Android中利用GridView实现水平和垂直均有滚动条的

研究了一下Android的GridView,但是默认的GridView只支持垂直滚动,不支持水平滚动,有时我们为了实现表格效果,想达到水平和垂直均有滚动条,可以利用下面方法实现)。

1)main.xml  -- 布局文件

<?xml version="1.0" encoding="utf-8"?>
<HorizontalScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:alwaysDrawnWithCache="true"
    android:orientation="vertical"
    android:scrollbarAlwaysDrawHorizontalTrack="true"
    android:scrollbarAlwaysDrawVerticalTrack="true"
    android:scrollbars="horizontal|vertical" >

<FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="fill_parent" >

<GridView
            android:id="@+id/data_gridview"
            android:layout_width="1395dip"  <!--表格需要45列,每列31dip,所以总的宽度是1395dip-->
            android:layout_height="fill_parent"
            android:layout_gravity="center"
            android:background="#ff0000"
            android:columnWidth="31dip" <!--每列的宽度-->
            android:gravity="center"
            android:numColumns="45"          <!-- 注意这里,指定gridview有45列,每列的宽度是31个dip-->
            android:scrollbarAlwaysDrawHorizontalTrack="true"
            android:scrollbarAlwaysDrawVerticalTrack="true"
            android:scrollbars="horizontal|vertical"
            android:horizontalSpacing="1dip"  <!-- 这里和下面的1dip是为了显示表格的格子边框线,做成像表格的效果-->
            android:verticalSpacing="1dip" />
    </FrameLayout>

</HorizontalScrollView>

2) 每个gridcell对应的layout文件 --


imagecell.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

<ImageView android:id="@+id/CellImage"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerInParent="true" >
    </ImageView>

</RelativeLayout>


3)Activity的代码 -- 这里为了提高性能,实现了重用View的机制

package com.xxxx.ui

import xxxx.xxxx

public class GridViewTestActivity extends Activity {

private int disp_rows = 20;  //显示多少行
    private final static int COLUMN_CNT = 45; //显示多少列,这个要和layout文件里面对应起来

private GridView dataGridView;
       
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       
        dataGridView = (GridView) findViewById(R.id.data_gridview);
        dataGridView.setNumColumns(COLUMN_CNT);//一共45列
       
        dataGridView.setAdapter(new CellAdapter(getApplicationContext()));
        dataGridView.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
                Toast.makeText(GridViewTestActivity.this, "" + position, Toast.LENGTH_SHORT).show();
            }
        });       

} //end onCreate

class CellAdapter extends BaseAdapter {
        private Context mContext;
        private LayoutInflater mInflater;

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