在ImageButton上添加文字

在ImageButton上面添加文字，可重写Switch

public class CustomerSwitch extends Switch {
    private String s1 ;
    private String s2;

    private Context mContext;
    public CustomerSwitch(Context context, AttributeSet attrs) {
        super(context, attrs);
        mContext = context;
        s1 = getResources().getString(R.string.switch_1);
        s2 = getResources().getString(R.string.switch_2);
        this.setSwitchTextAppearance(mContext, R.style.switch_textColor);
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        Paint p = getPaint();
        p.setTextSize(20);
        p.setColor(Color.RED);
        if (!this.isChecked()) {
            canvas.drawText(s1, 3 * this.getMeasuredWidth() / 4 - p.measureText(s1) / 2, this.getBaseline(), p);
        } else {
            canvas.drawText(s2, this.getThumbTextPadding(), this.getBaseline(), p);
        }
        canvas.restore();
    }

}