自定义标题栏

主界面
public class MainActivity extends AppCompatActivity implements
 MyCustomActionBar.OnIconClickListener {

    private MyCustomActionBar myCustomActionBar;

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        myCustomActionBar = (MyCustomActionBar) findViewById(R.id.my_action_bar);
        myCustomActionBar.SetOnIconClickListener(this);
    }

    @Override
    public void OnIconClick(View icon) {
        startActivity(new Intent(this,SecondActivity.class));
    }
}
跳转到第二个界面：
public class SecondActivity extends AppCompatActivity implements MyCustomActionBar.OnIconClickListener {
    private MyCustomActionBar myCustomActionBar;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.second);
        myCustomActionBar = (MyCustomActionBar) findViewById(R.id.my_action_bar);
        myCustomActionBar.SetOnIconClickListener(this);
    }

    @Override
    public void OnIconClick(View icon) {
        finish();
    }
}
自定义类：
public class MyCustomActionBar extends LinearLayout {

    private RelativeLayout relativeLayout;
    private TextView biaoti;
    private ImageView img;
    private TypedArray typedArray;
    private int bgcolor;
    private int textcolor;
    private float size;
    private String text;
    private Drawable drawable;

    public MyCustomActionBar(Context context) {
        super(context);
        initView(context, null);
    }

    public MyCustomActionBar(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        initView(context, attrs);
    }

    private void initView(Context context, AttributeSet attrs) {
        View inflate = inflate(context, R.layout.my_action_bar_layout, this);
        relativeLayout = (RelativeLayout) inflate.findViewById(R.id.container);
        biaoti = (TextView) inflate.findViewById(R.id.biaoti);
        img = (ImageView) inflate.findViewById(R.id.img);
        img.setOnClickListener(new OnClickListener() {
            @Override
            public void onClick(View v) {
                if(mOnIconClickListener != null){
                    mOnIconClickListener.OnIconClick(v);
                }
            }
        });
        if (attrs == null) {
            return;
        }
        initAttrs(context,attrs);
        setViewContent();
    }

    private void initAttrs(Context context, AttributeSet attrs) {
        if (attrs == null) {
            return;
        }
     typedArray = context.obtainStyledAttributes(attrs, R.styleable.MyCustomActionBar);
 bgcolor = typedArray.getColor(R.styleable.MyCustomActionBar_action_bar_bg_color, Color.GRAY);
 textcolor = typedArray.getColor(R.styleable.MyCustomActionBar_action_bar_title_text_color, Color.RED);
        size = typedArray.getDimension(R.styleable.MyCustomActionBar_action_bar_title_text_size, 16);
        text = typedArray.getString(R.styleable.MyCustomActionBar_action_bar_title_text);
        drawable = typedArray.getDrawable(R.styleable.MyCustomActionBar_action_bar_icon_src);
    }
    public void setViewContent(){
        relativeLayout.setBackgroundColor(bgcolor);
        img.setImageDrawable(drawable);
        biaoti.setText(text);
        biaoti.setTextColor(textcolor);
        biaoti.setTextSize(size);
    }
    private OnIconClickListener mOnIconClickListener;

    public interface OnIconClickListener {
        void OnIconClick(View icon);
    }
 public void SetOnIconClickListener(OnIconClickListener onIconClickListener) {
        mOnIconClickListener = onIconClickListener;
    }
}
attrs:
<?xml version="1.0" encoding="utf-8"?>
<resources>
    <declare-styleable name="MyCustomActionBar">
        <attr name="action_bar_bg_color" format="color" />
        <attr name="action_bar_title_text_color" format="color" />
        <attr name="action_bar_title_text_size" format="dimension" />
        <attr name="action_bar_title_text" format="string" />
        <attr name="action_bar_icon_src" format="reference" />
    </declare-styleable>
</resources>
自定义布局文件：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="80dp"
    android:background="@color/colorAccent">
    <ImageView
        android:layout_marginLeft="12dp"
        android:id="@+id/img"
        android:layout_width="60dp"
        android:layout_height="60dp"
        android:layout_centerVertical="true"
        android:src="@mipmap/ic_launcher" />
    <TextView
        android:id="@+id/biaoti"
        android:layout_width="wrap_content"
        android:layout_height="60dp"
        android:layout_centerInParent="true"
        android:layout_centerVertical="true"
        android:gravity="center"
        android:src="@mipmap/ic_launcher"
        android:text="标题" />
</RelativeLayout>
主界面布局文件：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="com.fairy.day03.MainActivity">
<com.fairy.day03.MyCustomActionBar
    android:id="@+id/my_action_bar"
    android:layout_width="match_parent"
    android:layout_height="80dp"
    app:action_bar_bg_color="@color/colorAccent"
    app:action_bar_icon_src="@drawable/brad_pitt"
    app:action_bar_title_text="MainActivity"
    app:action_bar_title_text_color="@color/colorPrimaryDark"
    app:action_bar_title_text_size="16dp" >
</com.fairy.day03.MyCustomActionBar>
</RelativeLayout>