打造一个通用的TitleBar

虽然google先后出了ActionBar,Toolbar等各种bar,但实际开发中产品的设计很多时候还是ios化,一方面让这些官方控件无用武之地,另一方面这些各种bar还是存在着局限性,用起来不是很方便,所以我们这里自己打造一个通用的TitleBar,基本上能满足日常开发中的大部分需求。

先分析下我们日常开发中经常用到的TitleBar有哪些样式:

文字形菜单按钮

左右按钮都是文字


打造一个通用的TitleBar_第1张图片
左右文字.jpg
图标形菜单按钮

左右按钮都是图标Icon


打造一个通用的TitleBar_第2张图片
左右图标.jpg
图文混排行菜单按钮

按钮为图片加文字的排列方式


打造一个通用的TitleBar_第3张图片
图文混排.jpg
多图标形菜单按钮

有多个图标按钮


打造一个通用的TitleBar_第4张图片
多图标.jpg

以上这些基本上能涵盖日常开发中的大部分需求,当然如果cover不到也可以在本文的基础上添加自定义需求,这里主要讲一下封装思想。

首先,我们写一个TitleBar的布局,这个很easy,直接上代码:





    

    

    



左中右三个控件我们都采用TextView,布局采用相对布局。对于适配第一种样式,左按钮右按钮都是文本的样式就很简单了;关键是我们的TextView怎么去兼容ImageView。TextView有个属性:drawRight,这个时候如果文本为"",那么drawRight就只剩下图片而没有文本了,那么我就完美适配了第二种样式;那第三种样式图片加文本的显示方式,我们仍然采用这种方案,水到渠成;第四种显示方式主要是右边有两个图片,这样我们仍然把文本设置为"",然后分别设置drawLeft,drawRight,这样就有两张图片了。

完美,通过上面的分析,我们把这几种显示样式的TitleBar都完美适配了,但是但是,有个问题,第四种样式右边的两个图标的点击事件怎么获取,TextView对于drawLeft和drawRight的图片并没有提供点击监听,怎么破?没有提供,我们就自己实现吧,我们计算好触摸位置,然后拦截ACTION_UP事件,就能完美解决问题。于是,对于这种右按钮有两个图标的样式,我们还要先自定义一个TextView来解决点击事件分发的事。代码如下:


public class CustomTextView extends android.support.v7.widget.AppCompatTextView {

    private DrawableLeftListener mLeftListener;
    private DrawableRightListener mRightListener;

    final int DRAWABLE_LEFT = 0;
    final int DRAWABLE_TOP = 1;
    final int DRAWABLE_RIGHT = 2;
    final int DRAWABLE_BOTTOM = 3;

    public CustomTextView(Context context) {
        super(context);
    }

    public CustomTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public CustomTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    public void setDrawableLeftListener(DrawableLeftListener listener) {
        this.mLeftListener = listener;
    }

    public void setDrawableRightListener(DrawableRightListener listener) {
        this.mRightListener = listener;
    }

    public interface DrawableLeftListener {
         void onDrawableLeftClick(View view);
    }

    public interface DrawableRightListener {
         void onDrawableRightClick(View view);
    }

    @Override
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_UP:
                if (mRightListener != null) {
                    Drawable drawableRight = getCompoundDrawables()[DRAWABLE_RIGHT];
                    if (drawableRight != null && event.getRawX() >= (getRight() - drawableRight.getBounds().width())) {
                        mRightListener.onDrawableRightClick(this);
                        return true;
                    }
                }
                if (mLeftListener != null) {
                    Drawable drawableLeft = getCompoundDrawables()[DRAWABLE_LEFT];
                    if (drawableLeft != null && event.getRawX() <= (getLeft() + drawableLeft.getBounds().width()))
                        mLeftListener.onDrawableLeftClick(this);
                    return true;
                }
                break;
        }
        return super.onTouchEvent(event);
    }
}

同样上面布局中的


 

要替换成

 

好了,方案上我们算是基本走通了,下面就是自定义一个TittleBar,暴露一些接口API和属性,供调用的地方设置属性。然后我们再分析下这个TitleBar有哪些属性可以设置:
1:左按钮文本(图片)
2:右按钮文本(图片)
3:中间Title

