I am developing a keyboard application for Android. I tried to set different background for normal key and function key but it didn't work:
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Functional keys. -->
<item android:state_single="true" android:state_pressed="true"
android:drawable="@drawable/btn_keyboard_special" />
<item android:state_single="true"
android:drawable="@drawable/btn_keyboard_special" />
<!-- Toggle keys. Use checkable/checked state. -->
<item android:state_checkable="true" android:state_checked="true" android:state_pressed="true"
android:drawable="@drawable/btn_keyboard_key_dark_pressed_on" />
<item android:state_checkable="true" android:state_pressed="true"
android:drawable="@drawable/btn_keyboard_key_dark_pressed_off" />
<item android:state_checkable="true" android:state_checked="true"
android:drawable="@drawable/btn_keyboard_key_dark_normal_on" />
<item android:state_checkable="true"
android:drawable="@drawable/btn_keyboard_key_dark_normal_off" />
<!-- Normal keys -->
<item android:state_pressed="true"
android:drawable="@drawable/glow" />
<item android:drawable="@drawable/btn_keyboard_key_light_normal" />
</selector>
There is a XML-Attribute called android:keyBackground. Just set this attribute to a drawable and it should be fine.
Add this attrbute to the KeyboardView in input.xml:
<KeyboardView android:keyBackground="@drawable/buttonbgselector" .../>
I'm assuming this is what you are using to assign background color for all the keys.
For the function keys alone, create a proper foreground drawable image to cover the entire key and assign it to keyIcon
in the xml of the keyboard layout xml.
To be perfect, use a background image that covers the same dimension also, incase you don't want to change the keyIcon
This hack work for me.
public class MyKeyboardView extends android.inputmethodservice.KeyboardView {
Context context;
public MyKeyboardView(Context context, AttributeSet attrs) {
super(context, attrs);
// TODO Auto-generated constructor stub
this.context = context ;
}
@Override
public void onDraw(Canvas canvas) {
super.onDraw(canvas);
Paint paint = new Paint();
paint.setTextAlign(Paint.Align.CENTER);
paint.setTextSize(25);
paint.setColor(Color.RED);
List<Key> keys = getKeyboard().getKeys();
for(Key key: keys) {
if(key.pressed){
NinePatchDrawable npd = (NinePatchDrawable)context.getResources().getDrawable(R.drawable.glow);
npd.setBounds(key.x,key.y,key.x+key.width,key.y+key.height);
npd.draw(canvas);
if(key.label != null)
canvas.drawText(key.label.toString(), key.x + (key.width/2), key.y + 25, paint);
}else if(key.modifier){ // boolean that defines key is function key
NinePatchDrawable npd = (NinePatchDrawable)context.getResources().getDrawable(R.drawable.btn_keyboard_special);
npd.setBounds(key.x,key.y,key.x+key.width,key.y+key.height);
npd.draw(canvas);
if(key.label != null)
canvas.drawText(key.label.toString(), key.x + (key.width/2), key.y + 25, paint);
}
break;
}
}
}
change your layout xml to
<com.example.yourpackage.MyKeyboardView
android:id="@+id/keyboardview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:focusable="true"
android:focusableInTouchMode="true"
android:visibility="gone"
android:background="#000000"
android:keyBackground="@drawable/keyboard_selector" />
You may write more conditions as per need in onDraw()
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