求大神解答，困扰已久:Android 调用相机返回的data空值有关问题

求大神解答，困扰已久:Android 调用相机返回的data空值问题
我的代码是这样的：

package com.example.testcamera;

import java.io.File;

import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageView;

import com.example.testcamera.R;

public class MainActivity extends Activity {

private static final int RESULT_CAPTURE_IMAGE = 1;
String fileName = Environment.getExternalStorageDirectory() + "/taxi51/download" + File.separator + "myHeader.jpg";
ImageView image = null;
Uri photoUri = null;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        image = (ImageView) findViewById(R.id.img_persion);
        image.setOnClickListener(new OnClickListener(){
         public void onClick(View v)
         {
                Intent imageCaptureIntent = new Intent("android.media.action.IMAGE_CAPTURE");
                
                imageCaptureIntent.putExtra(MediaStore.Images.Media.ORIENTATION, 0); 
                imageCaptureIntent.putExtra(MediaStore.EXTRA_OUTPUT,
                        Uri.fromFile(new File(fileName)));
                startActivityForResult(imageCaptureIntent, Activity.DEFAULT_KEYS_DIALER);
         }
        });
        
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
            switch (requestCode) {
            
            case RESULT_CAPTURE_IMAGE:
                    if (resultCode == -1) {
                    if(data.getExtras() == null)
                    {
                     System.out.println("data空的");
                    }else
                    {
                     System.out.println("data不是空的");
                    }
                   Bundle bundle = data.getExtras();
                   Bitmap bitmap = (Bitmap) bundle.get("data");
                   image.setImageBitmap(bitmap);
                    }
                    break;
            }
    }


}
现在出现的错误代码如下：


03-19 10:03:48.946: W/dalvikvm(4845): threadid=1: thread exiting with uncaught exception (group=0x41876498)
03-19 10:03:48.956: E/AndroidRuntime(4845): FATAL EXCEPTION: main
03-19 10:03:48.956: E/AndroidRuntime(4845): java.lang.RuntimeException: Failure delivering result ResultInfo{who=null, request=1, result=-1, data=null} to activity {com.example.testcamera/com.example.testcamera.MainActivity}: java.lang.NullPointerException