项目中通用的顶部标题和返回的TitleBar

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="48dp"
    android:background="@drawable/bg_top_bar" >

    <ImageView
        android:id="@+id/bar_back"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:scaleType="center"
        android:src="@drawable/btn_back_selector" />

    <TextView
        android:id="@+id/bar_title"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:layout_marginLeft="48dp"
        android:layout_marginRight="48dp"
        android:gravity="center"
        android:text="Title"
        android:textColor="#FFFFFFFF"
        android:textSize="24sp"
        android:textStyle="normal" />

    <TextView
        android:id="@+id/bar_action"
        android:layout_width="48dp"
        android:layout_height="48dp"
        android:layout_alignParentRight="true"
        android:layout_centerVertical="true"
        android:gravity="center"
        android:text="action"
        android:textColor="#FFFFFFFF"
        android:textSize="18sp"
        android:textStyle="normal"
        android:visibility="gone" />

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:drawable="@drawable/action_button_back_pressed" android:state_pressed="true"/>
    <item android:drawable="@drawable/action_button_back_normal"/>
</selector>

public class TitleBar extends RelativeLayout{
    
    private ImageView ivBack;
    
    private TextView tvTitle;
    
    private TextView tvAction;
    
    public TitleBar(Context context) {
        this(context,null);
    }

    public TitleBar(Context context, AttributeSet attrs) {
        super(context, attrs);
        
        View view = View.inflate(context, R.layout.title_bar_view, this);
        ivBack = (ImageView) view.findViewById(R.id.bar_back);
        tvTitle = (TextView) view.findViewById(R.id.bar_title);
        tvAction = (TextView) view.findViewById(R.id.bar_action);
    }

    public void setBackVisibility(boolean show) {
        ivBack.setVisibility(show ? View.VISIBLE : View.INVISIBLE);
    }

    public void setTitle(String title) {
        tvTitle.setText(title);
    }
    
    public ImageView getIvBack() {
        return ivBack;
    }

    public void setIvBack(ImageView ivBack) {
        this.ivBack = ivBack;
    }

    public TextView getTvTitle() {
        return tvTitle;
    }

    public void setTvTitle(TextView tvTitle) {
        this.tvTitle = tvTitle;
    }

    public TextView getTvAction() {
        return tvAction;
    }

    public void setTvAction(TextView tvAction) {
        this.tvAction = tvAction;
    }
}