Copy number to another intent/app textbox

i am trying to copy a number (total sale) from my app to the credit card processing app that i am using (square). how could i do that? i am trying to use intents.

        chargeButton.setOnClickListener(new OnClickListener() {
        public void onClick(View h) {
            Intent intent = new Intent(Intent.ACTION_INSERT);
            intent.putExtra(Intent.ACTION_INSERT,          textResult.getText().toString() );
            intent开发者_如何学编程.setComponent(new ComponentName("com.squareup",
                    "com.squareup.ui.PaymentActivity"));
            startActivity(intent);

i have searched all over and the only answer i am getting involves the secound app .getextras which i cant add to an app that's not mine. please provide code if possible. thanks for your help.

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there is no way to use square without installing squareup on device

download helper library here

use code from here to make your payment