带头部可折叠的ListVivew

效果

使用

1.添加依赖

dependencies {    compile 'com.zgh.collapsiblelistview:collapsiblelistview:1.0.1'}

2.xml布局

    <com.zgh.collapsiblelistview.CollapsibleListView        android:id="@+id/clv_3"        android:layout_width="220dp"        android:layout_height="wrap_content"        android:layout_centerHorizontal="true"        android:layout_marginTop="20dp"        app:CollapsibleContentColor="#7CFBE1"        app:CollapsibleDuration="250"        app:CollapsibleHight="150dp"        app:CollapsibleTitle="列表三"        app:CollapsibleCornerRadius="10dp"        app:CollapsibleTitleTextColor="#000000"        app:CollapsibleTitleColor="#A4D2D2" />

3.设置adapter与点击事件

 ArrayAdapter<String> adapter;    CollapsibleListView clv_1,clv_2,clv_3;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        adapter=new ArrayAdapter<String>(this,R.layout.simple_list_item,new String[]{"Item1","Item2","Item3","Item4","Item5","Item6","Item7"});        clv_1= (CollapsibleListView) this.findViewById(R.id.clv_1);        clv_1.setAdapter(adapter);        clv_1.getListview().setOnItemClickListener(new MyOnItemClickListener("first"));    }    public  class MyOnItemClickListener implements AdapterView.OnItemClickListener{        String title;        public MyOnItemClickListener(String title){            this.title=title;        }        @Override        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {            Toast.makeText(MainActivity.this,title+" "+parent.getAdapter().getItem(position)+" click",Toast.LENGTH_SHORT).show();        }    }

属性

<?xml version="1.0" encoding="utf-8"?><resources>    <declare-styleable name="CollapsibleListView">        <!--标题-->        <attr name="CollapsibleTitle" format="string" />        <!--展开listview的高度-->        <attr name="CollapsibleHight" format="dimension" />        <!--展开时间-->        <attr name="CollapsibleDuration" format="integer" />        <!--标题布局颜色-->        <attr name="CollapsibleTitleColor" format="color" />        <!--内容布局颜色-->        <attr name="CollapsibleContentColor" format="color" />        <!--圆角-->        <attr name="CollapsibleCornerRadius" format="dimension" />        <!--标题文字颜色-->        <attr name="CollapsibleTitleTextColor" format="color" />    </declare-styleable></resources>

实现

实现的部分没有什么难度，主要讲两点，一个是折叠效果的实现，还有一个是背景的生成

1.折叠效果实现,

通过使用ValueAnimator在动画执行的时候，修改ListView的高度。

 ValueAnimator animatorOpen, animatorClose; private void initAnimator() {        animatorClose = creatAnimator(openHight, 0);        animatorOpen = creatAnimator(0, openHight);    } private ValueAnimator creatAnimator(int from, int hight) {        ValueAnimator animator = ValueAnimator.ofInt(from, hight);        animator.setDuration(openDuration);        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {            @Override            public void onAnimationUpdate(ValueAnimator animation) {                int h = (int) animation.getAnimatedValue();                ViewGroup.LayoutParams params = listview.getLayoutParams();                params.height = h;                listview.setLayoutParams(params);            }        });        animator.addListener(new AnimatorListenerAdapter() {            @Override            public void onAnimationCancel(Animator animation) {                isAnimatting = false;            }            @Override            public void onAnimationEnd(Animator animation) {                isOpen = !isOpen;                Drawable drawable = isOpen ? openDrawable : closeDrawable;                tv_title.setCompoundDrawables(null, null, drawable, null);                isAnimatting = false;            }            @Override            public void onAnimationStart(Animator animation) {                isAnimatting = true;            }        });        return animator;    }

2.背景生成

由于需要可定制圆角大小，所以不能单纯的直接设置布局的背景色，此处采用的是在解析完属性以后根据属性动态生成ShapeDrawable做完布局的背景

    private static final int DEFAULT_HEIGHT = 150;//dp    private static final int DEFAULT_DURATION = 500;//ms    private static final String DEFAULT_TITLE = "标题";    private static final int DEFAULT_TITLE_COLOR = Color.parseColor("#E14C60");    private static final int DEFAULT_CONTENT_COLOR = Color.parseColor("#C76C78");    private static final int DEFAULT_TITLE_TEXT_COLOR = Color.WHITE;    private static final int DEFAULT_CORNER_RADIUS = 10;    private Drawable openDrawable, closeDrawable;    private int titleColor;    private int contentColor;    private int cornerRadius = 5;    private int titleTextColor;  private void resolveAttrs(Context context, AttributeSet attrs) {        TypedArray array = context.obtainStyledAttributes(attrs, R.styleable.CollapsibleListView);        String title = array.getString(R.styleable.CollapsibleListView_CollapsibleTitle);        if (title == null) {            title = DEFAULT_TITLE;        }        mTitle = title;        openHight = (int) array.getDimension(R.styleable.CollapsibleListView_CollapsibleHight, dip2px(getContext(), DEFAULT_HEIGHT));        openDuration = array.getInt(R.styleable.CollapsibleListView_CollapsibleDuration, DEFAULT_DURATION);        if (openDuration < 0) {            openDuration = DEFAULT_DURATION;        }        titleColor = array.getColor(R.styleable.CollapsibleListView_CollapsibleTitleColor, DEFAULT_TITLE_COLOR);        contentColor = array.getColor(R.styleable.CollapsibleListView_CollapsibleContentColor, DEFAULT_CONTENT_COLOR);        cornerRadius = (int) array.getDimension(R.styleable.CollapsibleListView_CollapsibleCornerRadius, DEFAULT_CORNER_RADIUS);        titleTextColor = array.getColor(R.styleable.CollapsibleListView_CollapsibleTitleTextColor, DEFAULT_TITLE_TEXT_COLOR);        array.recycle();    }private void initBackground() {        // 外部矩形弧度        float[] outerR = new float[8];        for (int i = 0; i < outerR.length; i++) {            outerR[i] = cornerRadius;        }        RoundRectShape rr = new RoundRectShape(outerR, null, null);        ShapeDrawable background = new ShapeDrawable(rr);        //指定填充颜色        background.getPaint().setColor(contentColor);        // 指定填充模式        background.getPaint().setStyle(Paint.Style.FILL);        findViewById(R.id.ll_back).setBackgroundDrawable(background);        ShapeDrawable title = new ShapeDrawable(rr);        title.getPaint().setColor(titleColor);        title.getPaint().setStyle(Paint.Style.FILL);        tv_title.setBackgroundDrawable(title);    }

GitHub

https://github.com/zhuguohui/CollapsibleListViewDemo