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今天写了一个简单的GridView,它是格子视图，可以将很多图片以一定大小显示出来在做相册、图片浏览是非常有用一下是xml文件:
1 <?xml version="1.0" encoding="utf-8"?> 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 3 android:layout_width="match_parent" 4 android:layout_height="match_parent" 5 android:orientation="vertical" > 6 7 <GridView android:id="@+id/gridview" 8 android:layout_width="fill_parent" 9 android:layout_height="fill_parent" 10 android:numColumns="auto_fit" 11 android:verticalSpacing="10dp" 12 android:horizontalSpacing="10dp" 13 android:columnWidth="90dp" 14 android:stretchMode="columnWidth" 15 android:gravity="center"> 16 17 </GridView> 18 </LinearLayout>
1 package com.example.widget; 2 3 import android.app.Activity; 4 import android.content.Context; 5 import android.os.Bundle; 6 import android.view.Menu; 7 import android.view.View; 8 import android.view.ViewGroup; 9 import android.widget.BaseAdapter; 10 import android.widget.GridView; 11 import android.widget.ImageView; 12 13 public class GridViewActivity extends Activity { 14 15 private GridView gridview; 16 private int[] mThumbIds = { R.drawable.acmilan, R.drawable.fcb, 17 R.drawable.manutd, R.drawable.rmcdf }; 18 19 @Override 20 protected void onCreate(Bundle savedInstanceState) { 21 // TODO Auto-generated method stub 22 super.onCreate(savedInstanceState); 23 setContentView(R.layout.gridview); 24 25 gridview = (GridView) findViewById(R.id.gridview); 26 gridview.setAdapter(new ImageAdapter(this)); 27 } 28 29 public class ImageAdapter extends BaseAdapter { 30 31 private Context mContext; 32 33 public ImageAdapter(Context c) { 34 mContext = c; 35 } 36 37 @Override 38 public int getCount() { 39 // TODO Auto-generated method stub 40 return mThumbIds.length; 41 } 42 43 @Override 44 public Object getItem(int position) { 45 // TODO Auto-generated method stub 46 return null; 47 } 48 49 @Override 50 public long getItemId(int position) { 51 // TODO Auto-generated method stub 52 return 0; 53 } 54 55 @Override 56 public View getView(int position, View convertView, 57 ViewGroup parent) { 58 // TODO Auto-generated method stub 59 ImageView imageView; 60 61 if (convertView == null) { 62 imageView = new ImageView(mContext); 63 imageView.setLayoutParams(new GridView.LayoutParams( 64 85, 85)); 65 imageView 66 .setScaleType(ImageView.ScaleType.FIT_CENTER); 67 imageView.setPadding(8, 8, 8, 8); 68 } else { 69 imageView = (ImageView) convertView; 70 } 71 72 imageView.setImageResource(mThumbIds[position]); 73 return imageView; 74 } 75 76 } 77 78 @Override 79 public boolean onCreateOptionsMenu(Menu menu) { 80 // TODO Auto-generated method stub 81 return super.onCreateOptionsMenu(menu); 82 } 83 84 }
这个例子最关键的地方就是ImageAdapter，它是继承自BashAdapter的类里面的方法都是继承的相应接口，getview函数是关键，他负责将获取数据后的组件返回，然后再讲gridview添加上适配器，这是一个简单的小例子，主要是熟悉一下BashAdapter的使用。
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原文地址：http://www.cnblogs.com/selfimprovement/p/4412952.html
