android如何拍照以及返回拍的图片（经过验证的实际例子）

package a.test;

import java.io.ByteArrayOutputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.InputStream;

import android.app.Activity;

import android.content.ActivityNotFoundException;

import android.content.ContentResolver;

import android.content.Intent;

import android.graphics.Bitmap;

import android.graphics.BitmapFactory;

import android.net.Uri;

import android.os.Bundle;

import android.os.Environment;

import android.provider.MediaStore;

import android.view.Gravity;

import android.widget.ImageView;

import android.widget.Toast;

public class a extends Activity {

 /** Called when the activity is first created. */

 String SD_CARD_TEMP_DIR;

 private byte[] mContent;

 Bitmap myBitmap;

 @Override

 public void onCreate(Bundle savedInstanceState) {

  super.onCreate(savedInstanceState);

  setContentView(R.layout.main);

  //

  SD_CARD_TEMP_DIR = Environment.getExternalStorageDirectory()

    + File.separator + "tmpPhoto.jpg";

  Intent takePictureFromCameraIntent = new Intent(

    MediaStore.ACTION_IMAGE_CAPTURE);

  takePictureFromCameraIntent.putExtra(

    android.provider.MediaStore.EXTRA_OUTPUT, Uri

      .fromFile(new File(SD_CARD_TEMP_DIR)));

  startActivityForResult(takePictureFromCameraIntent, 10);

  //

 }

 //

 @Override

 protected void onActivityResult(int requestCode, int resultCode, Intent data) {

  ContentResolver resolver = getContentResolver();

  try {

   File f = new File(SD_CARD_TEMP_DIR);

   try {

    Uri capturedImage = Uri

      .parse(android.provider.MediaStore.Images.Media

        .insertImage(getContentResolver(), f

          .getAbsolutePath(), null, null));

    // Log.i("camera", "Selected image: " +

    // capturedImage.toString());

    // f.delete();

    Toast toast = Toast.makeText(getApplicationContext(),

      capturedImage.toString(), Toast.LENGTH_SHORT);

    toast.setGravity(Gravity.CENTER_HORIZONTAL, 0, 0);

    toast.show();

    //

    ImageView a = (ImageView) findViewById(R.id.imageView1);

    // 将图片内容解析成字节数组

    mContent = readStream(resolver.openInputStream(Uri

      .parse(capturedImage.toString())));

    // 将字节数组转换为ImageView可调用的Bitmap对象

    myBitmap = getPicFromBytes(mContent, null);

    // //把得到的图片绑定在控件上显示

    a.setImageBitmap(myBitmap);

    //

    //

   } catch (FileNotFoundException e) {

    // TODO Auto-generated catch block

    e.printStackTrace();

   }

  } catch (Exception e) {

   // TODO: handle exception

   System.out.println(e.getMessage());

  }

 }

 //

 public static Bitmap getPicFromBytes(byte[] bytes,

   BitmapFactory.Options opts) {

  if (bytes != null)

   if (opts != null)

    return BitmapFactory.decodeByteArray(bytes, 0, bytes.length,

      opts);

   else

    return BitmapFactory.decodeByteArray(bytes, 0, bytes.length);

  return null;

 }

 //

 public static byte[] readStream(InputStream inStream) throws Exception {

  byte[] buffer = new byte[1024];

  int len = -1;

  ByteArrayOutputStream outStream = new ByteArrayOutputStream();

  while ((len = inStream.read(buffer)) != -1) {

   outStream.write(buffer, 0, len);

  }

  byte[] data = outStream.toByteArray();

  outStream.close();

  inStream.close();

  return data;

 }

 //

 public static Bitmap getLoacalBitmap(String url) {

  try {

   FileInputStream fis = new FileInputStream(url);

   return BitmapFactory.decodeStream(fis);

  } catch (FileNotFoundException e) {

   e.printStackTrace();

   return null;

  }

 }

 //

}