android 调用系统照相机

 package com.b509.activity.patient;

 import java.io.File;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.text.SimpleDateFormat;

 import com.b509.activity.doctor.EditImage;

 import android.app.Activity;
 import android.content.Intent;
 import android.graphics.Bitmap;
 import android.net.Uri;
 import android.os.Bundle;
 import android.os.Environment;
 import android.provider.MediaStore;
 import android.util.Log;
 import android.widget.ImageButton;
 import android.widget.ImageView;

 public class PhotographActivity extends Activity {

     private Bitmap bitmap;
     private String date;
     private String fileName;
     private String pictureName;
     int flag_img;

     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         // setContentView(R.layout.phtot
         Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
         flag_img = getIntent().getIntExtra("photoflag", 1);

         startActivityForResult(intent, 1);
     }

     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         super.onActivityResult(requestCode, resultCode, data);
         if (resultCode == Activity.RESULT_OK) {
             String sdStatus = Environment.getExternalStorageState();
             // 检测sd是否可用
             if (!sdStatus.equals(Environment.MEDIA_MOUNTED)) {
                 Log.v("TestFile",
                         "SD card is not avaiable/writeable right now.");
                 return;
             }
             Bundle bundle = data.getExtras();
             // 获取相机返回的数据，并转换为Bitmap图片格式
             bitmap = (Bitmap) bundle.get("data");
             FileOutputStream b = null;
             File file = new File("/sdcard/myImage/");
             // 创建文件夹
             file.mkdirs();

             SimpleDateFormat sDateFormat = new SimpleDateFormat(
                     "yyyyMMddhhmmss");
             date = sDateFormat.format(new java.util.Date());
             pictureName = date + ".jpg";
             fileName = "/sdcard/myImage/" + date + ".jpg";
             System.out.println(fileName + "*******************");

             try {
                 b = new FileOutputStream(fileName);
                 bitmap.compress(Bitmap.CompressFormat.JPEG, 100, b);// 把数据写入文件

             } catch (FileNotFoundException e) {
                 e.printStackTrace();
             } finally {
                 try {
                     b.flush();
                     b.close();
                 } catch (IOException e) {
                     e.printStackTrace();
                 }
             }
             Intent intent = new Intent();
             intent.putExtra("getImagepath", fileName);
             System.out.println("图片路径============" + fileName);
             intent.setClass(PhotographActivity.this, EditImage.class);
             intent.putExtra("getFlag", flag_img);

             startActivity(intent);
             finish();
         }
     }
 }

调用系统照相机Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);这一句非常关键！