利用GridView显示SD卡的图片和两段文字

本实例包含一个主layout，含有一个GridView，还有一个用于填充GridView一行的layout，最后是重写一个GridView的适配器类。

由于图片是sd卡里的，没有图片id可用，所以需要重写BaseAdapter，而不是SimpleAdapter。

代码如下，很容易看懂。

1.main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:id="@+id/llRoot"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
   <GridView 
     android:id="@+id/GridView01" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent"
     android:verticalSpacing="5dip"
     android:horizontalSpacing="5dip"
     android:stretchMode="columnWidth"/>
</LinearLayout>

2.grid_row.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:id="@+id/rlGridRow"
 	android:layout_width="fill_parent"
 	android:layout_height="wrap_content" 
 	>
<ImageView 
	android:id="@+id/imageView01" 
	android:layout_width="36.0dip"
  	android:layout_height="36.0dip"
 	android:scaleType="fitCenter"
  	android:layout_alignParentLeft="true" />
<TextView android:id="@+id/txtLink1"
	android:paddingLeft="6.0dip" 
	android:layout_width="wrap_content"
	android:layout_height="wrap_content" 
	android:textColor="#FF00FF"
	android:layout_toRightOf="@id/imageView01" />
<TextView android:id="@+id/txtLink2"
	android:paddingLeft="6.0dip" 
	android:paddingBottom="8.0dip"
	android:layout_width="wrap_content" 
	android:layout_height="wrap_content"
	android:textColor="#00FFFF"
	android:textSize="12sp"
	android:layout_marginTop="-4.0dip" android:layout_toRightOf="@id/imageView01"
	android:layout_below="@id/txtLink1" />
</RelativeLayout>

3.java类

public class AndroidTest2_3_3 extends Activity {
	private static final String TAG = "AndroidTest2_3_3";
	private Bitmap bit;
	private String textArray1[] = {"婺源", "丹霞山", "周庄"};
	private String textArray2[] = {"油菜花盛开的地方", "红绿之间，雄壮与温柔", "梦中的水乡"};
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        
        String imagepath = Environment.getExternalStorageDirectory() + "/abc.jpg";
	    bit = BitmapFactory.decodeFile(imagepath);
	      
        GridView gv=(GridView)this.findViewById(R.id.GridView01);   
        Log.d(TAG, "+++++++++++1");
        ImageAdapter ia = new ImageAdapter(this);
        gv.setAdapter(ia);//为GridView设置数据适配器
        
    }
    
    /**
     * GridView适配器类，创建单元格view
     * @author ameyume
     *
     */
    public class ImageAdapter extends BaseAdapter {
	    private Context mContext;
	    public ImageAdapter(Context context) {
		    Log.d(TAG, "ImageAdapter 1");
	        mContext = context;
	    }
	   
	    public int getCount() { 
	        return textArray1.length;
	    }
	   
	    public Object getItem(int position) {
	        return position;
	    }
	   
	    public long getItemId(int position) {
	        return position;
	    }
	   
	    public View getView(int position, View convertView, ViewGroup parent) {
		    Log.d(TAG, "000000000000000");
		    View view = View.inflate(AndroidTest2_3_3.this, R.layout.grid_row, null);
		    RelativeLayout rl = (RelativeLayout)view.findViewById(R.id.rlGridRow);
		    ImageView image = (ImageView)rl.findViewById(R.id.imageView01);
		    image.setImageBitmap(bit);
		    TextView tv1 = (TextView)rl.findViewById(R.id.txtLink1);
		    tv1.setText(textArray1[position]);
		    TextView tv2 = (TextView)rl.findViewById(R.id.txtLink2);
		    tv2.setText(textArray2[position]);
		    return rl;
	    }
	} 
}

运行效果如图：