Android Custom Universal TitleBar

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:andro
 android:
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:orientation="horizontal">
 <ImageView
  android:
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:src="@drawable/z"/>
 <LinearLayout
  android:layout_width="wrap_content"
  android:layout_height="match_parent"
  android:layout_weight="1">
  <TextView
   android:
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_weight="1"
   android:text="tvTitle"/>
  <TextView
   android:
   android:layout_width="match_parent"
   android:layout_height="wrap_content"
   android:layout_weight="1"
   android:text="tvRight"/>
 </LinearLayout>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
 <resources>
 <declare-styleable name="CustomerTitleBar">
  <attr name="left_image" format="reference"></attr>
  <attr name="center_text" format="string"></attr>
  <attr name="center_text_color" format="color"></attr>
  <attr name="center_text_size" format="dimension"></attr>
 </declare-styleable>
 </resources>

public class CustomerTitleBar extends LinearLayout {
private LinearLayout rootView;
private ImageView ivLeft;
private TextView tvTitle;
private TextView tvRight;
//3. Declare the callback objectprivate CustomerClick leftClick;

/**
 * @param context
 */
//When you directly new a Custom View instance in the code, the first constructor will be calledpublic CustomerTitleBar(Context context) {
 this(context,null);
}

//When calling Custom View in the xml layout file, the second constructor will be calledpublic CustomerTitleBar(Context context,AttributeSet attrs) {
 this(context, attrs,-1);
}

//When you call Custom View in the xml layout file and there are custom properties in the Custom View tag, the second constructor is called here.public CustomerTitleBar(Context context,AttributeSet attrs, int defStyleAttr) {
 super(context, attrs, defStyleAttr);
 init(context);
 initAttrs(context,attrs);
 initLister();
}

private void init(Context context) {
 rootView= (LinearLayout) (context,.layout_customer_title_bar,this);
 ivLeft=();
 tvTitle=();
 tvRight=();
}

private void initAttrs(Context context, AttributeSet attrs) {
 TypedArray typedArray=(attrs,);
 Drawable drawable=(.CustomerTitleBar_left_image);
 if (drawable!=null){
  (drawable);
 }
 CharSequence text = (.CustomerTitleBar_center_text);
 if (!(text)) {
  (text);
 }
 int color = (.CustomerTitleBar_center_text_color, -1);

 if (color != -1) {
  (color);
 }

 float dimension = (.CustomerTitleBar_center_text_size, 0f);

 (dimension);
}

private void initLister() {
 (new OnClickListener() {
  @Override
  public void onClick(View v) {
   //5. Use interface callback   if (leftClick!=null){
    (v);
   }
  }
 });
}
//4. Provide a set method for callback objectpublic void setLeftClick(CustomerClick leftClick) {
  = leftClick;
}
//1. Define the callback interfaceinterface CustomerClick{
 void onLefClick(View view);
}
}

<
 android:
 android:layout_width="match_parent"
 android:layout_height="wrap_content"
 android:gravity="center"
 customer:center_text="Bubble"
 customer:center_text_color="#ff00ff"
 customer:center_text_size="20sp" />

public class MainActivity extends AppCompatActivity {
 private CustomerTitleBar ctTitle;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  (savedInstanceState);
  setContentView(.activity_main);
  ctTitle=findViewById();
  //6. Use  (new () {
   @Override
   public void onLefClick(View view) {
    (,"Bubble",Toast.LENGTH_LONG).show();
   }
  });
}
}