GridView的表格用途

刚开始学GridView的人都把文档里面的case学得很好，

模仿GridView用来做图片浏览等等工具，

但是GridView的一个重大功能，我们却提得很少，那应该就是用来做表格，

表格的作用也很大，比如说做统计，

本例子用来展示给大家怎么做初步的表格。

功能：做表格，根据每个单元格的不同含义，给单元格设置不同的背景色；

实现：通过GridView结合BaseAdapter实现；

案例源码：

第一步，新建一个Android应用：BaseAdapterDemoActivity;

第二部，重写main.xml,如下：

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<GridView
android:id="@+id/gridview"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>

第三步，在BaseAdapterDemoActivity.java文件中创建MyAdapter，基类是BaseAdapter，如下：

package hello.zcping.adapter;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.TextView;

public class BaseAdapterDemoActivity extends Activity {

private GridView mGridView;
private MyAdapter mMyAdapter;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
setupViews();
}

public void setupViews() {
mMyAdapter = new MyAdapter();
mGridView = (GridView) findViewById(R.id.gridview);
mGridView.setAdapter(mMyAdapter);
mGridView.setNumColumns(5);
}

private class MyAdapter extends BaseAdapter {
@Override
public int getCount() {
return 20;
}

@Override
public Object getItem(int arg0) {
return arg0;
}

@Override
public long getItemId(int position) {
return position;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
TextView mTextView = new TextView(getApplicationContext());
String[] abc = { "1", "2", "3", "4", "5", "6", "7", "8", "9", "10",
"11", "12", "13", "14", "15", "16", "17", "18", "19", "20" };

int[] icolor = { Color.GRAY, Color.GREEN, Color.RED, Color.WHITE,
Color.YELLOW, Color.GRAY, Color.GREEN, Color.RED,
Color.WHITE, Color.YELLOW, Color.GRAY, Color.GREEN,
Color.RED, Color.WHITE, Color.YELLOW, Color.GRAY,
Color.GREEN, Color.RED, Color.WHITE, Color.YELLOW };
mTextView.setText(abc[position]);
mTextView.setTextColor(Color.BLACK);
mTextView.setBackgroundColor(icolor[position]);
return mTextView;
}

}
}

效果如下：