用RecycleView实现StepView效果

作者: 浩运 | 来源:发表于2016-06-28 17:40 被阅读830次

用RecycleView实现StepView效果
超简单实现stepview
recycleview的多布局实现----带时间列表的图片管理集
RecycleView实现类抖音上下翻页效果（MVP+retro
NestedScrollView RecycleView 嵌套
RecycleView的左滑实现
Android自定义控件之StepView
Android之RecycleView实现指定范围的拖动效果
聊聊滑动嵌套的那些bug
利用RecycleView实现跑马灯和轮播图效果

要实现如下效果
期待的效果
发现要把文字上面的原点居中在文字区域好难实现，突然想起来前两天折腾的RecycleView的ItemDecoration，感觉可以用它来实现，于是开始码代码。

    public class Main2Activity extends AppCompatActivity {

    RecyclerView recyclerView;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
        recyclerView = (RecyclerView) findViewById(R.id.recyclerView);
        recyclerView.setLayoutManager(new LinearLayoutManager(getBaseContext(),LinearLayoutManager.HORIZONTAL,false));
        recyclerView.setAdapter(new MAdapter());
        recyclerView.addItemDecoration(new MItemDecoration());
    }

    /**
     * 选中的position
     */
    int selPosition = 0;
    public void btnNext(View view) {
        int preSel = selPosition;
        selPosition = (selPosition + 1) % 4;
        //刷新前面选中的状态，和当前选中的状态
        recyclerView.getAdapter().notifyItemChanged(selPosition);
        recyclerView.getAdapter().notifyItemChanged(preSel);

    }


    class MViewHolder extends RecyclerView.ViewHolder{

        public MViewHolder(View itemView) {
            super(itemView);
        }
    }

    class MAdapter extends RecyclerView.Adapter<MViewHolder> {
        @Override
        public MViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            TextView textView = (TextView) getLayoutInflater().inflate(R.layout.layout_item_tv, parent, false);
            textView.setText("AAAA");

            return new MViewHolder(textView);
        }

        @Override
        public void onBindViewHolder(MViewHolder holder, int position) {
            if (position == selPosition) {//高亮当前选中的文字颜色
                ((TextView)holder.itemView).setTextColor(Color.RED);
            }else{
                ((TextView)holder.itemView).setTextColor(Color.BLACK);
            }
        }

        @Override
        public int getItemCount() {
            return 4;
        }
    }



    class MItemDecoration extends RecyclerView.ItemDecoration{

        /**
         * 圆圈的半径
         */
        private int cicleRadious = PxUtils.dpToPx(15, getBaseContext());
        /**
         * 圆圈与顶部的距离
         */
        private int marginTop=PxUtils.dpToPx(10, getBaseContext());
        /**
         * 圆圈与线的距离
         */
        private int marginLine=PxUtils.dpToPx(5, getBaseContext());
        @Override
        public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
            Log.i("TEST", "onDrawOver: ");
            int childCount = parent.getChildCount();
            Drawable drawable = ContextCompat.getDrawable(getBaseContext(), R.drawable.shape_cicle);
            Drawable drawableSel = ContextCompat.getDrawable(getBaseContext(), R.drawable.shape_cicle_sel);
            Drawable drawableLine = ContextCompat.getDrawable(getBaseContext(), R.drawable.shape_line);
            Drawable drawableLineSel=ContextCompat.getDrawable(getBaseContext(), R.drawable.shape_line_sel);
            for (int i=0;i<childCount;i++) {
                View childAt = parent.getChildAt(i);
                int left = childAt.getLeft();
                int right = childAt.getRight();

                if (i == selPosition) {//选中的圆圈颜色
                    drawableSel.setBounds(left+childAt.getWidth()/2-cicleRadious,marginTop,right-childAt.getWidth()/2+cicleRadious,marginTop+cicleRadious*2);
                    drawableSel.draw(c);
                }else{
                    //圆圈的半径40px，距离顶部30px
                    drawable.setBounds(left+childAt.getWidth()/2-cicleRadious,marginTop,right-childAt.getWidth()/2+cicleRadious,marginTop+cicleRadious*2);
                    drawable.draw(c);
                }



                if (i > 0) {
                    View preView = parent.getChildAt(i - 1);
                    if (i == selPosition) {//选中的线的颜色
                        drawableLineSel.setBounds(preView.getRight()-preView.getWidth()/2+(cicleRadious+marginLine),marginTop+cicleRadious-drawableLine.getIntrinsicHeight()/2,childAt.getLeft()+childAt.getWidth()/2-(cicleRadious+10),marginTop+cicleRadious+drawableLine.getIntrinsicHeight());
                        drawableLineSel.draw(c);
                    }else{
                        //直线距离左右两边10px
                        drawableLine.setBounds(preView.getRight()-preView.getWidth()/2+(cicleRadious+marginLine),marginTop+cicleRadious-drawableLine.getIntrinsicHeight()/2,childAt.getLeft()+childAt.getWidth()/2-(cicleRadious+10),marginTop+cicleRadious+drawableLine.getIntrinsicHeight());
                        drawableLine.draw(c);
                    }
                }