4:左按钮文本颜色
5:右按钮文本颜色
6:中间Title颜色

7:左按钮文字大小
8:右按钮文字大小
9:中间Title颜色

总结下来基本就是图片,文字,文字大小,文字颜色,当然还有一个最重要的:点击事件。这里先加这么多,当然有更多需求,都可以在此基础上加。所以,基于上面的分析,我们写出了CustomTitleBar:


public class CustomTitleBar extends RelativeLayout implements View.OnClickListener {


    private String leftTitle;
    private String middleTitle;
    private String rightTitle;

    private int leftTextColor;
    private int middleTextColor;
    private int rightTextColor;

    private float leftTextSize;
    private float rightTextSize;
    private float middleTextSize;

    private TextView tvLeft;
    private TextView tvMiddle;
    private CustomTextView tvRight;

    private int leftImage;
    private int rightImage;
    private int rightImage2;

    private TitleClickListener listener;

    public CustomTitleBar(Context context) {
        this(context, null);
    }

    public CustomTitleBar(Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public CustomTitleBar(Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.CustomTitleBar, defStyleAttr, 0);
        initView(array);
        array.recycle();
    }

    private void initView(TypedArray array) {

        LayoutInflater.from(getContext()).inflate(R.layout.titlebar_layout, this);

        tvLeft = (TextView) findViewById(R.id.tvLeftTitle);
        tvLeft.setOnClickListener(this);
        tvMiddle = (TextView) findViewById(R.id.tvMiddleTitle);
        tvMiddle.setOnClickListener(this);
        tvRight = (CustomTextView) findViewById(R.id.tvRightTitle);
        tvRight.setOnClickListener(this);


        leftTitle = array.getString(R.styleable.CustomTitleBar_leftTitle);
        middleTitle = array.getString(R.styleable.CustomTitleBar_middleTitle);
        rightTitle = array.getString(R.styleable.CustomTitleBar_rightTitle);

        leftTextColor = array.getColor(R.styleable.CustomTitleBar_leftTextColor, Color.GRAY);
        middleTextColor = array.getColor(R.styleable.CustomTitleBar_middleTextColor, Color.TRANSPARENT);
        rightTextColor = array.getColor(R.styleable.CustomTitleBar_rightTextColor, Color.GRAY);

        leftImage = array.getResourceId(R.styleable.CustomTitleBar_leftImage, 0);
        rightImage = array.getResourceId(R.styleable.CustomTitleBar_rightImage, 0);
        rightImage2 = array.getResourceId(R.styleable.CustomTitleBar_rightImage2, 0);


        leftTextSize = array.getDimension(R.styleable.CustomTitleBar_leftTextSize, DensityUtil.dip2px(getContext(), 15));
        rightTextSize = array.getDimension(R.styleable.CustomTitleBar_rightTextSize, DensityUtil.dip2px(getContext(), 17));
        middleTextSize = array.getDimension(R.styleable.CustomTitleBar_middleTextSize, DensityUtil.dip2px(getContext(), 15));

        if (leftImage > 0) {
            setLeftImage(leftImage);
        } else {
            setLeftTitle(leftTitle);
        }

        if (rightImage > 0) {
            setRightImage(rightImage);
        } else {
            setRightTitle(rightTitle);
        }

        if (rightImage > 0 && rightImage2 > 0) {
            setRightImage(rightImage, rightImage2);
        }

        tvLeft.setTextSize(TypedValue.COMPLEX_UNIT_PX, leftTextSize);
        tvRight.setTextSize(TypedValue.COMPLEX_UNIT_PX, rightTextSize);
        tvMiddle.setTextSize(TypedValue.COMPLEX_UNIT_PX, middleTextSize);


        tvRight.setDrawableLeftListener(new CustomTextView.DrawableLeftListener() {
            @Override
            public void onDrawableLeftClick(View view) {
                listener.onRightButton1Click();
            }
        });
        tvRight.setDrawableRightListener(new CustomTextView.DrawableRightListener() {
            @Override
            public void onDrawableRightClick(View view) {
                listener.onRightButton2Click();
            }
        });

        setMiddleTitle(middleTitle);
        setLeftTextColor(leftTextColor);
        setMiddleTextColor(middleTextColor);
        setRightTextColor(rightTextColor);
    }

