关于按钮点击android

Question

I have an application in Android 2.3.3. There are few buttons in it. I want a functionality (for the buttons) similar to that of qwerty keyboard, where in when we press a key or a letter, that character will be shown for a fraction of a second, just above the place where that character is present in the keyboard.

Do we have any such kind of properties built in?

If there is no such thing, i am using a background color to my buttons and it's hard to get a note of whether the button is clicked or not. Can we somehow make it visible that the button is clicked.

Answer 1

Your looking for a selector somehting like this inside your drawable folder. To reference it just call it like a drawable.

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item android:state_pressed="true" android:drawable="@drawable/buttonpressed" />
<item android:drawable="@drawable/buttonnotpressed" /> <!-- default -->
</selector>

Answer 2

well, it seems to me like you should try and create an XML file that describes the button different states instead of what you're currently doing.

if you still want to show the buttons layout as a popup when the button ius pressed, you should create a view and add it when intercepting the MotionEvent.ACTION_DOWN and remove it when intercepting the MotionEvent.ACTION_UP .

Answer 3

Use the below xml for UI button selection :

buttonselection.xml :

<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
<item android:state_focused="false" 
  android:state_selected="false" 
  android:state_pressed="false" 
  android:drawable="@drawable/image you want to display on page load"/> 
<item android:state_focused="false" 
  android:state_selected="true" 
  android:state_pressed="false" 
  android:drawable="@drawable/image you want to display on selection"/> 
<item android:state_focused="true" 
  android:state_selected="false" 
  android:state_pressed="false" 
  android:drawable="@drawable/image you want to display on page load"/> 
<item android:state_focused="true" 
  android:state_selected="true" 
  android:state_pressed="false" 
  android:drawable="@drawable/image you want to display on selection"/> 
<item android:state_pressed="true" 
  android:drawable="@drawable/image you want to display on selection"/> 
</selector> 

and below is the code for binding with xml :

 public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.yourLayout);
   ImageButton btYourLayoutBtn = (ImageButton)findViewById(R.id.yourbuttonid);
  btYourLayoutBtn .setImageResource(R.drawable.buttonselection);
  btYourLayoutBtn .setOnClickListener(this); 
}