            }
        }

    }
}

关键代码如下：

绘制圆圈和线，高亮当前的step

@Override
        public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
            Log.i("TEST", "onDrawOver: ");
            int childCount = parent.getChildCount();
            Drawable drawable = ContextCompat.getDrawable(getBaseContext(), R.drawable.shape_cicle);
            Drawable drawableSel = ContextCompat.getDrawable(getBaseContext(), R.drawable.shape_cicle_sel);
            Drawable drawableLine = ContextCompat.getDrawable(getBaseContext(), R.drawable.shape_line);
            Drawable drawableLineSel=ContextCompat.getDrawable(getBaseContext(), R.drawable.shape_line_sel);
            for (int i=0;i<childCount;i++) {
                View childAt = parent.getChildAt(i);
                int left = childAt.getLeft();
                int right = childAt.getRight();

                if (i == selPosition) {//选中的圆圈颜色
                    drawableSel.setBounds(left+childAt.getWidth()/2-cicleRadious,marginTop,right-childAt.getWidth()/2+cicleRadious,marginTop+cicleRadious*2);
                    drawableSel.draw(c);
                }else{
                    //圆圈的半径40px，距离顶部30px
                    drawable.setBounds(left+childAt.getWidth()/2-cicleRadious,marginTop,right-childAt.getWidth()/2+cicleRadious,marginTop+cicleRadious*2);
                    drawable.draw(c);
                }



                if (i > 0) {
                    View preView = parent.getChildAt(i - 1);
                    if (i == selPosition) {//选中的线的颜色
                        drawableLineSel.setBounds(preView.getRight()-preView.getWidth()/2+(cicleRadious+marginLine),marginTop+cicleRadious-drawableLine.getIntrinsicHeight()/2,childAt.getLeft()+childAt.getWidth()/2-(cicleRadious+10),marginTop+cicleRadious+drawableLine.getIntrinsicHeight());
                        drawableLineSel.draw(c);
                    }else{
                        //直线距离左右两边10px
                        drawableLine.setBounds(preView.getRight()-preView.getWidth()/2+(cicleRadious+marginLine),marginTop+cicleRadious-drawableLine.getIntrinsicHeight()/2,childAt.getLeft()+childAt.getWidth()/2-(cicleRadious+10),marginTop+cicleRadious+drawableLine.getIntrinsicHeight());
                        drawableLine.draw(c);
                    }
                }

            }
        }

切换Step

    /**
     * 选中的position
     */
    int selPosition = 0;
    public void btnNext(View view) {
        int preSel = selPosition;
        selPosition = (selPosition + 1) % 4;
        //刷新前面选中的状态，和当前选中的状态
        recyclerView.getAdapter().notifyItemChanged(selPosition);
        recyclerView.getAdapter().notifyItemChanged(preSel);

    }

高亮选中文字

        @Override
        public void onBindViewHolder(MViewHolder holder, int position) {
            if (position == selPosition) {//高亮当前选中的文字颜色
                ((TextView)holder.itemView).setTextColor(Color.RED);
            }else{
                ((TextView)holder.itemView).setTextColor(Color.BLACK);
            }
        }

layout_item_tv.xml

        <TextView xmlns:android="http://schemas.android.com/apk/res/android"
            android:gravity="bottom|center_horizontal"
            android:layout_width="80dp" android:layout_height="60dp">
        
        </TextView>

shape_cicle.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="ring"
    android:innerRadiusRatio="5"
    android:thicknessRatio="10"
    android:useLevel="false"
    >
    <solid android:color="#333" />

</shape>

shape_cicle_sel.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android" android:shape="ring"
    android:innerRadiusRatio="5"
    android:thicknessRatio="10"
    android:useLevel="false"
    >

    <solid android:color="@android:color/holo_red_light" />

</shape>

shape_line.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid
        android:color="@android:color/holo_purple" />
    <size android:height="1dp" />
</shape>

shape_line_sel.xml

<shape xmlns:android="http://schemas.android.com/apk/res/android">
    <solid
        android:color="@android:color/holo_red_dark" />
    <size android:height="1dp" />
</shape>

实现的效果

效果
是不是还不错。发现到尽头再滑动会有overScroll的效果，有点恶心，于是去掉它。
配置如下属性

    android:overScrollMode="never"

    <android.support.v7.widget.RecyclerView
        android:id="@+id/recyclerView"
        android:layout_width="match_parent"
        android:overScrollMode="never"
        android:layout_height="60dp">
    
    </android.support.v7.widget.RecyclerView>

当然，这个实现很简陋，只是做一个记录，后面会做进一步封装。

用RecycleView实现StepView效果
要实现如下效果期待的效果发现要把文字上面的原点居中在文字区域好难实现，突然想起来前两天折腾的RecycleView...
超简单实现stepview
一行代码实现stepview和timeline的方式
recycleview的多布局实现----带时间列表的图片管理集
一、效果图如上图所示：时间是一个布局，图片是一个布局。用recycleview的多布局实现上边的效果。二、具体...
RecycleView实现类抖音上下翻页效果（MVP+retro
主要借助RecycleView和PagerSnapHelper来实现上下翻页的效果，先上效果图： demo使用了M...
NestedScrollView RecycleView 嵌套
NestedScrollView RecycleView 嵌套滑动冲突场景描述效果演示实现思路问题和优化优化参考...
RecycleView的左滑实现
RecycleView的左滑实现最终的效果图是这样的要实现这样的一个效果，用到的关键技术：自定义view的基本...
Android自定义控件之StepView
项目地址：https://github.com/baoyachi/StepView StepView用来指示操作步...
Android之RecycleView实现指定范围的拖动效果
1 问题在RecycleView里面实现指定位置的拖动效果，（这里是实现线性布局的，不是网格布局的） @Ov...
聊聊滑动嵌套的那些bug
以上效果是app中很常见的一个滑动效果，我们可以用ListView，RecycleView，自定义ViewGrou...
利用RecycleView实现跑马灯和轮播图效果
先看下效果图利用Recycleview实现这个效果最主要的一个方法就是这个方法这个方法的作用是使得Recyce...