    /**
     * @param size 单位sp
     */
    public void setLeftTextSize(float size) {
        tvLeft.setTextSize(size);
    }

    /**
     * @param size 单位sp
     */
    public void setMiddleTextSize(float size) {
        tvMiddle.setTextSize(size);
    }

    /**
     * @param size 单位sp
     */
    public void setRightTextSize(float size) {
        tvRight.setTextSize(size);
    }

    public void setLeftTextColor(int color) {
        tvLeft.setTextColor(color);
    }

    public void setMiddleTextColor(int color) {
        tvMiddle.setTextColor(color);
    }

    public void setRightTextColor(int color) {
        tvRight.setTextColor(color);
    }


    public void setLeftTitle(String title) {
        tvLeft.setText(title);
    }

    public void setRightTitle(String title) {
        tvRight.setText(title);
    }


    public void setMiddleTitle(int titleId) {
        tvMiddle.setText(titleId);
    }

    public void setMiddleTitle(String title) {
        tvMiddle.setText(title);
    }

    public void setLeftImage(int leftImage) {

        setLeftTitle(leftTitle);
        Drawable drawable = getResources().getDrawable(leftImage);
        drawable.setBounds(0, 0, drawable.getMinimumWidth(), drawable.getMinimumHeight());
        tvLeft.setCompoundDrawablePadding(DensityUtil.dip2px(getContext(), 8));
        tvLeft.setCompoundDrawables(drawable, null, null, null);
    }


    public void setRightImage(int rightImage) {

        setRightTitle(rightTitle);
        Drawable drawable = getResources().getDrawable(rightImage);
        drawable.setBounds(0, 0, drawable.getMinimumWidth(), drawable.getMinimumHeight());
        tvRight.setCompoundDrawablePadding(DensityUtil.dip2px(getContext(), 8));
        tvRight.setCompoundDrawables(null, null, drawable, null);
    }


    public void setRightImage(int rightImage1, int rightImage2) {

        setRightTitle(rightTitle);
        Drawable drawable1 = getResources().getDrawable(rightImage1);
        Drawable drawable2 = getResources().getDrawable(rightImage2);
        drawable1.setBounds(0, 0, drawable1.getMinimumWidth(), drawable1.getMinimumHeight());
        drawable2.setBounds(0, 0, drawable2.getMinimumWidth(), drawable2.getMinimumHeight());
        tvRight.setCompoundDrawablePadding(DensityUtil.dip2px(getContext(), 8));
        tvRight.setCompoundDrawables(drawable1, null, drawable2, null);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.tvLeftTitle:
                if (listener != null) {
                    listener.onLeftClick();
                }
                break;
            case R.id.tvRightTitle:
                if (listener != null) {
                    listener.onRightClick();
                }
                break;
        }
    }

    public void setTitleClickListener(TitleClickListener listener) {
        this.listener = listener;
    }


    public interface TitleClickListener {

        void onLeftClick();

        void onRightClick();

        void onRightButton1Click();

        void onRightButton2Click();
    }

}

attrs.xml里是这么写的:




    
        
        
        

        
        
        

        
        
        

        
        
        

    


到这里我们已经完成了这个通用TitleBar的封装工作,下面我们就写个测试类来调用下,先上xml:





    


    


    

    


xml里我们只需要根据自己需要的样式来设置对应的属性就可以了,当然这些属性也可以在代码里设置,运行出来的效果是这样的:

打造一个通用的TitleBar_第5张图片
test

关于按钮的点击事件,只要在代码里调用setTitleClickListener即可

titleBar.setTitleClickListener(new CustomTitleBar.TitleClickListener() {
            @Override
            public void onLeftClick() {
                //左按钮
            }

            @Override
            public void onRightClick() {
                //右按钮
            }

            @Override
            public void onRightButton1Click() {
                //右边第一个按钮(右边俩按钮)
            }

            @Override
            public void onRightButton2Click() {
                //右边第一个按钮(右边俩按钮)
            }
        });

好了,这里主要还是提供一个思路,完整代码:GitHub

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