使用ExifInterface获取图片信息

 package com.example.readimage;

 import java.io.IOException;

 import android.media.ExifInterface;
 import android.os.Bundle;
 import android.os.Environment;
 import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.view.Menu;
 import android.view.View;

 public class MainActivity extends Activity {

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
     }

     public void read(View view){
        try {
            String path = Environment.getExternalStorageDirectory().getPath();
            System.out.println(path);
             ExifInterface exif = new ExifInterface(path+"/aa.jpg");
             System.out.println(exif);
             //
             String width = exif.getAttribute(ExifInterface.TAG_IMAGE_WIDTH);
             System.out.println(width);
             String time = exif.getAttribute(ExifInterface.TAG_IMAGE_LENGTH);
             System.out.println(time);
             //拍摄设备
             /*String mode = exif.getAttribute(ExifInterface.TAG_MODEL);
             System.out.println(mode);*/
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

 }

注意：有些数据是获取不到的，并且容易报错