6. I have tried to use the PackageInstaller.Session.commit() method instead of openWrite() but it didn’t work.
7. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
8. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
9. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
10. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
11. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
12. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
13. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
14. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
15. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
16. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
17. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
18. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
19. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
20. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
21. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
22. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
23. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.
24. I have tried to use the PackageInstaller.Session.transfer() method instead of openWrite() but it didn’t work.

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