TextView长按复制-粘贴

textview.setOnLongClickListener(new View.OnLongClickListener() {
@Override
public boolean onLongClick(View v) {

                    ClipboardManager cmb = (ClipboardManager)context.getSystemService(Context.CLIPBOARD_SERVICE);                    cmb.setText(textview.getText());                    ToastUtil.show("已复制");                    return false;                }            });