how to install apk file programmatically

Question

I want to install an apk file from my application.

I have created an app that contains a button, when I click that button then another apk that I have stored in res

Answer 1

public void onCreate(Bundle savedInstanceState)
{
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    File DbFile=new File("mnt/sdcard/HelloAndroid.apk");
    if(!(DbFile.exists()))
    {
        try
        {
            int length = 0;
            DbFile.createNewFile();
            InputStream inputStream = this.getAssets().open("HelloAndroid.apk");
            FileOutputStream fOutputStream = new FileOutputStream(DbFile);
            byte[] buffer = new byte[inputStream.available()];
            while ((length = inputStream.read(buffer)) > 0)
            {
                fOutputStream.write(buffer, 0, length);
            }
            fOutputStream.flush();
            fOutputStream.close();
            inputStream.close();
        }
        catch (Exception ex)
        {
            System.out.println("Error in creating new database at mobile..." + ex);
            ex.printStackTrace();
        }
    }

    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setDataAndType(Uri.fromFile(new File("/mnt/sdcard/HelloAndroid.apk")), "application/vnd.android.package-archive");
    startActivity(intent);
}

Here i have stored my apk file in assets folder. You can try this.