Two ways: 1. Implement ActionListener in your class, then use jBtnSelection.addActionListener(this); Later, you’ll have to define a menthod, public void actionPerformed(ActionEvent e). However, doing this for multiple buttons can be confusing, because the actionPerformed method will have to check the source of each event (e.getSource()) to see which button it came from. 2. Use anonymous … Read more
If you want to create a CustomButtonUI then you have to look deepest to the BasicXxxUI. overide List of Colors from JButton Note there isn’t paintComponent(). It’s wrong, just use the paint() method, Below is just a simple example if that is possible (for Metal JButton). Note just for Metal LaF, I’m so lazy and … Read more
If you don’t want multiple line, for you edittext you can just specify a single line. For the edittext and also you can put imeOptions as Done like this: <EditText android:id=”@+id/edittext_done” android:layout_width=”fill_parent” android:layout_height=”wrap_content” android:imeOptions=”actionDone” android:singleLine=”true” /> I clearly don’t know, whether you are trying to achieve this or not.Any way take a look. EDIT: android:singleLine … Read more
In terms of performance, the number of elements the event is bound to is where you’d see any issues. Here is a jsperf test. You’ll see that binding to many elements is much slower, even though only one event is being bound in each case. The 3rd test in the jsperf shows how you’d bind … Read more
Switch s = (Switch) findViewById(R.id.SwitchID); if (s != null) { s.setOnCheckedChangeListener(this); } /* … */ public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) { Toast.makeText(this, “The Switch is ” + (isChecked ? “on” : “off”), Toast.LENGTH_SHORT).show(); if(isChecked) { //do stuff when Switch is ON } else { //do stuff when Switch if OFF } } Hint: isChecked … Read more
Both ItemListener as well as ActionListener, in case of JCheckBox have the same behaviour. However, major difference is ItemListener can be triggered by calling the setSelected(true) on the checkbox. As a coding practice do not register both ItemListener as well as ActionListener with the JCheckBox, in order to avoid inconsistency.
actionListener Use actionListener if you want have a hook before the real business action get executed, e.g. to log it, and/or to set an additional property (by <f:setPropertyActionListener>), and/or to have access to the component which invoked the action (which is available by ActionEvent argument). So, purely for preparing purposes before the real business action … Read more