Android中显示照片的Exif信息

package com.hyzhou.pngexifdemo;

import android.media.ExifInterface;
import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.view.Menu;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends Activity {

    private ImageView img;
    String path="sdcard/DCIM/Camera/IMG_20130924_134616.jpg";
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        img=(ImageView)findViewById(R.id.imageView1);
        Bitmap bitmap=BitmapFactory.decodeFile(path);
        try {
            img.setImageBitmap(bitmap);
        } catch (Exception e) {
            e.printStackTrace();
        }
        /*
         * 目前Android SDK定义的Tag有:
        TAG_DATETIME 时间日期
        TAG_FLASH 闪光灯
        TAG_GPS_LATITUDE 纬度
        TAG_GPS_LATITUDE_REF 纬度参考 
        TAG_GPS_LONGITUDE 经度
        TAG_GPS_LONGITUDE_REF 经度参考 
        TAG_IMAGE_LENGTH 图片长
        TAG_IMAGE_WIDTH 图片宽
        TAG_MAKE 设备制造商
        TAG_MODEL 设备型号
        TAG_ORIENTATION 方向
        TAG_WHITE_BALANCE 白平衡
        */ 
        
        try {
            //android读取图片EXIF信息
            ExifInterface exifInterface=new ExifInterface(path);
            String smodel=exifInterface.getAttribute(ExifInterface.TAG_MODEL);
            String width=exifInterface.getAttribute(ExifInterface.TAG_IMAGE_WIDTH);
            String height=exifInterface.getAttribute(ExifInterface.TAG_IMAGE_LENGTH);
            Toast.makeText(MainActivity.this, smodel+"  "+width+"*"+height, Toast.LENGTH_LONG).show();
        } catch (Exception e) {
            e.printStackTrace();
        }
        
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }

}