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 resources folder should be install,
Heres something I have done :

public void onClick(View v) {
    // Intent intent = new Intent("com.google.zxing.client.android.SCAN");
    // intent.setPackage("com.google.zxing.client.android");
    // intent.putExtra("SCAN_MODE", "QR_CODE_MODE");
    // startActivityForResult(intent, 0);
    File file = new File("android.resource://com.app.barcodescanner/raw", "scan.apk");
    Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setDataAndType(Uri.fromFile(file), "application/vnd.android.package-archive");
    startActivity(intent);
}

any ideas ?
please help me with this

Answer 1

Intent intent = new Intent(Intent.ACTION_VIEW);
    intent.setDataAndType(Uri.fromFile(new File
            (Environment.getExternalStorageDirectory()  + "/barcode.apk")), "application/vnd.android.package-archive");
    startActivity(intent);

Answer 2

It probably will not work with an android.resource Uri. Try copying the APK out to external storage and doing the install from there.