GridView中均分中碰到的几个问题

来源：互联网发布：手机挡字幕软件编辑：程序博客网时间：2024/04/26 04:00

GridView使用过程中，碰到的几个坑，在此记录一下！

删掉GridView中grid view 外margin

  GridView gridView = new GridView(this);        setContentView(gridView);        gridView.setNumColumns(4);        //set STRETCH_SPACING stretch mode        gridView.setStretchMode(GridView.STRETCH_COLUMN_WIDTH);        //见下文“运行Demo，需要的其他部分”        SimpleAdapter adapter = new SimpleAdapter(this);        List<String> beanList = new ArrayList<>();        beanList.add(new String("叮咚新闻"));        beanList.add(new String("叮咚新闻"));        beanList.add(new String("叮咚新闻"));        beanList.add(new String("叮咚新闻"));        beanList.add(new String("叮咚新闻"));        adapter.setData(beanList);        gridView.setAdapter(adapter);//        //必须取代掉原来的布局，否则grid view 四周有相当大的边距//        gridView.setSelector(android.R.color.transparent);        gridView.setGravity(Gravity.CENTER);

运行效果如下：

这里写图片描述

这个黄色的不伦不类，不属于grid view，
参考：
http://www.educity.cn/wenda/151651.html
得知，是因为gridview中selector的问题，通过
gridView.setSelector(android.R.color.transparent)；替换掉即可

实现GridView中左右可用空间均分

这里使用STRETCH_COLUMN_WIDTH stretch mode.
这里写图片描述

   GridView gridView = new GridView(this);        setContentView(gridView);        gridView.setNumColumns(4);        //set STRETCH_SPACING stretch mode        gridView.setStretchMode(GridView.STRETCH_COLUMN_WIDTH);        SimpleAdapter adapter = new SimpleAdapter(this);        List<String> beanList = new ArrayList<>();        beanList.add(new String("叮咚新闻"));        beanList.add(new String("叮咚新闻"));        beanList.add(new String("叮咚新闻"));        beanList.add(new String("叮咚新闻"));        beanList.add(new String("叮咚新闻"));        adapter.setData(beanList);        gridView.setAdapter(adapter);        //必须取代掉原来的布局，否则grid view 四周有相当大的边距        gridView.setSelector(android.R.color.transparent);        gridView.setGravity(Gravity.CENTER);

实现GridView中左右边界grid cell，紧靠着边界

这里写图片描述

    GridView gridView = new GridView(this);        setContentView(gridView);        gridView.setNumColumns(4);        //set STRETCH_SPACING stretch mode        gridView.setStretchMode(GridView.STRETCH_SPACING);        //set columnWidth ，or looks strange as below        int viewWidth = (int) (getResources().getDisplayMetrics().density * 72);        gridView.setColumnWidth(viewWidth);        //SimpleAdapter 见下面的“运行Demo，需要的其他部分”        SimpleAdapter adapter = new SimpleAdapter(this);        List<String> beanList = new ArrayList<>();        beanList.add(new String("叮咚新闻"));        beanList.add(new String("叮咚新闻"));        beanList.add(new String("叮咚新闻"));        beanList.add(new String("叮咚新闻"));        beanList.add(new String("叮咚新闻"));        adapter.setData(beanList);        gridView.setAdapter(adapter);        //必须取代掉原来的布局，否则grid view 四周有相当大的边距        gridView.setSelector(android.R.color.transparent);        gridView.setGravity(Gravity.CENTER);

使用上面例子，不设置columnWidth，就会出现下面类似的情况：
这里写图片描述

运行Demo，需要的其他部分

<?xml version="1.0" encoding="utf-8"?>    <!--bg_label_normal.xml--><shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="rectangle">    <stroke        android:width="1px"        android:color="#e5e5e5"></stroke>    <corners android:radius="4dp"></corners>    <solid android:color="@android:color/white"></solid></shape>

<?xml version="1.0" encoding="utf-8"?>    <!--cell_drag_category_sub.xml--><TextView xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="@drawable/bg_label_normal"    android:gravity="center"    android:singleLine="true"    android:textColor="@android:color/black"    android:textSize="14sp"></TextView>

package com.hang.androidtestdemo;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.AbsListView;import android.widget.BaseAdapter;import android.widget.TextView;import java.util.List;public class SimpleAdapter extends BaseAdapter {    public SimpleAdapter(Context context) {        this.mContext = context;    }    private List<String> beanList;    private Context mContext;    public void setData(List<String> beanList) {        this.beanList = beanList;        notifyDataSetChanged();    }    @Override    public int getCount() {        return (beanList == null) ? 0 : beanList.size();    }    @Override    public String getItem(int position) {        String bean = beanList.get(position);        return bean;    }    @Override    public long getItemId(int position) {        return position;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        if (convertView == null) {            convertView = LayoutInflater.from(mContext).inflate(R.layout.cell_drag_category_sub, parent, false);            AbsListView.LayoutParams viewParams = (AbsListView.LayoutParams) convertView.getLayoutParams();            int viewHeight = (int) (mContext.getResources().getDisplayMetrics().density * 29);            int viewWidth = (int) (mContext.getResources().getDisplayMetrics().density * 72);            viewParams.height = viewHeight;            viewParams.width = viewWidth;        }        String item = getItem(position);        ((TextView) convertView).setText(item);        return convertView;    }}

0 0