invisible

问题 I am trying to create an AlertDialog but the buttons are not showing. Only seeing this issue in Android 7.0: final AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("This app needs location access"); builder.setMessage("Please grant location access so this app can detect beacons."); builder.setPositiveButton(android.R.string.ok, null); builder.setOnDismissListener(new DialogInterface.OnDismissListener() { @Override @TargetApi(Build.VERSION_CODES.M) public void

问题 Hello I am trying to make an invisible button (still functional and clickable), because my buttons styles are embedded in the background and I don't want to slice them, and do it all from beginning. So I just want to make a button, put it on the part of the background where the button should be and make it invisible so the background button image can be seen and clicked. Any suggestions? Thank you very much! 回答1: you must use the following properties for a button element to make it

问题 I have designed one GUI in which I have used one JTable from which I have to make 2 columns invisible . How should I do that ? 回答1: Remove the TableColumn from the TableColumnModel . TableColumnModel tcm = table.getColumnModel(); tcm.removeColumn( tcm.getColumn(...) ); If you need access to the data then you use table.getModel().getValueAt(...) . For a more complex solution that allows the user to hide/show columns as they wish check out the Table Column Manager. 回答2: First remove the column