Android定制属于你自己的导航栏(2)

然后我们再重新写一个类继承于LineaLayour。通过在构造方法中去加载这个布局文件，这样就能实现一个组合控件的定义了，这样的方式是不是特别简单。

public class UINavigationView2 extends LinearLayout {

private Button btn_left;
 private Button btn_right;
 private TextView tv_title;

public UINavigationView2(Context context) {
  super(context);
  // TODO Auto-generated constructor stub
 }

public UINavigationView2(Context context, AttributeSet attrs) {
  super(context, attrs);

LayoutInflater layoutInflater = (LayoutInflater) context
    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
  layoutInflater.inflate(R.layout.title_bar, null);
  btn_left = (Button) findViewById(R.id.btn_left);
  btn_right = (Button) findViewById(R.id.btn_right);
  tv_title = (Button) findViewById(R.id.tv_title);

}

public void setBtnLeftBacground(int resId) {

if (btn_left != null) {
   btn_left.setBackgroundResource(resId);
  }
 }

public void setBtnRightBacground(int resId) {
  if (btn_right != null) {
   btn_right.setBackgroundResource(resId);
  }

}

public void setTvTitle(int resId) {
  if (tv_title != null) {
   tv_title.setText(resId);
  }
 }

public Button getBtn_left() {
  return btn_left;
 }

public Button getBtn_right() {
  return btn_right;
 }

public TextView getTv_title() {
  return tv_title;
 }

}