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给GridView每行加上分割线

2024-07-15 03:50:40   222人阅读

大概思想就是：既然在GridView里没有设置的方法，那就直接加在item里，在通过别的方法改变item的显示效果，从而达到设置分割线的方法~废话不多说~下面详细的介绍：首先是GridView的布局，android:numColumns=”3″ 每行三列

<GridView       android:id="@+id/content"       android:layout_width="fill_parent"       android:layout_height="match_parent"       android:numColumns="3" >   </GridView>

接下来是item的布局

<?xml version="1.0" encoding="UTF-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    android:orientation="vertical" >    <FrameLayout        android:id="@+id/layout"        android:layout_width="fill_parent"        android:layout_height="105dp"        android:layout_marginBottom="13dp"        android:layout_marginTop="13dp"        android:orientation="vertical" >        <ImageView            android:id="@+id/imageView"            android:layout_width="fill_parent"            android:layout_height="105dp"            android:scaleType="centerCrop" />        <RelativeLayout            android:layout_width="fill_parent"            android:layout_height="40dp"            android:layout_gravity="bottom"            android:background="#50000000" >            <TextView                android:id="@+id/textView"                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_centerInParent="true"                android:gravity="center"                android:maxLines="2"                android:paddingLeft="10dp"                android:paddingRight="10dp"                android:textColor="@color/text_color"                android:textSize="16sp" />        </RelativeLayout>    </FrameLayout>    <View        android:id="@+id/line"        android:layout_width="fill_parent"        android:layout_height="1px"        android:background="@color/line_color" /></LinearLayout>

接下来是最重要的数据显示了，自定义一个GridViewAdapter继承

public class GridViewAdapter extends BaseAdapter {    private LayoutInflater inflater;    private Context context;    private List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();    public GridViewAdapter(Context context, List<Map<String, Object>> list) {        super();        this.context = context;        this.list = list;        inflater = LayoutInflater.from(context);    }    @Override    public int getCount() {        return list.size();    }    @Override    public Object getItem(int position) {        return list.get(position);    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup arg2) {        Viewholder viewholder = null;        if (convertView == null) {            convertView = inflater.inflate(R.layout.gridview_item, null);            viewholder = new Viewholder(convertView);            convertView.setTag(viewholder);        } else {            viewholder = (Viewholder) convertView.getTag();        }        viewholder.update(list.get(position),position);        return convertView;    }    public class Viewholder {        private ImageView imageView;        private TextView textView;        private FrameLayout layout;        private View view;        public Viewholder(View convertView) {            imageView=(ImageView) convertView.findViewById(R.id.imageView);            textView=(TextView) convertView.findViewById(R.id.textView);            layout=(FrameLayout) convertView.findViewById(R.id.layout);            view=convertView.findViewById(R.id.line);        }        public void update(Map<String, Object> map,int position) {            textView.setText(map.get("name").toString());            int i=0;            i=position%3;            switch (i) {            case 0:                //每列第一个item不包括分割线的layout右内边距20                layout.setPadding(0, 0, 20, 0);                break;            case 1:                //每列第二个item不包括分割线的layout左、右内边距各10                layout.setPadding(10, 0, 10, 0);                break;            case 2:                //每列第三个item不包括分割线的layout左内边距20；必须使三个item的宽度一致                layout.setPadding(20, 0, 0, 0);                break;            default:                break;            }            String id=map.get("id").toString();            setImage(id, imageView);            setLine(position, view);        }    }    private void setImage(String id,ImageView imageView){        if(id.equals("1")){            imageView.setImageResource(R.drawable.img1);        }else if(id.equals("2")){            imageView.setImageResource(R.drawable.img2);        }else if(id.equals("3")){            imageView.setImageResource(R.drawable.img3);        }else if(id.equals("4")){            imageView.setImageResource(R.drawable.img4);        }else if(id.equals("5")){            imageView.setImageResource(R.drawable.img5);        }    }    private void setLine(int position,View view){        int i=0;        i=list.size()%3;        if(position+i+1>list.size()){            //最后一行分割线隐藏            view.setVisibility(View.GONE);        }    }

device

以上文章摘自：http://www.easymorse.com/index.php/archives/2120


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