android自定义键盘与更改单个Keys的背景色

@Override

public void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    List keys = getKeyboard().getKeys();
    for (Key key : keys) {            
        if (key.codes[0] == 7) {
            Log.e("KEY", "Drawing key with code " + key.codes[0]);
            Drawable dr = (Drawable) context.getResources().getDrawable(R.drawable.red_tint);
            dr.setBounds(key.x, key.y, key.x + key.width, key.y + key.height);
            dr.draw(canvas);

        } else {
            Drawable dr = (Drawable) context.getResources().getDrawable(R.drawable.blue_tint);
            dr.setBounds(key.x, key.y, key.x + key.width, key.y + key.height);
            dr.draw(canvas);
        }            
    }
}







设置键盘Keys为图片。。

下面是纯手工画键盘。

@Override
public void onDraw(Canvas canvas) {
    // super.onDraw(canvas);

    List keys = getKeyboard().getKeys();
    for (Key key : keys) {
        if (key.codes[0] == 7) {
            NinePatchDrawable npd
                = (NinePatchDrawable) context.getResources().getDrawable(R.drawable.red_key);
            npd.setBounds(key.x, key.y, key.x + key.width, key.y + key.height);
            npd.draw(canvas);

        } else {
            NinePatchDrawable npd
                = (NinePatchDrawable) context.getResources().getDrawable(R.drawable.blue_key);
            npd.setBounds(key.x, key.y, key.x + key.width, key.y + key.height);
            npd.draw(canvas);
        }

        Paint paint = new Paint();
        paint.setTextAlign(Paint.Align.CENTER);
        paint.setTextSize(48);
        paint.setColor(Color.GRAY);

        if (key.label != null) {
            canvas.drawText(key.label.toString(), key.x + (key.width / 2),
                            key.y + (key.height / 2), paint);
        } else {
            key.icon.setBounds(key.x, key.y, key.x + key.width, key.y + key.height);
            key.icon.draw(canvas);
        }
    }
}