前言：

相信大家都用过ActionBar吧，基本上都会去继承AppCompactActivity，但是在某些情况下，想实现一些特殊的效果的时候，系统自带的ActionBar就显得有点儿鸡肋了，不过后面又出了ToolBar控件，大大的弥补了ActionBar的不足，所以本次的自定义ActionBar就是继承的ToolBar，从而实现了ActionBar的高度以及可显示内容的高度定制。

下面列举几种自定义的样式：

1、自定义左侧返回菜单，使用方法见代码：
<pre>
private MyActionBar actionBar;
actionBar = (MyActionBar) findViewById(R.id.myactionbar);
actionBar.withTitle("分类目录") //设置title文字
.setABCallBack(this) // 设置左侧返回按钮，中间自定义菜单及右侧按钮点击事件
.isShowBack(false) //是否显示左侧返回菜单
//效果见下图：

</pre>

2、自定义ActionBar中间的view

<pre>
private MyActionBar actionBar;
actionBar = (MyActionBar) findViewById(R.id.myactionbar);
//自定义中间的view。
View view = getLayoutInflater().inflate(R.layout.actionbar_center, null);
view.findViewById(R.id.btn_click).setOnClickListener(v -> Toast.makeText(getApplicationContext(), "id:" + ((Button) v.findViewById(R.id.btn_click)).getText(), Toast.LENGTH_SHORT).show());
actionBar.setABCallBack(this) // 设置左侧返回按钮，中间自定义菜单及右侧按钮点击事件
.isShowBack(false) //是否显示左侧返回菜单
.addCenterView(view); //添加自定义view 见图二TEST按钮
//效果见下图：

</pre>

3、自定义右侧按钮点击事件

<pre>
private MyActionBar actionBar;
actionBar = (MyActionBar) findViewById(R.id.myactionbar);
//右侧item adapter
List<MyPopupWindow.MenuEntity> menuEntities = new ArrayList<>();
menuEntities.add(new MyPopupWindow.MenuEntity(R.drawable.titlebar_back_press, "name"));
menuEntities.add(new MyPopupWindow.MenuEntity(R.drawable.titlebar_back_press, "name1"));
menuEntities.add(new MyPopupWindow.MenuEntity(R.drawable.titlebar_back_press, "name2"));

actionBar.setABCallBack(this) // 设置左侧返回按钮，中间自定义菜单及右侧按钮点击事件
.isShowBack(false) //是否显示左侧返回菜单
.addMenuList(menuEntities) // 添加右侧按钮item
.addCenterView(view); //添加自定义view
//效果见下图：
</pre>

MyActionBar 源码：

<pre>
public class MyActionBar extends Toolbar {

private int backColor;
private int defaultColor;
private TextView tvTitle;
private ImageView ivBack, ivRight;
private RelativeLayout llBackground;
private AbCallBack abCallBack;
private Context mContext;
private LinearLayout llcontainer;
private MyPopupWindow popupWindow;

public MyActionBar(Context context) {
    super(context, null);

}

public MyActionBar(Context context, final AttributeSet attrs) {
    this(context, attrs, -1);
}

@TargetApi(Build.VERSION_CODES.M)
public MyActionBar(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    this.mContext = context;
    defaultColor = context.getColor(R.color.colorPrimary);
    LayoutInflater.from(context).inflate(R.layout.actionbar, this, true);
    TypedArray typedArray = context.obtainStyledAttributes(attrs,
            R.styleable.MyActionBar, 0, 0);
    backColor = typedArray.getColor(R.styleable.MyActionBar_myactionbar_background, defaultColor);
    llBackground = (RelativeLayout) findViewById(R.id.ll_background);
    llBackground.setBackgroundColor(backColor);
    llcontainer = (LinearLayout) findViewById(R.id.ll_container);
    tvTitle = (TextView) findViewById(R.id.tv_title);
    ivBack = (ImageView) findViewById(R.id.iv_back);
    ivRight = (ImageView) findViewById(R.id.iv_right);
    ivBack.setColorFilter(getResources().getColor(R.color.white));
    ivBack.setOnClickListener(v -> abCallBack.onBackClick());
    ivRight.setColorFilter(getResources().getColor(R.color.white));
    ivRight.setOnClickListener(v -> popupWindow.show(this));
}

public MyActionBar addCenterView(View view) {
    if (llcontainer != null) {
        llcontainer.removeAllViews();
        llcontainer.addView(view);
    }
    return this;
}

public MyActionBar addCenterViewClickListener(View view) {
    abCallBack.onCenterViewClick(view);
    return this;
}

public MyActionBar setHomeIcon(int resId) {
    if (mContext != null) {
        Picasso.with(mContext)
                .load(resId)
                .error(R.drawable.titlebar_back_press)
                .into(ivBack);
    }
    return this;
}


public MyActionBar isShowBack(boolean isShow) {
    if (!isShow) {
        ivBack.setVisibility(INVISIBLE);
    } else {
        ivBack.setVisibility(VISIBLE);
    }
    return this;
}

public MyActionBar addMenuList(List<MyPopupWindow.MenuEntity> menuEntityList) {
    popupWindow = new MyPopupWindow(mContext);
    popupWindow.addMenuList(menuEntityList)
            .addOnItemClickLisenter((parent, view, position, id) -> {
                abCallBack.onRightClick(position);
                popupWindow.dismiss();
            }).build();

    return this;
}

public MyActionBar setABCallBack(AbCallBack abCallBack) {
    this.abCallBack = abCallBack;
    return this;
}

public MyActionBar withTitle(String title) {
    tvTitle.setText(title);
    return this;
}

}
</pre>

AbCallBack （ActionBar点击事件回调）源码：
<pre>
public interface AbCallBack {
void onBackClick();
void onRightClick();
}
</pre>

更多使用方法详见github:

github : https://github.com/momentslz/openobj